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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。
Objective To evaluate the effect of FR3 on the growth and development of the maxilla, mandible and the permanent teeth by measuring and analyzing the cephalometric films before and after the anti-glaucoma treatment and follow-up examination. Methods FR3 correction of 17 cases of anterior deciduous anterior teeth, 8 males and 9 females, mean age 5.6 years. Before and after treatment, and after correction and follow-up of the cephalometric films were measured and analyzed. To study the effect of correction of deciduous teeth on permanent tooth germ and jawbone, and to observe the effect of correction. Results The Ptm-6 distance, Ptm-ANS distance and SNA angle were significantly increased after treatment, and the upper and lower incisors were well developed. The mandibular retraction, S-Ar distance increased, SNB angle and facial angle decreased, The position of the embryo moved backwards; the ANB angle increased significantly and the relationship between the maxilla and the base was significantly improved; Tracing studies show that, after the lifting of anti-, Ptm-6 distance, Ptm-ANS distance, U1-NA distance continues to increase, the rest of the observations did not change significantly. The conclusion shows that FR3 not only has the orthopedic effect on the early stage, but also helps to exert the latent growth potential. Therefore, we should strongly advocate that the early stage of the early stage should be corrected.