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目的探讨使用微螺钉种植支抗压低伸长的上颌第一磨牙的临床效果。方法以微螺钉种植种植体为支抗压低33例患者伸长的上颌第一磨牙,共计53颗。在头颅侧位片上测量被压低牙齿颌面中点到腭平面的垂直距离,对比治疗前后结果的差异。结果经过3～7(平均4.47)个月的治疗,头影测量结果显示伸长的上颌第一磨牙压低了2～5.5(平均3.17)mm,X线片示磨牙根尖无明显吸收,牙槽骨高度无改变。结论以微螺钉种植体为支抗压低伸长的上颌第一磨牙是一种较好的有效的治疗方法。
Objective To investigate the clinical effect of using micro-screw to implant maxillary first molar with low elongation. Methods Twenty-three patients with maxillary first molar were impacted with micro-screw implants, totaling 53. The vertical distance between the mid-point of the maxillofacial dentition and the palatal plane was measured on the cephalometric slice to compare the differences between before and after treatment. Results After 3 to 7 (average 4.47) months of treatment, Cephalometric measurement showed that the elongated maxillary first molar was lowered by 2 to 5.5 (average 3.17) mm. The X-ray film showed no obvious absorption on the root tips of molars. No change in bone height. Conclusion It is a good and effective method to treat maxillary first molar with micro-screw implants.