Ten-year results of a prospective study using porous-surfaced dental implants and a mandibular overdenture.
BACKGROUND
Numerous investigators have used osseointegrated dental implants as retention for mandibular overdentures, but few have reported 10-year outcomes or incorporated carefully standardized radiographs to document crestal bone loss.


OBJECTIVE
The purpose of this study was to use a prospective clinical trial design to assess the performance of short sintered porous-surfaced dental implants with a mandibular complete overdenture when all patients in the trial had undergone 10 years of continuous function.


METHODS
Fifty-two fully edentulous patients, most with advanced alveolar ridge resorption, each received three free-standing Endopore implants (7-10 mm in length, mean length, 8.7 mm; Innova Corporation, Toronto, ON, Canada) in the mandibular symphysis region. After 10 weeks of submerged healing, these implants were used to support an overdenture. Carefully standardized radiographs, using a customized stainless steel filmholder attached to each implant and the x-ray tube, were collected at baseline, 3 months, 6 months, yearly to 5 years, and then again at 7and 10 years.


RESULTS
Life table analysis revealed a 10-year implant survival of 92.7% and a mean annual bone loss after year 1 of 0.03 mm.


CONCLUSIONS
Short free-standing dental implants with a sintered porous surface used for implant fixation are a predictable and effective means of retaining a mandibular overdenture in patients with advanced mandibular ridge resorption.
Deporter
Douglas
D
Faculty of Dentistry, University of Toronto, ON, Canada. Douglas.deporter@utoronto.ca
Watson
Philip
P
Pharoah
Michael
M
Todescan
Reynaldo
R
Tomlinson
George
G
D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology; D003758:Dental Implantation, Endosseous; D015921:Dental Implants / Q000009:adverse effects; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003828:Denture, Overlay; D005500:Follow-Up Studies; D006801:Humans; D015993:Life Tables; D008334:Mandible; D008875:Middle Aged; D009066:Mouth, Edentulous / Q000534:rehabilitation*; D016062:Porosity; D011446:Prospective Studies; D011859:Radiography; D013499:Surface Properties
D015921:Dental Implants