| 31. |
- Hjalmarsson, Lars, 1958, et al.
(författare)
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Precision of fit to implants: a comparison of Cresco™ and Procera® implant bridge frameworks.
- 2010
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Ingår i: Clinical implant dentistry and related research. - : Wiley. - 1708-8208 .- 1523-0899. ; 12:4, s. 271-80
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Tidskriftsartikel (refereegranskat)abstract
- The Cresco™ (Astra Tech AB, Mölndal, Sweden) method aims to reduce the inevitable distortions when cast metal frameworks for implant-supported prostheses are fabricated. However, limited data are available for the precision of fit for this method.
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| 32. |
- Hogenius, S, et al.
(författare)
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Demographical, odontological, and psychological variables in individuals referred for osseointegrated dental implants.
- 1992
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Ingår i: Community dentistry and oral epidemiology. - 0301-5661. ; 20:4, s. 224-8
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Tidskriftsartikel (refereegranskat)abstract
- Edentulism and/or the wearing of a removable denture always requires adaptation, not only on a functional, but also on an emotional, level. Four hundred and seventy-three patients referred for treatment with osseointegrated implants due to problems with removable prostheses entered the study and 315 (66.6%) completed it. The average age was close to 60 yr, and the majority of patients were women. The average time of edentulousness was 14.3 yr. Twelve percent experienced profound negative effects from wearing dentures, this to an extent that it led to overt psychological and social effects. Subjective ratings revealed that functional and/or intra-personal effects were of higher significance than social consequences. The group was found to be more depressed than average as well as having an external health locus of control orientation.
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| 33. |
- Hultin, M., et al.
(författare)
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Oral Rehabilitation of Tooth Loss: A Systematic Review of Quantitative Studies of OHRQoL
- 2012
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Ingår i: International Journal of Prosthodontics. - : Quintessence. - 0893-2174 .- 1139-9791. ; 25:6, s. 543-552
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: This study aimed to review published quantitative studies for evidence regarding the influence of oral rehabilitation following total or partial tooth loss on self-perceived oral health-related quality of life (OHRQoL). Materials and Methods: Three databases were searched using specified indexing terms. The reference lists of relevant publications were also searched manually. Quality of evidence was classified according to GRADE guidelines as high, moderate, low, or very low. Results: The search yielded 2,138 titles and abstracts, 2,102 of which were of a quantitative study design. Based on pre-established criteria, the full-text versions of 322 articles were obtained. After data extraction and interpretation, 5 publications of high or moderate study quality remained. The results of these 5 studies showed positive effects of oral rehabilitation on OHRQoL. Two studies showed substantial improvements. Conclusions: This is a relatively new field of research; there are very few quantitative studies of how patients perceive OHRQoL following tooth loss and subsequent rehabilitation. While this review indicates that treatment has positive effects on quality of life, the scientific basis is insufficient to support general conclusions about the influence of various interventions on the OHRQoL of patients who have experienced total or partial tooth loss. To achieve a more comprehensive analysis, it is recommended that future studies be based on a combination of quantitative and qualitative methods, ie, questionnaires and semi-structured interviews. The follow-up period must also be appropriate for the specific intervention studied.
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| 34. |
- Jemt, Torsten, 1950, et al.
(författare)
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A 3-year follow-up study on single implant treatment.
- 1993
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Ingår i: Journal of dentistry. - 0300-5712. ; 21:4, s. 203-8
-
Tidskriftsartikel (refereegranskat)abstract
- The purpose of this study was to investigate restorative and postinsertion problems in patients provided with single implant supported restorations. Fifty consecutive single implant patients were reviewed over a period of 3 years following placement of artificial crowns. One (1.4%) of the 70 inserted implants was lost during the follow-up period, which gives a cumulative success rate of 98.5%. The most frequent complication was loosening of the single tooth abutment screw. This problem was associated with fistulas during the first year of clinical service. A more severe complication was that three adjacent teeth had to be endodontically treated due to accidental devitalization from surgical trauma during implant insertion. The mean marginal bone level adjacent to the implants was reduced 0.5 mm from crown insertion to the third annual review.
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| 35. |
- Jemt, Torsten, 1950, et al.
(författare)
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A 5-year prospective multicenter follow-up report on overdentures supported by osseointegrated implants.
- 1996
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Ingår i: The International journal of oral & maxillofacial implants. - 0882-2786. ; 11:3, s. 291-8
-
Tidskriftsartikel (refereegranskat)abstract
- This report presents the results of a 5-year prospective multicenter study including nine centers worldwide. A total of 30 patients received 117 Brånemark implants in the maxillae, and 103 patients received 393 implants in the mandibles. According to the protocol, all integrated maxillary implants were to be loaded; however, only two of four mandibular implants were planned for support of the overdentures, leaving the remaining implants covered by mucosa as backup for possible implant failures. Thirty-five patients (26.3%) who were provided with 127 implants (24.9%) were withdrawn from the study. Six patients treated in the maxilla lost all their implants and resumed wearing complete dentures. The cumulative success rates for implants and for overdentures supported by two implants in the edentulous mandible were 94.5% and 100%, respectively. The corresponding cumulative success rates for implants and for overdentures supported by an optimal number of implants in the maxilla were 72.4% and 77.9%, respectively. Significantly better jawbone characteristics at the time of implant surgery were considered to contribute to the better cumulative success rates in the mandibles. Mean marginal bone loss was 0.8 mm (SD 0.8) and 0.5 mm (SD 0.8) for loaded implants during a 5-year period of time in the maxillae and mandibles, respectively. Measurements of the clinical height of the abutment cylinders indicated a mean recession (0.2 mm) of peri-implant mucosa during the follow-up period in the mandibles. Conversely, hyperplasia was observed in the maxillae.
