1 210

Cited 104 times in

Insertion torque of orthodontic miniscrews according to changes in shape, diameter and length

Authors
 Seon-A Lim  ;  Jung-Yul Cha  ;  Chung-Ju Hwang 
Citation
 ANGLE ORTHODONTIST, Vol.78(2) : 234-240, 2008 
Journal Title
 ANGLE ORTHODONTIST 
ISSN
 0003-3219 
Issue Date
2008
MeSH
Bone Screws* ; Dental Implantation, Endosseous* ; Dental Stress Analysis ; Miniaturization ; Orthodontic Anchorage Procedures/instrumentation* ; Orthodontic Appliance Design* ; Regression Analysis ; Torque
Keywords
Miniscrew ; Insertion torque ; Diamete ; Length
Abstract
OBJECTIVE: To determine the variation in the insertion torque of orthodontic miniscrews according to the screw length, diameter, and shape. MATERIALS AND METHODS: The maximum insertion torque (MIT) was measured using a torque tester at a constant speed of 3 rotations per minute. Cylindrical and taper type of miniscrews (Biomaterials Korea Inc, Seoul, Korea) with different lengths, diameters, and pitches were tested. RESULTS: The results showed that the insertion torque significantly increased with increasing screw length (P < .01). In particular, there was a significant increase in torque with increasing screw length and diameter (P < .01). An analysis of the serial insertion torque of miniscrews revealed the cylindrical type screw to have much higher insertion torque at the incomplete screw thread, while the taper type screw showed a much higher insertion torque at the final inclination part of the screw thread. The insertion torque was affected by the outer diameter, length, and shape in that order. CONCLUSIONS: An increase in screw diameter can efficiently reinforce the initial stability of the miniscrew, but the proximity of the root at the implanted site should be considered.
Full Text
http://www.angle.org/doi/full/10.2319/121206-507.1
DOI
10.2319/121206-507.1
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/22282913/108252
사서에게 알리기
  feedback

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse