| 81. |
- Jemt, Torsten, 1950
(författare)
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Single-Implant Survival: More Than 30 Years of Clinical Experience
- 2016
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Ingår i: International Journal of Prosthodontics. - : Quintessence Publishing. - 0893-2174. ; 29:6, s. 551-558
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The aim of this study was to report long-term clinical survival of single implants provided with turned and moderately rough surfaces in routine practice. Materials and Methods: All patients consecutively treated at a specialist center with single-crown implants from 1982 to 2013 were included. For all these patients, data on implant failure and last examination at the clinic were collected, and thereafter cumulative survival rates (CSR) were calculated for patients treated in the maxilla or mandible with turned or moderately rough surfaces, respectively. Results: In total, 2,417 patients (2,665 operations) were treated with 3,211 single implants during the inclusion period (31 years). Of these, 573 (615 operations, 754 implants) were followed up for at least 10 years. Overall proportions of patients followed up for 5 years up to 25 years decreased from 68.2% to 37.0% of treated patients. A higher follow-up compliance was observed for patients treated during the earlier period of inclusion. Patient CSR for 15 and 10 years for maxillary implant placement was 95.8% for turned surfaces and 98.5% for moderately rough surfaces, respectively. Corresponding patient CSR for 10 and 25 years for mandibles was 95.1% and 97.2%, respectively. No implant was reported as a failure after 10 years of follow-up. Conclusion: A significant number of patients can be expected to be lost to follow-up during long-term periods in routine practice. Single-implant treatment is an overall predictable treatment procedure over the long term, with a lower failure rate for implants with a moderately rough surface placed in the maxilla. This difference seems to be established already during the early phase of osseointegration.
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| 82. |
- Jemt, Torsten, 1950, et al.
(författare)
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Single implants and buccal bone grafts in the anterior maxilla: measurements of buccal crestal contours in a 6-year prospective clinical study.
- 2005
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Ingår i: Clinical implant dentistry and related research. - 1523-0899. ; 7:3, s. 127-135
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Patients provided with buccal bone grafts seem to lose a substantial part of the graft in the short term. PURPOSE: To measure long-term changes in buccal and proximal tissue volumes after local bone grafting and single implant treatment. MATERIALS AND METHODS: Eight of 10 originally treated male patients were followed up for 6 years after treatment with buccal bone grafts in the central incisor region. After a healing time of 6 months, a two-stage implant surgery procedure was performed followed by single crown placement. Clinical photographs and impressions were taken prior to the surgical interventions and after crown placement and at first and fifth annual checkups. The photographs were analyzed with regard to papilla regeneration by means of a clinical papilla index. The models were used to measure the clinical length of teeth and tooth movements adjacent to the implants. Changes in buccal crest volume during the study period were measured by means of optical scanning of obtained study models. RESULTS: Papillae volume increased significantly (p<.05) during the first year, thereafter showing a slow further increase during the 4 following years. Three of the patients (38%) presented small movements of their adjacent central incisor in a vertical or palatal direction of less than 1 mm during the follow-up period. All patients showed resorption during the first year after grafting (p<.01), in which three patients (38%) had lost basically all of increased volume at second surgery. After abutment or crown placement, all patients showed an increased volume (p<.01), followed by an average reduction during the first year, reaching a significant level in the apical part of the crest (p<.05). Thereafter, a relatively stable average situation was observed during the following 4 years, with individual variations, however. CONCLUSION: Local bone grafting seems to create sufficient bone volume for implant placement after 6 months, but individual variations in resorption pattern make the grafting procedure unpredictable for long-term prognosis. Instead, the abutment and the crown seem to play a more important role for building up and maintaining the buccal contour in the coronal part of the crest long term.
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| 83. |
- Jemt, Torsten, 1950
(författare)
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Single implants in the anterior maxilla after 15 years of follow-up: comparison with central implants in the edentulous maxilla
- 2008
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Ingår i: International Journal of Prosthodontics. - 0893-2174. ; 21:5, s. 400-8
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To present long-term clinical and radiographic data on single-implant treatment in the anterior maxilla and to compare these results with comparable data of central implants supporting fixed prostheses in the edentulous maxilla. MATERIALS AND METHODS: A total of 38 patients consecutively restored with 47 single-implant crowns in the anterior maxilla were included in the single-implant (study) group. The implants in the edentulous group (control) were included by randomly selecting one of the central implants (closest to midline) from 76 consecutively treated edentulous patients. Mean age was 25.4 years (SD: 10.0) and 60.1 years (SD: 11.6) at inclusion (P < .001) for the study and control groups, respectively. Clinical and radiographic data were retrospectively retrieved from files holding up to 15 years of function in both groups. RESULTS: No implants in the study group were lost (cumulative success rate: 100%), while 3 implants in the control group were lost (cumulative success rate: 95.4%). Ten single crowns were replaced (15-year cumulative survival rate: 77.0%), and the study group showed more mucosal problems and fistulas compared to the implants in the control group (P < .05). Loose screws were a common problem in the single-implant group during the first 5 years of function, but bone loss did not differ significantly between patients with stable and loose screws/fistulas (P > .05) or between study and control implants after 15 years (P > .05). CONCLUSIONS: There is an obvious difference between the survival of the implants (100%) and original implant crowns (77%) in the study group. The present early single-implant restorations showed significantly more mechanical/fistula problems compared to central implants in the edentulous maxilla (P < .05), but bone response was similar for both groups during 15 years of follow-up. Bone loss was not affected by the level of the implant head in relation to the cementoenamel junction of adjacent teeth, nor was it affected by mechanical or mucosal problems or persistent fistulas of the single implants during the entire follow-up period.
