title: Bone crestal height and bone density after third-molar extraction and grafting: a long-term follow-up study.
abstract: The objective of this study was to evaluate the long-term influence of xenogenic grafts on bone crestal height and radiographic density following extraction of teeth. The right and left third lower molars of 22 patients were surgically extracted, and one randomly chosen socket was filled with a xenogenic graft (Gent-Tech). The contralateral molar was left to heal naturally, serving as a paired control. Digital intraoral radiographies were taken at surgery and 2, 6, and 24 months after, to evaluate bone density (BD) and alveolar bone crest to cementoenamel junction distance. The data obtained were subjected to two-way analysis of variance and Tukey's test (α = 0.05). The significant decrease in cementoenamel junction distance observed for both groups was limited to the first 6 months. BD values increased significantly in the first 6 months, with no alterations observed up to 24 months for both groups. BD was higher for the experimental group at all time points (p < 0.05). Socket grafting with the xenogenic materials tested did not changed bone crestal height and bone radiographic density in the long term.
authors.affiliation: Department of Stomatology and Oral Surgery, School of Dentistry, University of São Paulo, Al. Dr. Otávio Pinheiro Brisolla 9-75, 17012-901 Bauru, São Paulo, Brazil. etiamfob@yahoo.com
authors.forename: Etiene
authors.initials: E
authors.lastname: Andrade Munhoz
authors.forename: Augusto
authors.initials: A
authors.lastname: Bodanezi
authors.forename: Osny
authors.initials: O
authors.lastname: Ferreira Junior
authors.forename: José
authors.initials: J
authors.lastname: Mauro Granjeiro
mesh_terms: D000293:Adolescent; D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D000704:Analysis of Variance; D015519:Bone Density; D018786:Bone Substitutes; D016025:Bone Transplantation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008334:Mandible; D008964:Molar, Third / Q000601:surgery*; D011859:Radiography; D018709:Statistics, Nonparametric; D014081:Tooth Extraction / Q000009:adverse effects*; D020390:Tooth Socket / Q000601:surgery*; D055815:Young Adult
chemical_list: D018786:Bone Substitutes