CASE 4 A 54-year-old patient presented for replacement of failing amalgam on #12. Fig. 21: 49-month postop evaluation. Fig. 16: Preop image of failing amalgam on #12. Note the fractured mesial marginal ridge. Figs. 19a and Fig. 19b: 22-month postoperative evaluation, with two views of the restored #12. Fig. 17: Prepared tooth. Note calla lilyshaped cavosurface margins with no sharp angles. This enables a wraparound effect with the cured restorative material supported by tooth structure at the margins. Fig. 18: Finished and polished Activa Bioactive-Restorative composite. 74 AUGUST 2017 // dentaltown.com Fig. 20a and Fig. 20b: 38-month postoperative evaluation with two views of the restored tooth. Fig. 22: 53-month postop evaluation..http://www.dentaltown.com