title: A prospective randomized study comparing two techniques of bone augmentation: onlay graft alone or associated with a membrane.
abstract: Two techniques of ridge augmentation using onlay bone graft alone or associated with a non-resorbable membrane have been previously described. This prospective, randomized study compared these two techniques at 6 months, in terms of bone gain, resorption and quality obtained at edentulous sites. Osseous measurements were taken using stents, callipers and CT-scans. Membrane exposure occurred at one site, 4 weeks after placement. Endosseous implants were successfully placed at all grafted sites. The mean graft thickness for all subjects was 4.7 mm (range: 2.3-6.2 mm). Overall mean resorption was 1.5 mm (range: 0-4.6 mm) whereas overall mean width gain was 3.2 mm (range: 0.8-6.2 mm). Six months following surgery, the membrane group experienced significantly less bone resorption than the graft alone group (P<0.01). Width augmentation did not differ significantly between the two groups. In conclusion, combining a membrane with an onlay graft demonstrates less bone resorption with a minimal risk of complications. Longer follow-up is needed to confirm the benefits of using a non-resorbable membrane.
authors.affiliation: Department of Oral Surgery and Oral Implantology, School of Dentistry, University Paris 7, Denis Diderot, Paris, France. hantoun@noos.fr
authors.forename: H
authors.initials: H
authors.lastname: Antoun
authors.forename: J M
authors.initials: JM
authors.lastname: Sitbon
authors.forename: H
authors.initials: H
authors.lastname: Martinez
authors.forename: P
authors.initials: P
authors.lastname: Missika
mesh_terms: D000293:Adolescent; D000328:Adult; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D016025:Bone Transplantation; D003758:Dental Implantation, Endosseous; D005260:Female; D006801:Humans; D008297:Male; D008567:Membranes, Artificial; D008875:Middle Aged; D011138:Polytetrafluoroethylene; D011446:Prospective Studies; D018709:Statistics, Nonparametric; D016896:Treatment Outcome
chemical_list: D008567:Membranes, Artificial; D011138:Polytetrafluoroethylene