Cortical Bone Thickness for Mini-implant Placement in Korean

  • Kim, Kyu-Tag (Department of Oral Anatomy, Chosun University School of Dentistry) ;
  • Yu, Sun-Kyoung (Department of Oral Anatomy, Chosun University School of Dentistry) ;
  • Lee, Myoung-Hwa (Department of Oral Anatomy, Chosun University School of Dentistry) ;
  • Lee, Yun-Ho (Department of Oral Anatomy, Chosun University School of Dentistry) ;
  • Kim, Hye-Ryun (Oral Biology Research Institute, Chosun University School of Dentistry) ;
  • Kim, Heung-Joong (Department of Oral Anatomy, Chosun University School of Dentistry)
  • Received : 2011.03.17
  • Accepted : 2011.04.22
  • Published : 2011.06.30

Abstract

Recently, mini-implant is popular in the orthodontic treatment due to its simplicity and convenient surgical procedure. The objective of this study is to provide the anatomical guideline for mini-implant placement by analysing the cortical bone thickness in Korean. Hemi-sections of sixteen maxillae and twenty-two mandibles with normal teeth were used. Interdental areas between the 1st premolar and the 2nd premolar (Group 1), the 2nd premolar and the 1st molar (Gruop 2), and the 1st molar and the 2nd molar (Group 3) were sectioned and then scanned. After setting the axis of teeth, the cortical bone thickness was measured at the distance of 2 mm, 4mm, 6 mm, and 8 mm from alveolar crest. The mean thickness of cortical bone in the maxilla according to distance from alveolar crest was $1.30\;{\pm}\;0.63\; mm$ (2 mm), $1.49\;{\pm}\;0.62\; mm$ (4mm), $1.72\;{\pm}\;0.64\; mm$ (6mm), and $1.90\;{\pm}\;0.90\; mm$ (8 mm) at the buccal side and $1.33\;{\pm}\;0.47 \;mm$, $1.31\;{\pm}\;0.45\; mm$, $1.37\;{\pm}\;0.55\; mm$, and $1.39\;{\pm}\;0.58 \;mm$ at the palatal side. In the mandible, that was $3.14\;{\pm}\;1.71 \;mm$, $4.31\;{\pm}\;2.22 \;mm$, $4.23\;{\pm}\;1.94 \;mm$, and $4.30\;{\pm}\;1.57\; mm$ at the buccal side and $1.98\;{\pm}\;0.88 \;mm$, $2.79\;{\pm}\;1.01\; mm$, $3.35\;{\pm}\;1.27$ mm, and $3.93\;{\pm}\;1.38\; mm$ at the lingual side. The buccal cortical bone thickness in the maxilla was decreased from Group 1 to Group 3, while the thickness of palatal side was no change. In the mandible, it did not show a tendency at the buccal side and it was decreased from Group 1 to Group 3 without significant difference at the lingual side. Therefore, the buccal side of the Group 1 and Group 2 in both the maxilla and mandible seems to be the most appropriate site for a mini-implant placement with taking the stability and retention.

