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Miniscrew stability evaluated with computerized tomography scanning

Authors
 Jung-Yul Cha  ;  Jae-Kyoung Kil  ;  Tae-Min Yoon  ;  Chung-Ju Hwang 
Citation
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, Vol.137(1) : 73-79, 2010 
Journal Title
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS 
ISSN
 0889-5406 
Issue Date
2010
MeSH
Alveolar Process/diagnostic imaging ; Alveolar Process/surgery ; Animals ; Bone Density ; Bone Screws* ; Dental Stress Analysis* ; Device Removal ; Dogs ; Equipment Failure Analysis ; Implants, Experimental ; Linear Models ; Orthodontic Anchorage Procedures/instrumentation* ; Orthodontic Appliance Design ; Tomography, X-Ray Computed ; Torque
Abstract
INTRODUCTION: In this study, we aimed to determine the effect of bone mineral density (BMD), cortical bone thickness (CBT), screw position, and screw design on the stability of miniscrews. METHODS: Ninety-six miniscrews of both cylindrical and tapered types were placed in 6 beagle dogs. The BMD and CBT were measured by computerized tomography and correlated with the placement and removal torque and mobility. A regression equation to predict the placement torque was calculated based on BMD, CBT, screw type, and screw position. RESULTS: The placement torque showed a positive correlation in the order of removal torque (0.66), BMD of the cortical bone (0.58), and CBT (0.48). Placement and removal torque values were significantly higher in the mandible compared with the maxilla. Tapered miniscrews had higher placement torque than did the cylindrical type (P <0.001). However, the removal torque was similar in both groups. Placement torque was affected by screw position, screw type, and BMD of cortical bone, in that order. CONCLUSIONS: BMD of cortical bone, screw type, and screw position significantly influence the primary stability of miniscrews
Full Text
http://www.sciencedirect.com/science/article/pii/S0889540609009962
DOI
10.1016/j.ajodo.2008.03.024
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Cha, Jung Yul(차정열)
Hwang, Chung Ju(황충주) ORCID logo https://orcid.org/0000-0003-3024-4551
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/100412
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