A Structural Mechanics Study with Human Maxillary Premolar
10.3969/j.issn.1672-173X.2010.02.028
- VernacularTitle:人体上颌第二双尖牙的结构力学研究
- Author:
Jun-Xian QIU
1
;
Xi ZHAO
;
Xin-Min CHEN
;
Xiao-Nan ZHANG
;
Qing-Lin MEN
;
Chao XU
Author Information
1. 四川大学华西口腔医院
- Keywords:
Maxillary second bicuspid tooth;
Structural mechanics;
Stress analysis;
Offset;
Three-dimensional finite element
- From:
Journal of Sichuan University (Medical Sciences)
2010;41(2):303-306
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the stress distribution and offset of dental and periodontal tissues imposed by changes in inner diameter of pulp cavity.Methods Six models of maxillary second bicuspid tooth with different inner diameter of pulp cavity were established, including: ① calcificated pulp without pulp chamber; ② mostly calcificated pulp chamber with inward reduction of 0.5 mm in normal pulp cavity; ③ initially calcificated pulp chamber with inward reduction of 0.25 mm in normal pulp cavity;④ normal pulp cavity; ⑤ initially absorbed pulp chamber with outward expansion of 0.25 mm in normal pulp cavity; ⑥ mostly absorbed pulp chamber with outward expansion of 0.5mm in normal pulp cavity.Vertical and oblique forces with 160 N were loaded on the central fossa, respectively, in order to calculate the stress distribution of dental and periodontal tissues and the maximum incipient offset of the teeth.Results With loaded vertical and oblique forces on central fossa, increased stress distribution of periodontal tissues and maximum incipient offset of teeth were found in all of the models, which increased with the increase of pulp cavity.Conclusion The change in inner diameter of pulp cavity has an impact on the stress distribution of periodontal tissues and maximum incipient offset of the second upper bicuspid teeth.