Keywords

References

  1. Bae SM, Park HS, Kyung HM, Kwon OW, Sung JH. Clinical application of micro-implant anchorage. J Clin Orthod. 2002;36:298-302.
  2. Bernhart T, Vollgruber A, Gahleitner A, Dortbudak O, Haas R. Alternative to the median region of the palate for placement of an orthodontic implant. Clin Oral Implants Res. 2000;11:595-601. https://doi.org/10.1034/j.1600-0501.2000.011006595.x
  3. Block MS, Hoffman DR. A new device for absolute anchorage for orthodontics. Am J Orthod Dentofacial Orthop. 1995;107: 251-8. https://doi.org/10.1016/S0889-5406(95)70140-0
  4. Carano A, Velo S, Leone P, Siciliani G. Clinical applications of the miniscrew anchorage system. J Clin Orthod. 2005;39:9- 24.
  5. Costa A, Raffainl M, Melsen B. Miniscrew as orthodontic anchorage: a preliminary report. Int J Adult Orthod Orthognath Surg. 1998;13:201-9.
  6. Deguchi T, Nasu M, Murakami K, Yabuuchi T, Kamioka H, Takano-Yamamoto T. Quantitative evaluation of cortical bone thickness with computed tomographic scanning for orthodontic implants. Am J Orthod Dentofacial Orthop. 2006;129 :721.e7-2.
  7. Douglass JB, Killiany DM. Dental implants used as orthodontic anchorage. J Oral Implant. 1987;13:28-38.
  8. Hernandez LC, Montoto G, Puente Rodriguez M, Galban L, Martinez V. 'Bone map' for a safe placement of miniscrews generated by computed tomography. Clin Oral Impl Res. 2008;19:576-81. https://doi.org/10.1111/j.1600-0501.2007.01507.x
  9. Kanomi R. Mini-implant for orthodontic anchorage. J Clin Orthod. 1997;31:763-7.
  10. Kim HJ, Yun HS, Park HD, Kim DH, Park YC. Soft-tissue and cortical-bone thickness at orthodontic implant site. Am J Orthod Dentofacial Orthop. 2006;130:177-82. https://doi.org/10.1016/j.ajodo.2004.12.024
  11. Kyung HM, Park HS, Bae SM, Sung JH, Kim IB. Development of orthodontic micro-implants for intraoral anchorage. J Clin Orthod. 2003;37: 321-8.
  12. Masumoto T, Hayashi I, Kawamura A, Tanaka K, Kasai K. Relationships among facial type, buccolingual molar inclination, and cortical bone thickness of the mandible. Eur J Orthod. 2001;23:15-23. https://doi.org/10.1093/ejo/23.1.15
  13. Melsen B, Bosch C. Different approaches to anchorage: a survey and an evaluation. Angle Orthod. 1997;67:23-30.
  14. Melsen B, Petersen JK, Costa A. Zygoma ligature-an alternative form of maxillary anchorage. J Clin Orthod. 1998;32:154-8.
  15. Miyawaki S, Koyama I, Inoue M, Mishima 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 Dentofacial Orthop. 2003;123:373-8.
  16. Moon CH, Lee DG, Lee HS, Im JS, Baek SH. Factors associated with success rate of orthodontic miniscrews placed in the upper and lower posterior buccal region. Angle Orthod. 2008;78:101-6. https://doi.org/10.2319/121706-515.1
  17. Paik CH, Woo YJ, Boyd RL. Treatment of an adult patient with vertical maxillary excess using miniscrew fixation. J Clin Orthod. 2003;37:423-8.
  18. Park JT, Jeong RR, Kim KT, Kim SB, Hu KS, Kim HJ, Lim SH, Kim HJ. Maxillary soft tissue and cortical bone thickness for mini-implant placement. Korean J Phys Anthropol. 2008;21:215-24. https://doi.org/10.11637/kjpa.2008.21.3.215
  19. Poggio PM, Incorvatib C, Velo S, Carano A. "Safe zones" : a guide for miniscrew positioning in the maxillary and mandibular arch. Angle Orthod. 2006;76:191-7.
  20. Roberts WE, Helm FR, Marshal KJ, Gongloff RK. Rigid endosseous implants for orthodontic and orthopedic anchorage. Angle Orthod. 1989;59:247-56.
  21. Schlegel KA, Kinner F, Schlegel KD. The anatomic basis for palatal implants in orthodontics. Int J Adult Orthodon Orthognath Surg. 2002;17:133-9.
  22. Schweizer CM, Schlegel KA, Rudzki-Janson I. Endosseous dental implants in orthodontic therapy. Int Dent J. 1996;46:61-8.
  23. Tseng YC, Hsieh CH, Chen CH, Shen YS, Huang IY, Chen CM. The application of mini-implants for orthodontic anchorage. Int J Oral Maxillofac Surg. 2006;35:704-7. https://doi.org/10.1016/j.ijom.2006.02.018
  24. Tsunori M, Mashita M, Kasai K. Relationship between facial types and tooth and bone characteristics of the mandible obtained by CT scanning. Angle Orthod. 1998;68:557-62.