Circulating test and analysis of clasp retention

To show the trend of the retention change during the circulation of the clasp dislodging and inserting, and to discuss the proper depth of the undercut for a specific clasp. It is also a basic study for the best designing of RPD. The Chatillon force measuring instrument was used to record the variat...

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Bibliographic Details
Published inZhonghua kouqiang yixue zazhi Vol. 38; no. 6; p. 420
Main Authors Ge, Qi-min, Zhang, Fu-qiang
Format Journal Article
LanguageChinese
Published China 01.11.2003
Subjects
Dental Clasps
Dental Prosthesis Retention
Humans
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Summary:To show the trend of the retention change during the circulation of the clasp dislodging and inserting, and to discuss the proper depth of the undercut for a specific clasp. It is also a basic study for the best designing of RPD. The Chatillon force measuring instrument was used to record the variation of the retention of Co-Cr alloy casting Akers clasp when they were dislodging from undercuts of different depths (0.25 mm, 0.50 mm, 0.75 mm) on bicuspid and molar. The data was analysed of Correlation and Regression by SPSS 10.0 statistic software. The variations of the retention in the circulation are obvious from the different teeth and different undercut depths. It shows an attenuation trend in circulation (P < 0.01). After 400 times dislodging, in bicuspid group, the retention of the clasp used in 0.50 mm undercut became less than the one used in 0.25 mm undercut. While the retention of the clasp used in 0.75 mm decreases most obviously, it values 0.7670 kg. In molar group, the attenuations of the retention
ISSN:1002-0098