There is not enough evidence to support the bevelled technique over non-bevelled for NCCLs over longer periods of time .
OBJECTIVES To identify if enamel bevelling , compared to no treatment , improves the retention rates and marginal discolouration of cervical composite restorations in non-carious cervical lesions ( NCCLs ) of adult patients , through a systematic review of the literature and meta- analysis .
Effect of resin viscosity and enamel beveling on the clinical performance of Class V composite restorations: three-year results.
This study evaluated the effect of the elastic modulus and margin configuration on the clinical performance of  resin-based composite restorations in Class V non-carious defects . One hundred and five cervical non-carious defects on buccal surfaces of canines and premolars were included in this study . Defects were r and omly divided into three Groups and restored according to the following techniques : Group 1 - -no enamel bevel was placed and the defect was restored with a microfilled resin-based composite ( Durafill VS ) ; Group 2 - -the enamel margin was beveled and the defect restored as in Group 1 ; Group 3-the enamel margin was beveled and the defect was restored with a flowable resin-based composite ( Natural Flow ) . Each group comprised 35 lesions . A total-etch , one-bottle adhesive ( One-Step ) was used in all groups . Retention rate , pre- and post-operative sensitivity , marginal discoloration and secondary caries were determined over a three-year period and the data were analyzed statistically . At six months post-insertion , the restorations placed with beveled enamel margins result ed in 100 % retention regardless of the composite used compared to a 66 % retention of the non-beveled margins . At two and three years , no significant difference in retention rate was found among the three groups . Post-operative sensitivity , marginal discoloration and secondary caries were not affected by enamel beveling and restorative material . Beveled enamel margins result ed in significantly better clinical retention in the first six months only . Enamel beveling and composite viscosity appeared to not significantly affect the clinical performance of Class V non-retentive composite restorations after three years
There is not enough evidence to support the bevelled technique over non-bevelled for NCCLs over longer periods of time .
OBJECTIVES To identify if enamel bevelling , compared to no treatment , improves the retention rates and marginal discolouration of cervical composite restorations in non-carious cervical lesions ( NCCLs ) of adult patients , through a systematic review of the literature and meta- analysis .