title: Timing of orthognathic surgery on the changes of oral health-related quality of life in Chinese orthognathic surgery patients.
abstract: BACKGROUND
  Although the association between orthognathic surgery and oral health-related quality of life (OHRQoL) has been explored, few studies have been carried out to describe the influence of surgery type on perceived OHRQoL. The aim of this study was to evaluate the difference of OHRQoL between a surgery-first approach and an orthodontics-first approach, using the 14-item Oral Health Impact Profile questionnaire (Chinese version).
  
  
  METHODS
  Fifty adult Chinese orthodontic patients who received either surgery-first or orthodontics-first treatment completed 5 distinct sections of the questionnaire. Chi-square tests were used to compare categorical variables. All analyses were carried out with Stata software (version 11.2; StataCorp, College Station, Tex).
  
  
  RESULTS
  The quality of life significantly improved after treatment in both groups. However, overall scores were highest before treatment in the surgery-first group but increased significantly from before treatment to 6 months after surgery and then significantly decreased after surgery in the orthodontics-first group. There were relatively lower scores in the surgery-first group than in the orthodontics-first group before surgery, at 12 months after beginning orthodontics, and at the end of treatment, although these differences did not reach significant levels.
  
  
  CONCLUSIONS
  Both treatment methods can obtain the same results. The timing of the orthognathic approach did not affect the final OHRQoL in Chinese orthognathic surgery patients.
authors.affiliation: Department of Orthodontics, Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Orthodontics, Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China.
authors.forename: Weiting
authors.initials: W
authors.lastname: Chen
authors.affiliation: Department of Orthodontics, Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China.
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Ni
authors.affiliation: Department of Orthodontics, Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China.
authors.forename: MinLing
authors.initials: M
authors.lastname: Zheng
authors.affiliation: Department of Maxillofacial Surgery, The Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
authors.forename: Xiaozhang
authors.initials: X
authors.lastname: Liang
authors.affiliation: Department of Maxillofacial Surgery, The Second Affiliated Hospital of Zhejiang University, Zhejiang, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Department of Orthodontics, Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China. Electronic address: wzmczy@126.com.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D000328:Adult; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D009909:Oral Health; D009971:Orthodontics, Corrective; D056948:Orthognathic Surgical Procedures; D017060:Patient Satisfaction; D011788:Quality of Life; D011795:Surveys and Questionnaires