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目的:评价新型改良导弓矫治乳前牙反的临床疗效,研究其对恒牙胚及颌骨位置变化的影响。方法:20例乳前牙反患儿采用新型改良导弓进行矫治,对治疗前后X线头影测量值的变化进行分析。结果:应用新型改良导弓,20例患儿均矫治至正常咬合关系,疗程0.5～2.0个月。SNA、UI/NA、UI-NA、SNG、G-SN、G-SV、ANB、NA/PA、Wits的增加值,SNB、LI/MP、LI/NB的减小值均具有统计学意义(P<0.05),其余测量值变化无统计学意义(P>0.05)。结论:新型改良导弓矫治乳前牙反使上颌骨、乳上切牙明显向前移动,恒牙胚随之唇向移动。新型改良导弓同时具备机械及功能矫治的双重作用,可同时改善上下颌骨的位置关系,对预防恒牙期再度出现反有临床意义。
OBJECTIVE: To evaluate the clinical effect of the new modified guide arch on the treatment of antegrade anterior teeth of the anterior teeth and to study the effects of the new modified guide bow on the changes of the position of the permanent teeth and the jaw. Methods: Twenty newborn ankles were retrospectively analyzed with a new modified guide arch before and after treatment. Results: The application of a new modified guide bow, 20 cases of children were corrected to normal occlusion, treatment 0.5 to 2.0 months. The added value of SNA, UI / NA, UI-NA, SNG, G-SN, G- SV, ANB, NA / PA and Wits, SNB, LI / MP and LI / NB were all statistically significant P <0.05), the other measurements did not change significantly (P> 0.05). CONCLUSION: The new modified guide arch corrects the anterior crossbite of the anterior teeth so that the maxillary and maxillary incisors move forward significantly, and the permanent tooth germs move along with the lips. The new improved guide bow has both the mechanical and functional correction of the dual role, while improving the relationship between the position of the mandible, to prevent recurrence of permanent dentition has clinical significance.