The influence of finish line curvature on the marginal gap width of ceramic copings
| Autor: | Chalermpol Leevailoj, Chutima Asavapanumas |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Surface Properties Dentistry Dental Abutments Curvature Vitallium Stereo microscope Humans Yttrium Maxillary central incisor Ceramic Composite material Anterior teeth Crowns business.industry Dental Impression Materials Finish line Dental Marginal Adaptation Tooth Preparation Prosthodontic Dental Porcelain Incisor Resins Synthetic Dental Prosthesis Design visual_art visual_art.visual_art_medium Computer-Aided Design Zirconium Oral Surgery business Abutment (dentistry) |
| Zdroj: | The Journal of Prosthetic Dentistry. 109:227-233 |
| ISSN: | 0022-3913 |
| DOI: | 10.1016/s0022-3913(13)60049-9 |
| Popis: | Statement of problem As a result of natural tooth anatomy or gingival recession, anterior teeth are more likely to present increased abutment finish line curvature. Purpose The purpose of this study was to investigate the influence of the curvature of the finish line on the marginal gap widths of ceramic copings. Material and methods An ivorine maxillary central incisor was prepared for 3 different abutment finish line curvatures (1, 3, and 5 mm). Thirty-six copings were fabricated for each of these curvatures by using Cercon, IPS e.max, and Lava systems. The marginal gap width was measured by using a stereomicroscope, and the data were subsequently analyzed by means of a 2-way ANOVA and a 1-way ANOVA (α=.05). Results A significantly higher mean marginal gap width was found for the 5-mm curvature group (Cercon, 76.59 ±23.01 µm; IPS e.max, 106.44 ±18.48 µm; Lava, 128.34 ±20.79 µm) than for both the 3-mm curvature group (Cercon, 60.18 ±9.74 µm; IPS e.max, 81.79 ±16.20 µm; Lava, 99.19 ±15.32 µm) and the 1-mm curvature group (Cercon, 38.3 ±6.85 µm; IPS e.max, 52.22 ±10.66 µm; Lava, 69.99 ±6.77 µm). Conclusions The greater the finish line curvature, the wider the marginal gap widths for the 3 ceramic systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect