Impact of complications of single tooth fixed restorations on OHRQoL

Abstract

OBJECTIVES: To compare oral health-related quality of life (OHRQoL) among subjects treated with implant supported crowns (ISC) and 2-unit cantilevered resin bonded bridges (cRBB), and to investigate factors associated with their OHRQoL. METHODS: A case-control study was conducted of subjects who had received ISC or cRBB treatments. Clinical examination and interview was undertaken to determinate restoration status. OHRQoL was assessed using the Oral Health Impact Profile (OHIP) and analysed by Mann-Whitney U-test and Kruskal-Wallis one-way ANOVA. Negative binominal regression was conducted to investigate the factors associated with OHIP-49 score. RESULTS: 78 subjects controlled with restoration age and location were recruited (39 ISCs and 39 cRBBs). There are no significant difference in OHIP scores between ISC and cRBB (P>0.05) and between survived and failed (Failure Complication, FC) (P>0.05). There is significant higher score in domain physical disability for success (No Complication, NC) than presence of complications i.e. poorer OHRQoL (P=0.005). These survived but not success (Non-Failure Complication, NFC) have lowest OHIP-49 score (P=0.017). For ISCs, while NFC has only lower score in domain physical pain than NC, it has lower scores in domain functional limitation, physical pain, handicap and OHIP-49 score than FC (P<0.05). For cRBBs, NFC has lower score in domain physical disabilitythan NC (P=0.006). Regression analysis suggested the NFC (when compared to NC) was significantly associated with OHIP-49 score with a rate ratio 0.79 (unadjusted, CI: 0.69 – 0.91) and 0.81 (adjusted, CI: 0.70 – 0.94) (P<0.05). CONCLUSIONS: ISC and cRBB show similar overall impact to OHRQoL. The impact of complications may vary between ISC and cRBB. However NFC may not have negative impact on subject’s OHRQoL.