| 21. |
- Friberg, Bertil, 1950, et al.
(författare)
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Rehabilitation of edentulous mandibles by means of turned Brånemark System implants after one-stage surgery: a 1-year retrospective study of 152 patients.
- 2005
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Ingår i: Clinical implant dentistry and related research. - 1523-0899. ; 7:1, s. 1-9
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Rehabilitation of the edentulous mandible with oral implants is today predominantly executed with one-stage surgery and early or immediate loading. It is generally claimed that the outcome is similar to that of the classic two-stage technique. PURPOSE: The aim of the present investigation was to retrospectively evaluate the 1-year results of one-stage surgery and early loading performed in edentulous mandibles in a large group of patients. The outcome was compared with that of a study, from the same clinic (control), that used the two-stage surgical technique in edentulous mandibles and whose data were well controlled. MATERIALS AND METHODS: The study included 152 individuals with 750 turned Brånemark System implants of various designs placed in edentulous mandibles by means of one-stage surgery. The prosthetic procedure was commenced at a mean of 13 days after the surgical intervention. Intraoral apical radiography was performed at the time of prosthesis placement and at the 1-year annual checkup. Comparison of failure rates between the test and the control groups was made by means of the chi-square test. RESULTS: A total of 18 implants in 12 patients in the study group were found to be mobile up to and including the first annual checkup, equivalent to a 1-year implant cumulative survival rate (CSR) of 97.5%. The corresponding CSR for the control group was 99.7%. Differences between the two groups in regard to implant survival reached significant levels when analyzed with the chi-square test (p < .05). No such significant difference was seen on the patient level (p > .05). Because of implant failures one prosthesis in the study group was remade. The mean marginal bone resorption during the first year of function was 0.4 mm in both groups. CONCLUSIONS: The present investigation showed a high but (compared with the classic two-stage technique) somewhat lower CSR after 1 year for the one-stage technique. More prosthetic adjustments due to implant failures were observed in the study group, and the results emphasize the need for large study samples in order to statistically verify small differences between various treatment techniques.
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| 22. |
- Friberg, Bertil, 1950, et al.
(författare)
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Soft Tissue Augmentation in Connection to Dental Implant Treatment Using a Synthetic, Porous Material - A Case Series with a 6-Month Follow-Up.
- 2012
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Ingår i: Clinical implant dentistry and related research. - : Wiley. - 1708-8208 .- 1523-0899. ; 14:6
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Tidskriftsartikel (refereegranskat)abstract
- Background: Bony defects/concavities in the aesthetic zone of maxillae may interfere with the results of prosthetic procedures by producing shading superior to the crown. Such regions can be augmented either by bone or soft tissue autografts, allografts, or xenografts. Tissue shrinkage is thus anticipated, and a method to objectively measure the tissue change is valuable. Purpose: The aim of this study was to evaluate the use of a synthetic, porous material made of polyurethaneurea for buccal soft tissue augmentation in connection with implant placement in the maxillary front region. Further, to measure over time the change in buccal contour using a computerized technique. Materials and Methods: Ten patients received 12 Artelon® cylinders (5 × 10 mm) in connection to implant placement. Preoperative and postoperative (at 3 and 6 months) study casts were obtained for computer measurements, using the preoperative reference model as a base. The volume created between the surfaces of the reference model and each of the two following superimposed models was measured in cubic millimeter. Differences in volume from pretreatment to 3 and 6 months, respectively, were compared. Results: The clinical observation during follow-up showed normal healing. The increase in mean buccal tissue volume was 50 mm(3) (SD 18) after 3 months and 43 mm(3) (SD 21) after 6 months, measured over a 6 mm × 8 mm area in the maxillary front region, in comparison to before insertion of the cylinder. The reduction from 3 to 6 months was not statistically significant (p = .17). Conclusion: A synthetic, porous material for soft tissue augmentation was tested in connection to implant placement in the aesthetic zone of maxillae. The buccal contour was followed-up for 6 months using a computer volumetric technique on preoperative and postoperative study casts. Measured tissue volume showed an obvious increase during the study period. The material was biologically well received.
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| 23. |
- Friberg, Bertil, 1950, et al.
