Clinical performance of two different CAD/CAM-fabricated ceramic crowns: 2-Year results
Statement of problem - Recently, technical problems, especially chipping, have been reported for ceramic restorations; as a result, ceramic crowns produced entirely by computer-aided design and computer-aided manufacture (CAD/CAM) have become popular because the incidence of chipping is less. - Purp...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
30 April 2015
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| In: |
The journal of prosthetic dentistry
Year: 2015, Jahrgang: 114, Heft: 2, Pages: 212-216 |
| ISSN: | 1097-6841 |
| DOI: | 10.1016/j.prosdent.2015.02.016 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.prosdent.2015.02.016 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0022391315001195 
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| Verfasserangaben: | Bodo Seydler, Dr med dent and Marc Schmitter, Prof Dr med dent |
MARC
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| 520 | |a Statement of problem - Recently, technical problems, especially chipping, have been reported for ceramic restorations; as a result, ceramic crowns produced entirely by computer-aided design and computer-aided manufacture (CAD/CAM) have become popular because the incidence of chipping is less. - Purpose - The purpose of this study was to report on 2-year results for 2 different types of CAD/CAM ceramic crowns placed in adult patients in a dental practice. - Material and methods - Sixty participants who required a crown for a first or second molar were randomly assigned to 1 of 2 groups. Crowns in the veneered zirconia (VZ) group were made of zirconia frameworks veneered with CAD/CAM-produced lithium disilicate ceramic; the other group’s crowns were made of monolithic lithium disilicate (MLD) ceramic. Each crown was reviewed after 2 weeks, 1 year, and 2 years by using modified the US Public Health Service (USPHS) criteria. Statistical analysis was performed by using the log-rank test, nonparametric tests, and Kaplan-Meier survival analysis. - Results - All 60 participants were recalled after 1 and 2 years. In the VZ group, 2 endodontic complications occurred, and deterioration of periodontal health was observed for 3 participants. In the MLD group, 2 endodontic complications occurred within 2 years. In both of the groups, no caries or marginal discoloration was observed. No technical complications, for example, cracks, chipping, or fractures, were detected after 2 years. The shape and appearance of all crowns were assessed positively by the examining dentist. The log-rank test showed no significant differences in respect to technical or biologic complications (P=.324). - Conclusion - For both types of single-crown restoration, no technical failures occurred. The number of biological complications did not differ significantly between the types of crowns. | ||
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