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| 36. |
- Jemt, Torsten, 1950, et al.
(författare)
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A comparison of laser-welded titanium and conventional cast frameworks supported by implants in the partially edentulous jaw: a 3-year prospective multicenter study.
- 2000
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Ingår i: The International journal of prosthodontics. - 0893-2174. ; 13:4, s. 282-8
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The purpose of this prospective multicenter study was to evaluate and compare the clinical performance of laser-welded titanium fixed partial implant-supported prostheses with conventional cast frameworks. MATERIALS AND METHODS: Forty-two partially edentulous patients were provided with Brånemark system implants and arranged into 2 groups. Group A was provided with a conventional cast framework with porcelain veneers in one side of the jaw and a laser-welded titanium framework with low-fusing porcelain on the other side. The patients in group B had an old implant prosthesis replaced by a titanium framework prosthesis. The patients were followed for 3 years after prosthesis placement. Clinical and radiographic data were collected and analyzed. RESULTS: Only one implant was lost, and all prostheses were still in function after 3 years. The 2 framework designs showed similar clinical performance with few clinical complications. Only one abutment screw (1%) and 9 porcelain tooth units (5%) fractured. Four prostheses experienced loose gold screws (6%). In group A, marginal bone loss was similar for both designs of prostheses, with a mean of 1.0 mm and 0.3 mm in the maxilla and mandible, respectively. No bone loss was observed on average in group B. No significant relationship (P > 0.05) was observed between marginal bone loss and placement of prosthesis margin or prosthesis design. CONCLUSION: The use of laser-welded titanium frameworks seems to present similar clinical performance to conventional cast frameworks in partial implant situations after 3 years.
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| 37. |
- Jemt, Torsten, 1950
(författare)
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A retro-prospective effectiveness study on 3448 implant operations at one referral clinic: A multifactorial analysis. Part I: Clinical factors associated to early implant failures
- 2017
-
Ingår i: Clinical Implant Dentistry and Related Research. - : Wiley. - 1523-0899. ; 19:6, s. 980-988
-
Tidskriftsartikel (refereegranskat)abstract
- BackgroundLimited numbers of large effectiveness studies on routine dental implant treatment are available in the literature. PurposeTo report retro-prospective data on prevalence of early implant failures in a large number of routine patients/operations at 1 referral clinic. Materials and methodsA total of 2848 patients were consecutively provided with 9582 implants with an anodized surface (Nobel Biocare AB) during 3448 implant operations between 2003 and 2011. All patients were invited to a follow-up program and early implant failures up to first annual examination were consecutively identified. A logistic multivariate data analysis was performed to identify possible factors with an association to early implant failures. ResultsA total of 43, 73, and 81 implant operations were denoted as early failures depending on when cut-off time was defined, using: abutment connection, prosthesis placement, or at first year of follow-up, respectively. Five factors showed significant association to early implant failures, where the highest risk for a failure was associated to surgeon (hazard ratio [HR] 5.13), followed by not prosthetic treatment at the referral clinic (HR 2.71). When all 5 significant factors were present, the risk for an early failure after an operation was 7.0%, and the risk decreased to 0.1% when none/lowest risk factors were present. ConclusionsThe role of the surgeons/dentists involved in the rehabilitation of the implant patients and numbers of placed implants (degree of tooth loss) showed the strongest associations to early implant failures in the present clinic. Also increased bone resorption was associated to increased risk for implant failure.