(författare)
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Turned Brånemark System R implants in wide and narrow edentulous maxillae: A retrospecitve clinical study
- 2008
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Ingår i: Clinical Implant Dentistry and Related Research. - : Wiley. - 1708-8208 .- 1523-0899. ; 10:2, s. 78-85
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Tidskriftsartikel (refereegranskat)abstract
- Background: The available jaw bone volume is regarded one most important factor when assessing the prognosis of oral implants in the rehabilitation of the edentulous maxilla. Purpose: The aim of the current investigation was to retrospectively evaluate and compare the outcome of implants placed in edentulous maxillae with either wide or narrow jaw shapes. The marginal bone loss and implant cumulative survival rates (CSRs) were calculated and analyzed with special reference to smoking habits. Materials and Methods: The study included 75 individuals with edentulous maxillae, of which 33 patients exhibited wide (Group A) and 42 patients exhibited narrow jaw shapes (Group B). A total of 506 turned Brånemark System R implants were inserted (226 in Group A and 279 in Group B) and followed clinically up to 7 years. Smoking habits were recorded. Radiographs were obtained at connection of prostheses and at the 1- and 5-year follow-up visit. The marginal bone loss was calculated for the groups and analyzed using Student's t-test. Results: Twenty-eight implants were lost during the study period, revealing implant cumulative survival rates at 7 years of 94.6% (11/226) and 93.6% (17/279) for wide and narrow crests, respectively. No difference in marginal bone loss was seen between the two groups, although a trend towards more bone loss was recorded for patients with wide crests. Smoking habits were more common in Group A (45%) than in Group B (31%). During the first year of function smokers lost significantly more marginal bone than non-smokers (p=0.0447), albeit this difference did not prevail (p>0.05) at the end of the study period. Conclusions: The implant cumulative survival rates at 7 years were equally good for the two groups of patients with various jaw shapes. Initially smokers showed significantly more marginal bone loss than non-smokers.
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| 24. |
- Gunne, Johan, et al.
(författare)
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Implant treatment in partially edentulous patients: a report on prostheses after 3 years.
- 1994
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Ingår i: The International journal of prosthodontics. - 0893-2174. ; 7:2, s. 143-8
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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.
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| 25. |
- Gupta, A., et al.
(författare)
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Rehabilitation of Edentulism and Mortality: A Systematic Review
- 2019
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Ingår i: Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry. - : Wiley. - 1059-941X. ; 28:5, s. 526-535
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Tidskriftsartikel (refereegranskat)abstract
- Purpose It has been shown that tooth loss is associated with an increased risk of early mortality, and that prosthetic rehabilitation of edentulism improves quality of life and reduces morbidity. This review examines association between prosthetic rehabilitation of the edentulous state with a complete denture and mortality. Methods A systematic search using combinations of related keywords for "complete denture" and "mortality" was performed on PubMed, Web of Science, and Google Scholar. A reference search of included articles and author contacts was also performed. Results None of the studies reported results for association between mortality and wearing complete dentures among edentulous individuals; however, based on the published methods and results, a total of 15 studies were found to be eligible for author contacts to obtain relevant data. Overall, 5 eligible studies were included and critically evaluated to summarize their findings. The follow-up period in these studies ranged from 3 to 24 years, and the age group of included samples ranging from 52 to 105 years. The proportion of individuals not wearing dentures ranged from 3.0% to 13.3%. Four of the included studies showed fewer individuals without complete dentures surviving over the follow-up years as compared to the group wearing complete dentures. One of two studies that could adjust for certain confounders found no significant difference in mortality after adjusting, but another study found a 42% reduced risk of dying among those wearing complete dentures, as compared to those not wearing complete dentures after adjusting for age, sex, educational level, smoking, alcohol drinking, body mass index, time spent walking daily, medical history, psychological distress score, energy intake, and protein intake. Due to the small sample size of nondenture wearers, it was not possible to analyze with statistical rigor the comparative risk of dying associated with wearing or not wearing complete dentures. Conclusion Most of the included studies indicated a higher proportion of deceased edentulous patients not using dentures as compared to denture wearers. Nevertheless, small sample size prevents a definite conclusion being drawn regarding a relationship between prosthetic rehabilitation and mortality among edentulous individuals.
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| 26. |
- Hall, Jan, et al.
