title: Orthodontic extrusion with or without circumferential supracrestal fiberotomy and root planing.
abstract: The aim of this randomized clinical trial was to carry out a biometric comparison between the orthodontic extrusion (OE, group B) technique and OE combined with fiberotomy and root planing (OEFRP, group A). Twenty single-root teeth were extruded and assigned to two different groups. In both groups, fixed orthodontic appliances were activated weekly during the course of 3 weeks. After activation, the extruded teeth were maintained in retention for a period of 8 weeks. In group A, along with weekly activation, fiberotomy and root planing were carried out on the top of the alveolar bone crest. Statistical analysis revealed that the amount of dental structure exposed was greater in group A, where the gingival margin and bone tissue remained stable (P < .05). Group B presented coronal migration of the gingival tissue and bone tissue of 2 mm and 1.5 mm, respectively.
authors.affiliation: Division of Periodontics, Department of Stomatology, School of Dentistry, University of São Paulo, Brazil. volpcarv@terra.com.br
authors.forename: Cássio Volponi
authors.initials: CV
authors.lastname: Carvalho
authors.forename: Flávio Paim Falcão
authors.initials: FP
authors.lastname: Bauer
authors.forename: Giuseppe Alexandre
authors.initials: GA
authors.lastname: Romito
authors.forename: Cláudio Mendes
authors.initials: CM
authors.lastname: Pannuti
authors.forename: Giorgio
authors.initials: G
authors.lastname: De Micheli
mesh_terms: D000328:Adult; D000539:Alveolar Process / Q000473:pathology; D001699:Biometry; D016556:Crown Lengthening / Q000379:methods*; D005260:Female; D005881:Gingiva / Q000473:pathology; D005890:Gingivectomy; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D050793:Orthodontic Extrusion / Q000295:instrumentation / Q000379:methods*; D018704:Orthodontic Retainers; D009969:Orthodontic Wires; D016745:Root Planing; D013314:Stress, Mechanical