不同高度颊侧多曲簧开闭口运动中应力的变化  

The influence of Buccal multiloop height on stress changes in the mouth during the opening and closing movement

作　　者：王丽祺 王培军[1] 徐实谦[2] 周珊[1] 侯录[1] 张博[1] 

机构地区：[1]哈尔滨医科大学附属第二医院口腔正畸科,150086 [2]哈尔滨工业大学材料与工程学院

出　　处：《现代口腔医学杂志》2016年第6期338-341,共4页Journal of Modern Stomatology

摘　　要：目的测试不同高度的颊侧多曲簧在开闭口运动过程中产生的矫治力。方法选取直径为0.8mm的医用不锈钢丝由同一人进行弯制,所弯制的颊侧多曲簧高度分别为16mm,17mm,18mm,19mm,每种样本各10个。将颊侧多曲簧样件固定在三维测力仪上,模拟口内开闭口运动中应力的变化。结果多曲簧高度为16mm时,最大压应力值为(492.5±54.81)g,最大拉应力值为(346.5±57.34)g;多曲簧高度为17mm时,最大压应力值为(436.9±39.23)g,最大拉应力值为(356.4±58.98)g;多曲簧高度为18mm时,最大压应力值为(379.7±31.94)g,最大拉应力值为(270.2±50.34)g;多曲簧高度为19mm时,最大压应力值为(432.0±29.69)g,最大拉应力值为(326.1±32.92)g。结论高度为18mm的颊侧多曲簧产生的压应力符合颌骨矫形力的最适力值范围,同时产生的拉应力最小,最适用于矫治AngleⅢ类错牙合畸形。Objective To test the stress caused by differences in the height of the Buccal multiloop during the mouth opening and closing movement. Methods A 0.8mm-diameter medical stainless steel wire was used. The Buccal multiloop heights were 16, 17, 18 and 19 mm, respectively. Ten samples were prepared at each height.Finally, the Buccal multiloop samples were fixed to the Buccal Multiloop Resistance Tester to evaluate and analyze the chang in compressive and tensile stress during the mouth opening and closing movement. Results When the Buccal multiloop height was 16 mm,the maximum compressive stress value was 492.5 ±54.81 g and the maximum tensile stress was 346.5 ±57.34 g. For a Buccal multiloop height of 17 mm, the maximum compressive stress value was 436.9 ±39.23 g,while the maximum tensile stress was 356.4 ±58.98 g. At a Buccal multiloop height of 18 mm, the maximum compressive stress was 379.7±31.94 g, while the maximum tensile stress value was 270.2±50.34 g. When the height of the Buccal multiloop was 19 mm, the maximum compressive stress value was 432.0 ±29.69 g,and the maximum tensile stress value was 326.1±32.92 g. Conclusion A Buccal multiloop height of 18 mm not only produces the compressive stress within the limits of orthopedic jaw parameters but also generates the minimum tensile stress.Therefore,it is the best choice for the clinical ClassⅢ malocclusion treatment.

关 键 词：颊侧多曲簧活动矫治器 矫治力 安氏Ⅲ类错 颌间Ⅲ类矫形力 

分 类 号：R783[医药卫生—口腔医学]