Implant-supported fixed cantilever prostheses in partially edentulous arches. A seven-year prospective study.
The purpose of the following study was to evaluate the medium- to long-term prognosis of implant-supported cantilever fixed prostheses, and to establish to what degree this is influenced by factors such as length, type of cantilever (mesial or distal), and opposite dentition versus cantilever prostheses. This study was performed on a sample of 38 partially edentulous patients treated between January 1994 and March 2001 with 49 partial cantilever fixed prostheses supported by 100 implants. Marginal bone resorption (MBL) has been studied and used as a reference parameter to define therapeutic success. The MBL measurement was made possible by transposing X-ray images of patients selected on a PC and then using a software program. Statistical analysis was carried out for possible correlation between peri-implant bone resorption and the parameters considered in this study: length and type (mesial or distal) of cantilever and opposite dentition to cantilever prostheses. Seven years after loading cantilever prostheses, the overall cumulative implant survival rate (OCSR) was 97%, and the prostheses success rate is 98%. Mesial cantilever prostheses registered a lower success rate (97.1%) than distal cantilever prostheses (100%). Furthermore, a better prognosis was not observed when the opposite dentition of the prostheses comprised natural teeth, or fixed prostheses on natural teeth, when compared with the cases in which opposite teeth were implant-supported fixed prostheses. The authors concluded that medium-term prognosis of implant-supported cantilever fixed prostheses and traditional implant-supported fixed prostheses was comparable. However, a thorough pre-treatment analysis of risk factors regarding implant-supported prosthesis survival is important.
Romeo
Eugenio
E
Department of Prosthodontics, Dental Clinic, School of Dentistry, University of Milan, Italy. eugenio.romeo@unimi.it
Lops
Diego
D
Margutti
Emilio
E
Ghisolfi
Marco
M
Chiapasco
Matteo
M
Vogel
Giorgio
G
D000328:Adult; D000368:Aged; D001862:Bone Resorption / Q000145:classification / Q000000981:diagnostic imaging; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported / Q000145:classification; D019232:Dental Restoration Failure; D003779:Denture Design; D003830:Denture, Partial, Fixed / Q000145:classification; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007576:Jaw, Edentulous, Partially / Q000000981:diagnostic imaging / Q000534:rehabilitation*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011446:Prospective Studies; D011859:Radiography; D012307:Risk Factors; D016019:Survival Analysis; D014070:Tooth / Q000503:physiopathology; D016896:Treatment Outcome
D015921:Dental Implants