摘要
目的:利用Cone-Beam CT测量支抗微螺钉周围骨密度值,探讨其与微螺钉稳定性的关系。方法:选取颌骨左右对称植入微螺钉后一侧松动而另一侧稳固的7名(共18枚微螺钉)正畸患者。拍摄CBCT,所得三维影像重建后用OnDemand 3DApplication软件对微螺钉骨内部分周围2mm范围内骨密度(以Hounsfield Unit表示)进行测量,自身对照比较分析双侧对称部位所植入微螺钉周围骨密度测量值间的差异。结果:松动微螺钉与稳定微螺钉骨内部分周围2mm范围内骨密度无统计学差异,两侧微螺钉钉尖部1/3、钉中部1/3及钉颈部1/3周围骨密度均无统计学差异。结论:微螺钉种植支抗的稳定性与其周围骨密度间未发现明显相关性。
Objective： To study the relationship between the bone mineral density around micro--screws and their stability with Cone--Beam CT. Methods.. 7 patients who received orthodontic treatment with micro--screw anchor- age were selected in this retrospective study. All of them had micro--screws implanted into symmetric locations, one screw became flexible while the other one stable. The total number of the micro--screws in this research was 18. CBCT films were taken after micro--screw were flexible, the DICOM data were reconstructed via OnDemand 3D Application software. The density of 2mm alveolar bone outside the micro--screws was evaluated, presented in Hounsfiled Unit. The difference of alveolar bone density between the loose and stable micro--screws were analyzed with self--control design. Results： No significant difference of the alveolar bone density outside the micro--screws were detected, no matter in the whole body, the tip, middle or neck area of them. Conclusion： No significant corre- lation between the alveolar bone density around micro--screwstand their stability was found.
出处
《口腔医学研究》
CAS
CSCD
2013年第6期547-550,共4页
Journal of Oral Science Research
