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http://dx.doi.org/10.4041/kjod.2011.41.5.354

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

Cho, Il-Sik (Department of Orthodontics, School of Dentistry, Seoul National University)
Choo, Hye-Ran (Department of Craniofacial Orthodontics, Childrens' Hospital of Phildelphia)
Kim, Seong-Kyun (Department of Prosthodontics, School of Dentistry, Seoul National University)
Shin, Yun-Seob (Department of Orthodontics, School of Dentistry, Kyung Hee University)
Kim, Duck-Su (Department of Restorative Dentistry, School of Dentistry, Kyung Hee University)
Kim, Seong-Hun (Department of Orthodontics, School of Dentistry, Kyung Hee University)
Chung, Kyu-Rhim (Department of Dentistry, School of Medicine, Ajou University)
Huang, John C. (Division of Orthodontics, Department of Orofacial Science, University of California SanFrancisco)
Publication Information
The korean journal of orthodontics / v.41, no.5, 2011 , pp. 354-360 More about this Journal
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;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
연도 인용수 순위
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