Study Results
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Basic Information
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COMPLETED
160 participants
OBSERVATIONAL
2024-09-09
2025-12-31
Brief Summary
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* to assess the clinical parameters at SLA implants after 25 years in function
* to assess the crestal bone levels at SLA implants after 25 years in function
* to assess and compare the microbiological conditions at SLA implants and their adjacent teeth after 25 years of function
* to assess the periodontal conditions in patients having received SLA implants 25 years ago
* to establish a baseline data set for future prospective studies on patients having received SLA implants 25 years ago
* to assess the incidence rates of biological, technical, traumatic failures / complications with SLA implants
* to assess the incidence rates of technical failures / complications with prosthetic components on SLA implants
* to assess the incidence rates of biological, technical, mechanical, esthetic failures / complications with prosthetic reconstructions on SLA implants
* to find potential risk factors for biological failures / complications with SLA implants; i.e. patients having lost their teeth due to different reasons (e.g. partial anodontia, caries, periodontitis, endodontic failure, trauma, vertical root fracture), (ii) to calculate the success rates using different thresholds set as success criteria, (iii) to evaluate the influence of medical conditions and tobacco smoking on the long-term prognosis of titanium oral implants, and (iv) to assess the frequency and quality of maintenance
* to find potential risk factors for mechanical, technical, esthetic failures/complications with reconstructions seated on SLA implants
* to assess the treatment need and utility of implant therapy after 25 years in patients having received SLA implants
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Detailed Description
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The aims of the present retrospective 25-year study of a sample of 459 patients with 753 sandblasted and acid-etched (SLA) titanium oral implants are:
* to assess the clinical parameters at SLA implants after 25 years in function
* to assess the crestal bone levels at SLA implants after 25 years in function
* to assess and compare the microbiological conditions at SLA implants and their adjacent teeth after 25 years of function
* to assess the periodontal conditions in patients having received SLA implants 25 years ago
* to establish a baseline data set for future prospective studies on patients having received SLA implants 25 years ago
* to assess the incidence rates of biological, technical, traumatic failures / complications with SLA implants
* to assess the incidence rates of technical failures / complications with prosthetic components on SLA implants
* to assess the incidence rates of biological, technical, mechanical, esthetic failures / complications with prosthetic reconstructions on SLA implants
* to find potential risk factors for biological failures / complications with SLA implants; i.e. patients having lost their teeth due to different reasons (e.g. partial anodontia, caries, periodontitis, endodontic failure, trauma, vertical root fracture), (ii) to calculate the success rates using different thresholds set as success criteria, (iii) to evaluate the influence of medical conditions and tobacco smoking on the long-term prognosis of titanium oral implants, and (iv) to assess the frequency and quality of maintenance
* to find potential risk factors for mechanical, technical, esthetic failures/complications with reconstructions seated on SLA implants
* to assess the treatment need and utility of implant therapy after 25 years in patients having received SLA implants
Material and methods Out of the pool of patients from the Departments of Oral Surgery and Periodontology and Fixed Prosthodontics at the University of Bern, Switzerland, all patients having received at least one dental implant will be recruited for a comprehensive evaluation 25 years after implant installation and delivery of the reconstruction. The patients had been treated according to a comprehensive treatment strategy prior to the installation of implants and incorporation of reconstructions. All patients were offered maintenance care that was provided either in the School of Dental Medicine, University of Bern, Switzerland, or in the dental practices of the referring dentists at intervals between 3 and 6 months.
All the implants installed were solid screws (SS) with a diameter of 3.3, 4.1 or 4.8 mm, a length between 6-14 mm and a sandblasted and acid-etched surface (SLA) (StraumannĀ® Dental Implant System, Institute Straumann AG, Basel, Switzerland). The implants were placed according to the manufacturer's instructions. The reconstructions were either cemented or screw-retained and consisted of single-unit crowns (SCs) or short-span fixed dental prostheses (FDPs) with or without cantilever extension(s).
Conditions
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Study Design
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COHORT
CROSS_SECTIONAL
Study Groups
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Partial edentulous patients rehabilitated with at least one dental implant
Partial edentulous patients rehabilitated with at least one dental implant in function for at least 20-years
Oral rehabilitation with dental implants
Patients rehabilitated with implant-supported fixed partial dental prostheses
Interventions
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Oral rehabilitation with dental implants
Patients rehabilitated with implant-supported fixed partial dental prostheses
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
ALL
Yes
Sponsors
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University of Bern
OTHER
Responsible Party
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Principal Investigators
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Martin Schimmel
Role: STUDY_CHAIR
University of Bern
Locations
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University of Bern
Bern, , Switzerland
Countries
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References
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Buser D, Janner SF, Wittneben JG, Bragger U, Ramseier CA, Salvi GE. 10-year survival and success rates of 511 titanium implants with a sandblasted and acid-etched surface: a retrospective study in 303 partially edentulous patients. Clin Implant Dent Relat Res. 2012 Dec;14(6):839-51. doi: 10.1111/j.1708-8208.2012.00456.x.
Other Identifiers
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ITI n 1574_2021
Identifier Type: OTHER_GRANT
Identifier Source: secondary_id
2023-02279
Identifier Type: -
Identifier Source: org_study_id
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