Zlatanovska, Katerina and Dimova, Cena and Gigovski, Nikola and Korunoska Stevkovska, Vesna and Longurova, Natasa (2019) Fracture Localization of Porcelain Veneers with Different Preparation Designs. Open Access Macedonian Journal of Medical Sciences, 7 (10). pp. 1675-1679. ISSN 1857-9655 (online)
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Abstract
Introduction: Porcelain veneers are permanent restorations that combine good aesthetic with functionality by minimal destructive techniques. The aim of this study was to investigate the influence of the preparation designs on the fracture localization.
Materials and method: Three preparation designs of porcelain veneers fabricated by a method of laying on a fireproof abutment on maxillary central incisor were examined in this in vitro study - feather preparation, bevel preparation and incisal overlap – palatal chamfer. The samples from all three groups were loaded into a universal test machine - TRITECH WF 10056 until damage occurred on the porcelain veneer. Fracture localization was classified as an incisal, gingival or combination. Data were analyzed with statistical programs: STATISTICA 7.1; SPSS 17.0.
Results: In feather preparation, as a consequence of the mechanical force, the most common is the incisal localization (66.7%), followed by the combined (33.3%), while the gingival fracture localization is not registered. In bevel preparation, the most common fracture localization is combined (53.6%), followed by incisal (35.7%) and subsequent gingival localization (10.7%). In incisal overlap (palatal chamfer), combined and gingival localization of the fracture is equally recorded in 14.3% of the samples, while the incisal is the most common localization and is registered in 72.4%.
Conclusion: During the study, a statistically significant dependence was found between the localization of the occurred changes (incisal, gingival and combination) and the three different types of preparation.
Key words: fracture localization, fracture resistance, porcelain veneers.
| Item Type: | Article |
|---|---|
| Subjects: | Medical and Health Sciences > Basic medicine Medical and Health Sciences > Health biotechnology |
| Divisions: | Faculty of Medical Science |
| Depositing User: | Katerina Zlatanovska |
| Date Deposited: | 24 Jun 2019 10:10 |
| Last Modified: | 24 Jun 2019 10:10 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/22174 |
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