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《West China Journal of Stomatology》 2016-04
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Comparing study on the hyoid bone position after treatment of class Ⅲ malocclusion using improved appliance FR Ⅲ

Zhu Yuanping;Duan Yinzhong;Dept.of Stomatology,The Second People's Hospital of Yichang City,The Second People's Hospital of Three Gorges University;School of Stomatology,The Fourth Military Medical Uuiversity;  
Objective This study aims to compare the changes of hyoid bone position before and after treatment of Angle class Ⅲ malocclusion using improved appliance FR Ⅲ. Methods Forty patients with Angle class Ⅲ malocclusion were chosen and divided into two groups, namely, experimental and control. Each group had 20 patients. The young patients in the experimental group were treated using improved appliance FR Ⅲ, whereas those in the control group were treated using classic appliance FR Ⅲ. The hyoid bone position of the two groups were comparatively analyzed using an X-ray film before and after treatment. Results Compared with the condition before treatment, the condition after treatment showed that the hyoid bone position of young patients with Angle class Ⅲ malocclusion treated using improved appliance FR Ⅲ, H-FH, H-S, H-Ptm, and Ar-H-Me exhibited an increased angle(P0.01), whereas the hyoid bone position of those treated using H-MP and H-Gn showed a decreased angle(P0.01). The hyoid bone position of young patients with Angle class Ⅲ malocclusion treated using classic appliance FR Ⅲ, H-FH, H-S, and H-Ptm had an increased angle(P0.05). Moreover, the hyoid bone position of those treated using Ar-H-Me had an increased angle(P0.01), and the hyoid bone position of those treated using H-MP and H-RGn had a decreased angle(P0.05). Conclusion Compared with the hyoid bone position before treatment, the hyoid bone position after treatment of the young patients with Angle class Ⅲ malocclusion treated using improved appliance FR Ⅲ may move backward and downward, and the mandibular and hyoid bone position may move through clockwise rotation. The mandibular and hyoid bone position of young patients with Angle class Ⅲ malocclusion treated using classic appliance FR Ⅲ obtained a large angle by moving clockwise. The mandibular bone moves backward and downward, thereby improving the hyoid bone in backward and upward directions. This condition makes a significant difference in treating the hyoid bone position of young patients with functional Angle class Ⅲmalocclusion.
【CateGory Index】: R783.5
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1 Wang Hongwei1,Qi Suqing1,Wang Jianguo2,Cai Zhifang2,Li Chuang3.(1.Dept.of Orthodontics,Xingtai Eye Hospital,Xingtai 054001,China;2.Dept.of Orthodontics,Tianjin Stomatological Hospital,Tianjin 300041,China;3.Dept.of Stomatology,The Second Hospital of Shijiazhuang,Shijiazhuang 050051,China);Detection to changes in hyoid and tongue positions,and pharyngeal airway following mandibular setback surgery by cone beam CT[J];华西口腔医学杂志;2012-06
2 ZHU Yuanping1,PENG Youjian2,ZHANG Yuning1,LI Hongwen1.1.443000 Yichang,The Second Hospital of Yichang,Hubei Province,China;2.School of Stomatology Wuhan University;The position of hyoid bone after treatment of class Ⅲ malocclusion with FRⅢ appliance in children[J];实用口腔医学杂志;2011-02
【Co-citations】
Chinese Journal Full-text Database 3 Hits
1 Zhu Yuanping;Duan Yinzhong;Dept.of Stomatology,The Second People's Hospital of Yichang City,The Second People's Hospital of Three Gorges University;School of Stomatology,The Fourth Military Medical Uuiversity;;Comparing study on the hyoid bone position after treatment of class Ⅲ malocclusion using improved appliance FR Ⅲ[J];华西口腔医学杂志;2016-04
2 CHEN Jie;YANG Xueming;HUANG Yuanyuan;WU Yunong;Institute of Stomatology,School of Stomatology,Nanjing Medical University;;Evaluation of the respiratory function and sleep quality with the polysomnography(PSG),following mandibular retrognathia[J];口腔医学;2014-06
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