魏 威 龚仁国 肖海鹰四川省攀枝花市中西医结合医：口腔科，四川攀枝花617000

    微型种植支抗和口外支抗用于上颌前突畸形的效果比较

    魏威龚仁国肖海鹰

    四川省攀枝花市中西医结合医：口腔科，四川攀枝花617000

    目的比较微型种植支抗与口外支抗矫治上颌前突畸形的疗效。方法从2011年3月耀2013年2月于攀枝花市中西医结合医：就诊的患者中筛选出符合纳入条件的矫治结束的48例受试者，按照随机数字表法将其分为两组，微型种植支抗组(n=24)受试者应用微型种植支抗来加强支抗力度，口外支抗组(n=24)受试者应用头帽口外弓来加强支抗力度。测量其头颅侧位片，统计上颌中切牙内收量和压低量的变化值，上颌第一磨牙伸长与近中移动量，上颌中切牙倾斜度的变化值，平面尧下颌平面以及前颅底平面的位置变化。结果口外支抗组平面与前颅底平面的交角(SN-OP)尧前颅底平面的相对倾斜度(U1-SN)矫治前后比较差异有统计学意义(P约0.05)，微型种植支抗组上颌突度(SNA)尧SN-OP尧U1-SN尧上齿槽座点A至Nv的垂直距离(A-Nv)及上颌中切牙相的突度(U1-NP)矫治前后比较差异有统计学意义(P约0.05)，微型种植支抗组矫治后的SNA尧U1-SN尧A-Nv尧U1-NP明显好于口外支抗组，差异有统计学意义(P约0.05)，即微型种植支抗组比口外支抗组切牙内收更多，且上颌第一磨牙的近中移动更少。结论微型种植体比传统口外支抗在上颌前突的治疗中，前者可更好地改善患者的前突面型，有助于上颌前突的矫治。

    微型种植支抗曰口外支抗曰上颌前突畸形曰非拔牙矫治曰牙齿移动

    [Abstract]Objective To compare the therapeutic effect ofmini implant anchorage and extraoral anchorage formaxil—lary protrusion deformity.M ethods 48 cases of research objects after the end of correction confirmed to the inclusion criteria were screened from the patients treated in Integrated Traditional Chinese and Western Medicine Hospital of Panzhihua City from March 2011 to February 2013,and they were divided into two groups by random number table, micro implant anchorage group(n=24)was treated withmicro implant to strengthen the anchorage force,the extraoral anchorage group(n=24)was treated with headgear facebow to strengthen the anchorage force.The lateral cephalogram of the subjectswasmeasured.The changes ofmaxillary central incisor retraction and depress,the changes of themaxil—lary firstmolarmesialmovement and elongation,maxillary central incisors of the dip slope changes,and the relative position ofmandibular plane and anterior skull base plane were recoreded.Results The differences of SN-OP and U1-SN of extraoral anchorage group before treatmentand after treatmentwere statistically significant(P约0.05),the differ—ences of SNA,SN-OP,U1-SN,A-Nv and U1-NP ofmicro implant anchorage group before and after treatment were statistically significant(P约0.05),SNA,U1-SN,A-Nv and U1-NP ofmicro implant anchorage group after treatment were better than those of extraoral anchorage group,the differenceswere all statistically significant(P约0.05).The ad—duction degree of themicro implant anchorage group was higher than the extraoral anchorage group.And themaxillary firstmolar wasmoved less in the near.Conclusion Themicro implantanchorage have better control role for the forward and backward direction than the conventional extraoral anchor anti in the treatment ofmaxillary protrusion,the therapy can improve the treatment of protrusion type and con—tribute to themaxillary protrusion. ......