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Young's modulus of warm and cold gutta-percha
J J Camps1, W J Pertot, J Y Escavy
1Department of Restorative Dentistry and Endodontics, University of Marseille, France.
Endodontics & Dental Traumatology
|April 1, 1996
Summary
Warm gutta-percha exhibits significantly lower mechanical strength and higher deformation compared to cold gutta-percha. Gutta-percha Hygenic demonstrated superior properties in this comparative analysis of gutta-percha mechanical characteristics.
Area of Science:
- Biomaterials Science
- Dental Materials Research
- Polymer Mechanics
Background:
- Gutta-percha is a key material in endodontic procedures.
- Understanding its thermomechanical properties is crucial for clinical success.
- Variations in gutta-percha properties can impact treatment outcomes.
Purpose of the Study:
- To compare the Young's modulus of cold and warm gutta-percha.
- To evaluate the yield strength and deformation percentage of gutta-percha at different temperatures.
- To identify gutta-percha formulations with optimal mechanical characteristics.
Main Methods:
- Tensile testing of gutta-percha rods from three manufacturers.
- Testing conducted at two temperatures: 20°C (cold) and 55°C (warm).
- Automatic recording of Young's modulus, yield strength, and percentage of permanent deformation.
Main Results:
- Statistically significant differences were observed in all tested mechanical properties between cold and warm gutta-percha.
- Warm gutta-percha showed a Young's modulus 100 times smaller than cold gutta-percha.
- Warm gutta-percha exhibited a yield strength 2 times smaller and a permanent deformation 10 times higher than cold gutta-percha.
Conclusions:
- Temperature significantly affects the mechanical behavior of gutta-percha.
- Warm gutta-percha demonstrates considerably reduced stiffness and strength.
- Gutta-percha Hygenic displayed the most favorable mechanical properties among the tested materials.