华西口腔医学杂志Issue(1)：63-67,5.DOI:10.7518/hxkq.2016.01.013
不同设计和饰/釉瓷烧结对氧化锆种植全瓷冠内部和边缘适合性的影响
Influence of different designs and porcelain/glaze firing on the marginal and internal fit of implant-supported zirconia crowns crowns
摘要
Abstract
Objective This study investigated the influence of different designs and porcelain/glaze firing on the marginal and internal fit of three kinds of computer aided design/computer aided manufacturing (CAD/CAM) zirconia ceramic implantsupported crowns. Methods Three groups of zirconia ceramic implant-supported crowns with different designs were produced from copings by using a Cercon CAD/CAM system (n=8). The first two groups comprised double-layer crowns (zirconia coping+veneer) with regular (Group A) and full circumferential zirconia-collar marginal designs (Group B). The third group was composed of anatomic single-layer zirconia crowns without cores (Group C). Initially, the marginal and internal gaps of the copings and crowns were individually replicated by light-body silicon and then measured by micro-computed tomography scanning before and after porcelain/glaze firing. Five measurements were employed: vertical marginal gap (MG); horizontal marginal discrepancy (HMD); chamfer area (CA); axial wall (AW); and axial-occlusal transition area (AOT). Statistical analyses were performed by SPSS 17.0. Results HMD measurements in Group A were statistically higher than those in Groups B and C (P<0.05), regardless of whether the values were obtained before or after porcelain/glaze firing. By contrast, the HMD measurements in Groups B and C showed no significant difference (P>0.05). Moreover, no differences were noted in MG, CA, AW, and AOT among the three groups (P>0.05). All the measurements in the three groups showed no significant change after porcelain/glaze firing (P>0.05), except for MG in Group A, which significantly decreased (P< 0.05). Conclusion The marginal fits of the double-layer crowns with full circumferential zirconia-collar and the anatomic single-layer zirconia crowns were superior to that of the double-layer crowns with regular margins. The MG of the crowns with regular margins was obviously influenced by porcelain firing.关键词
氧化锆/种植全冠/适合性/饰/釉瓷烧结Key words
zirconia/implant-supported crown/fit/porcelain/glaze firing分类
医药卫生引用本文复制引用
刘翠玲,高旭,齐玉萍,杨丽媛..不同设计和饰/釉瓷烧结对氧化锆种植全瓷冠内部和边缘适合性的影响[J].华西口腔医学杂志,2016,(1):63-67,5.基金项目
山东省卫生厅医药卫生科技发展计划项目基金 （）
