No overall effect was revealed in the meta-analyses , meaning that no influence of the  ER or SE strategy on POS .
SIGNIFICANCE The type of adhesive strategy ( ER or SE ) for posterior resin composite restorations does not influence the risk and intensity of POS .
OBJECTIVES A systematic review and meta- analysis were performed on the risk and intensity of postoperative sensitivity ( POS ) in posterior resin composite restorations bonded with self-etch ( SE ) and etch- and -rinse ( ER ) adhesives .
Evaluation of resin composite materials. Part II: in vivo investigations.
PURPOSE To clinical ly evaluate two different resin-based composites ( Solitaire I and Ariston pHc )  in order to determine the minimum clinical evaluation time needed to detect critical signs of failure . METHODS In a controlled prospect i ve clinical study , 99 cavities ( 30 Class I , 69 Class II ) in 31 patients were restored ( 50 Ariston pHc without enamel etching and rubber dam , 49 Solitaire I restorations with total etching and rubber dam )  and clinical ly investigated at baseline , after 6 , 12 , and 24 months . RESULTS After 2 years of clinical service , 49 restorations ( Ariston pHc : n = 38 , Solitaire : n = 11 ) had to be replaced . The majority of failures occurred after more than 1.5 years . The reasons for replacement were differently distributed in both groups ( Ariston pHc : 28 tooth fractures , 3 gap formations , 5 hypersensitivities , 1 bulk fracture , 1 marginal fracture . Solitaire : 5 gap formations , 1 hypersensitivity , 3 bulk fractures , 1 wear of the restorative material , 1 void in the restoration ) . Forty-four restorations were still in function after 2 years ( overall failure rate after 2 years : 14 % ; Ariston pHc : 17 % ; Solitaire : 7 % ; survival analysis algorithm according to Kaplan/Meier ) . Comparing the material s , no statistical differences were evident except for the criteria " integrity tooth " (= tooth fracture or cracks ) and " hypersensitivity " ( from the 12-month recall ; Mann-Whitney U-test ; P < 0.05 ) . In both cases of significant difference , Ariston pHc exhibited inferior results . After 2 years , only three teeth restored with Ariston pHc did not show considerably cracked enamel . The additional marginal analysis showed statistically significant differences for both material s regarding the criteria " perfect margin " ( decrease ) , " gap formation " ( increase ) , and " negative step formation " ( increase ; P < 0.05 ; Friedman 2-way ANOVA ) between the four recalls . Therefore , a 2-year in vivo evaluation should be recommended prior to marketing a dental restorative material
No overall effect was revealed in the meta-analyses , meaning that no influence of the  ER or SE strategy on POS .
SIGNIFICANCE The type of adhesive strategy ( ER or SE ) for posterior resin composite restorations does not influence the risk and intensity of POS .
OBJECTIVES A systematic review and meta- analysis were performed on the risk and intensity of postoperative sensitivity ( POS ) in posterior resin composite restorations bonded with self-etch ( SE ) and etch- and -rinse ( ER ) adhesives .