title: The effects of resorbable membrane on human maxillary sinus graft: a pilot study.
abstract: OBJECTIVE
  To investigate the effects of resorbable membrane on new bone formation in human maxillary sinus graft using anorganic bovine bone material histomorphometrically in a split-mouth study design.
  
  
  METHODS
  This prospective pilot study included six patients who required bilateral sinus augmentations prior to implant treatment. Each patient was grafted with anorganic bovine bone (Bio-Oss). The experimental side was covered with resorbable membrane (Bio-Gide) over the grafted sinus, and the control side was left uncovered. After 8 months of healing (range, 7 to 9 months), implants were placed. Biopsy samples were obtained from each side through the previously grafted sinus window and evaluated. Statistical analysis was performed using the Mann-Whitney U test at a significance level of alpha = .05.
  
  
  RESULTS
  The control side appeared to have a significantly greater amount of soft tissue than the experimental side (P = .026), whereas no significant differences in the amount of new bone were observed (P = .937).
  
  
  CONCLUSIONS
  Resorbable membranes significantly reduced the amount of soft tissue formed in the sinus grafted with anorganic bovine bone material but had no effect on new bone formation.
authors.affiliation: Busan National University, School of Dentistry, Busan, Korea. implantdoctor@yahoo.co.kr
authors.forename: Kyung-Soo
authors.initials: KS
authors.lastname: Choi
authors.forename: Joseph Y K
authors.initials: JY
authors.lastname: Kan
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Boyne
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Goodacre
authors.forename: Jaime L
authors.initials: JL
authors.lastname: Lozada
authors.forename: Kitichai
authors.initials: K
authors.lastname: Rungcharassaeng