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目的观察牙周炎伸长的前、后牙经种植体支抗压低后根吸收的情况,并与无伸长牙的正畸患者进行比较。方法选择成人牙周炎前牙扇形散开伸长的患者和因对合磨牙缺失造成上颌第一磨牙伸长的成人正畸患者各20例,运用种植体支抗压低伸长牙。通过治疗前后的CBCT片分别对伸长前牙、后牙和相关对照组进行分级定量和定量分析,比较治疗前后的差异。对伸长后牙和对照组组内不同牙根的根吸收量进行方差分析。结果矫治后均有轻度牙根吸收(P<0.05),伸长组牙根吸收程度较对照组大,但二组间差别无统计学意义。第一磨牙不同牙根间的牙根吸收也有差别,但之间的差别无统计学意义。结论正畸治疗会导致一定量的牙根吸收,是少量且可接受的,同时压低伸长牙并不会导致更严重的牙根吸收。通过种植体支抗压低伸长牙是有效,安全的。
Objective To observe the root resorption of implants in the anterior and posterior teeth with prolonged periodontitis and compare them with orthodontic patients without extensor teeth. Methods 20 adult Orthodontic patients with maxillary first molar tooth loss caused by missing molar teeth were selected in this study. The CBCT films before and after treatment were used to classify the quantitatively and quantitatively the anterior teeth, posterior teeth and related control groups respectively, and to compare the differences before and after treatment. An analysis of variance was performed on the root resorption of different tooth roots in the stretched posterior teeth and the control group. Results All patients underwent mild root resorption (P <0.05). The root resorption in the elongation group was larger than that in the control group, but there was no significant difference between the two groups. There was also a difference in root resorption between different root tips of the first molar, but the difference was not statistically significant. Conclusion Orthodontic treatment results in a small amount of acceptable root resorption, while lowering the teeth does not result in more severe root resorption. It is effective and safe to lower the elongation teeth with implant support.