自攻型微螺钉种植体支抗稳定性的临床研究  

A Clinical Study of Stability of Miniscrew Implant Used as Orthodontic Anchorage

作　　者：杭望雁[1] 夏春鹏[1] 侯铁军[1] 李岩[1] 

机构地区：[1]山东聊城市人民医院口腔正畸科,252000

出　　处：《中国口腔种植学杂志》2005年第4期178-180,共3页Chinese Journal of Oral Implantology

摘　　要：目的:研究自攻型微螺钉种植体加载正畸负荷后的稳定性。方法:本研究包括了15例成年患者,以植入上颌颧突的自攻型微螺钉作为前牙内收的颌内支抗。微螺钉植入2周后施力。加力前及加力后9个月分别拍摄X线头颅定位片,将头影测量片进行重叠,测量微螺钉的移位变化。结果:15例中6例患者的微螺钉伸出并向前移位(-0.5～1.5mm)。微螺钉头部平均向前移位0.4mm,有统计学意义(P<0.05)。结论:自攻型微螺钉种植体是一种稳定的支抗装置,但是在承载正畸负荷的过程中,并不保持绝对的稳定,部分微螺钉在正畸力作用下有移位。为了防止因种植体移位伤及临近的重要组织结构,建议自攻型微螺钉应植入在没有主要神经、血管通过的非齿槽骨区,或植入在齿槽间隔区,但种植体与牙根之间应留出2mm的安全距离。To study the stability of miniscrew anchorage under orthodontic force.Methods： Fifteen adult patients with miniscrews as the maxillary anchorage were included in this study. Miniscrews were inserted on the maxillary zygomatic buttress as a direct anchorage for anterior teeth retraction.Nickel - titaniun dosed - coil springs were placed for the retraction 2 weeks after insertion of the miniscrews. Cephalometric radiographs were taken immediately before force application and 9 months later. The cephalometric tracings were superimposed to determine any movement of the miniscrews. Results： The miniscrews were extruded and tipped orward （ - 0.5 to 1.5 mm） in 6 of the 15 patients. On average, the miniscrews tipped forward significantly, by 0.4 mm at the screws head. Conclusion： Miniscrews are a stable anchorage but do not remain absolutely stationary throughout orthodontic loading. They might move according to the orthodontic loading in some patients. To prevent miniscrews hitting any vital organs because of displacement, it is recommended that they be placed in a non - tooth- bearing area that has no foramen, major nerves, or blood vessel pathways, or in a tooth- bearing area allowing 2 mm of safety clearance between the miniscrew and dental root.

关 键 词：自攻型微螺钉种植体 正畸支抗 稳定性 

分 类 号：R783[医药卫生—口腔医学]