Variables for Long-term Success in Implant Dentistry

University of Bern

Status

Completed

Conditions

Dental Implant Failure

Treatments

Other: Oral rehabilitation with dental implants

Study type

Observational

Funder types

Other

Identifiers

NCT06599320

2023-02279

ITI n 1574_2021 (Other Grant/Funding Number)

Details and patient eligibility

About

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

Full description

Specific aims

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) (Straumann® 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).

Enrollment

160 patients

Sex

All

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

All patients rehabilitated with oral dental implants supporting fixed partial dental prostheses and followed up for at least 20-years.

Exclusion criteria

None