모바일 메뉴

KJO Korean Journal of Orthodontics

Open Access

pISSN 2234-7518
eISSN 2005-372X
QR Code QR Code

퀵메뉴 버튼

Article

home All Articles View
Split Viewer

Original Article

Korean J Orthod 2011; 41(5): 354-360

Published online October 30, 2011 https://doi.org/10.4041/kjod.2011.41.5.354

Copyright © The Korean Association of Orthodontists.

The effects of different pilot-drilling methods on the mechanical stability of a mini-implant system at placement and removal: a preliminary study

Il-Sik Cho, MSD, aHyeRan Choo, MSD, bSeong-Kyun Kim, DDS, MSD, PhD, cYun-Seob Shin, MSD, dDuck-Su Kim, DDS, MSD, PhD, eSeong-Hun Kim, DDS, MSD, PhD, gKyu-Rhim Chung, DDS, MSD, PhD, f and John C. Huang, DDS, MSD, PhDh

aGraduate Student, Department of Orthodontics, School of Dentistry, Seoul National University, Korea.
bDirector, Department of Craniofacial Orthodontics, Childrens' Hospital of Phildelphia, USA.
cAssociate Professor, Department of Prosthodontics, School of Dentistry, Seoul National University, Korea.
dGraduate Student, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
eClinical Fellow, Department of Restorative Dentistry, School of Dentistry, Kyung Hee University, Korea.
fProfessor and Chairman, Department of Dentistry, School of Medicine, Ajou University, Korea.
gAssociate Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
hClinical Associate Professor, Division of Orthodontics, Department of Orofacial Science, University of California SanFrancisco, USA.

Correspondence to: Seong-Hun Kim. Department of Orthodontics, School of Dentistry, Kyung Hee University, 1 Hoeigi-dong, Dongdaemun-gu, Seoul 130-701, Korea. +82 2 958 9392; Email: bravortho@hanmail.net

Received: May 30, 2011; Revised: September 20, 2011; Accepted: September 21, 2011

Abstract

Objective

To investigate the effects of different pilot-drilling methods on the biomechanical stability of self-tapping mini-implant systems at the time of placement in and removal from artificial bone blocks.

Methods

Two types of artificial bone blocks (2-mm and 4-mm, 102-pounds per cubic foot [102-PCF] polyurethane foam layered over 100-mm, 40-PCF polyurethane foam) were custom-fabricated. Eight mini-implants were placed using the conventional motor-driven pilot-drilling method and another 8 mini-implants were placed using a novel manual pilot-drilling method (using a manual drill) within each of the 2-mm and 4-mm layered blocks. The maximum torque values at insertion and removal of the mini-implants were measured, and the total energy was calculated. The data were statistically analyzed using linear regression analysis.

Results

The maximum insertion torque was similar regardless of block thickness or pilot-drilling method. Regardless of the pilot-drilling method, the maximum removal torque for the 4-mm block was statistically higher than that for the 2-mm block. For a given block, the total energy at both insertion and removal of the mini-implant for the manual pilot-drilling method were statistically higher than those for the motor-driven pilot-drilling method. Further, the total energies at removal for the 2-mm block was higher than that for the 4-mm block, but the energies at insertion were not influenced by the type of bone blocks.

Conclusions

During the insertion and removal of mini-implants in artificial bone blocks, the effect of the manual pilot-drilling method on energy usage was similar to that of the conventional, motor-driven pilot-drilling method.

Keywords: Anchorage, Implant design, Surface treatment, Orthodontic mini-implant

Article

Original Article

Korean J Orthod 2011; 41(5): 354-360

Published online October 30, 2011 https://doi.org/10.4041/kjod.2011.41.5.354

Copyright © The Korean Association of Orthodontists.

The effects of different pilot-drilling methods on the mechanical stability of a mini-implant system at placement and removal: a preliminary study

Il-Sik Cho, MSD, aHyeRan Choo, MSD, bSeong-Kyun Kim, DDS, MSD, PhD, cYun-Seob Shin, MSD, dDuck-Su Kim, DDS, MSD, PhD, eSeong-Hun Kim, DDS, MSD, PhD, gKyu-Rhim Chung, DDS, MSD, PhD, f and John C. Huang, DDS, MSD, PhDh

aGraduate Student, Department of Orthodontics, School of Dentistry, Seoul National University, Korea.
bDirector, Department of Craniofacial Orthodontics, Childrens' Hospital of Phildelphia, USA.
cAssociate Professor, Department of Prosthodontics, School of Dentistry, Seoul National University, Korea.
dGraduate Student, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
eClinical Fellow, Department of Restorative Dentistry, School of Dentistry, Kyung Hee University, Korea.
fProfessor and Chairman, Department of Dentistry, School of Medicine, Ajou University, Korea.
gAssociate Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea.
hClinical Associate Professor, Division of Orthodontics, Department of Orofacial Science, University of California SanFrancisco, USA.

Correspondence to: Seong-Hun Kim. Department of Orthodontics, School of Dentistry, Kyung Hee University, 1 Hoeigi-dong, Dongdaemun-gu, Seoul 130-701, Korea. +82 2 958 9392; Email: bravortho@hanmail.net

Received: May 30, 2011; Revised: September 20, 2011; Accepted: September 21, 2011

Abstract

Objective

To investigate the effects of different pilot-drilling methods on the biomechanical stability of self-tapping mini-implant systems at the time of placement in and removal from artificial bone blocks.

Methods

Two types of artificial bone blocks (2-mm and 4-mm, 102-pounds per cubic foot [102-PCF] polyurethane foam layered over 100-mm, 40-PCF polyurethane foam) were custom-fabricated. Eight mini-implants were placed using the conventional motor-driven pilot-drilling method and another 8 mini-implants were placed using a novel manual pilot-drilling method (using a manual drill) within each of the 2-mm and 4-mm layered blocks. The maximum torque values at insertion and removal of the mini-implants were measured, and the total energy was calculated. The data were statistically analyzed using linear regression analysis.

Results

The maximum insertion torque was similar regardless of block thickness or pilot-drilling method. Regardless of the pilot-drilling method, the maximum removal torque for the 4-mm block was statistically higher than that for the 2-mm block. For a given block, the total energy at both insertion and removal of the mini-implant for the manual pilot-drilling method were statistically higher than those for the motor-driven pilot-drilling method. Further, the total energies at removal for the 2-mm block was higher than that for the 4-mm block, but the energies at insertion were not influenced by the type of bone blocks.

Conclusions

During the insertion and removal of mini-implants in artificial bone blocks, the effect of the manual pilot-drilling method on energy usage was similar to that of the conventional, motor-driven pilot-drilling method.

Keywords: Anchorage, Implant design, Surface treatment, Orthodontic mini-implant