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 .
The effect of adhesive and flowable composite on postoperative sensitivity: 2-week results.
OBJECTIVE To measure 2-week postoperative sensitivity in Class II composite restorations placed with a self-etching adhesive ( Clearfil SE Bond ) or a total-etch adhesive ( Prime&Bond NT ) with or without a flowable composite as cervical increment . METHOD AND MATERIAL S Upon approval by the University of Guarulhos Committee on Human Subjects , 100 restorations were inserted in 46 patients who required Class II restorations in their molars and premolars . Enamel and dentin walls were conditioned with a self-etching primer ( for Clearfil SE Bond ) or etched with 34 % phosphoric acid ( for Prime&Bond NT ) . A 1- to 2-mm-thick increment of a flowable composite ( Filtek Flow ) was used in the proximal box in 50 % of the restorations of each adhesive . Preparations were restored with a packable composite ( Surefil ) . The restorations were evaluated preoperatively and 2 weeks postoperatively for sensitivity to cold , air , and masticatory forces using a visual analog scale . Marginal integrity of the accessible margins was also evaluated . Statistical analysis used a mixed linear model with subject as a r and om effect . RESULTS Ninety-eight teeth from 44 subjects were observed at 2 weeks . The type of adhesive and use of flowable composite had no significant effects or interaction for any of the four outcomes of interest , ie , change from baseline to 2 weeks in sensitivity and response time for the cold or air stimulus . For the air stimulus , the overall average change from baseline was not significant for either sensitivity or response time . For the cold stimulus , the overall average change from baseline was significant for both sensitivity and response time . No case of sensitivity to masticatory forces was observed . CONCLUSION No differences in postoperative sensitivity were observed between a self-etch adhesive and a total-etch adhesive at 2 weeks . The use of flowable composite did not decrease postoperative sensitivity
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 .