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

Cited 4 time in Web of Science Cited 4 time in Scopus
Authors
Cho, Il-Sik; Choo, HyeRan; Kim, Seong-Kyun; Shin, Yun-Seob; Kim, Seong-Hun; Huang, John C.; Chung, Kyu-Rhim; Kim, Duck-Su
Issue Date
2011-10
Publisher
KOREAN ASSOC ORTHODONTISTS
Citation
KOREAN JOURNAL OF ORTHODONTICS, Vol.41, No.5, pp.354-360
Keywords
AnchorageImplant designSurface treatmentOrthodontic mini-implant
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. (Korean J Orthod 2011;41(5):354-360)
ISSN
1225-5610
Language
English
URI
http://hdl.handle.net/10371/80541
DOI
https://doi.org/10.4041/kjod.2011.41.5.354
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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