Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures.
Purpose: To compare marginal and internal gaps of zirconia single crown substructures with those of four-unit fixed dental prostheses substructures. Materials and Methods: A standard Co-Cr model of maxillary first premolar and maxillary second molar abutments was made. Twenty polyether impressions o...
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th-mahidol.10082023-04-12T15:28:32Z Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures. Kulnaree Charukietkajorn กุลนรี จารุเกียรติขจร Chuchai Anunmana ชูชัย อนันต์มานะ Chuchai Anunmana ชูชัย อนันต์มานะ Mahidol University. Faculty of Dentistry. Department of Prosthodontics CAD-CAM Gap Zirconia Fixed dental prostheses Crown Bridge LAVA Open Access article วิทยาสารทันตแพทยศาสตร์มหิดล Mahidol Dental Journal Purpose: To compare marginal and internal gaps of zirconia single crown substructures with those of four-unit fixed dental prostheses substructures. Materials and Methods: A standard Co-Cr model of maxillary first premolar and maxillary second molar abutments was made. Twenty polyether impressions of the standard model were taken and subsequently poured with type-IV dental stone. Zirconia substructures were fabricated as premolar and molar single crowns (Cr, n=10) and four-unit bridges (Br, n=10) using LAVA™ Zirconia system. The gaps between substructures and their standard abutments were evaluated using silicone replica technique. Twenty-two different points were measured along the marginal and internal surfaces. The differences of the gap widths between single crown and four-unit bridge substructures were analyzed using Mann Whitney U-test (α=0.05). Results: There was significant difference of marginal gap between Cr and Br groups at mesial marginal gap of molar (30±44 and 112±19 µm for Cr and Br, respectively). For the internal gaps, mid-occlusal point revealed the largest gap. No significant difference of internal gaps between Cr and Br groups was observed except at some points of mesial chamfer area of molar (123±18 and 218±33 µm for Cr and Br, respectively) and at buccal axial wall of premolar (45±15 and 76±47 µm for Cr and Br, respectively). Conclusions: The differences between the gaps of zirconia single crown and those of four-unit bridge substructures were found at the mesial side of molar marginal area. Most of internal gaps of single crown substructures did not significantly differ from those of four-unit bridge substructures 2016-02-09T02:30:58Z 2016-12-13T06:51:25Z 2016-02-09T02:30:58Z 2016-12-13T06:51:25Z 2016-02-02 2015-09 Article Charukietkajorn K, Anunmana C. Marginal and internal fits of zirconia single crown and four-unit fixed dental prostheses substructures. M Dent J 2015; 35: 209-19. 0125-5614 (printed) https://repository.li.mahidol.ac.th/handle/123456789/1008 eng Mahidol University Mahidol University application/pdf |
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CAD-CAM Gap Zirconia Fixed dental prostheses Crown Bridge LAVA Open Access article วิทยาสารทันตแพทยศาสตร์มหิดล Mahidol Dental Journal |
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CAD-CAM Gap Zirconia Fixed dental prostheses Crown Bridge LAVA Open Access article วิทยาสารทันตแพทยศาสตร์มหิดล Mahidol Dental Journal Kulnaree Charukietkajorn กุลนรี จารุเกียรติขจร Chuchai Anunmana ชูชัย อนันต์มานะ Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures. |
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Purpose: To compare marginal and internal gaps of zirconia single crown substructures with those of four-unit fixed dental prostheses substructures. Materials and Methods: A standard Co-Cr model of maxillary first premolar and maxillary second molar abutments was made. Twenty polyether impressions of the standard model were taken and subsequently poured with type-IV dental stone. Zirconia substructures were fabricated as premolar and molar single crowns (Cr, n=10) and four-unit bridges (Br, n=10) using LAVA™ Zirconia system. The gaps between substructures and their standard abutments were evaluated using silicone replica technique. Twenty-two different points were measured along the marginal and internal surfaces. The differences of the gap widths between single crown and four-unit bridge substructures were analyzed using Mann Whitney U-test (α=0.05). Results: There was significant difference of marginal gap between Cr and Br groups at mesial marginal gap of molar (30±44 and 112±19 µm for Cr and Br, respectively). For the internal gaps, mid-occlusal point revealed the largest gap. No significant difference of internal gaps between Cr and Br groups was observed except at some points of mesial chamfer area of molar (123±18 and 218±33 µm for Cr and Br, respectively) and at buccal axial wall of premolar (45±15 and 76±47 µm for Cr and Br, respectively). Conclusions: The differences between the gaps of zirconia single crown and those of four-unit bridge substructures were found at the mesial side of molar marginal area. Most of internal gaps of single crown substructures did not significantly differ from those of four-unit bridge substructures |
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Chuchai Anunmana |
author_facet |
Chuchai Anunmana Kulnaree Charukietkajorn กุลนรี จารุเกียรติขจร Chuchai Anunmana ชูชัย อนันต์มานะ |
format |
Article |
author |
Kulnaree Charukietkajorn กุลนรี จารุเกียรติขจร Chuchai Anunmana ชูชัย อนันต์มานะ |
author_sort |
Kulnaree Charukietkajorn |
title |
Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures. |
title_short |
Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures. |
title_full |
Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures. |
title_fullStr |
Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures. |
title_full_unstemmed |
Marginal and internal fits of zirconia single crown and Four-unit Fixed Dental Prostheses Substructures. |
title_sort |
marginal and internal fits of zirconia single crown and four-unit fixed dental prostheses substructures. |
publishDate |
2016 |
url |
https://repository.li.mahidol.ac.th/handle/123456789/1008 |
_version_ |
1781415489801551872 |