| 1. |
|
|
| 2. |
- Chrcanovic, Bruno, et al.
(författare)
-
Bone Quality and Quantity and Dental Implant Failure: A Systematic Review and Meta-analysis
- 2017
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing. - 0893-2174 .- 1942-4426 .- 1139-9791. ; 30:3, s. 219-237
-
Forskningsöversikt (refereegranskat)abstract
- Purpose: The aim of this study was to test the null hypothesis that there is no difference in implant failure rates, marginal bone loss, and postoperative infection for implants inserted in bone with different qualities and quantities according to the classification of Lekholm and Zarb. Materials and Methods: An electronic search was undertaken in January 2015 for randomized and nonrandomized human clinical studies. Results: A total of 94 publications were included. When bone sites of different qualities were considered, the results suggested the following comparative implant failure rates: 1 > 2, 1 > 3, 3 > 2, 4 > 1, 4 > 2, and 4 > 3. Sensitivity analyses suggested that when implants inserted in bone qualities 1 and 2 and 1 and 3 were compared, oxidized and sandblasted/acid-etched surfaces showed a decrease in significant difference in failures compared with turned implants. The same is not true for failure of implants inserted in bone quality 4 compared to failure of implants in all other bone qualities. When bone sites of different quantities were considered, the following comparative implant failure rates were observed: A > B, A > C, A < D, B < C, B < D, C < D, E > A, E > B, E > C, E > D. Due to insufficient information, meta-analyses for the outcomes postoperative infection and marginal bone loss were not performed. Conclusion: Sites with poorer bone quality and lack of bone volume may statistically affect implant failure rates. Implant surfaces may play a role in failure of implants in different bone qualities.
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
- Mattheos, Nikos, et al.
(författare)
-
The Implant Supracrestal Complex and Its Significance for Long-Term Successful Clinical Outcomes
- 2021
-
Ingår i: International Journal of Prosthodontics. - : Quintessence. - 0893-2174 .- 1139-9791 .- 1942-4426. ; 34:1, s. 88-100
-
Forskningsöversikt (refereegranskat)abstract
- Emerging evidence implies significant interrelations between the condition of the peri-implant tissues and the implant-abutment-prosthesis complex. A new paradigm for studying the peri-implant tissues in close interrelation with the implant-abutment-prosthesis complex in the presence of the oral biofilm is essential. The aims of this paper are to introduce the concept of the "implant supracrestal complex" (ISC) and to describe the critical elements that define it as a unique anatomical and functional system of human tissues, mechanical components, and oral bacteria/biofilm. This paper reviews recent evidence to identify the impact of design features on short-term clinical outcomes and long-term health of the peri-implant bone and soft tissues. Prosthetic-driven implant placement is a prerequisite for proper ISC design, which in turn can indirectly influence the structure and dimensions of the peri-implant soft tissues. Design features of the implant-prosthesis-abutment complex, such as the emergence profile, emergence angle, and cervical margin, as well as the design of the implant-abutment and abutment-prosthesis junctions and their locations in relation to the tissues of the ISC, can have a significant impact on the maintenance of stable and healthy peri-implant tissues in the long term.
|
|
| 7. |
- Olander, Julia, 1984, et al.
(författare)
-
Implant-Supported Single Crowns with Titanium or Zirconia Abutments: A Retrospective Up-to-5-year Follow-up Study.
- 2022
-
Ingår i: The International journal of prosthodontics. - : Quintessence Publishing. - 1942-4426 .- 0893-2174. ; 35:4, s. 387-395
-
Tidskriftsartikel (refereegranskat)abstract
- To compare the clinical outcomes of single implants with titanium (Ti) or zirconia (Zr) abutments after up to 5 years in function.This study was a retrospective analysis on single implants with screw-retained abutments (Zr or Ti) covered with porcelain veneer placed between 2011 and 2013 at one referral specialist clinic. Clinical data from patient records were collected from 132 patients and 174 implants. Technical complications such as fractures, chipping, and abutment screw loosening were registered. Radiographs were analyzed comparing both annual bone loss and accumulated bone loss at 5 years. In 57 patients with 85 implants, the values of accumulated bone loss at 5 years were compared to baseline.Technical complications occurred in 16 (9%) of the implants, most often during the first year. The following complications were found: fracture of the abutment (n = 1); loosening of the abutment screws (n = 5); and chipping of the porcelain veneer (n = 11). Ti abutments had more complications than Zr abutments (79%). Of all the implants, 45% had an annual bone loss ranging between 0.05 and 2.15 mm, and 59% had an accumulated bone loss at 5 years ranging between 0.05 and 4.25 mm. Zr abutments had a statistically significantly higher amount of yearly and accumulated bone loss at 5 years.Abutment material affected marginal bone loss. The Zr group displayed statistically more bone loss both yearly and after 5 years compared to the Ti group. Technical complications were not affected by abutment material but were affected by age of the patient.
|
|
| 8. |
|
|
| 9. |
|
|
| 10. |
- Albrektsson, Tomas, 1945, et al.
(författare)
-
Direct bone anchorage of oral implants: clinical and experimental considerations of the concept of osseointegration.
