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

• 영문명: The effects of different pilot-drilling methods on the mechanical stability of a mini-implant system at placement and removal: a preliminary study
• 발행기관: 대한치과교정학회
• 저자명: Il-Sik Cho Hye Ran Choo Seong-Kyun Kim Yun-Seob Shin Duck-Su Kim Seong-Hun Kim Kyu-Rhim Chung John C
• 간행물 정보: 『The Korean Journal of Orthodontics』제41권 제5호, 354~360쪽, 전체 7쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2011.10.31

영문 초록

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