대한치과교정학회지 (The korean journal of orthodontics)

  • 제44권4호
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  • Pages.177-183
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  • 2014
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
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Geometrical design characteristics of orthodontic mini-implants predicting maximum insertion torque

  • Katic, Visnja (Department of Pediatric Dentistry and Orthodontics, School of Medicine, University of Rijeka) ;
  • Kamenar, Ervin (Department of Mechanical Engineering Design, Faculty of Engineering, University of Rijeka) ;
  • Blazevic, David (Department of Mechanical Engineering Design, Faculty of Engineering, University of Rijeka) ;
  • Spalj, Stjepan (Department of Pediatric Dentistry and Orthodontics, School of Medicine, University of Rijeka)
  • 투고 : 2013.07.19
  • 심사 : 2013.11.15
  • 발행 : 2014.07.25
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초록

Objective: To determine the unique contribution of geometrical design characteristics of orthodontic mini-implants on maximum insertion torque while controlling for the influence of cortical bone thickness. Methods: Total number of 100 cylindrical orthodontic mini-implants was used. Geometrical design characteristics of ten specimens of ten types of cylindrical self-drilling orthodontic mini-implants (Ortho Easy$^{(R)}$, Aarhus, and Dual Top$^{TM}$) with diameters ranging from 1.4 to 2.0 mm and lengths of 6 and 8 mm were measured. Maximum insertion torque was recorded during manual insertion of mini-implants into bone samples. Cortical bone thickness was measured. Retrieved data were analyzed in a multiple regression model. Results: Significant predictors for higher maximum insertion torque included larger outer diameter of implant, higher lead angle of thread, and thicker cortical bone, and their unique contribution to maximum insertion torque was 12.3%, 10.7%, and 24.7%, respectively. Conclusions: The maximum insertion torque values are best controlled by choosing an implant diameter and lead angle according to the assessed thickness of cortical bone.

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  6. Influence of the Geometric Characteristics of the Mini-Implants on Mechanicals Properties Using Artificial Bone Similar to Anterior, Middle and Posterior Regions of the Jaws vol.930, pp.None, 2018, https://doi.org/10.4028/www.scientific.net/msf.930.276
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