颊侧多曲簧对牙列两侧产生矫治力的对比研究(1)
摘 要：目的 通过三维测力仪在口外仿真模拟颊侧多曲簧开闭口过程，对其左右两侧产生矫治力进行测量，加以对比研究。方法 用直径为0.8 mm的医用不锈钢丝，由同一人进行弯制，分别弯制左右两侧颊侧多曲簧各5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。测量颊侧多曲簧矫治器在开闭口运动中对牙列两侧产生矫治力，对比分析其差异。结果 开闭口运动过程中，左右两侧产生矫治力大小不同，左侧压力最大为(394.36±21.00)g，最大拉力为(134.92±20.81)g，右侧最大压力为(443.04±15.22)g，最大拉力为(144.88±34.62)g。矫治力为0时左右两侧开口度值不一致。结论 颊侧多曲簧对牙列两侧产生矫治力有差异，当颊侧多曲簧产生应力值为0时，右侧开口度与左侧有差异。
关键词：颊侧多曲簧活动矫治器；早期矫治；矫治力
中图分类号：R783 文献标识码：A DOI：10.3969/j.issn.1006-1959.2018.13.048
, 百拇医药
文章编号：1006-1959(2018)13-0156-04
Abstract：Objective To simulate the opening and closing process of the buccal multi-curved spring through the three-dimensional force measuring instrument，and to measure the orthodontic force on the left and right sides for comparative study.Methods A medical stainless steel wire with a diameter of 0.8 mm was bent by the same person，and five different curved springs on the left and right sides were respectively bent.The buccal multi-curved spring sample is fixed on the three-dimensional force measuring instrument to simulate the change of stress in the opening and closing movement of the mouth.The buccal multi-curved spring appliance was used to generate the corrective force on both sides of the dentition during the opening and closing movement，and the difference was analyzed.Results During the movement of the opening and closing mouth，the magnitude of the orthodontic force is different on the left and right sides.The maximum pressure on the left side is(394.36±21.00)g，the maximum tensile force is(134.92±20.81)g，and the maximum pressure on the right side is(443.04±15.22)g.The maximum tensile force is(144.88±34.62)g.When the orthodontic force is 0， the opening degree values on both sides are inconsistent.Conclusion The buccal multi-curved spring has a difference in the orthodontic force on both sides of the dentition.When the stress value of the buccal multi-curved spring is 0，the right opening degree is different from the left side.
, http://www.100md.com
Key words：Buccal multi-curved spring active appliance；Early correction；Corrective force
頰侧多曲簧活动矫治器由哈医大二院侯录教授等发明的一种活动矫治器[1]。它是一种主要用于治疗乳牙期、替牙期以及恒牙早期错牙合畸形的活动矫治器[2-4]。由包绕上下牙列的上下牙合托及分别位于左右两侧连接牙合托的颊侧多曲簧组成。其矫治错牙合畸形的核心部件为两侧的多曲簧，曲簧压缩产生适宜的矫治力，分别作用于上下牙合托，由其传递至颌骨，实现矫治错牙合畸形矫治的目的[5，6]。颊侧多曲簧活动矫治器在开闭口运动过程中，在口内其力值变化为闭口时压力值最大，开口后压力值随开口位移量增加而减小，至某一开口度减小为零，随着开口度进一步增加，产生对矫治不利的拉应力值[7-9]。近年来，针对这一矫治技术在生物力学机制、矫治力作用大小、方向及临床加力量等方面进行了大量的研究[10，11]。由于颊侧多曲簧结构设计复杂，临床矫正过程中两侧曲簧产生的矫治力大小，可能存在差异。针对开闭口运动过程中，两侧同时产生的矫治力大小的测量尚未见相关研究。
1材料与方法
1.1材料 选取同一批次直径为0.8 mm的医用不锈钢丝1Cr18Ni9，为保持其一致性由同一人分别弯制左右两侧颊侧多曲簧高度为16 mm长度14 mm各5个，见图1。, http://www.100md.com(徐舰 王培军 徐实谦 刘萧遥 逯荫)
关键词：颊侧多曲簧活动矫治器；早期矫治；矫治力
中图分类号：R783 文献标识码：A DOI：10.3969/j.issn.1006-1959.2018.13.048
, 百拇医药
文章编号：1006-1959(2018)13-0156-04
Abstract：Objective To simulate the opening and closing process of the buccal multi-curved spring through the three-dimensional force measuring instrument，and to measure the orthodontic force on the left and right sides for comparative study.Methods A medical stainless steel wire with a diameter of 0.8 mm was bent by the same person，and five different curved springs on the left and right sides were respectively bent.The buccal multi-curved spring sample is fixed on the three-dimensional force measuring instrument to simulate the change of stress in the opening and closing movement of the mouth.The buccal multi-curved spring appliance was used to generate the corrective force on both sides of the dentition during the opening and closing movement，and the difference was analyzed.Results During the movement of the opening and closing mouth，the magnitude of the orthodontic force is different on the left and right sides.The maximum pressure on the left side is(394.36±21.00)g，the maximum tensile force is(134.92±20.81)g，and the maximum pressure on the right side is(443.04±15.22)g.The maximum tensile force is(144.88±34.62)g.When the orthodontic force is 0， the opening degree values on both sides are inconsistent.Conclusion The buccal multi-curved spring has a difference in the orthodontic force on both sides of the dentition.When the stress value of the buccal multi-curved spring is 0，the right opening degree is different from the left side.
, http://www.100md.com
Key words：Buccal multi-curved spring active appliance；Early correction；Corrective force
頰侧多曲簧活动矫治器由哈医大二院侯录教授等发明的一种活动矫治器[1]。它是一种主要用于治疗乳牙期、替牙期以及恒牙早期错牙合畸形的活动矫治器[2-4]。由包绕上下牙列的上下牙合托及分别位于左右两侧连接牙合托的颊侧多曲簧组成。其矫治错牙合畸形的核心部件为两侧的多曲簧，曲簧压缩产生适宜的矫治力，分别作用于上下牙合托，由其传递至颌骨，实现矫治错牙合畸形矫治的目的[5，6]。颊侧多曲簧活动矫治器在开闭口运动过程中，在口内其力值变化为闭口时压力值最大，开口后压力值随开口位移量增加而减小，至某一开口度减小为零，随着开口度进一步增加，产生对矫治不利的拉应力值[7-9]。近年来，针对这一矫治技术在生物力学机制、矫治力作用大小、方向及临床加力量等方面进行了大量的研究[10，11]。由于颊侧多曲簧结构设计复杂，临床矫正过程中两侧曲簧产生的矫治力大小，可能存在差异。针对开闭口运动过程中，两侧同时产生的矫治力大小的测量尚未见相关研究。
1材料与方法
1.1材料 选取同一批次直径为0.8 mm的医用不锈钢丝1Cr18Ni9，为保持其一致性由同一人分别弯制左右两侧颊侧多曲簧高度为16 mm长度14 mm各5个，见图1。, http://www.100md.com(徐舰 王培军 徐实谦 刘萧遥 逯荫)