Miniscrew Installation Area and Condition on Maxillary Palatal Side

상악구개측 미니스크류 식립위치 및 조건

  • Lee, Ki-Yeon (Department of Orthodontics, School of Dentistry, Dankook University) ;
  • Lee, Jin-Woo (Department of Orthodontics, School of Dentistry, Dankook University)
  • 이기연 (단국대학교 치과대학부속 치과병원 교정학교실) ;
  • 이진우 (단국대학교 치과대학부속 치과병원 교정학교실)
  • Received : 2009.02.10
  • Accepted : 2009.03.25
  • Published : 2009.03.31


Anchorage control is important in orthodontic treatment. Recently miniscrew is widly used as maximum anchorage in orthodontic treatment, and then it is important to install miniscrew safely without damaging adjacent anatomic structure. In a view of Miniscrew's stability, maxilla is unfavorable than mandible, and moreover maxillary soft buccal bone has disadvantage on stability. so palatal area comes into notice for installation area. We measured distance between palatal roots and bone thickness at midpalatal area using 3D computed tomography, and have found following results. 1. On the comparison of distance between palatal roots, the distance between 2nd premolar and 1st molar was significantly longest and the distance between premolars was significantly shortest. 2. Going toward lateral area from midpalatal suture and posterior area from zero point, bone thickness significantly became shorter and shorter. And 5.0mm palatal sagittal plane has more significance decrease of bone thickness than 2.5mm palatal sagittal plane. According to these results, we can conclude that the palatal installation of miniscrew between 2nd premolar and 1st molar is safest. And it is more safe that comes closer to midpalatal suture and to anterior area in regard to incisive canal.


  1. Creekmore TD, Eklund MK. The possibibity of skeletal anchorage.J Chin Orthod 1983;17:266-9
  2. Wehrbein H, Glatzmaier J, Mundwiller U, Diedrich P. The Orthosystem - a new implant system for orthodontic anchorage in the palate. J Orofac Orthop 1996;57:142-53
  3. Wehrbein H, Merz BR, Diedrich P, Glatzmaier J. The use of palatal implants for orthodontic anchorage. Design and clinical application of the orthosystem. Clin Oral Implants Res 1996:7:410-6
  4. Block MS, Hoffman DR. A new device for absolute anchorage orthodontics. Am J Orthod Dentofacial Orthop 1995;107:251-8
  5. Tseng Y, Hsieh C, Chen C, Shen Y, HuangI, Chen C. The application of mini-implants for orthodontic anchorage. Int J Oral Maxillofac Surg 2006;35:704-7
  6. Cheng Sj, Tseng IY, Lee JJ, Kok Sh. A prospective study of the risk factors associated with failure of mini-implants used for orthodontic anchorage. Int J Oral Maxillofac Implants 2004;19:100-6
  7. Kanomi R. Mini-implant for orthodontic anchorage. J clin Orthod 1997;31:763-7
  8. Umemori M, Sugawara J. Skeletal anchorage system for openbite correction. Am J Orthod Dentofacial Orthop 1999;2:166-74
  9. Freudenthaler JW, Haas R, Bantleon HP. Bicortical titanium screws for critical orthodontic anchorage in the mandible: a preliminary report on clinical applications. Clin Oral Impl Res 2001;12:358-63
  10. Mish CE. Contemporary Implant Dentistry, Chapter 8.St Louis Mosby;1999
  11. Park HS, Jeong SH, Kwon OW. Factors affecting the clinical success of screw implants used as orthodontic anchorage. Am J Orthod Dentofacial Orthop 2006;130:18-25
  12. Miyawaki S, Koyama, Inoue M, Mishma K, Sugahara T, Takano-Yamamoto T. Factors associated with the stability of titanium screws placed in the posterior region for orthodontic anchorage. Am J Orthod Dentofac Orthop 2003:124:373-8
  13. Ohashi E, Pecho OE, Moron M, Lagravere MO. Implant vs screw loading protocols in orthodontic. Angle Orthod 2006;76:721-7
  14. Wehrbein H, Merz BR, Diedricd P, Palatal bone support for orthodontic implant anchorage- a clinial and radiorogical study. Europ J Orthod 1999;21: 65-70
  15. 조희상, 이진우. 미니스크류 식립 각도 및 부위에 대한 3차원적 연구.단국대학교 대학원 석사학위논문 2007
  16. Ummemori M, Sugawara J, Mitani H, Nagasaka H, Kawamura H. Skeletal anchorage system for open-bite correction. Am J Orthod Dentofacial Orthop 1999;115:166-74
  17. Masumoto T, Hayashi I, Kawamura A. : Relationship among facial type, buccolingual molar inclination, and cortical done thickness of the mandible. Eur J Orthod 2001;23:15-23
  18. Davarpanah M, Martinez H, Etienne E, Zabalegui, Mattout P, Chiche F, Michel JF. A prospective multicenter evaluation of 1583 3i implants 1-to 5-year data. Int J Oral Maxillofac Implants 2002;17: 820-8
  19. Waitzman AA, Posnick JC. Craniaofacial skeletal measurements based on computed tomography : Park I. Accuracy and reproducibility. Cleft Palate ranofac J 1992;29:112-117<0112:CSMBOC>2.3.CO;2
  20. Gainsforth BL, Higley LB. A study of orthodontic anchorage possibility in basal bone. Am J Oral Surg 1945;31:406-17
  21. 이찬주, 이진우. Skeletal anchorage system의 매식 위치에 따른 특성 연구. 석사학위논문 단국대학교 대학원 2002
  22. Costa A, Raffainal M, Melsen B. Miniscrew as orthodontic anchorage: A preliminary report. Int J Adult Orthod Orthgn Surg 1998;13:201-9
  23. 문은영, 이진우. 성견에서 구강내 고정원 미니스크류에 교정력 작용시 힘의 방향 및 적용양상에 따른 치조골의 초기 조직학적 변화에 관한 실험적 연구. 석사학위논문 단국대학교 대학원 2002
  24. 김상원, 이진우. 유성견 구강내 miniscrew에 적용된 다양한 힘의 크기에 따른 골 밀도 변화 연구. 석사학위논문 단국대학교 대학원 2002
  25. Friz U, Ehmer A, Diedrich P. Clinical suitability of titanium microscrews for orthodontic anchorage- preliminary experiences. J Orofac Orthop 2004:65: 410-8
  26. Buser D, Mericske-Stern R, Bernard JP, Behneke A, Behneke N, Hirt HP, Belser UC, Lang NP. Long-term evaluation of non-submerged ITI implants. Part I: 8-year life table analysis of a prospective multicenter study with 2359 implants. Clin Oral Implants Res 1997;8:161-72
  27. Benhart T, Vollgruber A, Gahaleitner O, Hass R. Alternative to the median region of the plate placement of an orthodontic implant. Clni Oral Impl Res 2000;11:595-601