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 .
Eight-year clinical evaluation of a 2-step self-etch adhesive with and without selective enamel etching.
OBJECTIVES The objective of this r and omized controlled clinical trial was to evaluate the 8-year clinical performance of a mild 2-step self-etch adhesive in non-carious Class-V lesions with and without prior selective phosphoric acid-etching of the enamel cavity margins . METHODS A total of 100 non-carious Class-V lesions in 29 patients were restored with Clearfil AP-X ( Kuraray ) .  The composite restorations were bonded following two different approaches : ( 1 ) application of Clearfil SE ( Kuraray ) following a self-etch approach ( control group ; C-SE non-etch ) , ( 2 ) selective phosphoric acid-etching of the enamel cavity margins before application of Clearfil SE ( experimental group ; C-SE etch ) . The restorations were evaluated after 6 months , 1 , 2 , 3 , 5 and 8 years of clinical service regarding their retention , marginal integrity and discoloration , caries occurrence , preservation of tooth vitality and post-operative sensitivity . RESULTS The recall rate at 8 years was 76 % . Only two restorations , one of the C-SE non-etch group and one of the C-SE etch group , were clinical ly unacceptable due to loss of retention leading to a retention rate and a clinical success rate of 97 % in both groups . Aging of the restorations was characterized by an increase in the percentage of restorations with a small but clinical ly acceptable marginal defect ( C-SE non-etch : 92 % ; C-SE etch : 84 % ) and /or a superficial marginal discoloration ( C-SE non-etch : 44 % ; C-SE etch : 28 % ) . At the enamel side , the presence of small marginal defects ( C-SE non-etch : 86 % ; C-SE etch : 65 % ) and superficial marginal discoloration ( C-SE non-etch : 11 % ; C-SE etch% ) was more frequently noticed in the control group than in the experimental group . The difference , however , was only statistically significant for the presence of superficial marginal discoloration ( McNemar , p=0.01 ) . SIGNIFICANCE After 8 years of clinical functioning , the clinical effectiveness of Clearfil SE remained excellent , with selective acid-etching of the enamel cavity margins only having some minor positive effect on marginal integrity and absence of marginal discoloration at enamel
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 .