Relationship Between Tissular Structure and Strength of Fresh Bull Periodontal Ligament
10.3969/j.issn.1672-173X.2010.02.027
- VernacularTitle:新鲜离体牛牙周韧带强度与组织结构的关系
- Author:
Qing-Lin MEN
1
;
Xin-Min CHEN
;
Chao XU
;
Shi-Peng REN
;
Yan PENG
Author Information
1. 四川大学
- Keywords:
Periodontal ligament Biomechanics Strength Content of fiber Stress-strain curve
- From:
Journal of Sichuan University (Medical Sciences)
2010;41(2):299-302
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the relationship between the width and the content of fiber in peridontal ligament (PDL) and the strength of peridontal membrane. Methods Fresh mandible of bull was obtained to prepare for a 5 mm×2 mm×10 mm cuboid including teeth, peridontal membrane, and alveolar bone. The width of the PDL was measured under a stereomicroscope. Pull stress was loaded on the test piece until it broke. The stress-strain curve was recorded. The broken ends of the PDL was dyed with siriue to analyze the content of fiber. Results The relationship between the width of the PDL and the maximum stress was expressed as Y＝9.786e~(-3.6693x). The relationship between the width of the PDL and the physiological ultimate stress was expressed as Y=e~(2.188(-3.953)x). The relationship between the percentage of fiber and maximum stress was expressed as Y=20.788-0.755x+0.007x~2. The relationship between the percentage of fiber and the physiological ultimate stress was expressed as Y=1.39e~(-14)·x~(7.666). The initial physiological stress was 0.28 N/mm~2. Conclusion The strength of PDL increases with the decrease of PDL width and increase of fiber content.
