Class II restorations with a polyacid-modified composite resin in primary molars placed in a dental practice: Results of a two-year clinical evaluation

This study evaluated the two-year success rate of a hybrid composite materi al (TPH-Spectrum(R); Dentsply DeTrey, Konstanz, Germany) and a polyacid-mod ified composite resin (Compoglass(R), Vivadent, Schaan, Liechtenstein) in C lass II restorations placed in primary molars in a dental practice. In each of 52 children, at least two primary molars were restored. Ninety-six prim ary molars were filled with TPH-Spectrum(R) using the total-etching techniq ue, and 94 with Compoglass(R) without acid etching prior to application of the bonding adhesive. At baseline, one and two years, the restorations were assessed according to the Ryge criteria. Forty-seven children with a total of 132 fillings (68 TPH-Spectrum, 64 Compoglass) were evaluated after two years. The cumulative success rate after 24 months amounted to 89.2% for th e Compoglass and 89.7% for the TPH-Spectrum restorations. No significant di fferences were observed between the two materials with respect to color mat ching, cavosurface discoloration, anatomic form, margin integrity and carie s assessment. This investigation suggests that for a period of two years, the hybrid comp osite TPH-Spectrum and the polyacid-modified composite resin Compoglass, ar e suitable materials for restoration of primary molars.