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目的研究替牙期AngleⅢ类错患儿矫治前后咀嚼效能的变化。方法 18例替牙期安氏Ⅲ类错患者,应用雪橇式口内固定装置进行上颌前方牵引治疗,用吸光度法测定治疗前后的咀嚼效能。18名个别正常儿童为对照组。结果前方牵引矫治AngleⅢ类错后与矫治前吸光度值变化差异有统计学意义(P<0.01),前者大于后者。结论雪橇式上颌前方牵引器早期矫治反不仅能改变侧貌,还能提高患儿咀嚼功能。
Objective To study the changes of masticatory efficiency before and after treatment of AngleⅢ malocclusion in dentition. Methods 18 cases of malocclusion of Angle class Ⅲ malocclusion were treated with sled type internal fixation device in front of the maxillary traction and absorbance method was used to determine the masticatory efficacy before and after treatment. 18 individual children with normal as control group. Results There was significant difference in the change of absorbance value between the Angle ¢ ó-class ¢ ò and the correction before treatment (P <0.01). The former was greater than the latter. Conclusion Sledged maxillary anterior traction device early treatment of reverse not only can change the profile, but also improve children’s chewing function.