title: Efficiency of two protocols for maxillary molar intrusion with mini-implants.
abstract: OBJECTIVE
  The aim of this study was to compare the efficiency of two protocols for maxillary molar intrusion with two or three mini-implants.
  
  
  METHODS
  Twenty five maxillary first molars extruded for loss of their antagonists in adult subjects were selected. The sample was divided into two groups, according to the intrusion protocol with two or three mini-implants. Group 1 consisted of 15 molars that were intruded by two mini-implants. Group 2 consisted of 10 molars intruded by three mini-implants. Changes with treatment were analyzed in lateral cephalograms at the beginning and at the end of intrusion of maxillary molars.
  
  
  RESULTS
  Results showed that there was no difference in efficiency for the two intrusion protocols. It was concluded that extruded maxillary molars can be intruded with two or three mini-implants with similar efficiency.
authors.affiliation: Department of Orthodontics, Universidade Cidade de São Paulo, São Paulo, São Paulo, Brazil.
authors.forename: Juliana Volpato Curi
authors.initials: JV
authors.lastname: Paccini
authors.affiliation: Department of Orthodontics, Universidade Cidade de São Paulo, São Paulo, São Paulo, Brazil.
authors.forename: Flávio Augusto
authors.initials: FA
authors.lastname: Cotrim-Ferreira
authors.affiliation: Department of Orthodontics, Universidade Cidade de São Paulo, São Paulo, São Paulo, Brazil.
authors.forename: Flávio Vellini
authors.initials: FV
authors.lastname: Ferreira
authors.affiliation: Department of Orthodontics, Faculdade Ingá, Maringá, Paraná, Brazil.
authors.forename: Karina Maria Salvatore de
authors.initials: KM
authors.lastname: Freitas
authors.affiliation: Department of Orthodontics, Faculdade Ingá, Maringá, Paraná, Brazil.
authors.forename: Rodrigo Hermont
authors.initials: RH
authors.lastname: Cançado
authors.affiliation: Department of Orthodontics, Faculdade Ingá, Maringá, Paraná, Brazil.
authors.forename: Fabrício Pinelli
authors.initials: FP
authors.lastname: Valarelli
mesh_terms: D000328:Adult; D002508:Cephalometry; D015921:Dental Implants; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008437:Maxilla; D052280:Orthodontic Anchorage Procedures; D012189:Retrospective Studies; D014087:Tooth Movement Techniques / Q000295:instrumentation*
chemical_list: D015921:Dental Implants