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| 84. |
- Jemt, Torsten, 1950, et al.
(författare)
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Tooth movements adjacent to single-implant restorations after more than 15 years of follow-up.
- 2007
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Ingår i: The International journal of prosthodontics. - 0893-2174. ; 20:6, s. 626-32
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To analyze the prevalence and magnitude of tooth movements adjacent to single-implant crowns in a long-term study, and to discuss these changes in relation to changes in cephalometric measurements of a reference group after 10 years. MATERIALS AND METHODS: Twenty-five of an original group of 39 patients, consecutively restored with single-implant crowns in the anterior maxilla, were included. The mean age was 25.4 years (SD: 10.0) at inclusion. Clinical photographs were taken at implant crown placement and at the final examination an average of 15.9 years (SD: 0.74) later. The reference group comprised 134 dental students with a mean age of 22.9 years (SD: 1.20) at inclusion. Cephalograms and study casts were made at inclusion and after 10 years. Study casts were also made after 20 years (n = 61). Tooth movements were assessed adjacent to the implant crowns according to a clinical index. For the reference group, cephalometric measurements were performed for anterior and posterior face height and gonion and nasion-sella line/mandibular line (NSL/ML) angles. Vertical overbite measurements were collected from the study casts. RESULTS: Altogether, 28 implant crowns were included in the test group. Male patients presented a clinically stable situation without any signs of vertical tooth movement adjacent to the single-implant restorations in 11 of 20 implant sites, compared to none in female patients (P < .05). With regard to horizontal tooth movements, 55% of the sites showed palatal tooth movements, which were relatively more common in females. Both males and females presented a significant average increase of anterior and posterior face height (P < .05), but only females presented a significant increase of the NSL/ML angle. Average vertical overbite was basically stable for 20 years, but individual variations were obvious. CONCLUSIONS: A possible relationship between significantly higher incidence of tooth movements adjacent to implants in females in the study group and significantly greater increase of anterior face height and posterior rotation of the mandible in the female reference group was observed.
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| 85. |
- Jemt, Torsten, 1950
(författare)
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Where are we coming from?
- 2018
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Ingår i: International Journal of Prosthodontics. - 0893-2174. ; 31, s. S31-S34
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Tidskriftsartikel (refereegranskat)
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| 86. |
- Jensen, Ole T., et al.
(författare)
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Foreign Body Osseointegration
- 2023
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Ingår i: The International journal of oral & maxillofacial implants. - 1942-4434. ; 38, s. 838-840
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Tidskriftsartikel (refereegranskat)
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| 87. |
- Karlsson, Stig, 1944, et al.
(författare)
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Adaptive changes of masticatory movement characteristics after rehabilitation with osseointegrated fixed prostheses in the edentulous jaw: a 10-year follow-up study.
- 1991
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Ingår i: The International journal of oral & maxillofacial implants. - 0882-2786. ; 6:3, s. 259-63
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to assess possible adaptive changes in the masticatory rhythmical pattern after insertion of an osseointegrated fixed denture. Registrations of masticatory cycle duration, mandibular velocity, and displacement were performed before and 2 months and 10 years after rehabilitation. No major changes except for a decreased occlusal level phase had occurred regarding cycle duration over the years. However, a significantly higher mandibular velocity and greater displacement were recorded 2 months after rehabilitation. This trend was further established in the long term. Temporal timing of rhythmical chewing seems to be relatively consistent, suggesting that the central pattern generator driving output over time is constant.
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| 88. |
- Kowar, J., et al.
(författare)
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Causes of Death in Implant Patients Treated in the Edentulous Jaw: A Comparison between 2098 Deceased Patients and the Swedish National Cause of Death Register
- 2019
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Ingår i: International Journal of Dentistry. - : Hindawi Limited. - 1687-8728 .- 1687-8736.
