Surface Analysis of Keepers on Dental Magnetic Attachments : Comparison of Cast-Bonding Technique and Direct-Bonding Technique
Surface Analysis of Keepers on Dental Magnetic Attachments : Comparison of Cast-Bonding Technique and Direct-Bonding Technique
复制标题
牙科磁性附着体保持器的表面分析：铸造粘合技术与直接粘合技术的比较
DOI：
10.2186/prp.3.62
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Koichi Sugiyama
中科院分区：
文献类型：
--
作者：
Y. Suminaga;F. Tsuchida;N. Takishin;T. Hosoi;Koichi Sugiyama
目的：为了使磁性附着体获得最大的吸引力，保持器表面的平整度非常重要。本研究评估了使用铸造粘结和直接粘结techniques.Materials和方法：标本制作与保持架从超超薄3513磁性附着体系统（日立金属，东京，日本）使用铸造粘结和直接粘结技术上制作的顶盖上的保持架表面的平整度。在铸造粘结技术中，根据传统的实验室程序，对带有保持器的顶盖进行上蜡和铸造。在直接粘接技术中，使用树脂粘固剂将保持器粘固在铸造壳体上。采用NH-4 N型非接触式激光束测量装置测量保持器的三维形状，并在α= 0.05的显著性水平下对保持器的平整度进行Mann-Whitney U检验。结果：采用铸造粘接技术制备的保持器表面呈凸曲率，而直接粘接技术制备的保持器表面较平整。结论：直接粘接固位体的平面度明显优于铸粘固位体，铸粘固位体的表面在中心部位隆起。因此，直接粘结技术允许磁性附着体的最佳固位力。
Purpose : To obtain maximum attractive force for magnetic attachments, the degree of flatness of the keeper surface is very important. This study evaluated the flatness of keeper surfaces fabricated on copings using the cast-bonding and the direct-bonding techniques.Materials and Methods : Specimens were made with keepers from the Hyper Slim 3513 magnetic attachment system (Hitachi Metals, Tokyo, Japan) using both the cast-bonding and the direct-bonding techniques. In the cast-bonding technique, the coping with the keeper was waxed up and cast according to conventional laboratory procedures. In the direct-bonding technique, the keeper was cemented on the cast housing with resin cement. The 3-dimensional shape of the keepers was measured using non-contact laser beam equipment (NH-4N, Mitaka Kohki, Tokyo, Japan), and the flatness was statistically analyzed with the Mann-Whitney U-test at a significance level of α=0.05.Results : The keepers fabricated with the cast-bonding technique had a convex curvature, whereas the direct-bonding technique produced a flatter keeper surface. There was a significant difference (p<0.01) in the flatness between the two techniques.Conclusion : The direct-bonding keepers were significantly flatter than the cast-bonding keepers, whose surfaces bulged in the center. The direct-bonding technique thus allowed optimal retentive force for the magnetic attachment.