<i>In vitro</i> analysis of residual tooth structure of maxillary anterior teeth after different prosthetic finish line preparations for full-coverage single crowns
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- Borelli Bruna
- Department of Fixed Prosthodontics and Dental Materials, Tuscany School of Dental Medicine, University of Florence and Siena Department of Prosthodontics, University of Naples “Federico II”
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- Sorrentino Roberto
- Department of Prosthodontics, University of Naples “Federico II”
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- Goracci Cecilia
- Department of Fixed Prosthodontics and Dental Materials, Tuscany School of Dental Medicine, University of Florence and Siena
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- Zarone Fernando
- Department of Prosthodontics, University of Naples “Federico II”
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- Ferrari Marco
- Department of Fixed Prosthodontics and Dental Materials, Tuscany School of Dental Medicine, University of Florence and Siena
Bibliographic Information
- Other Title
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- In vitro analysis of residual tooth structure of maxillary anterior teeth after different prosthetic finish line preparations for full-coverage single crowns
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Abstract
To evaluate residual dentin thickness (RDT) after different tooth preparations, 90 sound maxillary anterior teeth were selected and divided into 3 groups according to tooth type (n = 30), namely, maxillary central incisors, maxillary lateral incisors, and maxillary canines. In each group, specimens were randomly divided and prepared for single-crown coverage with shoulder (SHO, n = 10, control), slight chamfer (CHA, n = 10), and knife-edge (KNE, n = 10) finish lines. After tooth preparation, specimens were sectioned and divided into 4 subgroups (buccal, distal, palatal, and mesial) according to measurement area. RDT values were compared by using one-way ANOVA and Tukey’s post hoc test (P = 0.05). Significant differences were found between SHO and the other two groups (P < 0.05) but not between CHA and KNE (P > 0.05). SHO was significantly more aggressive than CHA and KNE, which were comparable. Interproximal areas became critical due to thin RDT, which could potentially compromise the structural and biological integrity of teeth. The choice of finish line should be guided by careful clinical evaluation. (J Oral Sci 55, 79-84, 2013)
Journal
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- Journal of Oral Science
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Journal of Oral Science 55 (1), 79-84, 2013
Nihon University School of Dentistry