Composition and Mechanical Properties of Gutta-Percha Endodontic Points
- 1 September 1975
- journal article
- Published by SAGE Publications in Journal of Dental Research
- Vol. 54 (5) , 921-925
- https://doi.org/10.1177/00220345750540052901
Abstract
Gutta-percha endodontic filling points were found to contain approximately 20% gutta-percha (matrix), 66% zinc oxide (filler), 11% heavy metal sulfates (radiopacifier), and 3% waxes and/or resins (plasticizer). The mechanical properties were indicative of a partially crystalline viscoelastic polymerfc material. They were found to obey Hooke's law and displayed a prominent upper and lower yield point when stressed beyond the proportional limit. The essential differences in mechanical properties of individual brands were found to be a function of the gutta-percha and zinc oxide concentration.Keywords
This publication has 1 reference indexed in Scilit:
- Physical measurements on gutta-perchaOral Surgery, Oral Medicine, Oral Pathology, 1971