title: Impact of complications of single tooth restorations on oral health-related quality of life.
abstract: OBJECTIVE
  To compare oral health-related quality of life (OHRQoL) among subjects who received implant-supported crowns (ISC) and 2-unit cantilevered resin-bonded bridges (cRBB) in a bounded single tooth space (BSTS) after at least 5 years and to investigate factors associated with their OHRQoL.
  
  
  METHODS
  A case-control study among 78 subjects who received ISC or cRBB rehabilitation at a teaching hospital (39 ISCs and 39 cRBBs). OHRQoL was measured using the Oral Health Impact Profile (OHIP-49) and compared between treatment modality. Variations in OHIP scores with respect to "minor complications" (repair of the original "survived" restorations) and "major complications" (replacement of "failed" restorations); and number of complications were determined in bivariate and multivariate analyses (negative binominal regression) controlling for socio-demographic and clinical factors.
  
  
  RESULTS
  Oral Health Impact Profile scores were similar among those who received ISC and cRBB (P = 0.53). Among subjects with complicated restorations, those with major complications reported significantly higher OHIP scores (poorer OHRQoL) than those with minor complications (P = 0.02). Subjects who experienced multiple complications had significantly higher OHIP scores (poorer OHRQoL) than those with a single complication (P = 0.04). In regression analyses (which considered OHIP scores of those with complications), the nature of complications (P < 0.01), treatment modality (P = 0.04), and gender (P = 0.02) emerged as significant factors.
  
  
  CONCLUSIONS
  In the rehabilitation of a BSTS patients, OHRQoL was similar irrespective of treatment modality (ISC or cRBB). Among those who experienced complications their OHRQoL was associated with the nature of complications, treatment modality and gender.
authors.affiliation: Oral Rehabilitation, Faculty of Dentistry, University of Hong Kong, Hong Kong, China.
authors.forename: Walter Y H
authors.initials: WY
authors.lastname: Lam
authors.forename: Colman P J
authors.initials: CP
authors.lastname: McGrath
authors.forename: Michael G
authors.initials: MG
authors.lastname: Botelho
mesh_terms: D016022:Case-Control Studies; D003442:Crowns / Q000009:adverse effects; D019094:Dental Prosthesis, Implant-Supported / Q000009:adverse effects; D016379:Denture, Partial, Fixed, Resin-Bonded / Q000009:adverse effects; D005260:Female; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation*; D008297:Male; D008875:Middle Aged; D009909:Oral Health; D017060:Patient Satisfaction; D011788:Quality of Life; D016896:Treatment Outcome
keywords: Oral Health Impact Profile; bounded edentulous space; complications; dental implants; failures; fixed dental prostheses; oral health-related quality of life; patient satisfaction; resin-bonded bridges; single crowns; success; survival