Retrospective evaluation of posterior direct composite restorations: 10-Year findings

AbstractObjectives 0-year retrospective study investigated the differences in the changes and the longevity of Class II restorations using 4 similar microhybrid resin composites (Filtek Z250, Herculite XR, Gradia Direct Posterior, Renew). s ere collected from patient records. Those patients who received posterior restoration between 2001 and 2003, and who still visited the clinical practice for regular check-up visits were selected. A total of 225 adult patients (86 males, 139 females) with 701 restorations were evaluated by 2 operators using the USPHS criteria. Data were analyzed with Fisherʹs Exact Test, Pearsonʹs Chi-Square Test and Kaplan–Meier analysis (p < 0.05). s ure rate of 2.1% was detected. The reasons of failures included restoration fracture, secondary caries and endodontic treatment. Similar survival rates for Gradia Direct Posterior (91.25%) and Renew (92.19%) were observed; better performance was observed with the Filtek Z250 (99.1%) and Herculite XR (98.64%). There was a higher probability of failure in 3 surface (n = 10) than in 2 surface (n = 5) restorations (p < 0.001), and this rate was similar when molars (n = 8) and premolars (n = 7) were compared. The most frequent but clinically acceptable deficiency was the marginal discoloration. icance ur microhybrid resin composites showed acceptable clinical durability in Class II restorations during the 10-year follow-up period, with an overall survival rate of >97.8%. Higher rates of failures and deficiencies were observed with the Renew (fracture) and Gradia Direct Posterior (color match), respectively.