- 1990
-
Ingår i: The International journal of prosthodontics. - 0893-2174. ; 3:1, s. 30-41
-
Forskningsöversikt (refereegranskat)abstract
- The term osseointegration is analyzed in relation to its theoretical and clinical definitions, and comparisons are made to other implant modalities. The term osseointegration has a clear clinical meaning, but there is doubt about its precise usage in an experimental setting. Clinically, an implant can be described as osseointegrated if there is no discernable movement when force is applied to the fixture. This is in contrast to implants surrounded by fibrous connective tissue, which move within soft tissue. Newly developed laboratory techniques may be used in the future to precisely characterize osseointegration in the laboratory.
|
|
| 11. |
- Albrektsson, Tomas, 1945, et al.
(författare)
-
On crestal/marginal bone loss around dental implants.
- 2012
-
Ingår i: The International journal of prosthodontics. - : Quintessence Publishing co inc. - 0893-2174 .- 1139-9791. ; 27:4, s. 736-738
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
|
|
| 12. |
|
|
| 13. |
- Albrektsson, Tomas, 1945
(författare)
-
Where are we coming from?
- 2018
-
Ingår i: International Journal of Prosthodontics. - 0893-2174. ; 31
-
Tidskriftsartikel (refereegranskat)
|
|
| 14. |
|
|
| 15. |
- Ballo, Ahmed, 1978, et al.
(författare)
-
Alternative fabrication method for chairside fiber-reinforced composite resin provisional fixed partial dentures.
- 2011
-
Ingår i: The International journal of prosthodontics. - 0893-2174. ; 24:5, s. 453-6
-
Tidskriftsartikel (refereegranskat)abstract
- A high level of clinical skill is required for fabricating a provisional fixed partial denture with fiber-reinforced composite resin (FRC) using either the direct or chairside technique. The freehand approach to restoring missing teeth represents a challenge to the clinician, particularly when shaping and finishing a hygienic pontic. This technical report describes a simplified method for chairside fabrication of a fixed dental prosthesis with FRC. It is based on using a translucent template to guide the buildup procedure and to ensure optimal anatomy and function. Int J Prosthodont 2011;24:453-456.
|
|
| 16. |
|
|
| 17. |
- Bergman, B, et al.
(författare)
-
An intraindividual clinical comparison of 2 metal-ceramic systems.
- 1999
-
Ingår i: International Journal of Prosthodontics. - 0893-2174 .- 1139-9791. ; 12:5, s. 444-7
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: It has been questioned whether the surface and color of the ceramic and the metal-ceramic bond strength of a titanium-ceramic system are comparable to those of a conventional noble alloy-ceramic system. It was therefore the aim of this study to carry out an intraindividual clinical comparison between crowns fabricated according to the Procera system (titanium copings veneered with a low-fusing ceramic) and noble-alloy copings veneered with a medium-fusing ceramic. MATERIALS AND METHODS: Twenty-one crown pairs were fabricated for eighteen patients; three of the patients were each provided with two crown pairs. After 2 years nineteen crown pairs in sixteen patients could be compared. Clinical examinations were performed by two calibrated dentists who are long experienced in prosthetic dentistry. The crowns were rated according to the California Dental Association system. In addition, Bleeding Index and Margin Index were evaluated. RESULTS: After 2 years the quality of surface and color of the ceramic material seemed to have deteriorated more in titanium-ceramic crowns than in conventional metal-ceramic crowns, although the difference was not statistically significant. Regarding anatomic form, margin integrity, Bleeding Index, and Margin Index the differences between the two crown systems were small. CONCLUSION: The low-fusing ceramics have been subject to improvements during the last few years. Their bond strength to titanium seems to be comparable to that of conventional metal-ceramic systems. However, in the long run one problem may be the surface and color stability of low-fusing ceramics. To make extended long-term comparisons between the two metal-ceramic systems possible the present patient material will be followed for a longer period than the current 2 years.
|
|
| 18. |
|
|
| 19. |
|
|
| 20. |
- Carlsson, Gunnar E, 1930, et al.
(författare)
-
A survey of the use of mandibular implant overdentures in 10 countries.
- 2004
-
Ingår i: The International journal of prosthodontics. - 0893-2174. ; 17:2, s. 211-7
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: This preliminary international survey compared provision of implant-retained overdentures to fixed implant-supported prostheses for edentulous mandibles. MATERIALS AND METHODS: Questionnaires based on a 2001 Swedish study were sent to prosthodontists and specialist clinics in nine additional countries. RESULTS: Response rate varied from 53% to 100% in 10 national surveys and should allow careful comparison of results. The relationship between implant overdentures and fixed implant-supported prostheses in treatment of edentulous mandibles varied much; in Sweden, the proportion of overdentures was 12%, whereas it was 93% in The Netherlands. In all countries, the most common reason for choice of the overdenture was reduced cost. In all but two countries, the majority of respondents thought that patients with implant overdentures were equally or more satisfied with overdentures as those with fixed implant-supported prostheses. CONCLUSION: There were great differences among the 10 countries in choice of implant treatment of the edentulous mandible. The relative proportion of mandibular overdentures to fixed prostheses was low in Sweden and Greece and varied from one to two thirds in the other countries, except The Netherlands.
|
|
| 21. |
- Carlsson, Gunnar E, 1930, et al.
(författare)
-
Long-term marginal periimplant bone loss in edentulous patients.
