The effects of different pilot-drilling methods on the mechanical stability of a mini-implant system at placement and removal: a preliminary study
조일식, 추혜란, 김성균, Shin Yun-Seob, 김덕수, 김성훈, 정규림, Huang John C.,
소속 상세정보
조일식 ( Cho Il-Sik ) - Seoul National University School of Dentistry Department of Orthodontics
추혜란 ( Choo Hye-Ran ) - Childrens’ Hospital of Phildelphia Department of Craniofacial Orthodontics
김성균 ( Kim Seong-Kyun ) - Seoul National University School of Dentistry Department of Prosthodontics
( Shin Yun-Seob ) - Kyung Hee University School of Medicine Department of Orthopaedic Surgery
김덕수 ( Kim Duck-Su ) - Kyung Hee University School of Dentistry Department of Restorative Dentistry
김성훈 ( Kim Seong-Hun ) - Kyung Hee University School of Dentistry Department of Orthodontics
정규림 ( Chung Kyu-Rhim ) - Ajou University School of Medicine Department of Dentistry
( Huang John C. ) - University of California SanFrancisco Department of Orofacial Science Division of Orthodontics
KMID : 0361920110410050354
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.
키워드
Anchorage; Implant design; Surface treatment; Orthodontic mini-implant
원문 및 링크아웃 정보
등재저널 정보