Three-Year Clinical Evaluation of Class II Posterior Composite Restorations Placed With Different Techniques and Flowable Composite Linings in Endodontically Treated Teeth

Forty-seven pairs Class II (mesio-occlusal or disto-occlusal) composite restorations were placed in 37 patients. In all cavities, Adper Single Bond 2 was used. In one of the cavities of each pair, a conventional flowable composite, Aelite Flo, was applied in approximately 2mm thick, and the remaining cavity was restored incrementally with GrandioSO. In the second cavity, a bulk-fill flowable composite, x-tra base, was applied in approximately 4 mm thick in bulk increments and the remaining 2mm occlusal part of the cavity was restored with GrandioSO. All cavities were restored with open-sandwich technique by the same operator. At baseline and after 6-month, 1-, 2- and 3-year follow-up visits, restorations were evaluated by Modified USPHS criteria.