- 2000
-
Ingår i: The International journal of prosthodontics. - 0893-2174. ; 13:4, s. 295-302
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The aim of this study was to examine the long-term periimplant bone loss in patients treated with implant-supported fixed prostheses in both jaws. MATERIALS AND METHODS: The participants comprised 44 edentulous patients who have been followed for a 15-year period after treatment with a fixed implant-supported prosthesis in the mandible. Thirteen of them also received an implant-supported fixed prosthesis in the maxilla, on average 4.5 years after the mandibular treatment. The periimplant bone level was measured on intraoral radiographs. RESULTS: The long-term results of the implant treatment were successful, and only 1% (3/273) of the implants were lost in the mandible and 7% (5/75) in the maxilla. All but one of the failures occurred before the connection of the prostheses. The mean marginal bone loss around the implants was small (less than 1 mm for a 10-year period after implant placement), and was of similar magnitude in both jaws. However, the individual variation was relatively great. There was no significant difference in marginal bone loss between those who had a maxillary complete denture during the entire observation period and those who had received a fixed implant-supported maxillary prosthesis. Smokers lost more periimplant bone than did the nonsmokers; the difference was significant in the mandible but small and nonsignificant in the maxilla. CONCLUSION: The long-term periimplant bone loss was small and of similar magnitude in the mandible and the maxilla in subjects who had received implant-supported fixed prostheses in both jaws. The prosthetic status in the maxilla, i.e., complete denture or fixed implant-supported prosthesis, had no significant influence on the mandibular periimplant bone loss.
|
|
| 22. |
- Chrcanovic, Bruno, et al.
(författare)
-
Impact of Different Surgeons on Dental Implant Failure
- 2017
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing. - 0893-2174 .- 1139-9791. ; 30:5, s. 445-454
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To assess the influence of several factors on the prevalence of dental implant failure, with special consideration of the placement of implants by different dental surgeons. Materials and Methods: This retrospective study is based on 2,670 patients who received 10,096 implants at one specialist clinic. Only the data of patients and implants treated by surgeons who had inserted a minimum of 200 implants at the clinic were included. Kaplan-Meier curves were stratified with respect to the individual surgeon. A generalized estimating equation (GEE) method was used to account for the fact that repeated observations (several implants) were placed in a single patient. The factors bone quantity, bone quality, implant location, implant surface, and implant system were analyzed with descriptive statistics separately for each individual surgeon. Results: A total of 10 surgeons were eligible. The differences between the survival curves of each individual were statistically significant. The multivariate GEE model showed the following variables to be statistically significant: surgeon, bruxism, intake of antidepressants, location, implant length, and implant system. The surgeon with the highest absolute number of failures was also the one who inserted the most implants in sites of poor bone and used turned implants in most cases, whereas the surgeon with the lowest absolute number of failures used mainly modern implants. Separate survival analyses of turned and modern implants stratified for the individual surgeon showed statistically significant differences in cumulative survival. Conclusion: Different levels of failure incidence could be observed between the surgeons, occasionally reaching significant levels. Although a direct causal relationship could not be ascertained, the results of the present study suggest that the surgeons' technique, skills, and/or judgment may negatively influence implant survival rates.
|
|
| 23. |
|
|
| 24. |
|
|
| 25. |
- Collin Bagewitz, Ingrid, et al.
(författare)
-
Oral prostheses and oral health-related quality of life : a survey study of an adult Swedish population
- 2007
-
Ingår i: International Journal of Prosthodontics. - 0893-2174 .- 1139-9791. ; 20:2, s. 132-142
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The purpose of the study was to investigate whether oral health-related quality of life (OHRQOL) in an adult Swedish population could be explained by social attributes; individual attributes; dental status, with a special focus on the role of prosthodontics; and dental care attitudes. MATERIALS AND METHODS: The study was based on responses to a questionnaire sent in 1998 to a random sample of 1,974 persons aged 50 to 75 years (66% response rate). Three factors representing various aspects of OHRQOL were set as dependent variables in multiple-regression models: oral health impact on everyday activities, oral health impact on the psychologic dimension, and oral health impact on oral function. Independent variables in the models were social attributes, individual attributes, number of teeth, denture (ie, type of denture, if present), and dental care attitudes. RESULTS: General health in relation to age peers had the strongest association with all 3 dependent variables, followed by number of teeth and need care--cost barrier. When number of teeth was excluded, removable denture was found to covary with the dependent variables in each of the 3 regression models. CONCLUSION: The number of remaining teeth is more important than the type of denture in explaining OHRQOL. It is less important that a denture is fixed for those with few remaining teeth, in contrast to all others. Explanations are also found in general health and various aspects of dental care costs.
|
|
| 26. |
- Dahlmo, K I, et al.
(författare)
-
On a new method to assess the accuracy of a CAD program.
