Comparison of mechanical properties between vital dentine and pulpless dentine
- VernacularTitle:活髓牙本质与无髓牙本质的力学性能比较
- Author:
Zhuang ZHENG
;
Liang TANG
;
Mingqing LI
- Publication Type:Journal Article
- Keywords:
Dentin;
Mechanical property;
Elastic modulus;
Proportional limit;
Compressive strength
- From:
Journal of Practical Stomatology
2000;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objectives:To study the mechanical properties of human dentin obtained from vital and pulpless teeth. Methods:Dentin specimens were obtained from 20 freshly extracted normal vital human teeth and 9 endodontically treated human pulpless teeth. The dentin was grinded to be rectangular specimens along to the longitudinal axes of the teeth. All the specimens were immerged in 9 g/L sodium chloride solution, their compressive mechanical properties were measured with displacement measurement method. All data obtained were analyzed with t tests. Results:The elastic moduli,proportional limits and compressive strengths of the dentin samples from vital teeth were (15.77? 1.52 ) GPa, (157.07?13.79) MPa and (257.67?10.23) MPa respectively. Those from pulpless teeth were (12.08?1.71) GPa, (144.30?9.76) MPa and (235.26?9.12) MPa respectively(P
