Evaluation of the fit of zirconia three-unit fixed partial dentures fabricated by different impression techniques
| Autor: | Emad AlShwaimi, Ziad Salameh, Marco Ferrari, Ghassan Moustapha, Munir Silwadi, Khaled Azzam |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Orthodontics
Chamfer Typodont Dental Impression Technique Crowns 030206 dentistry General Medicine Dental Marginal Adaptation Impression 03 medical and health sciences 0302 clinical medicine Dental impression Dental Prosthesis Design Group (periodic table) 030220 oncology & carcinogenesis Computer-Aided Design Denture Partial Fixed Maxillary central incisor Cubic zirconia Zirconium Unit (ring theory) Mathematics |
| Zdroj: | Journal of investigative and clinical dentistry. 10(3) |
| ISSN: | 2041-1626 |
| Popis: | AIM The aim of the present study was to evaluate the marginal and internal fit of zirconium fixed partial denture using different impression techniques. METHODS A Nissin Typodont model, including maxillary central incisor and canine with missing lateral incisor, was selected for the present study. Thirty zirconium frameworks were fabricated following three impression techniques (N = 10), conventional silicone impression (group C), scanned dental impression (group S), and Trios 3 (3Shape) intraoral scanner (group T). An extra-fine milling strategy was applied. RESULTS Group T had the smallest discrepancy compared to groups C (P = 0.006) and S (P = 0.052) at the marginal level, whereas it was larger at the incisal tip. Discrepancies in group T were smaller than group C (P = 0.004) when measured at the axial walls, and smaller than group S (P = 0.045) when measured at the chamfer area for the central teeth only. Samples in group T showed a greater percentage of equally extended restorations (52.5%), while other groups were mainly underextended (group C: 63.7%, group S: 68.8%). CONCLUSION Better adaptation was achieved with the intraoral scanner group, except at the incisal tip. Conventional and scanned impressions revealed a greater percentage of underextended restorations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text