Experimental comparison between tractional and compressive stress on temporomandibular joint
Experimental comparison between tractional and compressive stress on temporomandibular joint
复制标题
颞下颌关节拉应力与压应力的实验比较
DOI：
10.1111/odi.12650
复制
发表时间：
2017
期刊：
影响因子：
3.8
通讯作者：
Nogami S Yamauchi K Shimizu Y Hirayama B Kumasaka A Iikubo M Kumamoto H Takahashi T
中科院分区：
文献类型：
--
作者：
Saito A;Oki A;Nakamura T;Onodera S;Shino H;Hasegawa D;Kosaki K;Onda T;Watanabe A;Shibahara T;Sueishi K;Azuma T;齋藤暁子，大木章生，中村貴，小野寺晶子，篠宏美，長谷川大悟，小崎健次郎，恩田 健志，渡邊 章，柴原孝彦，末石研二，東俊文;大木章生，坂本輝雄，長谷川大悟，柴原孝彦，東俊文，末石研二;青木栄人，鈴木瑛一，久永幸乃，佐藤正敬，小野寺晶子，篠宏美，齋藤暁子，齋藤淳，東俊文;Nogami S Yamauchi K Shimizu Y Hirayama B Kumasaka A Iikubo M Kumamoto H Takahashi T
目的我们通过实验比较压缩和牵引机械应力对家兔颞下颌关节 (TMJ) 的影响，以评估进行性髁突吸收的病因。材料和方法我们使用定制装置进行皮质截骨术，手术后每 12 小时延长 0.25 毫米，持续 1 周。在此期间，兔子颞下颌关节受到压缩或牵引机械应力。使用显微计算机断层扫描和组织学染色检查各组的样本。结果压缩组骨吸收面积的评分高于牵引组。此外，压缩组骨吸收深度的评分高于牵引组。我们观察到压缩组髁下骨吸收的发生率明显高于牵引组。与对照组和牵引组相比，压缩组中抗酒石酸酸性磷酸酶呈阳性的细胞要多得多。结论这里的结果表明，过度的机械应力，特别是压缩机械应力，可能会显着影响颞下颌关节的形态学骨变化结果。
ObjectiveWe experimentally compared the effects of compressive and tractional mechanical stress on the temporomandibular joint (TMJ) of rabbits to assess the etiology of progressive condylar resorption.Materials and MethodsWe performed a cortical osteotomy using custom‐made devices that were lengthened by 0.25 mm every 12 h for 1 week after surgery. During this time, the rabbit TMJ was under compressive or tractional mechanical stress. The samples in each group were examined using micro‐computed tomography and histological staining.ResultsScores for the area of bone resorption were higher in the compressive group than in the tractional group. Moreover, scores for the depth of bone resorption were higher in the compressive group than those in the tractional group. We observed a significantly higher prevalence of resorption in the subcondylar bone in the compressive group than in the tractional group. There were substantially more cells that were positive for tartrate‐resistant acid phosphatase in the compressive group than in the control and tractional groups.ConclusionsThe outcomes here suggest that excessive mechanical stress, particularly compressive mechanical stress, may significantly affect morphological bone change findings in the TMJ.