Dental Implants Clinical Trial
Official title:
Long-term Examination of Titanium Dental Implants With a TPS Surface: A Prospective 20-year Case Series Study
Since 1986, newly developed titanium implants with a TPS surface have been utilized for the
treatment of partially edentulous patients with implant supported fixed dental prostheses
(FTP). In the beginning, these implant types have been sold by Straumann under the brand
name "Bonefit implants", later "ITI Dental Implant System" From the beginning, the first 75
patients have been documented in a prospective case series study, and clinical and
radiographic results have been reported at 1-year, 3-years, 5-years and 8-years.
The aim of the present study is to examine the long-term outcomes of this original group of
patients with at 20 years of clinical function, and to assess the frequency of biological
and technical complications during this follow-up period.
Background:
The rehabilitation with implant-supported restorations has been a successful treatment
modality in fully and partially edentulous patients since the early 1980s . Today, partially
edentulous individuals have become the main group of patients being considered for implant
therapy, and several reports have been published showing favorable long-term outcomes with
different dental implant systems. In systematic reviews analyzing the long-term performance
of osseointegrated implants, clinical studies with 5-year observation periods are frequently
included. However, studies with a 10-year observation period are sparse. Only three clinical
studies with an observation period of 20-years in edentulous or partially edentulous
patients have been found.
Objective:
The objective is to evaluate dental implants after 20 years of function.
Methods:
Partially edentulous patients provided with implants between 1986 and 1989 at the Department
of Oral Surgery and Stomatology at the University of Bern recruited for a clinical and
radiographic evaluation 20 years after implant installation. A total of 75 patients with 102
implants will be recalled for a clinical and radiographic examination. All implants
installed were hollow screw and hollow cylinder implants (Straumann, Waldenburg,
Switzerland) with a rough TPS surface. They were placed according to the manufacturer's
guidelines. The superstructures consistent in single crowns or fixed partial dentures, which
were incorporated 4-6 months postsurgically. All patients will be evaluated using
information from patient's charts and from the 20-year examination. Apical radiographs will
be taken from the implant and the adjacent tooth. The marginal bone level around the
adjacent tooth will also be calculated using the implant shoulder a reference point.
;
Observational Model: Cohort, Time Perspective: Retrospective
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