title: Matthews device arthroplasty presents superior long-term mouth opening than interpositional arthroplasty in the management of temporomandibular joint ankylosis.
abstract: BACKGROUND
  The aim of this study is to describe the surgical outcomes of a single-institution experience in the surgical management of temporomandibular joint ankylosis, comparing interpositional arthroplasty with autogenous tissue and Matthews device arthroplasty.
  
  
  METHODS
  A retrospective analysis of temporomandibular joint ankylosis patients (n = 15), who underwent interpositional arthroplasty or Matthews device arthroplasty, was conducted. The surgical outcomes (preoperative, recent [4-6 weeks], intermediate [1 year], and late [3 years] postoperative maximal incisal opening, hospital stay, and complication, relapse, and reoperation rates) were compared.
  
  
  RESULTS
  Significant (all p < 0.05) differences were recorded in temporomandibular joint ankylosis patients treated with interpositional arthroplasty with autogenous tissue (53.3%) versus Matthews device arthroplasty (46.7%) according to intermediate (25 ± 7 vs. 34 ± 5 mm) and late (19 ± 8 vs. 33 ± 5 mm) postoperative maximal incisal opening, intermediate (31% vs. 7%) and late (47% vs. 12%) postoperative relapse, and reoperation rate (38% vs. 0%). There was similarity (all p > 0.05) in preoperative (4.8 ± 2.9 vs. 4.9 ± 2.9 mm) and recent (35 ± 4 vs. 37 ± 4 mm) postoperative maximal incisal opening, hospital stay (3.5 ± 0.8 vs. 3.6 ± 0.8 days), and surgery-related complications (13% vs. 14%).
  
  
  CONCLUSIONS
  Both surgical procedures evaluated were successful in initial management of temporomandibular joint ankylosis, but the Matthews device arthroplasty avoided postoperative relapse.
authors.affiliation: Institute of Plastic and Craniofacial Surgery, SOBRAPAR Hospital, Campinas, Sao Paulo, Brazil.
authors.forename: Rafael
authors.initials: R
authors.lastname: Denadai
authors.affiliation: Institute of Plastic and Craniofacial Surgery, SOBRAPAR Hospital, Campinas, Sao Paulo, Brazil.
authors.forename: Cassio Eduardo
authors.initials: CE
authors.lastname: Raposo-Amaral
authors.affiliation: Institute of Plastic and Craniofacial Surgery, SOBRAPAR Hospital, Campinas, Sao Paulo, Brazil.
authors.forename: Celso Luiz
authors.initials: CL
authors.lastname: Buzzo
authors.affiliation: Institute of Plastic and Craniofacial Surgery, SOBRAPAR Hospital, Campinas, Sao Paulo, Brazil. Electronic address: cesaraugustoraposo@hotmail.com.
authors.forename: Cesar Augusto
authors.initials: CA
authors.lastname: Raposo-Amaral
mesh_terms: D000293:Adolescent; D000328:Adult; D000844:Ankylosis / Q000601:surgery*; D001178:Arthroplasty / Q000295:instrumentation / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D013705:Temporomandibular Joint Disorders / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult
keywords: Surgical outcomes; Surgical treatment; TMJ ankylosis; Temporomandibular joint bony ankylosis