title: The Effect of early physiotherapy on the recovery of mandibular function after orthognathic surgery for Class III correction: part I--jaw-motion analysis.
abstract: The aim of this prospective study was to compare the mandibular range of motion in Class III patients with and without early physiotherapy after orthognathic surgery (OGS). This study consisted of 63 Class III patients who underwent 2-jaw OGS. The experimental group comprised 31 patients who received early systematic physical rehabilitation. The control group consisted of 32 patients who did not have physical rehabilitation. Twelve variables of 3-dimensional (3D) jaw-motion analysis (JMA) were recorded before surgery (T1) and 6 weeks (T2) and 6 months (T3) after surgery. A 2-sample t test was conducted to compare the JMA results between the two groups at different time points. At T2, the JMA data were measured to be 77.5%-145.7% of presurgical values in the experimental group, and 60.3%-90.6% in the control group. At T3, the measurements were 112.2%-179.2% of presurgical values in the experimental group, and 77.6%-157.2% in the control group. The patients in the experimental group exhibited more favorable recovery than did those in the control group, from T1 to T2 and T1 to T3. However, after termination of physiotherapy, no significant difference in the extent of recovery was observed between groups up to 6 months after OGS.
authors.affiliation: Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan; Department of Dentistry, Taoyuan Armed Forces General Hospital, Taiwan.
authors.forename: Terry Te-Yi
authors.initials: TT
authors.lastname: Teng
authors.affiliation: Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan; Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Taipei, Taiwan; Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan. Electronic address: ellenko.wc@msa.hinet.net.
authors.forename: Ellen Wen-Ching
authors.initials: EW
authors.lastname: Ko
authors.affiliation: Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan; Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Taipei, Taiwan; Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan.
authors.forename: Chiung Shing
authors.initials: CS
authors.lastname: Huang
authors.affiliation: Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan; Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan.
authors.forename: Yu-Ray
authors.initials: YR
authors.lastname: Chen
mesh_terms: D000328:Adult; D002508:Cephalometry / Q000379:methods; D015331:Cohort Studies; D004032:Diet; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008334:Mandible / Q000503:physiopathology* / Q000601:surgery; D008335:Mandibular Condyle / Q000503:physiopathology; D008437:Maxilla / Q000601:surgery; D009068:Movement; D009971:Orthodontics, Corrective / Q000379:methods; D056948:Orthognathic Surgical Procedures / Q000379:methods*; D019340:Osteotomy, Le Fort / Q000379:methods; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods; D026741:Physical Therapy Modalities; D011446:Prospective Studies; D016059:Range of Motion, Articular / Q000502:physiology; D020127:Recovery of Function / Q000502:physiology*; D055815:Young Adult
keywords: 3D jaw-motion analysis (JMA); Mandibular range of motion; Orthognathic surgery; Physiotherapy; Skeletal Class III malocclusion