微种植支抗钉加镍钛拉簧压低伸长磨牙的临床研究

To lower elongation molar with micro implant anchorage nail and Ni-Ti coil spring:a clinical study

目的对比观察微种植支抗钉加镍钛拉簧压低伸长磨牙的临床效果。方法选择60例上颌第一磨牙伸长的患者随机分成两组进行病例对照试验。其中30例应用微种植支抗钉加镍钛拉簧压低作为观察组,另外30例应用正畸片段弓压低作为对照组,比较两组平均压低时间、平均压入深度及疼痛程度。结果观察组患者平均压低时间短,平均压入深度深,与对照组比较差异均有统计学意义(P<0.05)。观察组轻微疼痛比率高于对照组,而中等疼痛以及剧烈疼痛比率低于对照组,差异均有统计学意义(P<0.05)。结论微种植支抗钉加镍钛拉簧压低伸长磨牙比正畸片段弓压低磨牙疗程短、痛苦少。

Objective To investigate the clinical effects of micro implant anchorage nail and NiTi coilspring to lower the elongation molar.Methods60patients with the first maxillary molar elongation were divided into2groups.30of them were treated with micro implant anchorage nail and NiTicoil spring to lower the molar(observation group),and the other30patients were treated with segmental arch to lower the molar(control group).The average lowering time,depth and pain degree of the2groups were compared.Results The average lowering time was faster and the overage lowering depth was greater in the observation group than that in the control group;the slight pain rate in the observation group was significantly higher than that in the control group(P<0.05),while the ratio of moderate pain and severe pain was significantly lower than that in the control group(P<0.05).Conclusion To lower the elongation molar with mi?cro implant anchorage nail and Ni?Ti coilspring might have shorter course and less pain.