title: Patient-reported outcome and its association with attachment type and bone volume in mandibular implant overdenture.
abstract: OBJECTIVE
  To determine oral health-related quality of life (OHRQoL) and denture satisfaction (DS) in patients provided with mandibular implant-supported overdentures (ISOD) retained by two different attachment types, and the association of mandibular bone volume with the change in patient-reported outcome, before and after implant treatment.
  
  
  METHODS
  Thirty-four patients (mean age 60.70  ±  8.7 years) received telescopic crown or locator attachments for ISOD and completed OHIP-14 (Malaysian version) and DS questionnaires, at baseline (T0) with new conventional complete dentures (CCD) and 3 months (T1) and 3 years (T2) after ISOD conversion. Mandibular bone volume was calculated from cone beam computed tomography (CBCT) datasets using Mimics software. Mean changes (MC) in OHIP-14 and DS at intervals were analyzed using the Wilcoxon signed-rank test and effect size (ES). The association of bone volume, implant attachment type, and other patient variables with the change in OHIP-14 and DS were determined using multivariate linear regression analysis.
  
  
  RESULTS
  The MC in OHIP-14 and DS scores from T0to T1and T2showed significant improvement with moderate and large ES, respectively. Regression analyses for the change in OHIP-14 score from T0to T2showed significant association with implant attachment type (P = 0.043), bone volume (P = 0.004), and baseline OHIP-14 (P = 0.001), while for DS, the association was only significant with baseline DS score (P = 0.001).
  
  
  CONCLUSIONS
  Improvement in patients' OHRQoL and satisfaction with ISOD was associated with their baseline ratings. Mandibular bone volume had a stronger association for improvement in OHRQoL compared to type of attachment.
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Taimur
authors.initials: T
authors.lastname: Khalid
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Norsiah
authors.identifier: http://orcid.org/0000-0002-9283-8956
authors.initials: N
authors.lastname: Yunus
authors.affiliation: Department of Oro-Maxillofacial and Medical Sciences, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Norliza
authors.initials: N
authors.lastname: Ibrahim
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Aeman
authors.initials: A
authors.lastname: Elkezza
authors.affiliation: Faculty of Dentistry, Center of Population Oral Health & Clinical Prevention Studies, Universiti Teknologi MARA, Selangor, Shah Alam, Malaysia.|Division of Population & Patient Health, King's College, London, UK.
authors.forename: Mohd
authors.initials: M
authors.lastname: Masood
mesh_terms: D000539:Alveolar Process / Q000473:pathology / Q000601:surgery; D003758:Dental Implantation, Endosseous / Q000379:methods; D019094:Dental Prosthesis, Implant-Supported; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D000071066:Patient Reported Outcome Measures; D017060:Patient Satisfaction; D011795:Surveys and Questionnaires; D016896:Treatment Outcome
keywords: imaging; patient centered outcomes; prosthodontics; radiology