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学科主题: 口腔医学
题名:
A new method to evaluate the positional stability of a self-drilling miniscrew
作者: Chen, G.1; Chen, S.1; Zhang, X. Y.1; Jiang, R. P.1; Liu, Y.1; Shi, F. H.2; Xu, T. M.1
关键词: cone-beam computed tomography ; miniscrew ; orthodontic treatment ; stability
刊名: ORTHODONTICS & CRANIOFACIAL RESEARCH
发表日期: 2015-08-01
DOI: 10.1111/ocr.12065
卷: 18, 期:3, 页:125-133
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Dentistry, Oral Surgery & Medicine
研究领域[WOS]: Dentistry, Oral Surgery & Medicine
关键词[WOS]: HEAD FILM MEASUREMENTS ; ORTHODONTIC FORCES ; REMAIN STATIONARY ; MINI-IMPLANTS ; ANCHORAGE ; MAXILLARY ; RELIABILITY ; SUPERIMPOSITION ; REGISTRATION ; ARCH
英文摘要:

Structured Abstract

ObjectivesTo evaluate the positional stability of miniscrews during orthodontic treatment change in cone-beam computed tomography (CBCT).

Setting and Sample PopulationTwenty adult volunteers were enrolled.

MethodsIn all participants, at least two maxillary first premolars were extracted because of protrusion. Each volunteer received six miniscrews in the maxilla, including two loaded miniscrews to retract anterior teeth and four unloaded miniscrews. CBCT scans were obtained at the beginning of space closure (T1) and approximately 11.8months later (T2). Three-dimensional miniscrew models were constructed at T1 and T2, and the central axes were calculated using a principal component analysis (PCA) technique. Finally, we measured and compared the angle change of all the miniscrews from T1 to T2.

ResultsThe angle change values of the unloaded and loaded miniscrews were 1.641.25 degrees and 1.67 +/- 1.15 degrees, respectively. No significant differences in the angle change were observed.

ConclusionCone-beam computed tomography images revealed both the unloaded and loaded miniscrews to be positionally stable during en-masse retraction in this study.

语种: 英语
所属项目编号: NSFC81371192
项目资助者: National Natural Science Foundation of China
WOS记录号: WOS:000357522300001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/58048
Appears in Collections:北京大学口腔医学院_牙周科_期刊论文

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作者单位: 1.Peking Univ, Sch & Hosp Stomatol, Dept Orthodont, Beijing 100081, Peoples R China
2.Peking Univ, Key Lab Machine Percept, MOE, Beijing 100081, Peoples R China

Recommended Citation:
Chen, G.,Chen, S.,Zhang, X. Y.,et al. A new method to evaluate the positional stability of a self-drilling miniscrew[J]. ORTHODONTICS & CRANIOFACIAL RESEARCH,2015,18(3):125-133.
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