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目的 :比较微种植体和J钩在矫治安氏Ⅱ类1分类上颌前突患者中的支抗效果。方法 :31例安氏Ⅱ类1分类上颌前突成人患者,根据患者的选择分为微种植体支抗组17例,采用微种植体支抗结合滑动法关闭上颌拔牙间隙和压低下颌磨牙;J钩组14例,采用滑动法结合J钩高位牵引及Ⅱ类颌间牵引关闭拔牙间隙。对矫治前、后的X线头颅定位侧位片进行测量,采用SPSS 16.0软件包比较2组间治疗前、后软硬组织变化的差异。结果:治疗前、后2组间SNB、ANB、MP-FH、U1-Y、U6-Y、L6-MP、NLA、UL-Y的变化差异具有统计学意义,而SNA、U1-SN、U1-X、U6-X组间无统计学差异。结论:在矫治安氏Ⅱ类1分类上颌前突患者中,微种植体较J钩的支抗作用更强,同时可以压低下颌磨牙,更有利于Ⅱ类面形的改善。
OBJECTIVE: To compare the effects of micro-implants and J-hooks in the treatment of Class Ⅱ division 1 maxillary protraction patients. METHODS: Thirty-one patients with Class Ⅱ division 1 maxillary protrusion were divided into two groups according to the patients’ choice: micro-implant anchorage group (n = 17), micro-implant support combined with sliding method to close maxillary extraction gap and lower mandibular molar. Hook group of 14 cases, the sliding method combined with high hook J hook traction and Ⅱ type intermaxillary traction to close the extraction gap. The X-ray cephalometric lateral radiographs before and after correction were measured. The changes of the soft and hard tissues before and after treatment were compared by using SPSS 16.0 software package. Results: The changes of SNB, ANB, MP-FH, U1-Y, U6-Y, L6-MP, NLA and UL-Y before and after treatment were statistically significant, -X, U6-X group no statistically significant difference. CONCLUSION: In the treatment of Class Ⅱ division 1 patients with maxillary protrusion, the micro-implants are more effective than the J-hook in reducing the mandibular molars, which is more conducive to the improvement of class Ⅱ surface shape.