This paper is only available as a PDF. To read, Please Download here.
Abstract
A variety of gutta-percha materials was subjected to dilatometric analysis to measure
volume changes which take place with heating and cooling. The volume changes were
found to be related directly to the molecular transformation kinetics of the polymer
material and to the temperature ranges within which they take place. If the gutta-percha
in the apical segment is not elevated above 45° C, molecular transformation is avoided
and the ultimate volume changes which accompany temperature cycling are small, predictable,
and controllable.
To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to Oral Surgery, Oral Medicine, Oral Pathology and Oral RadiologyAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- The thermo-mechanical properties of gutta-percha. Part II. The history and molecular chemistry of gutta-percha.Oral Surg Oral Med Oral Pathol. 1974; 37: 954-961
- The thermo-mechanical properties of gutta-percha. Part III. The determination of phase transitions temperature for gutta-percha.Oral Surg Oral Med Oral Pathol. 1974; 38: 109-114
- The thermal-mechanical properties of gutta-percha. Part IV. A thermal profile of the warm gutta-percha packing procedure.Oral Surg Oral Med Oral Pathol. 1981; 51: 544-551
- Report of laboratory investigations on the physical properties of root filling materials and the efficiency of root fillings for blocking infection from sterile tooth structures.J Natl Dent Assoc. 1918; 5: 1259-1280
- Utilization of dimensional changes in gutta-percha cones to simplify filling of the root canal.Dent Digest. 1963; 69: 14-20
- Physical measurements on gutta-percha.Oral Surg Oral Med Oral Pathol. 1971; 32: 260-270
- Test for cubical expansion of plastics in 1969 book of ASTM standards, part 27, ASTM designation D 864-52.in: American Society for Testing and Materials, Philadelphia1969: 358-361
- Volume dilatometry.J Res Natl Bureau of Standards, Research Paper RP 2016, A43. 1949; : 145-156
- Standard methods for test for specific gravity and density of plastics by displacement, 1969 book of ASTM standards, part 27, ASTM designation D 792066.in: American Society for Testing Materials, Philadelphia1969: 311-318
Article info
Footnotes
☆From a thesis submitted by Dr. Goodman in partial fulfillment of the requirements for the degree of Master of Science.
Identification
Copyright
© 1985 Published by Elsevier Inc.
