Micro-CT evaluation of the marginal fit of different In-Ceram alumina copings.
Micro-CT evaluation of the marginal fit of different In-Ceram alumina copings.
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不同 In-Ceram 氧化铝内冠边缘贴合度的显微 CT 评估。
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
G. Eliades
中科院分区：
文献类型：
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作者：
Stavros Pelekanos;Maria Koumanou;S. Koutayas;S. Zinelis;G. Eliades
该研究的目的是评估通过四种不同技术制造的不同 In-Ceram 氧化铝陶瓷芯的边际配合度。四组四个 In-Ceram 氧化铝芯材样本 (Vita)，每组厚度 0.6 mm，使用四种不同的技术从母模制造而成：SL 组，注浆成型技术（In-Ceram 系统）； CL组，仿形铣削技术（Celay系统）； CR 组是 CAD/CAM 系统（Cerec inLab 系统），WO 组是电沉积浸渍技术（Wol-Ceram）。将岩心样本安装到主模具上后，使用显微断层扫描设备（1072 micro-CT，Sky-Scan）对其进行扫描。数据集由软件（TView v1.1、SkyScan）处理，并生成每个岩心的 10 个垂直截面。在这些显微断层扫描横截面上，以微米尺度（微米）测量边缘间隙（MG）和绝对边缘差异（MD）。滑铸和电沉积浸渍技术分别呈现出 22 微米和 35 微米 MG 的最佳结果（α<5%）。 CAD/CAM 系统的 MG 为 55 微米。此外，注浆成型和电沉积浸渍技术分别在 50 微米和 60 微米的 MD 下呈现出最佳结果（α<5%）。滑铸技术和 Wol-Ceram 系统呈现出最佳的边缘拟合效果，其次是 Cerec inLab，它呈现出临床上可接受的结果。显微断层扫描分析似乎是评估牙齿修复体边缘配合的可靠方法。
The aim of the study was to evaluate the marginal fit of different In-Ceram alumina ceramic cores manufactured by four different techniques. Four groups of four In-Ceram alumina core specimens (Vita), each 0.6 mm in thickness, were fabricated from a master die using four different techniques: Group SL, the slip-cast technique (In-Ceram system); Group CL, the copy-milling technique (Celay system); Group CR, a CAD/CAM system (Cerec inLab system) and Group WO, the electro-deposition dipping technique (Wol-Ceram). After the core specimens were fitted on the master die, they were scanned with the use of a microtomography device (1072 micro-CT, Sky- Scan). Datasets were processed by software (TView v1.1, SkyScan) and 10 vertical sections from each core were generated. On these microtomographic cross-sections the marginal gap (MG) and the absolute marginal discrepancy (MD) were measured in microscale (microm). The slip-cast and the electro-deposition dipping techniques presented the best results of MG with 22 microm and 35 microm, respectively (alpha<5%). The CAD/CAM system presented an MG of 55 microm. In addition, the slip-cast and the electro-deposition dipping techniques presented the best results of MD with 50 microm and 60 microm, respectively (alpha<5%). The slip-cast technique and the Wol-Ceram system presented the best marginal fit, followed by Cerec inLab, which presented clinically acceptable results. Microtomography analysis seemed to be a reliable method of evaluating the marginal fit of dental restorations.