title: [Mandibular advancement devices assisted UPPP for treatment of obstructive sleep apnea and hypopnea syndrome].
abstract: OBJECTIVE
  The purpose of this study is to investigate the mechanics of mandibular advancement devices (MAD) assisted uvulopalatopharyngoplasty (UPPP) for treatment of obstructive sleep apnea and hypopnea syndrome (OSAHS).
  
  
  METHODS
  10 patients (8 males, 2 females) were diagnosed as OSAHS by PSG and operated by UPPP. Mandibular advancement devices was used after operation. One month later, all the patients were evaluated by PSG and cephalometric analysis. Paired t test and correlative analysis were carried out using SPSS 10.0 software package.
  
  
  RESULTS
  Cephalometric analysis indicated that MCF, angle C3-Rgn-H, Ant In Mx. Ht were significantly different before and after MAD treatment. AHI was correlative with Ant In Mx. Ht and ratio of tongue area and intermaxillary area(P<0.05).
  
  
  CONCLUSIONS
  MAD in patients undergoing UPPP results in changes of mandibular position, instead of changes of enlargement of velopharynx. Supported by Shanghai Leading Academic Discipline Project (Grant No.Y0203).
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, School of Medicine, Shanghai Jiao Tong University, China. zminnie@yahoo.com
authors.forename: Min
authors.initials: M
authors.lastname: Zhu
authors.forename: Xiao-feng
authors.initials: XF
authors.lastname: Lu
authors.forename: Zhu-mei
authors.initials: ZM
authors.lastname: Xu
authors.forename: You-sheng
authors.initials: YS
authors.lastname: Tang
mesh_terms: D002508:Cephalometry; D002681:China; D006801:Humans; D008334:Mandible; D019186:Mandibular Advancement; D010159:Palate / Q000601:surgery*; D010614:Pharynx / Q000601:surgery*; D020181:Sleep Apnea, Obstructive / Q000601:surgery*; D014609:Uvula / Q000601:surgery*