- 2001
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing. - 0893-2174 .- 1139-9791. ; 14:3, s. 276-83
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: This study was initiated with the purpose of developing and evaluating a system for measuring the magnitude of the variation between a computer-aided design (CAD) object created on the computer screen and a replicated object produced by computer-aided manufacturing (CAM). MATERIALS AND METHODS: Controlled geometric forms, a square and a cone, were designed in a CAD program, and measuring distances were selected. The CAD data were transmitted to CAM data, and objects were produced. The CAD/CAM process was the Procera system, and the holder system permitted the objects to be ground into cross sections, similar to the visualization in the CAD program. Five objects of each shape were produced and measured by two operators two times. Three operators measured one of the objects 30 times. RESULTS: Observed values were greater than the true value. For all objects, the systematic error was at most 15.5 microns. Interoperator difference was small. The variation because of measurement error was greater for the square object compared to the cone. However, the variation because of object was higher for the cone object than for the square. The total standard deviation was 7.7 microns. Thus, the total random error caused by object variation and measurement error was in approximately 95% of all measurements less than 15 microns. CONCLUSION: There are no differences in the measurement data derived from this method and actual measurement data from an object created by the computer-aided dental design program. The method has high validity and reliability, i.e., high accuracy.
|
|
| 27. |
|
|
| 28. |
- Ekberg, EwaCarin, et al.
(författare)
-
A 6- and 12-month follow-up of appliance therapy in TMD patients : a follow-up of a controlled trial
- 2002
-
Ingår i: International Journal of Prosthodontics. - 0893-2174 .- 1139-9791. ; 15:6, s. 564-570
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: This study compared the long-term effects of treatment with a stabilization appliance and treatment with a control appliance in patients with temporomandibular disorders (TMD). MATERIALS AND METHODS: In a controlled trial, 60 TMD patients with tem-poromandibular joint (TMJ) pain were evaluated after 10 weeks of treatment with either a stabilization appliance or a control appliance. At the 10-week follow-up, the 60 patients were assigned to one of three groups according to their demand for treatment. Group T, the treatment group, comprised 30 patients treated with a stabilization appliance; group C, the control group, comprised nine patients treated with a control appliance; and group M, the mixed treatment group, comprised 21 patients treated with first a control appliance and then a stabilization appliance. Signs and symptoms were evaluated in all three groups at 6- and 12-month follow-ups. RESULTS: At the 6- and 12-month follow-ups, a significant reduction in TMJ pain as measured on a visual analogue scale was found in all three groups, and a significant decrease in signs and symptoms was found in groups T and M. CONCLUSION: After 6 and 12 months of use, the stabilization appli-ance was found to still be effective in the alleviation of signs and symptoms in patients with TMD. Many patients in group C changed to a stabilization appliance at the 1 0-week follow-up, which significantly reduced the number of patients in this group. Most patients reported positive change in overall subjective symptoms in this trial. The stabilization appliance can therefore be recommended for patients with TMD.
|
|
| 29. |
- Ekelund, Jan-Anders, et al.
(författare)
-
Implant treatment in the edentulous mandible: a prospective study on Brånemark system implants over more than 20 years.
- 2003
-
Ingår i: The International journal of prosthodontics. - 0893-2174. ; 16:6, s. 602-8
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: This prospective investigation studied the clinical and radiographic performance of mandibular fixed prostheses supported by osseointegrated implants over more than 20 years. MATERIALS AND METHODS: A total of 273 standard Brånemark implants (10 mm long) were placed in 47 patients between 1978 and 1982. Clinical and radiographic data collected at several examinations over the 20-year observation period have been reported previously. This study presents the outcome of the latest follow-up after 20 to 23 years. RESULTS: Thirty patients (64%; 75% of those still alive) attended the 20-year follow-up examination. Three implants were lost during the entire observation period, and the 20-year implant cumulative survival rate was 98.9%. All patients had continuous prosthesis function, but two had their mandibular prostheses remade during the 20 years. No implants or prostheses were lost or fractured during the last 5 years, and only a few prosthodontic complications were noted. The mean bone level was 1.6 mm (SD 0.90) below the reference point after 20 years, and mean bone loss was 0.2 mm (SD 0.22) between the 15- and 20-year follow-ups. Thirty-seven implants (24%) showed more than two exposed threads at the 15-year follow-up examination, but only four implants (3%) presented pain and/or bone loss exceeding one thread (0.6 mm) during the last 5 years. CONCLUSION: The successful treatment result after 15 years continued up to more than 20 years in function. During the last 5 years, a majority of the implants with several exposed implant threads could be maintained without any complications, and the frequency of implants showing signs of ongoing peri-implantitis was less than 3%.
|
|
| 30. |
- Ekfeldt, A., et al.
(författare)
-
Treatment with Implant-Supported Fixed Dental Prostheses in Patients with Congenital and Acquired Neurologic Disabilities: A Prospective Study
- 2013
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing. - 0893-2174. ; 26:6, s. 517-524
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To study the medium- to long-term outcome of implant treatment in patients with neurologic disabilities. Materials and Methods: Twenty-seven patients with different disabilities and in need of prosthodontic treatment were treated with various implant-supported prostheses. Altogether, 88 threaded titanium implants were placed. General anesthesia was used in 21 patients and local anesthesia in 6 patients. Patients were recalled every 3 months by a dental hygienist and annually by a prosthodontist. Results: Five of the original 27 patients died during the 5- to 10-year follow-up period (mean, 7.2 years), but the remaining 22 patients with 70 implants could be clinically examined at the final follow-up. Twelve implants (14%) were lost, 3 before loading and 9 after insertion of the implant-supported fixed prostheses. The cumulative survival rate for placed implants was 85.8% after 10 years. Perimucositis was diagnosed in 10 patients and for 14 of the 70 implants. Three of the 15 patients with measurable radiographs and 4 implants were diagnosed with peri-implantitis. Several prosthodontic complications occurred, from minor and easily correctable to severe and requiring retreatment. Conclusions: Patients with different neurologic disabilities present more problems during implant treatment and maintenance compared with healthy patients. Nevertheless, it was possible to carry out treatment, and outcomes were relatively favorable. The results indicate that implant treatment can be a valid option in oral rehabilitation of patients with neurologic disabilities.
|
|
| 31. |
|
|
| 32. |
- Eliasson, Alf, 1959, et al.
