Marginal and internal fit of nano-composite CAD/CAM restorations
Objectives The purpose of this study was to compare the marginal and internal fit of nano-composite CAD-CAM restorations. Materials and Methods A full veneer crown and an mesio-occluso-distal (MOD) inlay cavity, which were prepared on extracted human molars, were used as templates of epoxy resi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Korean Academy of Conservative Dentistry
2016-02-01
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| Series: | Restorative Dentistry & Endodontics |
| Online Access: | https://doi.org/10.5395/rde.2016.41.1.37 |
| _version_ | 1828743121499848704 |
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| author | So-Hyun Park Yeon-Jee Yoo Yoo-Jin Shin Byeong-Hoon Cho Seung-Ho Baek |
| author_facet | So-Hyun Park Yeon-Jee Yoo Yoo-Jin Shin Byeong-Hoon Cho Seung-Ho Baek |
| author_sort | So-Hyun Park |
| collection | DOAJ |
| description | Objectives
The purpose of this study was to compare the marginal and internal fit of nano-composite CAD-CAM restorations.
Materials and Methods
A full veneer crown and an mesio-occluso-distal (MOD) inlay cavity, which were prepared on extracted human molars, were used as templates of epoxy resin replicas. The prepared teeth were scanned and CAD-CAM restorations were milled using Lava Ultimate (LU) and experimental nano-composite CAD/CAM blocks (EB) under the same milling parameters. To assess the marginal and internal fit, the restorations were cemented to replicas and were embedded in an acrylic mold for sectioning at 0.5 mm intervals. The measured gap data were pooled according to the block types and measuring points for statistical analysis.
Results
Both the block type and measuring point significantly affected gap values, and their interaction was significant (p = 0.000). In crowns and inlays made from the two blocks, gap values were significantly larger in the occlusal area than in the axial area, while gap values in the marginal area were smallest (p < 0.001). Among the blocks, the restorations milled from EB had a significantly larger gap at all measuring points than those milled from LU (p = 0.000).
Conclusions
The marginal and internal gaps of the two nano-composite CAD/CAM blocks differed according to the measuring points. Among the internal area of the two nano-composite CAD/CAM restorations, occlusal gap data were significantly larger than axial gap data. The EB crowns and inlays had significantly larger gaps than LU restorations. |
| first_indexed | 2024-04-13T01:31:07Z |
| format | Article |
| id | doaj.art-94bb01df57394ac383cd4e508180a326 |
| institution | Directory Open Access Journal |
| issn | 2234-7658 2234-7666 |
| language | English |
| last_indexed | 2024-04-13T01:31:07Z |
| publishDate | 2016-02-01 |
| publisher | Korean Academy of Conservative Dentistry |
| record_format | Article |
| series | Restorative Dentistry & Endodontics |
| spelling | doaj.art-94bb01df57394ac383cd4e508180a3262022-12-22T03:08:30ZengKorean Academy of Conservative DentistryRestorative Dentistry & Endodontics2234-76582234-76662016-02-01411374310.5395/rde.2016.41.1.37Marginal and internal fit of nano-composite CAD/CAM restorationsSo-Hyun Park0Yeon-Jee Yoo1Yoo-Jin Shin2Byeong-Hoon Cho3 Seung-Ho Baek4Seoul National University Dental HospitalSeoul National University School of Dentistry and Dental Research InstituteSeoul National University School of Dentistry and Dental Research InstituteSeoul National University School of Dentistry and Dental Research InstituteSeoul National University School of Dentistry and Dental Research InstituteObjectives The purpose of this study was to compare the marginal and internal fit of nano-composite CAD-CAM restorations. Materials and Methods A full veneer crown and an mesio-occluso-distal (MOD) inlay cavity, which were prepared on extracted human molars, were used as templates of epoxy resin replicas. The prepared teeth were scanned and CAD-CAM restorations were milled using Lava Ultimate (LU) and experimental nano-composite CAD/CAM blocks (EB) under the same milling parameters. To assess the marginal and internal fit, the restorations were cemented to replicas and were embedded in an acrylic mold for sectioning at 0.5 mm intervals. The measured gap data were pooled according to the block types and measuring points for statistical analysis. Results Both the block type and measuring point significantly affected gap values, and their interaction was significant (p = 0.000). In crowns and inlays made from the two blocks, gap values were significantly larger in the occlusal area than in the axial area, while gap values in the marginal area were smallest (p < 0.001). Among the blocks, the restorations milled from EB had a significantly larger gap at all measuring points than those milled from LU (p = 0.000). Conclusions The marginal and internal gaps of the two nano-composite CAD/CAM blocks differed according to the measuring points. Among the internal area of the two nano-composite CAD/CAM restorations, occlusal gap data were significantly larger than axial gap data. The EB crowns and inlays had significantly larger gaps than LU restorations.https://doi.org/10.5395/rde.2016.41.1.37 |
| spellingShingle | So-Hyun Park Yeon-Jee Yoo Yoo-Jin Shin Byeong-Hoon Cho Seung-Ho Baek Marginal and internal fit of nano-composite CAD/CAM restorations Restorative Dentistry & Endodontics |
| title | Marginal and internal fit of nano-composite CAD/CAM restorations |
| title_full | Marginal and internal fit of nano-composite CAD/CAM restorations |
| title_fullStr | Marginal and internal fit of nano-composite CAD/CAM restorations |
| title_full_unstemmed | Marginal and internal fit of nano-composite CAD/CAM restorations |
| title_short | Marginal and internal fit of nano-composite CAD/CAM restorations |
| title_sort | marginal and internal fit of nano composite cad cam restorations |
| url | https://doi.org/10.5395/rde.2016.41.1.37 |
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