Does a new formula have an input in the clinical success of posterior composite restorations? A chat study

Objective To compare the clinical behavior of a universal light-curing, ultra-fine particle hybrid composite and successor of this material in class I and II cavities after 60 months. Materials and methods Forty patients (21 females, 19 males) with ages ranging between 18 and 38 years (23.15 ± 5.15) received 80 (13 Cl I and 67 Cl II) resin composite restorations (Charisma/Charisma Classic, Kulzer GmbH) in combination with an etch and rinse adhesive system (Gluma 2Bond) under rubber dam isolation. Two experienced operators performed all the restorations. Restorations were evaluated by the other two examiners according to the FDI criteria at baseline and at 6, 12, 18, 24, 36, 48 and 60 months. Surface characteristics of one restoration selected randomly were examined under a scanning electron microscope (SEM) at each recall. Data were analyzed statistically ( p 0.05). SEM evaluations were in accordance with the clinical findings. Conclusions Both materials exhibited clinically similar and successful performance over the 60-month observation period. Clinical relevance A new formulation of resin composite may not always perform better clinical performances. Trial registration ClinicalTrials.gov : NCT02888873