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Tidskriftsartikel (refereegranskat)abstract
- Background. Previous research has reported an association between tooth loss and patient mortality, while the cause of death has not been elucidated. Objective. The purpose was to describe and compare the cause of death in implant patients treated consecutively in the edentulous arch with a reference population. Methods. Altogether, 3902 patients were included between 1986 and 2014. Data on the causes of death for deceased patients were compared to the Swedish National Cause of Death Register for a comparable time period. Standardised mortality ratios (SMRs) were calculated based on gender and age and tested for statistical significance. Results. Most deceased patients (2,098) died from diseases in the circulatory system (CVD; 42%) and from cancers (26%). SMR indicated a generally increased mortality (total group) compared to the reference population during inclusion (P < 0.05; 1986-2014). Patients treated early (1986-1996) showed a lower SMR compared to patients treated later (P < 0.05; 1997-2014) especially related to CVDs. Younger patients (<60 years at surgery) showed an increased mortality due to CVDs when treated late (1997-2014; SMR = 5.4, P < 0.05). Elderly patients (>79 years at surgery) showed a significantly lower mortality in almost all observed causes of death (1986-2014; P < 0.05) with also a significantly lower mortality due to CVDs during the early period (1986-1996; SMR = 0.3, P < 0.05). Conclusion. An overall increased mortality was observed for the edentulous implant patient compared to the reference population. Elderly patients (>79 years) showed significantly lower mortality for all causes of death independent of the time period of implant surgery. Younger patients (<60 years) present an increased risk for early mortality related to CV D. SMR for all causes of death increased for patients treated late (1997-2014) as compared to patients treated early (1986-1996).
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| 89. |
- Kowar, Jan, 1972, et al.
(författare)
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Fixed Implant-Supported Prostheses in Elderly Patients: A 5-Year Retrospective Comparison between Partially and Completely Edentulous Patients Aged 80 Years or Older at Implant Surgery.
- 2013
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Ingår i: Clinical implant dentistry and related research. - : Wiley. - 1708-8208 .- 1523-0899. ; 15:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Knowledge on implant treatment in the partially edentulous patient is low for elderly patients aged 80 years or older at inclusion. Purpose: The objective of this study was to report and compare the clinical and radiological performance of implant treatment in edentulous and partially edentulous elderly patients during 5 years in function. Material and Methods: Altogether, 192 edentulous (control) and 72 partially edentulous (study) patients, consecutively treated and provided with 1,091 and 265 Brånemark implants, respectively, were included during a period between January 1986 and December 2003, and followed-up for 5 years. Clinical information was retrospectively retrieved from patient files and intraoral radiographs were analyzed for examinations at prosthesis placement and after 1 and 5 years in function. Results: Altogether, 92 (48%) control and 24 (33%) study patients were lost to follow-up during the 5-year period. In total, 13 (4.9%) and 26 (2.4%) implants were in the study and control groups, respectively, were lost during follow-up, resulting in a comparable 5-year implant cumulative survival rate ranging from 93.9% to 99.3% for upper and lower jaws for study and control groups, respectively. Comparable mean marginal bone loss during 5 years, ranging from 0.4 mm to 0.6 mm, was also observed in the groups. The most common complications for patients in both study and control group were soft tissue inflammation (mucositis). Patients included in the first years of the inclusion (1986-1991) period showed comparable results as patient included at the last part of the inclusion period (1998-2003). Conclusions: Implant treatment in the partially edentulous elderly patients showed comparable clinical and radiographic results as elderly patients treated in the edentulous jaw.
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| 90. |
- Kowar, J., et al.
(författare)
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Mortality in Edentulous Patients: A Registry-Based Cohort Study in Sweden Comparing 8463 Patients Treated with Removable Dentures or Implant-Supported Dental Prostheses
- 2021
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Ingår i: International Journal of Dentistry. - : Hindawi Limited. - 1687-8728 .- 1687-8736. ; 2021
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Tidskriftsartikel (refereegranskat)abstract
- Objectives. The purpose of this study was to investigate if edentulism is associated with all-cause mortality. The aims were to analyze the association between age, socioeconomic factors, and mortality in edentulous patients treated with either removable dentures or implant-supported prostheses. Methods. All patients who became edentulous according to the Swedish Social Insurance Agency (SSIA) between 2009 and 2013 (N = 8463) were analyzed regarding prosthetic treatment, age, gender, and socioeconomic status. The patients were divided into two groups, depending on whether they were treated with dental implants (implant group; IG) or with conventional removable dentures (denture group; DG). Data on mortality for all included individuals were obtained from the Swedish National Cause of Death Register and compared to a reference population. Cumulative survival rates were calculated, and a multivariable regression analysis for the included variables was performed. Results. Between 2009 and 2018, 2192 of the patients (25.9%) were treated with implant-supported dental prostheses (IG) and 6271 patients (74.1%) were treated with removable dentures without support of dental implants (DG). Altogether 2526 patients (30%) died until December 31, 2019, and the overall mortality was significantly higher for the DG compared to the IG during follow-up (p<0.001). Younger edentulous patients (<= 59 years) presented a higher mortality than the reference population, while implant patients over 79 years of age demonstrated a lower mortality. The final results from the multivariable logistic analysis showed that lower equalized disposable income (EDI) and the choice of conventional removable dentures are the most important factors for increased patient mortality (p<0.001). Conclusions. Edentulous patients have an overall higher mortality compared to a reference population. Low socioeconomic status increases all-cause mortality. Individuals treated with dental implants show statistically significant lower 10-year mortality compared to patients treated with conventional removable dentures, regardless of socioeconomic status.
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