(författare)
-
A 5-year prospective clinical study of submerged and nonsubmerged Paragon system implants in the edentulous mandible.
- 2010
-
Ingår i: The International journal of prosthodontics. - : Quintessence. - 0893-2174 .- 1139-9791. ; 23:3, s. 231-8
-
Forskningsöversikt (refereegranskat)abstract
- PURPOSE: The aim of this investigation was to evaluate the clinical outcome of two different surgical protocols in the edentulous mandible: submerged and nonsubmerged. Further, the Paragon dental implant with a titanium plasma-sprayed surface was evaluated. MATERIALS AND METHODS: Twenty-nine consecutively treated patients with 168 implants supporting fixed prostheses were included. All but 3 patients were provided 6 implants, placed via nonsubmerged healing on one side and submerged healing on the other. Data were collected from patient records and radiographs. Twenty-four patients participated in the 5-year clinical follow-up examination. RESULTS: After 5 years, all patients still had their mandibular fixed prostheses in function. Cumulative survival rates were 100% for prostheses and 99.4% for implants. However, 3 implants fractured in 1 patient. One submerged implant was lost before loading but no further implants were lost during follow-up. The radiographic bone loss was small for all implants with a mean of 0.14 mm (standard deviation [SD]: 0.37) at 1 year and 0.42 mm (SD: 0.48) at 5 years for nonsubmerged implants and 0.17 mm (SD: 0.32) at 1 year and 0.51 mm (SD: 0.33) at 5 years for submerged implants. Nineteen implants (including the 3 that fractured) presented annual bone loss exceeding 0.2 mm after the first year, yielding a cumulative success rate of 86.2% after 5 years. CONCLUSION: Single-stage surgery was shown to have the same predictability as two-stage surgery in the anterior edentulous mandible. Paragon implants with a titanium plasma-sprayed surface showed a fracture rate of 2.2% and a success rate of 86.2% after 5 years.
|
|
| 33. |
- Falk, Anders, et al.
(författare)
-
Reliability of the impression replica technique
- 2015
-
Ingår i: International Journal of Prosthodontics. - : Quintessence. - 0893-2174 .- 1139-9791. ; 28:2, s. 179-180
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to evaluate the reliability of the impression replica technique with a four-unit zirconia fixed dental prosthesis (FOP). Marginal and internal fit were measured by repeatedly placing the FDP on an epoxy cast using light-body silicone material corresponding to cement. All measured marginal and internal fit points showed varying values. The greatest variations were seen at the most distal margin (33 mu m) and at the distal abutment of the FDP (77 mu m). The results showed that the technique gives moderate variations and is a useful method to evaluate marginal and internal fit.
|
|
| 34. |
- Falk, Anders, et al.
(författare)
-
Reliability of the Impression Replica Technique
- 2015
-
Ingår i: International Journal of Prosthodontics. - 0893-2174 .- 1139-9791. ; 28:2, s. 179-180
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to evaluate the reliability of the impression replica technique with a four-unit zirconia fixed dental prosthesis (FOP). Marginal and internal fit were measured by repeatedly placing the FDP on an epoxy cast using light-body silicone material corresponding to cement. All measured marginal and internal fit points showed varying values. The greatest variations were seen at the most distal margin (33 mu m) and at the distal abutment of the FDP (77 mu m). The results showed that the technique gives moderate variations and is a useful method to evaluate marginal and internal fit.
|
|
| 35. |
- Franco Tabares, Sebastian, et al.
(författare)
-
Limited Effect of Cement Material on Stress Distribution of a Monolithic Translucent Zirconia Crown: A Three-Dimensional Finite Element Analysis.
- 2018
-
Ingår i: The International journal of prosthodontics. - : Quintessence Publishing. - 0893-2174 .- 1139-9791. ; 31:1, s. 67-70
-
Tidskriftsartikel (refereegranskat)abstract
- The literature shows that the performance of densely sintered zirconia single crowns seems to be unaffected by the cement material. The purpose of this study was to evaluate the effects of various cement materials on the stress distribution in a monolithic translucent zirconia crown.A crown-cement-dentin complex was modeled. Six cements were evaluated: zinc phosphate, glass-ionomer, resin-modified glass-ionomer, dual-cure resin, calcium aluminate-based, and a theoretical or conceptual cement with mechanical properties close to those of dentin (ie, monoblock cement).While varying stress concentrations were found within the cements, the stress concentrations in the crown and dentin were consistent irrespective of cement material.Within the limitations of this study, it can be concluded that cement material had a negligible effect on stress distribution in the monolithic zirconia crown.
|
|
| 36. |
- Gardell, Emma, et al.
