3种钴铬钼合金美观卡环用于前磨牙的固位力分析

上海口腔医学 ›› 2016, Vol. 25 ›› Issue (3): 284-287.

3种钴铬钼合金美观卡环用于前磨牙的固位力分析

邬雪颖, 钟群

上海市口腔病防治院·上海市口腔医院,上海 200031

收稿日期:2016-04-18 修回日期:2016-05-03 出版日期:2016-06-25 发布日期:2016-07-22
通讯作者: 钟群,E-mail: zhongqun681115@qq.com E-mail:15800714355@163.com
作者简介:邬雪颖（1980-）,女,硕士研究生,主治医师

Analysis of retention of 3 different aesthetic Co-Cr-Mo alloy clasps on premolars

WU Xue-Ying, ZHONG Qun

Shanghai Stomatological Hospital. Shanghai 200031, China

Received:2016-04-18 Revised:2016-05-03 Online:2016-06-25 Published:2016-07-22

摘要/Abstract

摘要： 目的研究3种不同设计的钴铬钼合金卡环在前磨牙的固位力变化,为临床选择适合美观要求的卡环提供依据。方法采用EZ20万能测力仪,测定钴铬钼合金的传统三臂卡、改良RPI卡环和变异Y形卡环在上颌第二前磨牙的0.25、0.50、0.75 mm 3个倒凹深度上的固位力。采用SPSS22.0软件包对数据进行统计学分析。结果在0.25和0.50 mm倒凹深度时,卡环固位力大小排序为传统三臂卡>变异Y形卡环>改良RPI卡。在0.75 mm倒凹深度,循环开始时卡环固位力大小排序与前2组相似,但在衰减后改变为变异Y形卡环>传统三臂卡>改良RPI卡。结论对位于美学区域的前磨牙区,进入0.75 mm倒凹深度的变异Y形卡环即可提供足够的固位力,又位于美观固位区并靠近龈缘,临床设计义齿时可优先考虑。

关键词: 钴铬钼合金, 美观卡环, 卡环固位力

Abstract: PURPOSE: To analyze the retention of 3 different Co-Cr-Mo alloy clasps on premolars, and provide information for clinical design of aesthetic clasps. METHODS: An EZ20 force measuring instrument was used to record the retention of Co-Cr-Mo alloy casting aesthetic clasps when they were dislodged from undercuts of different depths (0.25, 0.50, 0.75 mm) on premolars. The data were analyzed with SPSS 22.0 software passage. RESULTS: The clasp retention in groups of 0.25 and 0.5 mm undercut was three-arm clasp > varied Y-shaped clasp > modified RPI clasp. In the group of 0.75 mm undercut, the clasp retention was varied Y-shaped clasp > three-arm clasp > modified RPI clasp after circulations. CONCLUSIONS: A varied Y-shaped bar clasp of 0.75 mm undercut depth is suitable for premolar both for its adequate retention and aesthetic effect.

Key words: Co-Cr-Mo alloy, Aesthetic clasp, Clasp retention

中图分类号:

R783.2

邬雪颖, 钟群. 3种钴铬钼合金美观卡环用于前磨牙的固位力分析[J]. 上海口腔医学, 2016, 25(3): 284-287.

WU Xue-Ying, ZHONG Qun. Analysis of retention of 3 different aesthetic Co-Cr-Mo alloy clasps on premolars[J]. Shanghai Journal of Stomatology, 2016, 25(3): 284-287.

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