Title: 0876 - Clinical Evaluation of CAD/CAM Indirect Zirconia Restorations: 1-year Results
Mariela Tsanova (Presenter)
Medical University of Plovdiv, Faculty of Dental Medicine
Neshka Manchorova-Veleva, Medical University of Plovdiv, Faculty of Dental Medicine
Plamen Zagorchev, Medical University of Plovdiv
Snejana Tsanova, Medical University of Plovdiv, Faculty of Dental Medicine
Objectives: The aim of our study was to assess prospectively the clinical performance of CAD/CAM indirect zirconia restorations of vastly destroyed vital molars after a service period up to 1 year.
Methods: Thirty-two indirect Y-TZP zirconia restorations were placed on severely destroyed molars of 19 patients. Thermal and electrical tests for pulp vitality were performed. Pre-operative and post-operative (after cementation) radiographs , as well as intraoral colour digital photographs were taken. Cvar and Ryge criteria were used for direct clinical evaluation of each restoration immediately after cementation and at the 12-th month. All results were recorded in specially designed individual cards for each patient and processed statistically.
Results: Post-operative sensitivity was found in only one of the teeth immediately after cementing the restoration, which has passed after a period of 1 week. A partial fracture was observed in one of the restorations after the sixth month, but the restoration was still clinically acceptable and did not show signs of requiring a replacement. All other inlays/ onlays showed the highest grade of clinical performance. The thermal and electrical pulp tests at the 12-th month were within normal range for vital posterior teeth.
Conclusions: Within the limitation of our clinical study, we can draw the conclusion that the new zirconia ceramics are highly promising materials for successful biomimetic restoring of distal areas.
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: The materials, discussed in the study, were supplied by the manufacturers Kuraray Noritake Dental Inc.