title: Masticatory efficiency and oral health-related quality of life with implant-retained mandibular overdentures.
abstract: OBJECTIVE
  To evaluate masticatory efficiency (ME) and oral health-related quality of life (OHRQoL) in patients rehabilitated with implant-retained mandibular overdentures.
  
  
  METHODS
  In this randomized controlled clinical trial, 50 edentulous patients visiting the Implant Center and Department of Prosthodontics, West China College of Stomatology, Sichuan University, Chengdu, China between June 2010 and June 2012 were selected and received 2 implant-retained mandibular overdenture treatments. All patients were rehabilitated with maxillary complete dentures. The ME and OHRQoL were determined both one month before the mandibular complete denture was anchored to the osseointegrated implants, and 6 months after anchoring. Paired t-tests were used to compare means of ME, and oral health impact profile-49 (OHIP-49)  domains scores between pre- and post-implant. Linear regression models were utilized to seek correlations between ME and OHIP domains scores.
  
  
  RESULTS
  The ME increased from pre- to post-implant retained mandibular overdentures significantly (p&lt;0.001). The total OHIP score and 4 subscales scores were changed significantly from pre- to post-implant; namely, functional limitation, psychological discomfort, physical disability, and physical pain. The total OHIP score, functional limitation, physical disability, and physical pain subscale scores were related to ME.
  
  
  CONCLUSIONS
  Implant-retained mandibular over dentures can significantly improve patients' ME and OHRQoL. The improvement in OHRQoL is mainly because of the improved ME. An improved chewing experience, and pain relief also contributes to improvement of OHRQoL.
authors.affiliation: State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Sichuan, China. E-mail. 1348377660@qq.com.
authors.forename: Xu
authors.initials: X
authors.lastname: Sun
authors.forename: Jun-Jiang
authors.initials: JJ
authors.lastname: Zhai
authors.forename: Jian
authors.initials: J
authors.lastname: Liao
authors.forename: Min-Hua
authors.initials: MH
authors.lastname: Teng
authors.forename: Ai
authors.initials: A
authors.lastname: Tian
authors.forename: Xing
authors.initials: X
authors.lastname: Liang
mesh_terms: D000368:Aged; D015921:Dental Implants; D003824:Denture, Complete; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008334:Mandible; D008409:Mastication; D008437:Maxilla; D008875:Middle Aged; D009066:Mouth, Edentulous / Q000534:rehabilitation*; D009909:Oral Health; D011788:Quality of Life; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants