Repair of the perforated sinus membrane with a resorbable collagen membrane: a human study.

Abstract

PURPOSE The purpose of this study was to evaluate the results of the repair of perforated sinus membranes with resorbable collagen membrane. MATERIALS AND METHODS A split-mouth design was followed. Twelve subjects requiring bilateral sinus grafting were included in the study; one site had been accidentally perforated during sinus augmentation and the other site had not been perforated. The perforated sites were repaired with a resorbable collagen membrane. Dental implants were placed during a second surgery, and biopsy samples were harvested from both sinuses during implant placement. New bone formation was measured for all sites. Implant survival was recorded at second-stage surgery. Panoramic radiographs were taken before and after sinus grafting and after implant placement. RESULTS Nonperforated sites demonstrated significantly more bone formation (33.58% +/- 7.45%) than perforated sites (14.17% +/- 7.06%) (P