Jing Zheng, Wu Yeke, Jiang Wenlu, Zhao Lixing, Jing Dian, Zhang Nian, Cao Xiaoqing, Xu Zhenrui, Zhao Zhihe
Int J Oral Maxillofac Implants. 2016 Jul-Aug;31(4):835-41. doi: 10.11607/jomi.4197.
The purpose of this study was to evaluate the various factors that influence the success rate of miniscrew implants used as orthodontic anchorage.
Potential confounding variables examined were sex, age, vertical (FMA) and sagittal (ANB) skeletal facial pattern, site of placement (labial and buccal, palatal, and retromandibular triangle), arch of placement (maxilla and mandible), placement soft tissue type, oral hygiene, diameter and length of miniscrew implants, insertion method (predrilled or drill-free), angle of placement, onset and strength of force application, and clinical purpose. The correlations between success rate and overall variables were investigated by logistic regression analysis, and the effect of each variable on the success rate was utilized by variance analysis.
One hundred fourteen patients were included with a total of 253 miniscrew implants. The overall success rate was 88.54% with an average loading period of 9.5 months in successful cases. Age, oral hygiene, vertical skeletal facial pattern (FMA), and general placement sites (maxillary and mandibular) presented significant differences in success rates both by logistic regression analysis and variance analysis (P < .05).
To minimize the failure of miniscrew implants, proper oral hygiene instruction and effective supervision should be given for patients, especially young (< 12 years) high-angle patients with miniscrew implants placed in the mandible.
本研究旨在评估影响用作正畸支抗的微螺钉种植体成功率的各种因素。
所检查的潜在混杂变量包括性别、年龄、垂直（FMA）和矢状（ANB）骨骼面部模式、植入部位（唇侧和颊侧、腭侧以及下颌后三角）、植入牙弓（上颌和下颌）、植入软组织类型、口腔卫生、微螺钉种植体的直径和长度、植入方法（预钻孔或无钻孔）、植入角度、施力的开始时间和强度以及临床目的。通过逻辑回归分析研究成功率与总体变量之间的相关性，并通过方差分析利用每个变量对成功率的影响。
纳入114例患者，共植入253枚微螺钉种植体。总体成功率为88.54%，成功病例的平均加载期为9.5个月。通过逻辑回归分析和方差分析，年龄、口腔卫生、垂直骨骼面部模式（FMA）以及总体植入部位（上颌和下颌）在成功率方面均存在显著差异（P < 0.05）。
为使微螺钉种植体的失败率降至最低，应给予患者适当的口腔卫生指导和有效监督，尤其是对于下颌植入微螺钉种植体的年轻（<12岁）高角患者。
