两种颌托在颊侧多曲簧作用下对牙齿作用力的对比实验  

The force of two different kinds of denture bases on teeth under the function of the buccal multiloop appliance

作　　者：陈萍 王培军[1] 石瑛琦 徐实谦[2] 侯录[1] CHEN Ping;WANG Peijun;SHI Yingqi;XU Shiqian;HOU Lu(Department of Orthodontics,the Second Affiliated Hospital of Harbin Medical University,,Harbin 150000.China)

机构地区：[1]哈尔滨医科大学附属第二医院口腔正畸科,黑龙江哈尔滨150000 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150000

出　　处：《口腔医学》2021年第1期38-42,共5页Stomatology

摘　　要：目的比较自凝树脂材料和热压膜材料制作的颌托,在颊侧多曲簧矫治力的作用下对上下颌中切牙的力值,以期选用合适材料代替自凝树脂制作颌托,为解决在临床应用颊侧多曲簧矫治器矫治安氏Ⅲ类错牙合畸形过程中,部分患者前牙出现的唇舌向倾斜问题提供参考。方法口外模拟闭口位状态,将颊侧多曲弹簧依次矢状向打开2 mm、4 mm、6 mm、8 mm、10 mm,应用薄膜压力传感器微型测力系统,分别测量两种材料颌托在上、下颌中切牙产生的电压值,再依据关系式将电压值转化为力值,计算并比较两种材料颌托在不同长度多曲簧的矫治力作用下对上中切牙唇向、下中切牙舌向的力值大小,并对结果进行统计学分析。结果随着颊侧多曲簧长度的增加,两种材料颌托对上颌中切牙唇向、下颌中切牙舌向的力值均增大;在颊侧多曲簧增加相同长度时,热压膜颌托对上颌中切牙产生的唇向力值和对下颌中切牙产生的舌向力值均小于自凝树脂颌托,P<0.05。结论相较于自凝树脂,热压膜材料制成的颌托对上下颌中切牙的力值小,能够减少上下颌中切牙的倾斜,减轻牙效应。Objective To compare the forces on the upper and lower central incisors of bases made of different materials,self-curing resin materials and the thermoplastic materials,under the action of buccal multiple spring,hoping to choose proper materials to replace the bases made of self-curing resin and to solve the problem of anterior teeth inclination in patients treated with buccal multiloop appliance during the process of correcting ClassⅢmalocclusion.Methods According to voltage-force value relation,the voltage value could be converted into force value.The voltage on the incisors was measured by a thin film pressure sensor miniature force system when the buccal multiloop was opened for 2 mm,4 mm,6 mm,8 mm,10 mm respectively in the simulated closed position in vitro.Force values on the labial and lingual surfaces of the upper central incisors under the orthodontic force of different lengths of buccal multiloop springs were calculated and compared.Then the results were statistically analyzed.Results With the increase of the length of buccal multiloop,the force values produced by the two kinds of bases on the labial surface of maxillary central incisors and the lingual surface of mandibular central incisors increased.When the buccal multiloop was opened to the same length,the labial force values of the thermoplastic material base on maxillary central incisors and the lingual force values of mandibular central incisors of that were less than those of the self-curing resin base(P<0.05).Conclusion Compared with self-curing resin,the force value of the base made of the thermoplastic material on maxillary and mandibular central incisors is smaller,which can reduce the inclination of maxillary and mandibular central incisors and relieve the tooth effect.

关 键 词：颊侧多曲簧矫治器 自凝树脂 热压膜 薄膜压力传感器 

分 类 号：R783.5[医药卫生—口腔医学]