IADR Abstract Archives
Six-year Clinical Performance of a 2-step Self-etch Adhesive in Non-carious Cervical Lesions.
Objectives: Mild and intermediately strong 2-step self-etch adhesives (2SEa) have been shown to bond efficiently to dentin. In general, their bonding efficiency to enamel is inferior to that of etch&rinse adhesives (E&Ra). Nevertheless, their application procedure is less elaborate and leaves consequently less room for application mistakes. The aim of this randomized controlled trial was to evaluate the clinical performance of an intermediately strong 2SEa, as compared with that of a 3-step E&Ra after 6 years of clinical functioning.
Methods: 239 non-carious cervical lesions in 50 patients were restored with the micro-hybrid composite Herculite XRV (Kerr), bonded in random order either with the 2SEa Optibond XTR (‘OXTR’; Kerr) or the gold-standard 3E&Ra control Optibond FL (‘OFL’; Kerr). The restorations were evaluated after 1, 2 and 6 years of clinical service for retention, marginal adaptation, marginal discoloration, caries occurrence and tooth sensitivity. Statistical analysis was done using a logistic regression model with generalized estimating equations (2-way GEE model).
Results: The patient recall rate at 6 years was 94%. The overall clinical success rate was 81.9% and 80.7% for OXTR and OFL, respectively. In total, 42 restorations (21 OXTR, 21 OFL) failed because of retention loss, severe abfraction, severe marginal defects and/or discoloration and/or caries. A retention rate of 93.1% and 89,0% was recorded for OXTR and OFL respectively. The 6-year results for marginal integrity (in %) are presented in the Table. Six OXTR and four OFL restorations revealed caries at the restoration margin. No significant difference was observed between both groups for none of the evaluated parameters (p>0.05).
Conclusions: After 6 years of clinical service, class V restorations bonded with the 2SEa performed clinically equally successful as those bonded with the 3E&Ra.
Methods: 239 non-carious cervical lesions in 50 patients were restored with the micro-hybrid composite Herculite XRV (Kerr), bonded in random order either with the 2SEa Optibond XTR (‘OXTR’; Kerr) or the gold-standard 3E&Ra control Optibond FL (‘OFL’; Kerr). The restorations were evaluated after 1, 2 and 6 years of clinical service for retention, marginal adaptation, marginal discoloration, caries occurrence and tooth sensitivity. Statistical analysis was done using a logistic regression model with generalized estimating equations (2-way GEE model).
Results: The patient recall rate at 6 years was 94%. The overall clinical success rate was 81.9% and 80.7% for OXTR and OFL, respectively. In total, 42 restorations (21 OXTR, 21 OFL) failed because of retention loss, severe abfraction, severe marginal defects and/or discoloration and/or caries. A retention rate of 93.1% and 89,0% was recorded for OXTR and OFL respectively. The 6-year results for marginal integrity (in %) are presented in the Table. Six OXTR and four OFL restorations revealed caries at the restoration margin. No significant difference was observed between both groups for none of the evaluated parameters (p>0.05).
Conclusions: After 6 years of clinical service, class V restorations bonded with the 2SEa performed clinically equally successful as those bonded with the 3E&Ra.