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 .
Clinical evaluation of two "packable" posterior composite resins: two-year results
The purpose of this study was to evaluate the clinical performance of two " packable " posterior composites : Prodigy Condensable/Optibond Solo — Kerr ( PC-OS ) and Definite/Etch & Prime — Degussa ( D-EP ) .  Thirty-six patients participated in this study . A total of 78 restorations ( 40 with D-EP  and 38 with  PC-OS ) were made . Each patient received at least two restorations ( one of each studied material ) . The material s were h and led according to the manufacturer 's instructions . The occlusal adjustments were made at the placement visit . The restorations were finished and polished after 1 week . They were evaluated at baseline , and after 1 year and 2 years by two independent evaluators using the USPHS criteria . Colored slides were made of all the restorations . After 2 years , 34 patients and 74 restorations ( 38 with D-EP and 36 with PC-OS ) were available for evaluation . A total of 50 % of PC-OS restorations received A criterion and 50 % received B criterion ( 2.8 % color , 11.1 % marginal staining , 27.8 % superficial staining , 2.8 % anatomic form and 5.6 % marginal adaptation ) . For D-EP , 60.5 % of restorations received A criterion and 39.5 % received B criterion ( 2.6 % color , 5.3 % marginal staining , 10.5 % superficial staining , 7.9 % anatomic form and 13.2 % marginal adaptation ) . The C criterion was observed only for marginal adaptation with D-EP ( 2 restorations—5.3 % ) . The obtained data were tabulated and statistically analyzed using the Fisher , Chi-square and McNemar tests . After 2 years , PC-OS showed a significant increase in superficial and marginal staining . For D-EP the marginal adaptation and superficial staining became significantly worse than baseline
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 .