(författare)
-
Translucent Zirconium Dioxide and Lithium Disilicate : A 3-Year Follow-up of a Prospective, Practice-Based Randomized Controlled Trial on Posterior Monolithic Crowns
- 2021
-
Ingår i: International Journal of Prosthodontics. - : Quintessence. - 0893-2174 .- 1139-9791. ; 34:2, s. 163-
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To systematically evaluate and compare the clinical performance of lithium disilicate (LDS)and zirconium dioxide (ZrO2)-based ceramic monolithic crowns in the posterior dentition. Materials and Methods: Treatment was administered by two experienced general dental practitioners in two public dental health care clinics. Forty-four patients received 60 crowns randomized to be either LDS or ZrO2 and cemented with resin cement. Evaluations were performed after 3 years using California Dental Association criteria. Results: The mean follow-up time was 40 months (range: 31 to 50). No crown fractured during the observation time, and no chip-off fractures occurred. The success rate for ZrO2 was 80%, and the survival rate was 93.3%. For LDS, the success rate was 89.7%, and the survival rate was 100%. Survival after 3 years for all crowns together was 96.6%, and success was 84.7%. There was no significant difference between the two materials. Conclusion: Crowns made of monolithic translucent ZrO2 and LDS show equal and promising clinical results from a short-term perspective. There seems to be a difference between how patients and professionals rate crowns concerning esthetics (color and shape), with patients rating the restorations more favorably.
|
|
| 37. |
- Ghiasi, Peyman, et al.
(författare)
-
Implant and Prosthesis Failure Rates with Implant-Supported Maxillary Overdentures : A Systematic Review
- 2021
-
Ingår i: International Journal of Prosthodontics. - : Quintessence. - 0893-2174 .- 1139-9791. ; 34:4, s. 482-491k
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To assess the clinical outcomes of maxillary overdentures supported by dental implants by conducting a literature review. Materials and Methods: An electronic search was undertaken in March 2019. Eligibility criteria included publications reporting cases of implant-supported maxillary overdentures with follow-up information. Results: A total of 131 publications were included (1,478 overdentures supported by 6,681 implants). The mean number of attachments per overdenture was 3.8 ± 1.2 (range: 1 to 9), and a bar-clip system was used in about half of the cases. The prostheses were followed up for a mean of 47.9 ± 32.8 (range: 1 to 240) months. A total of 401 implants (6.0%) failed in 219 patients (14.8%), and 55 prostheses (3.7%) failed at a mean of 40.2 ± 53.2 (range: 6 to 240) months after placement. Most of the failures happened within the first year after placement for both implants (52.1%) and prostheses (41.8%). Patients with fewer implants per prosthesis presented higher prosthesis failure rates than patients with more implants per prosthesis. The cumulative survival rate for dental implants after 19 years was 70.4%, and for implant-supported maxillary overdentures was 79.8%. Presence of palatal coverage and/or metallic structure/reinforcement does not seem to have an influence on failure rate. Of the most commonly used attachment systems, the ball/O-ring and the Ceka were the ones with the highest rates of patients having at least one implant failure. Conclusion: Most of the prosthesis failures were due to loss of implants, and the first year was the most critical period for failures. The number of dental implants placed per patient seemed to have an impact on the occurrence of overdenture failure.
|
|
| 38. |
- Gjelvold, Björn, et al.
(författare)
-
Angled Screw Channel : An Alternative to Cemented Single-Implant Restorations-Three Clinical Examples
- 2016
-
Ingår i: International Journal of Prosthodontics. - : Quintessence. - 0893-2174 .- 1139-9791. ; 29:1, s. 74-76
-
Tidskriftsartikel (refereegranskat)abstract
- This article presents three cases of single labially tilted implants restored with screw-retained single crowns. Individualized abutments with an angled screw channel were used to avoid an unesthetic vestibular access channel. This individualized abutment allows the dentist and dental technician to use the screw-retained restorations where a cemented reconstruction would otherwise have been needed.
|
|
| 39. |
- Gjelvold, Björn, et al.
(författare)
-
Immediate Loading of Single Implants, Guided Surgery, and Intraoral Scanning: A Nonrandomized Study
- 2020
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing. - 0893-2174 .- 1139-9791. ; 33:5, s. 513-522
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To compare clinical and esthetic outcomes between immediately loaded single implants placed with and without a fully guided surgical procedure. Materials and Methods: Patients with a missing maxillary tooth (second premolar to second premolar) were considered for inclusion in this 1-year prospective nonrandomized study. Exclusion criteria were general health contraindications for oral surgery besides the need for bone grafting or ridge augmentation. One group received digital implant planning, fully guided surgery, and immediate loading (DIL). The other group received freehand surgery and immediate loading (IL). Outcome measures were implant survival, marginal bone loss, soft tissue changes, papilla index, pink and white esthetic scores (PES and WES, respectively), and patient-reported outcome measures (PROMs). Results: Two of 21 implants failed in the DIL group soon after placement, resulting in a 1-year implant survival rate of 90.5%, while no implants failed in the IL group. Significantly higher papilla index scores and lower soft tissue changes were found for the DIL group compared to the IL group. No differences were found after 1 year regarding marginal bone loss, PES, WES, or PROMs. Conclusion: Within the limitations of this study, immediate loading in combination with fully guided surgery might negatively affect implant survival. Immediate loading, fully guided surgery, and a digital workflow appear to have a positive effect on early soft tissue adaptation.
|
|
| 40. |
- Gonda, Tomoya, et al.
