Stability of a Locking Plate and Self-Drilling Screws as Orthodontic Skeletal Anchorage in the Maxilla: A Retrospective Study
Stability of a Locking Plate and Self-Drilling Screws as Orthodontic Skeletal Anchorage in the Maxilla: A Retrospective Study
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DOI：
10.1016/j.joms.2009.09.020
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发表时间：
2010-08-01
影响因子：
1.9
通讯作者：
Sakai, Masaru
中科院分区：
文献类型：
--
作者：
Hibi, Hidebaru;Sakai, Kiyoshi;Sakai, Masaru
目的：本回顾性研究的目的是确定由锁定板和2颗自钻螺钉组成的正畸骨骼锚固系统侵入上磨牙的成功率，并检测影响其稳定性的因素。患者和方法：研究对象为32例正畸和一般健康的患者，他们在骨上和单侧或双侧放置骨锚板。如果支抗板在上磨牙侵入期间保持稳定，无任何移动、持续疼痛或感染，然后无困难地拔出支抗板，则认为支抗板成功。根据临床分类变量统计分析支抗板的成功率。结果：32例患者男性6例，女性26例，年龄11.4 ~ 35.1岁。61块钢板的总成功率为93.4%。根据性别、年龄、放置侧位和螺钉长度分析各自的成功率，没有观察到显著差异。成功组支撑螺钉的骨壁厚度明显增加（平均1.6 +/- SD, 0.2 vs 1.0 +/- 0.1 mm, P < 0.001）。结论：骨厚度是支撑自钻孔螺钉和锁定钢板的关键因素。钢板+ 2颗螺钉联合的骨锚定在较厚的骨上比在上颌壁1.1 ~ 14mm范围内的厚度阈值下成功率更高。2010美国口腔颌面外科医师协会[J] .口腔颌面外科杂志，68:1783-1787,2010
Purpose: The aim of this retrospective study was to determine the success rate of an orthodontic skeletal anchorage system consisting of a locking plate and 2 self-drilling screws to intrude the upper molars and detect factors that contribute to its stability.Patients and Methods: The subjects were 32 orthodontic and generally healthy patients who had skeletal anchorage plates placed supraperiosteally and unilaterally or bilaterally. The anchorage plate was considered successful if the plate remained stable throughout the period of intrusion of the upper molar without any movement, persistent pain, or infection and was then retrieved without difficulty. The success rates of the anchorage plate were statistically analyzed on the basis of clinically categorized variables.Results: The 32 patients comprised 6 male and 26 female individuals with ages ranging from 11.4 to 35.1 years. The overall success rate of the total 61 plates was 93.4%. No significant differences were observed among the respective success rates analyzed in accordance with gender, age, side of placement, and length of the screws. The thickness of the bony walls that supported the screws was significantly greater in the success group (mean 1.6 +/- SD, 0.2 vs 1.0 +/- 0.1 mm, P < .001).Conclusion: Bone thickness is a critical factor in supporting the self-drilling screws and locking plate. Skeletal anchorage combining the plate and 2 screws promises a higher success rate with a thicker bone than with the threshold value of thickness that exists within the 1.1 to 1 4 mm range in the maxillary walls. 2010 American Association of Oral and Maxillofacial Surgeons J Oral Maxillofac Surg 68:1783-1787, 2010