Marginal Discrepancy of Monolithic and Veneered All-Ceramic Crowns on Titanium and Zirconia Implant Abutments Before and After Adhesive Cementation: A Scanning Electron Microscopy Analysis
Marginal Discrepancy of Monolithic and Veneered All-Ceramic Crowns on Titanium and Zirconia Implant Abutments Before and After Adhesive Cementation: A Scanning Electron Microscopy Analysis
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DOI：
10.11607/jomi.2759
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发表时间：
2013-03-01
影响因子：
2
通讯作者：
Pradies, Guillermo
中科院分区：
文献类型：
--
作者：
Martinez-Rus, Francisco;Ferreiroa, Alberto;Pradies, Guillermo
目的：评价钛、氧化锆种植体基台上的全瓷全冠系统与单瓷全冠系统的边缘差异。材料和方法：60个定制的种植体基台的上颌右中切牙制作的钛和氧化锆（n = 30）的内部连接种植体系统。使用以下系统（每组n = 10）制造全瓷冠：计算机辅助设计/计算机辅助制造（CAD/CAM）单片二硅酸锂（MLD）、压制二硅酸锂（PLD）或CAD钇稳定的四氧化锆多晶（Y-TZP）。PLD和Y-TZP系统的框架用氟磷灰石基陶瓷手工贴面。将冠与种植体基台粘接，测量粘接前后差距的绝对边缘差。数据进行统计学分析。结果如下：边缘差异显着影响冠系统和粘结，但材料没有显着影响的结果。相互作用项不显著。钛基台和氧化锆基台上的Y-TZP冠在粘固前（分别为52.1 +/- 17 μ m和56.2 +/- 11 μ m）和粘固后（分别为98.7 +/- 17 μ m和101.8 +/- 16 μ m）的平均边缘差异最小。在粘固前，MLD冠在钛基台和氧化锆基台上的平均边缘开口明显大于PLD冠（MLD分别为75.2 +/- 12和77.5 +/- 13 μ m，PLD分别为52.1 +/- 17 μ m和69.7 +/- 8 μ m）。粘固后，MLD冠的钛基台和氧化锆基台（分别为113.5 +/- 12 μ m和118.3 +/- 14 μ m）比PLD冠的值（分别为98.7 +/- 17 μ m和109.4 +/- 9 μ m）明显更大。结论：与MLD和PLD相比，手工贴面Y-TZP冠在骨水泥固定前后在钛和氧化锆种植体基台上表现出更有利的边缘适合性。
Purpose: To evaluate the marginal discrepancy of monolithic and veneered all-ceramic crown systems cemented on titanium (Ti) and zirconia implant abutments. Material and Methods: Sixty customized implant abutments for a maxillary right central incisor were fabricated of Ti and zirconia (n = 30 of each) for an internal-connection implant system. All-ceramic crowns were fabricated using the following systems (n = 10 per group): monolithic with computer-aided design/computer-assisted manufacture (CAD/CAM) lithium disilicate (MLD), pressed lithium disilicate (PLD), or CAD yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP). The frameworks of the PLD and Y-TZP systems were manually veneered with a fluorapatite-based ceramic. The crowns were cemented to their implant abutments, and the absolute marginal discrepancy of the gap was measured before and after cementation. Data were analyzed statistically. Results: Marginal discrepancies were significantly influenced by the crown system and by cementation, but the material did not significantly affect the results. Interaction terms were not significant. Y-TZP crowns on both Ti and zirconia abutments presented the smallest mean marginal discrepancies before (52.1 +/- 17 mu m and 56.2 +/- 11 mu m, respectively) and after cementation (98.7 +/- 17 mu m and 101.8 +/- 16 mu m, respectively). Before cementation, MLD crowns showed significantly larger mean marginal openings than PLD crowns on both Ti and zirconia abutments (75.2 +/- 12 and 77.5 +/- 13 mu m for MLD, 52.1 +/- 17 mu m and 69.7 +/- 8 mu m for PLD, respectively). After cementation, both Ti and zirconia abutments with MLD crowns (113.5 +/- 12 mu m and 118.3 +/- 14 mu m, respectively) showed significantly larger values than with PLD crowns (98.7 +/- 17 mu m and 109.4 +/- 9 mu m, respectively). Conclusions: Manually veneered Y-TZP crowns demonstrated more favorable marginal fit on both Ti and zirconia implant abutments before and after cementation compared to those of MLD and PLD.