(författare)
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A controlled clinical exploratory study on genetic markers for peri-implantitis
- 2011
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Ingår i: EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY. - 1756-2406. ; 4:4, s. 371-382
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The objective of this controlled exploratory cross-sectional study was to investigate and compare the presence of gene expression of bone resorption/remodelling in peri-implant crevicular fluid samples from healthy subjects and subjects showing obvious clinical and radiographic signs of peri-implantitis. Materials and methods: Peri-implant crevicular fluid (PICF) was sampled from seven healthy subjects and seven subjects with obvious clinical signs of peri-implantitis using paper points. The samples were analysed by quantitative polymerase chain reaction (qPCR). Biomarkers associated with bone degradation/remodelling, such as tartrate-resistant acid phosphatase (TRAP), dickkopf-related protein-1 (DKK-1), osteoprotegerin (OPG), cathepsin K (CatK) and osteocalcin (OC), were of particular interest in the study. Results: The measured levels of genetic markers were similar for the subjects in the healthy and the peri-implantitis group. Only one subject out of seven with strong and clear clinical signs of peri-implantitis exhibited a panel of genetic markers for ongoing bone degradation. This subject was also diagnosed with rheumatoid arthritis. Conclusion: The present data showed that patients with obvious clinical signs of peri-implantitis and a history of bone loss can exhibit similar gene expressions of bone loss/remodelling as clinically healthy implant patients. Absence of bone resorption markers demonstrated that it was not possible to establish ongoing bone degradation in six of seven subjects in the peri-implantitis group. The results suggest that bone resorption was not in progress at the time of PICF sampling, or that cells expressing such markers were not present in significant numbers at the site of PICF sampling.
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| 27. |
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| 28. |
- Henriksson, Kristina, et al.
(författare)
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Evaluation of custom-made procera ceramic abutments for single-implant tooth replacement: a prospective 1-year follow-up study.
- 2003
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Ingår i: The International journal of prosthodontics. - 0893-2174. ; 16:6, s. 626-30
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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.
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| 29. |
- Henriksson, Kristina, et al.
(författare)
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Measurements of soft tissue volume in association with single-implant restorations: a 1-year comparative study after abutment connection surgery.
- 2004
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Ingår i: Clinical implant dentistry and related research. - 1523-0899. ; 6:4, s. 181-9
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Patients with buccal defects due to tooth extraction seem to regain some of the contour at the time of abutment surgery and connection of single-implant crown restorations. It can then be assumed that different abutment systems could restore the buccal contour to different degrees. PURPOSE: To measure changes in buccal tissue volume after placing restorations with single-implant crowns using two different abutment systems and to measure soft tissue change during the 1 year after single-implant treatment. MATERIALS AND METHODS: Eighteen patients were provided with single-implant restorations in the central incisor area. Nine patients in each group were treated with single-implant crowns supported by either CeraOne abutments (Nobel Biocare AB, Göteborg, Sweden) or customized Procera ceramic abutments (Nobel Biocare AB). Study casts were made before abutment connection, at crown placement, and after 1 year. After the casts were scanned, they were analyzed with a computer, using the model before abutment as a reference. In the area of the single implant, sagittal projections provided images of the models that allowed measurements between the contours at the different situations. Radiography and photography for measuring papillary volume were also performed. RESULTS: All patients exhibited increased "buccal volume" after abutment connection and crown placement (p < .01). A trend to greater increase was observed for the Procera group. Both groups also showed a reduction of buccal tissue 1 year later (p < .05-.01), leaving on average more volume in the Procera group. The papillae recovered spontaneously, and no relationship was observed between the presence of papilla and underlying bone support (p > .05). CONCLUSIONS: The buccal tissue increased significantly after placement of the abutment cylinder and the implant crown. This increase of buccal contour was reduced after 1 year. Furthermore, no relationship was established between the presence of papillae and the distance between the contact point and the underlying bone crest.
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| 30. |
- Henry, Patric, et al.
(författare)
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Osseointegrated implants for single-tooth replacement: a prospective 5-year multicenter study.
- 1996
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Ingår i: The International journal of oral & maxillofacial implants. - 0882-2786. ; 11:4, s. 450-5
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Tidskriftsartikel (refereegranskat)abstract
- One hundred seven Brånemark implants were placed in 92 patients participating in an international multicenter trial on single-implant restorations at seven centers. The patients were followed for 5 years in a prospective study focusing on implant success and crown function. Plaque and gingival indexes, as well as probing depths, were recorded around teeth and implants. The marginal bone level at implants was determined from intraoral radiographs. Only three implants (2.8%) had been lost at the final annual checkup. During the follow-up period, a total of 17 patients dropped out or were excluded because of nonconformity with the protocol. Based on the remaining patients, a total of 86 implants were clinically and radiographically evaluated at the 5-year follow-up period, resulting in a cumulative success rate of 96.6% (71 implants) in the maxillae and 100% (15 implants) in the mandibles. Plaque and gingival indexes showed a similar pattern of good health around both natural teeth and titanium abutments. The marginal bone loss during the 5-year period did not exceed 1 mm as a mean for all implants analyzed. The most frequent complication recorded during the follow-up was loosening of the abutment fixation screw. The outcome of this study indicated that safe and highly predictable results can be obtained for 5 years when Brånemark implants are used to support single-tooth restorations.
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