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目的为了确定两种在口腔中植入的正畸微型种植钉(OMIs)成功率的差异:初次植入的正畸微型种植钉(II-OMI)与再次植入相同类型的新种植钉(RI-OMI)的差异。方法此次研究对象由58位(19位男性,39位女性),平均年龄=21.78±5.85岁,为了在集体内收时形成强支抗在上颌后牙区颊侧的附着龈上至少接受过一个OMI(自攻型,2.0 mm上层直径和5 mm长度的圆锥形)的患者组成。如果植入一个OMI失败,新的一个会立即在邻近区域植入,或者在4到6周后再次植入在相同区域。最初植入的OMIs(II-OMI)总数为109个,再次植入的OMIs(RI-OMI)总数为34个。统计分析是用X2检验,生存率估计的乘积限法(Kaplan-Meier法),时序检验法(log-rank)以及COX比例风险回归模型完成的。结果成功率与平均持续时间分别是,II-OMI为75.2%和10.0个月,RI-OMI为66.7%和6.4个月。年龄,垂直骨面型以及植入位置与II-OMI和RI-OMI的成功率无关。时序检验显示植入在女性以及安氏III类错牙合的II-OMI更易失败。II-OMI在安氏III类错牙合的失败对照安氏I类错牙合的失败,相对风险为5.36(95%置信区间,2.008到14.31,P=0.001)。结论 II-OMI与RI-OMI的成功率没有统计学差异。性别与ANB角(上齿槽座点-鼻根点-下齿槽座点角)或许是能得到更好II-OMI结果的重要因素。
Objectives To determine the difference in the success rates of two OMIs implanted in the oral cavity: Primary implant orthodontic micro-implanting nailing (II-OMI) was compared with re-implanting the same type of new implant nailing (RI -OMI) differences. Methods The study consisted of 58 subjects (19 males and 39 females) with a mean age of 21.78 ± 5.85 years and received at least a few gagging on the buccal side of the maxillary posterior teeth One OMI (self-tapping, 2.0 mm upper diameter and 5 mm length conical) patients. If you fail to implant an OMI, the new one is immediately implanted in the adjacent area or implanted in the same area again after 4 to 6 weeks. The total number of initially implanted OMIs (II-OMIs) was 109 and the total number of reimplanted OMIs (RI-OMIs) was 34. Statistical analysis was performed using the X2 test, the Kaplan-Meier method, the log-rank test, and the COX proportional hazard regression model. Results The success rates and mean durations were 75.2% and 10.0 months for II-OMI and 66.7% for RI-OMI and 6.4 months, respectively. Age, vertical bone surface type, and implantation site were independent of the success rates of II-OMI and RI-OMI. Timing tests showed that II-OMI implanted in women and Class III malocclusion is more likely to fail. The failure of II-OMI in Class III malocclusion failed to control Class I malocclusion with a relative risk of 5.36 (95% confidence interval, 2.008 to 14.31, P = 0.001). Conclusion The success rates of II-OMI and RI-OMI are not statistically different. Sex and ANB angles (upper alveolar seating - nasal points - lower alveolar seating) may be important factors in achieving better II-OMI results.