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| 38. |
- Jemt, Torsten, 1950
(författare)
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A retro-prospective effectiveness study on 3448 implant operations at one referral clinic: A multifactorial analysis. Part II: Clinical factors associated to peri-implantitis surgery and late implant failures
- 2017
-
Ingår i: Clinical Implant Dentistry and Related Research. - : Wiley. - 1523-0899. ; 19:6, s. 972-979
-
Tidskriftsartikel (refereegranskat)abstract
- BackgroundLittle knowledge is available on implant treatment in large effectiveness studies in routine practice. PurposeTo report retro-prospective data on prevalence of peri-implantitis surgery and late implant failures in a large number of routine patients at 1 referral clinic. Materials and methodsAltogether 9582 implants with an anodized surface (Nobel Biocare AB) were consecutively placed between 2003 and 2011 and followed-up to end of 2015. All peri-implantitis operations and late implant failures were consecutively identified. A logistic multivariate data analysis was performed to identify association between the complications and different clinical factors. Furthermore, data on prevalence on risk for inflammation and bone loss at implants (peri-implantitis) and surgery related to peri-implantitis was collected for another reference group of about 10000 implant patients during 3 consecutive years (2013-2015). ResultsCumulative survival rates for implant operations without peri-implantitis surgery or implant failures were calculated to 96.4% (95% CI: 97.3-95.4) and 95.0% (95% CI: 96.0-94.1) after 10 years, respectively. Risk for peri-implantitis surgery showed a significant association (P<.05) to number of placed implants (hazard ratio [HR] 1.40; 95% CI: 1.24-1.59). Three factors showed significant association to risk for late implant failures, where treatment in lower jaw had the highest risk; HR 2.03. Overall implant failures were associated to 4 significant factors where surgeon (HR 2.50) showed highest impact on risk. Numbers of implants and bone resorption at surgery were the 2 significant factors that were consistent for all the time periods of failures during follow-up (early/late/total). On an average 7.4% of examined patients in the reference group were denoted with highest risk group (peri-implantitis) of which on an average 12.7% of these patients had surgery related to peri-implantitis. ConclusionsThe dentist involved in the surgical and prosthetic rehabilitation of the implant patients, number of implants and degree of bone resorption seem to have most impact on overall implant complications and failures in the present patient group.
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| 39. |
- Jemt, Torsten, 1950, et al.
(författare)
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A retrospective study on 1592 consecutively performed operations in one private referral clinic. Part II: Peri-implantitis and implant failures
- 2017
-
Ingår i: Clinical Implant Dentistry and Related Research. - : Wiley. - 1523-0899. ; 19:3, s. 413-422
-
Tidskriftsartikel (refereegranskat)abstract
- BackgroundFew large-scale follow-up studies are reported on routine implant treatment. PurposeTo report retrospective data on peri-implantitis and overall implant failures at one private referral clinic (effectiveness study). Materials and MethodsA total of 1017 patients were consecutively provided with 3082 implants with an anodized surface during 1592 operations between 2000 and 2011. All patients with any of four events of problems were identified; peri-implantitis, surgery related to peri-implantitis, overall implant failure, and late implant failures. A logistic multivariate analysis was performed to identify possible factors with association to the four events. ResultsLower jaw surgery (HR=3.03) and immediate gingival grafting at implant surgery (HR=3.34) were factors with the highest risk associated to the two peri-implantitis events, respectively. Risk of peri-implantitis increased by year of inclusion from year 2000 (HR=1.28). Overall implant failures were associated to smoking (HR=2.11), surgical technique (highest for direct placement; HR=1.67), and type of implant (NobelActive CC; HR=2.48). NobelActive CC was more used in upper jaws, using immediate or one-stage surgery with bone and mucosa grafting procedures than other implants (P<.05). Implants lost after first year only showed an association to lower jaw (HR=2.63) and early inflammation (HR=17.95). ConclusionPeri-implantitis seem to be associated to surgical protocols more often in the posterior lower jaw in routine practice. The problems seem to increase during the inclusion period, possibly related to increased use of direct implant placement technique and grafting protocols. Early inflammatory problems have in the previous report on the present patient group been associated to the mid-aged patient. Overall/late implant failures were shown to be associated to earlier inflammatory problems, smoking habits, surgical technique, and treatment in the posterior lower jaw.
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| 40. |
- Jemt, Torsten, 1950, et al.
(författare)
-
Associations Between Early Implant Failure, Patient Age, and Patient Mortality: A 15-Year Follow-Up Study on 2,566 Patients Treated with Implant-Supported Prostheses in the Edentulous Jaw
- 2017
-
Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing. - 0893-2174. ; 30:2, s. 189-197
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: The aim of this study was to report the distribution of patients with early implant failures after implant treatment in the edentulous jaw with regard to age at surgery and association with patient mortality over a 15-year period. Materials and Methods: All consecutively treated patients treated in the edentulous jaw at a single specialist clinic from 1986 to 1997 were included and followed up for 1 year for implant failures and for 15 years with regard to patient mortality. Patients were arranged into age groups, and life tables for patients and reference groups of patients with comparable age (based on national population data) were calculated. Log rank test was used to test differences in patient survival between those with reported early implant failures and those with no early failures. Mantel-Haenszel chi-square test was used to test association between proportions of implant failures and age groups. Results: A total of 55 patients were excluded because they were not living in Sweden (nonresidents/emigrated). Altogether, 2,566 patients were included, with a mean age of 65 years (SD: 11). Of these, 988 patients were deceased during the 15 years of followup (38%), and 291 presented an early implant failure (11.3%), most of them before prosthesis placement (72%). Patients with early implant failures presented higher mortality rates than patients with no failures (P < .05), and failure rates decreased consistently from younger to higher age groups (P < .05). Conclusion: Patients in the younger age groups showed an increased mortality compared with the reference group (P < .05) and a higher prevalence of early failures compared with older patients (P < .05). Older patients showed an opposing pattern of lower mortality compared with reference groups of comparable age (P < .05), but both younger and older patients with early failures showed a higher mortality compared to patients with no failures (P < .05).
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