个性化微螺钉辅助上颌快速扩弓器的设计及应用研究

目的探讨个性化微螺钉辅助上颌快速扩弓治疗骨性上颌牙弓狭窄的有效性.方法样本包括骨性上颌牙弓狭窄病例60例(男23例,女37例),年龄11~34岁(平均20.4±5.9岁).使用个性化微螺钉辅助上颌快速扩弓器进行扩弓治疗,扩弓前和扩弓后拍摄锥形束CT(cone beam computer tomography,CBCT),取研究模型,对资料进行测量和统计分析.结果腭中缝扩开成功率为93.3%.上颌第一磨牙位置腭中缝宽度增加(3.06±1.27)mm(P<0.05),上颌第一磨牙牙间宽度增加(6.04±1.45)mm(P<0.05),上颌第一磨牙位置腭中缝宽度增量与上颌第一磨牙间宽度增量的比值为0.509±0.196.扩弓螺旋扩大(6.76±1.31)mm,上颌第一磨牙位置腭中缝宽度增量与扩弓器扩大量的比值为0.473±0.205.结论个性化微螺钉辅助上颌快速扩弓器能有效地扩大青少年和88.9%年轻成人的腭中缝,治疗骨性上颌牙弓狭窄.

Design and application of personalized microimplant-assisted rapid palatal expander

Objective To investigate the efficiency of personalized microimplant-assisted rapid palatal expansion in treating skeletal narrow upper arch.Methods 60 patients with skeletal narrow maxilla were included.The patients have an average 20.4±5.9 years old(ranged from 11 to 34 years),consisting of 23 male and 37 female.The constricted maxilla was treated by personalized microimplant-assisted rapid palatal expansion.CBCT and casts were taken before and after expansion.The data were measured and analyzed.Results The success rate of midpalatal suture expansion was 93.3%after treatment.The width of midpalatal suture and the width of dental arch at the maxillary first molar level increased significantly by(3.06±1.27)mm and(6.04±1.45)mm,respectively(P<0.05).The ratio of skeletal expansion to teeth expansion was 0.509±0.196.The amount of expander opening was(6.76±1.31)mm,and the ratio of skeletal expansion to screw expansion was 0.473±0.205.Conclusions The personalized microimplant-assisted rapid palatal expansion,which could successfully treat maxillary skeletal transverse discrepancy in adolescents and 88.9%young adult patients.