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The marginal fit of lithium disilicate crowns: Press vs. CAD/CAM
B. Azar, S. Eckert, J. Kunkela, T. Ingr, R. Mounajjed,
Language English Country Brazil
Document type Comparative Study, Journal Article
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- MeSH
- Computer-Aided Design * MeSH
- Humans MeSH
- Dental Impression Materials MeSH
- Statistics, Nonparametric MeSH
- Reference Values MeSH
- Reference Standards MeSH
- Reproducibility of Results MeSH
- Materials Testing MeSH
- Crowns standards MeSH
- Dental Marginal Adaptation standards MeSH
- Dental Porcelain chemistry MeSH
- Dental Prosthesis Design MeSH
- Dental Impression Technique * MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Comparative Study MeSH
This study aimed to compare the vertical marginal gap of teeth restored with lithium disilicate crowns fabricated using CAD/CAM or by pressed ceramic approach. Twenty mandibular third molar teeth were collected after surgical extractions and prepared to receive full veneer crowns. Teeth were optically scanned and lithium disilicate blocks were used to fabricate crowns using CAD/CAM technique. Polyvinyl siloxane impressions of the prepared teeth were made and monolithic pressed lithium disilicate crowns were fabricated. The marginal gap was measured using optical microscope at 200× magnification (Keyence VHX-5000, Japan). Statistical analysis was performed using Wilcoxon test. The lithium disilicate pressed crowns had significantly smaller (p = 0.006) marginal gaps (38 ± 12 μm) than the lithium disilicate CAD/CAM crowns (45 ± 12 μm). This research indicates that lithium disilicate crowns fabricated with the press technique have measurably smaller marginal gaps compared with those fabricated with CAD/CAM technique within in vitro environments. The marginal gaps achieved by the crowns across all groups were within a clinically acceptable range.
Department of Experimental Physics Faculty of Science Palacky University Olomouc Czech Republic
Institute of Dentistry and Oral Sciences Palacky University Olomouc Czech Republic
References provided by Crossref.org
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