title: A pilot clinical study of Class III surgical patients facilitated by improved accelerated osteogenic orthodontic treatments.
abstract: OBJECTIVE
  To evaluate if the improved accelerated osteogenic orthodontics (IAOO) procedure could speed Class III surgical patients' preoperative orthodontic treatment duration and, if yes, to what extent. This study was also designed to determine whether or not an IAOO procedure affects the tooth-moving pattern during extraction space closure.
  
  
  METHODS
  The samples in this study consisted of 24 Class III surgical patients. Twelve skeletal Class III surgery patients served as an experimental group (group 1) and the others as a control group (group 2). Before treatment, the maxillary first premolars were removed. For group 1, after the maxillary dental arch was aligned and leveled (T2), IAOO procedures were performed in the maxillary alveolar bone. Except for this IAOO procedure in group 1, all 24 patients experienced similar combined orthodontic and orthognathic treatment. Study casts of the maxillary dentitions were made before orthodontic treatment (T1) and after extraction space closure (T3). All of the casts were laser scanned, and the amount of movement of the maxillary central incisor, canine, and first molar, as well as arch widths, were digitally measured and analyzed by using the three-dimensional model superimposition method.
  
  
  RESULTS
  The time durations T3-T2 were significantly reduced in group 1 by 8.65 ± 2.67 months and for T3-T1 were reduced by 6.39 ± 2.00 months (P < .001). Meanwhile, the tooth movement rates were all higher in group 1 (P < .05). There were no significant differences in the amount of teeth movement in the sagittal, vertical, and transverse dimensions between the two groups (P > .05).
  
  
  CONCLUSIONS
  The IAOO can reduce the surgical orthodontic treatment time for the skeletal Class III surgical patient by more than half a year on average. The IAOO procedures do not save anchorage.
authors.affiliation: a  Resident Doctor, First Clinical Division, Peking University School and Hospital of Stomatology, Beijing, China.
authors.forename: JiaQi
authors.initials: J
authors.lastname: Wu
authors.affiliation: b  Associate Professor, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
authors.forename: Jiu-Hui
authors.initials: JH
authors.lastname: Jiang
authors.affiliation: c  Professor, Department of Periodontics, Peking University School and Hospital of Stomatology, Beijing, China.
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.affiliation: d  Associate Professor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Liang
authors.affiliation: e  Postgraduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
authors.forename: YunYang
authors.initials: Y
authors.lastname: Bai
authors.affiliation: f  Postgraduate student, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zou
mesh_terms: D000293:Adolescent; D000328:Adult; D000539:Alveolar Process / Q000601:surgery; D001641:Bicuspid / Q000601:surgery; D016022:Case-Control Studies; D002508:Cephalometry / Q000379:methods; D000071538:Cortical Bone / Q000601:surgery; D003481:Cuspid / Q000473:pathology; D003724:Dental Arch / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D007180:Incisor / Q000473:pathology; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery / Q000628:therapy*; D008437:Maxilla / Q000601:surgery; D008963:Molar / Q000473:pathology; D019516:Orthodontic Space Closure / Q000379:methods; D010012:Osteogenesis / Q000502:physiology; D059745:Piezosurgery / Q000379:methods; D010865:Pilot Projects; D011300:Preoperative Care; D013997:Time Factors; D014081:Tooth Extraction / Q000379:methods; D014087:Tooth Movement Techniques / Q000379:methods*; D014584:User-Computer Interface; D055815:Young Adult
keywords: Class III surgical patients; Corticotomy; Improved accelerated osteogenic orthodontics; Preoperative orthodontic treatment duration; Three-dimensional measurement; Tooth movement pattern