A multicentered clinical study on posterior resin-bonded bridges: the 'Manchester trial'.
This study was designed to investigate and identify factors relevant to the success and failure of posterior resin-bonded bridges (PRBBs) related to the patient, technique, operator and bridge design. It was a long-term controlled clinical trial and formed part of a multicentered study on PRBBs. Data are presented 2.5 years from the start of the study. Following a strict protocol for case selection, 54 posterior, resin-bonded, fixed-fixed, three unit bridges were placed in 45 patients. Twenty-four patients with 27 PRBBs attended for 2.5-year recall. Treatment variables were limited to one of two operators and either a conventional tooth preparation or a more extensive modified preparation was performed. The allocation of treatment modalities was performed using a computer program to balance patient variables such as age, gender, location of bridge, restoration of abutment teeth. All bridges were produced in one laboratory, treated to produce a silicate-coating bond and placed using Microfill Pontic C (Kulzer, Wehrheim, Germany). Data relating to the patients, the open spaces, bridge preparation, bridge placement and subsequent annual evaluation were recorded. The survival of PRBBs in the maxilla was 77% and in the mandible 47%.
Department of Restorative Dentistry, University Dental Hospital of Manchester, UK.
M
M
Kellett
C W
CW
Verzijden
G A
GA
Smith
N H
NH
Creugers
D000293:Adolescent; D000328:Adult; D000368:Aged; D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D000044:Dental Abutments; D001840:Dental Bonding; D003779:Denture Design; D016379:Denture, Partial, Fixed, Resin-Bonded; D004739:England; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar; D011475:Prosthesis Failure; D013499:Surface Properties; D013997:Time Factors
D017438:Bisphenol A-Glycidyl Methacrylate