摘要
目的 通过对反矫治前、后及追踪复查的头影侧位片进行测量分析 ,说明功能调节器 (FR3)矫治乳牙反对上下颌骨及恒胚牙的生长发育具有重要意义。方法 FR3矫治乳前牙反 17例 ,男 8例 ,女 9例 ,年龄平均 5 .6岁。对矫治前、后及矫治后与追踪的头影侧位片进行测量分析。研究矫治乳牙反对恒牙胚及颌骨的影响 ,并追踪观察其矫治效果。结果 矫治后 Ptm- 6距、Ptm- ANS距、SNA角显著增大 ,上恒切牙胚向前发育 ;下颌后退 ,S- Ar距增大 ,SNB角及面角减小 ,下恒切牙胚位置后移 ;ANB角增大上下颌基骨关系明显改善 ;下面高及后面高增加。追踪研究表明 ,反解除后 ,Ptm- 6距、Ptm- ANS距、U1- NA距继续增大 ,其余观测值改变不明显。结论 说明 FR3不仅对早期反具有矫形作用 ,而且反的解除有利于发挥出潜在的生长发育潜力 ,因此应大力提倡对早期反尽早的针对病因予以矫治。
WT5”BZ]Object Through the analysis of the cephalograms during pretreatment, posttreatment and countercheck of curing crossbite, this study tried to reveal the importance of curing primary teeth crossbite using FR3 and the effect of this treatment on the development of maxilla, mandibular and permanent dental germ. Method There were 17 cases of primary teeth crossbite(8 male,9 female, mean age was 5.6) treated with FR3. Lateral cephalograms were taken and analyzed during pretreatment, posttreatment and countercheck of the patient. Result After the treatment, Ptm 6, Ptm ANS and SNA angle were significantly increase, permanent upper incisor germ revealed forward development, mandibular revealed backward development, S Ar increased, SNB angle and face angle decreased, the position of permanent lower incisor germ was drawback. The increase of ANB angle showed the improvement of the relationship of upper and lower base bone. Lower face high and posterior face high increased. The result of the countercheck of the patient revealed that Ptm 6,Ptm ANS and U1 NA continually increased after the cure of crossbite, the other values had no significantly change. Conclusion The result of this study showed orthopedic change in curing early crossbite using functional regulator and the early cure of crossbite was in favor of exerting potential development. Therefore the early pertinence treatment of crossbite should be advocated.
出处
《临床口腔医学杂志》
2000年第3期160-162,共3页
Journal of Clinical Stomatology
