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.

Disclosure Statement:
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.