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 .
30-Month randomised clinical trial to evaluate the clinical performance of a nanofill and a nanohybrid composite.
OBJECTIVE To evaluate the clinical performance of a nanofill and a nanohybrid composite in restorations in occlusal cavities of posterior teeth in a r and omised trial over 30 months . METHODS Forty-one adolescents participated in the study . The teeth were restored with a nanofill ( Filtek Z350 , 3 M ESPE ) , a nanohybrid ( Esthet-X , Dentsply ) ; Filtek Z250 ( 3 M ESPE ) was used as a control . After 30 months , the restorations were evaluated in accordance with the US Public Health Service ( USPHS ) modified criteria . The McNemar and Friedman tests were used for statistical analysis , at a level of significance of 5 % . RESULTS There were significant differences in the roughness of Filtek Z250 ( p=0.008 ) and Filtek Z350 ( p<0.001 ) when the four time periods ( baseline , 6 months , 12 months and 30 months ) were compared . There were significant differences in the marginal adaptation of Filtek Z250 ( p=0.001 ) , Filtek Z350 ( p<0.001 ) and Esthet-X ( p=0.011 ) . Except for one of each composite restoration , all the modifications ranged from Alpha to Bravo . There were significant differences in the surface roughness ( p=0.005 ) when the three composites were compared after 30 months . CONCLUSIONS The material s investigated showed acceptable clinical performance after 30 months . Long-term re-evaluations are necessary for a more detailed analysis of these composites ( CEP : # 1252 )
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 .