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 adhesive systems and bevel on enamel margin integrity in primary and permanent teeth.
PURPOSE This study compared the effectiveness of self-etch and total-etch adhesive systems in bonding to the beveled and nonbeveled margins of primary and permanent teeth . METHODS This in vitro , factorial- design ed study allowed evaluation of 3 factors : ( 1 ) tooth type ; ( 2 ) presence of a bevel ; and ( 3 ) adhesive type . Two preparations , each including a beveled and nonbeveled margin , were completed on buccal surfaces of 60 extracted molars ( 30 primary and 30 permanent ) . Preparations were r and omly assigned to self-etch or a total-etch adhesive system and restored with resin composite . After thermocycling , teeth were stained with silver nitrate , sectioned , and measured for microleakage . Statistical analysis used a repeated measures analysis of variance . RESULTS Beveled margins had less microleakage than nonbeveled margins for primary and permanent teeth ( P < .001 ) . Total-etch had less microleakage than self-etch adhesives on primary ( 53 % less , P < .001 ) and on permanent teeth ( 22 % less , P = .01 ) . Self-etch had considerably more microleakage when enamel margins were not beveled . Comparably less microleakage , however , was found for total-etch and self-etch in restorations with beveled margins . CONCLUSIONS Total-etch adhesive and beveled margins result ed in the least microleakage . Margin beveling has a greater effect in minimizing microleakage than the type of adhesive used
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 .