title: [Preliminary evaluation on 3-demension changes of facial soft tissue with structure light scanning technique before and after orthognathic surgery of Class III deformities].
abstract: OBJECTIVE
  To evaluate facial soft tissue 3-deminsion changes of skeletal Class III malocclusion patients after orthognathic surgery using structure light scanning technique.
  
  
  METHODS
  Eight patients [3 males and 5 females, aged (27.08 ± 4.42) years] with Class III dentoskeletal relationship who underwent a bimaxillary orthognathic surgical procedure involving advancement of the maxilla by Le Fort I osteotomy and mandibular setback by bilateral sagittal split ramus osteotomy (BSSO) and genioplasty to correct deformity were included. 3D facial images were obtained by structure light scanner for all the patients 2 weeks preoperatively and 6 months postoperatively. The facial soft tissue changes were evaluated in 3-dimension. The linear distances and angulation changes for facial soft tissue landmarks were analyzed. The soft tissue volumetric changes were assessed too.
  
  
  RESULTS
  There were significant differences in the sagittal and vertical changes of soft tissue landmarks. The greatest amount of soft tissue change was close to lips. There were more volumetric changes in the chin than in the maxilla, and fewer in the forehead.
  
  
  CONCLUSIONS
  After biomaxillary surgery, there were significant facial soft tissue differences mainly in the sagittal and vertical dimension for skeletal Class III patients. The structure light 3D scanning technique can be accurately used to estimate the soft tissue changes in patients who undergo orthognathic surgery.
authors: Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors: Ju-xiang
authors: JX
authors: Peng
authors: Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors: Jiu-hui
authors: JH
authors: Jiang
authors: Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors: Yi-jiao
authors: YJ
authors: Zhao
authors: Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors: Yong
authors: Y
authors: Wang
authors: Department of Orthodontics, Shanxi Provincial People's Hospital, Taiyuan 030012, China.
authors: Ze
authors: Z
authors: Li
authors: Department of Orthodontics, Stomatology Hospital of Shenyang, Shenyang 110002, China.
authors: Ning-ning
authors: NN
authors: Wang
authors: Department of Stomatology, Affiliated Hosipital of Hebei University, Hebei Baoding 071000, China.
authors: Zhi-min
authors: ZM
authors: Feng
mesh_terms: D000328:Adult; D002508:Cephalometry; D002680:Chin; D005145:Face / Q000033:anatomy & histology*; D005147:Facial Bones; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008046:Lip; D008297:Male; D008313:Malocclusion, Angle Class III; D008334:Mandible; D008437:Maxilla; D057909:Orthognathic Surgery; D056948:Orthognathic Surgical Procedures; D059229:Osteotomy, Sagittal Split Ramus; D014716:Vertical Dimension; D055815:Young Adult