(författare)
-
Predictors of multiple tooth loss among socioculturally diverse elderly subjects
- 2013
-
Ingår i: International Journal of Prosthodontics. - 0893-2174 .- 1139-9791. ; 26:2, s. 127-134
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: This study identifies clinical factors that predict multiple tooth loss in a socioculturally diverse population of older adults.Materials and Methods: A total of 193 participants from English-, Chinese-, or Punjabi-speaking communities in Vancouver, British Columbia, with low incomes and irregular use of dental services were followed for 5 years as part of a clinical trial of a 0.12% chlorhexidine mouthrinse. The participants were interviewed and examined clinically, including panoramic radiographs, at baseline and annually for 5 years. Binary logistic regression was used to test the hypothesis that there was no difference between incidence of multiple (≥ 3) tooth loss in older people with various biologic, behavioral, prosthodontic, and cultural variables over 5 years.Results: Multiple tooth loss, which was distributed similarly among the groups in the trial, occurred in 39 (20%) participants over 5 years. The use of removable prostheses was the best predictor of loss, followed by the number of carious surfaces and number of sites with gingival attachment loss > 6 mm. The pattern of prediction was consistent across the three linguocultural groups.Conclusion: The use of removable dentures was the dominant predictor of multiple tooth loss in the three communities, but that tooth loss was not significantly associated with the cultural heritage of the participants.
|
|
| 41. |
- Gonda, Tomoya, et al.
(författare)
-
Predictors of multiple tooth loss among socioculturally diverse elderly subjects
- 2013
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing Company. - 0893-2174 .- 1139-9791. ; 26:2, s. 127-134
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: This study identifies clinical factors that predict multiple tooth loss in a socioculturally diverse population of older adults. Materials and Methods: A total of 193 participants from English-, Chinese-, or Punjabi-speaking communities in Vancouver, British Columbia, with low incomes and irregular use of dental services were followed for 5 years as part of a clinical trial of a 0.12% chlorhexidine mouthrinse. The participants were interviewed and examined clinically, including panoramic radiographs, at baseline and annually for 5 years. Binary logistic regression was used to test the hypothesis that there was no difference between incidence of multiple (≥ 3) tooth loss in older people with various biologic, behavioral, prosthodontic, and cultural variables over 5 years. Results: Multiple tooth loss, which was distributed similarly among the groups in the trial, occurred in 39 (20%) participants over 5 years. The use of removable prostheses was the best predictor of loss, followed by the number of carious surfaces and number of sites with gingival attachment loss > 6 mm. The pattern of prediction was consistent across the three linguocultural groups. Conclusion: The use of removable dentures was the dominant predictor of multiple tooth loss in the three communities, but that tooth loss was not significantly associated with the cultural heritage of the participants.
|
|
| 42. |
- Gunne, Johan, et al.
(författare)
-
Bone grafts and implants in the treatment of the severely resorbed maxillae : a 3-year follow-up of the prosthetic restoration.
- 1995
-
Ingår i: International Journal of Prosthodontics. - 0893-2174 .- 1139-9791. ; 8:1, s. 38-45
-
Tidskriftsartikel (refereegranskat)abstract
- Thirty patients with severely resorbed maxillae were treated in a one-stage procedure using bone graft and implant placement. A horseshoe-shaped bone graft was taken from the iliac wing and fixed to the residual maxillary ridge using titanium implants, which supported the prostheses placed after a 6-month healing period. The material constituted two groups: a development group, the first 10 patients; and a routine group, the following 20 patients. At the 3-year follow-up, the implant survival was 87.5% and the prosthesis stability was 100% in the routine group. The probing depth did not change during the follow-up period, while the grafted region decreased in volume during the first postoperative year. The patients reported improved chewing ability and improved life quality. Very few technical and prosthodontic complications occurred.
|
|
| 43. |
- Gunne, Johan, et al.
(författare)
-
Implant treatment in partially edentulous patients: a report on prostheses after 3 years.
- 1994
-
Ingår i: The International journal of prosthodontics. - 0893-2174. ; 7:2, s. 143-8
-
Tidskriftsartikel (refereegranskat)abstract
- There has been an increasing interest in the use of implants for partially edentulous patients. This introduces other biomechanical situations than those experienced in completely edentulous patients. In a prospective multicenter study, 521 implants in 154 patients were loaded with 197 free-standing prostheses. The patients have been followed for 3 years. The cumulative success rate for the prostheses was 94.8% and for the implants it was 93.9%. Most of the lost prostheses were only supported by two implants. A frequent technical complication was fracture and loosening of gold screws, which was more frequent in prostheses supported by only two implants.
|
|
| 44. |
|
|
| 45. |
|
|
| 46. |
- Helldén, Leif, et al.
(författare)
-
A prospective 5-year multicenter study of the Cresco implantology concept
- 2003
-
Ingår i: International Journal of Prosthodontics. - 0893-2174 .- 1139-9791. ; 16:5, s. 554-562
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- PURPOSE: The purpose of this study was to investigate the clinical and radiographic outcome of a prospective 5-year longitudinal multicenter test of a simplified implantology concept comprising an abut-ment-free implant system (Cresco) and a new method for fabrication of passively fitting superstructures, the Cresco Ti Precision method. MATERIALS AND METHODS: The tests were carried out at three different centers. Sixty partially or completely edentulous patients were restored by fixed implant-supported superstructures fabricated according to the Cresco Ti Precision method. In all, 215 Cresco implants were placed for the support of the superstructures. For various reasons, eight patients (13%) could not be followed through the 5 years. The radiographic measurements were recorded from radiographs exposed perpendicular to the implants. RESULTS: The initial implant failure rate (during the healing phase) was 2%, and the survival rate after loading was 98%. The mean peri-implant bone loss was 0.29 mm (SD 0.57). Of the measured sites, 71% showed a crestal bone loss of less than 0.5 mm. Very few mechanical complications were observed. This was attributed to the passively fitting superstructures. CONCLUSION: The results from the present multicenter test demonstrated that the abutment-free Cresco implantology concept is a reliable alternative method for implant-supported fixed prosthetic rehabilitation of edentulous and partially edentulous jaws.
|
|
| 47. |
- Henriksson, Kristina, et al.
