Clinical Performance of Diopside-Based Ceramic on Endodontically Treated Posterior Teeth

Objectives: The objective of this study was to evaluate long-term clinical performance of a diopside-based hot-pressed ceramic restorations on endodontically treated posterior teeth. Methods: Fourteen patients with ages ranging from 20 to 50 years (mean: 36.2 years) were selected to receive the ceramic restorations (Ceraeste, Tokuyama Dental, Tokyo, Japan). Twenty-one ceramic restorations including 14 inlays/onlays (5 premolars, 9 molars) and 7 crowns (2 premolars, 5 molars) were cemented on endodontically treated posterior teeth with an adhesive resin composite cement (Bistite II, Tokuyama Dental) and a silane coupling agent (Tokuso Ceramic Primer, Tokuyama Dental). Clinical performance of the restorations for long term ranging from 22 to 44 months (mean: 34.2 months) was evaluated in 8 categories according to modified USPHS criteria. Results: Results of the twenty restorations evaluated as acceptable were, discoloration: 18 alfa and 2 bravo, surface roughness: 16 alfa and 4 bravo, marginal staining: 19 alfa and 1 bravo, marginal adaptation: 17 alfa and 3 bravo, wear: 19 alfa and 1 bravo, and wear in opposing tooth: 20 alfa and 0 bravo. One onlay on maxillary premolar was evaluated as failure due to body fracture. The fractured portion came off at 36 months. Conclusions: Within the limitation of this study, the clinical performance of the diopside-based hot-pressed ceramic was satisfactory for posterior restoration. This study was performed with the approval of Tsurumi University Ethical committee.