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Quintessence Publishing: Journals: IJP
The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

Publication:
July/August 1992
Volume 5 , Issue 4

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The Effect of Clasp Form on Permanent Deformation

Snyder/Duncanson, Jr.

Pages: 345-350
PMID: 1520456

This study was conducted to discover whether a relationship exists between clasp width-thickness ratios and wear or deformation. Five different forms of circumferential clasps were studied. The clasps were fabricated with a 160 degree curvature around an 8-mm (diameter) cylinder and cast in Ticonium alloy. The clasps were subjected to 1500 cycles of 0.01 inch flexure. The degree of permanent deformation was not related to clasp form or width-thickness ratio. Of the five forms, only one exhibited no permanent deformation. According to Duncan’s Multiple Range Test, significant differences in wear against a steel tooth model were observed among the five clasp forms evaluated (alpha = 0.05).

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