(författare)
-
Evaluation of custom-made procera ceramic abutments for single-implant tooth replacement: a prospective 1-year follow-up study.
- 2003
-
Ingår i: The International journal of prosthodontics. - 0893-2174. ; 16:6, s. 626-30
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The aim of this study was to evaluate the clinical performance of customized ceramic single-implant abutments in combination with two different techniques for fabricating crowns. MATERIALS AND METHODS: Twenty consecutive patients were provided with 24 single-implant restorations with customized ceramic abutments. The restorations were either cemented to the abutment (n = 13) or fabricated with the veneering material fused directly onto the ceramic abutment (n = 11). The patients were evaluated at 6 and 12 months with radiographs and clinical parameters for complications and soft tissue response. RESULTS: All implants and restorations were still in function after 1 year. Few clinical problems were reported during the follow-up period. The interproximal soft tissue recovered to near normal size. The mean marginal bone loss was similar for both groups, reaching an average of 0.3 mm (SD 0.71) after 1 year in function. CONCLUSION: The short-term results indicate that customized ceramic abutments are successful and have comparable function, regardless of fabrication method.
|
|
| 48. |
- Hjalmarsson, Lars, et al.
(författare)
-
Implant-Level Prostheses in the Edentulous Maxilla : A Comparison with Conventional Abutment-Level Prostheses After 5 Years of Use
- 2011
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing Co. - 0893-2174 .- 1139-9791. ; 24:2, s. 158-167
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: Long-term comparisons of frameworks at the implant or abutment level are not available, and knowledge of the clinical function of cobalt-chromium (Co-Cr) alloy frameworks is limited. Primarily, the aim of this study was to compare the 5-year clinical performance of frameworks with or without abutment connections to implants. Secondly, the outcomes of prostheses made from Co-Cr alloy with porcelain veneers to those made of commercially pure titanium (CP Ti) with acrylic veneers were compared.Materials and Methods: The test groups comprised patients treated with screw-retained fixed prostheses made at the implant level according to the Cresco method in either dental porcelain–veneered Co-Cr alloy (n = 15) or acrylic-veneered CP Ti (n = 25). A control group of 40 randomly selected patients were provided with prostheses made at the standard abutment level in CP Ti with acrylic veneers. For all patients, clinical and radiologic 5-year data were retrospectively collected and evaluated.Results: Five-year implant cumulative survival rates (CSRs) were 98.6% and 97.6% for test and control groups, respectively (P > .05). No major differences in bone level were demonstrated between the groups after 5 years (P > .05). Significantly more complications occurred in the test groups compared to the control group (P < .01), with the most common complications being mucositis and fracture of veneers.Conclusions: After 5 years, the clinical outcomes of implant-level prostheses made of porcelain-veneered Co-Cr or acrylic-veneered CP Ti seem comparable to acrylic-veneered titanium prostheses made at the standard abutment level regarding implant CSR and bone levels. However, more complications were registered in implant-level prostheses compared to the standard abutment-level prostheses.
|
|
| 49. |
|
|
| 50. |
- Holm, Charlotta, et al.
(författare)
-
Longevity and quality of FPDs: a retrospective study of restorations 30, 20, and 10 years after insertion.
- 2003
-
Ingår i: International Journal of Prosthodontics. - 0893-2174. ; 16:3, s. 283-9
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The aim of this retrospective study was to investigate the longevity and clinical performance of fixed partial dentures (FPD) 30, 20, and 10 years after insertion. MATERIALS AND METHODS: A total of 289 FPDs were inserted in 1966/67, 1976/77, and 1986/87. For patients with FPDs presumably still in function, an evaluation according to the CDA criteria was made. RESULTS: For 64 of the FPDs (22%), no information was available. Seventy-nine patients with 94 FPDs (33%) were clinically examined, and 44 of the FPDs (15%) were reported to be still in function by the patients' current clinicians. The remaining 87 FPDs (30%) were considered lost to follow-up. These FPDs had either been removed for various reasons--in most cases dental caries, lost retention, or fractured abutment teeth--or the patient could not be contacted. Eighty-four percent of the FPDs inserted in 1966/67 were still in function after 20 years, compared to 64% of those inserted in 1976/77. Apart from an increase in wear and discoloration, the oldest FPDs had excellent marginal fit and anatomic shape. CONCLUSION: The survival rate of 30-year-old FPDs was high; 53% remained in function after 30 years. Based on the CDA criteria, 78% of the restorations were rated satisfactory in all subgroups. The FPDs placed in 1966/67 obtained the highest ratings in color, anatomy, and margin integrity.
|
|
