Three-dimensional finite element analysis of the deformation of the human mandible: a preliminary study from the perspective of orthodontic mini-implant stability
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Objective: The aims of this study were to investigate mandibular deformation under clenching and to estimate its effect on the stability of orthodontic mini-implants (OMI). Methods: Three finite element models were constructed using computed tomography (CT) images of 3 adults with different mandibular plane angles (A, low; B, average; and C, high). An OMI was placed between #45 and #46 in each model. Mandibular deformation under premolar and molar clenching was simulated. Comparisons were made between peri-orthodontic mini-implant compressive strain (POMI-CSTN) under clenching and orthodontic traction forces (150 g and 200 g). Results: Three models with different mandibular plane angles demonstrated different functional deformation characteristics. The compressive strains around the OMI were distributed mesiodistally rather than occlusogingivally. In model A, the maximum POMI-CSTN under clenching was observed at the mesial aspect of #46 (1,401.75 microstrain [μE]), and similar maximum POMI-CSTN was observed under a traction force of 150 g (1,415 μE). Conclusions: The maximum POMI-CSTN developed by clenching failed to exceed the normally allowed compressive cortical bone strains; however, additional orthodontic traction force to the OMI may increase POMI-CSTN to compromise OMI stability.
Abstract
Objective: The aims of this study were to investigate mandibular deformation under clenching and to estimate its effect on the stability of orthodontic mini-implants (OMI). Methods: Three finite element models were constructed using computed tomography (CT) images of 3 adults with different mandibular plane angles (A, low; B, average; and C, high). An OMI was placed between #45 and #46 in each model. Mandibular deformation under premolar and molar clenching was simulated. Comparisons were made between peri-orthodontic mini-implant compressive strain (POMI-CSTN) under clenching and orthodontic traction forces (150 g and 200 g). Results: Three models with different mandibular plane angles demonstrated different functional deformation characteristics. The compressive strains around the OMI were distributed mesiodistally rather than occlusogingivally. In model A, the maximum POMI-CSTN under clenching was observed at the mesial aspect of #46 (1,401.75 microstrain [μE]), and similar maximum POMI-CSTN was observed under a traction force of 150 g (1,415 μE). Conclusions: The maximum POMI-CSTN developed by clenching failed to exceed the normally allowed compressive cortical bone strains; however, additional orthodontic traction force to the OMI may increase POMI-CSTN to compromise OMI stability.
참고문헌 (26)
- Creekmore TD, "The possibility of skeletal anchorage", J Clin Orthod, 17, pp.266~269 (1983)
- Kanomi R, "Mini-implant for orthodontic anchorage", J Clin Orthod, 31, pp.763~767 (1997)
- Kuroda S, "Clinical use of miniscrew implants as orthodontic anchorage: success rates and postoperative discomfort", Am J Orthod Dentofacial Orthop, 131, pp.9~15 (2007)
- Miyawaki S, "Factors associated with the stability of titanium screws placed in the posterior region for orthodontic anchorage", Am J Orthod Dentofacial Orthop, 124, pp.373~378 (2003)
- Chen Y, "Critical factors for the success of orthodontic mini-implants: a systematic review", Am J Orthod Dentofacial Orthop, 135, pp.284~291 (2009)
- Cheng SJ, "A prospective study of the risk factors associated with failure of mini-implants used for orthodontic anchorage", Int J Oral Maxillofac Implants, 19, pp.100~106 (2004)
- Korioth TW, "Deformation of the human mandible during simulated tooth clenching", J Dent Res, 73, pp.56~66 (1994)
- 모성서, "폐쇄성 수면무호흡 환자의 상기도 형태의 특징과 압력강하에 관한 3차원 전산유체역학해석", 대한치과교정학회지, 40(2), pp.66~76 (2010), 대한치과교정학회
- Sung SJ, "Effective enmasse retraction design with orthodontic miniimplant anchorage: a finite element analysis", Am J Orthod Dentofacial Orthop, 137, pp.648~657 (2010)
- Bonnet AS, "Biomechanical study of mandible bone supporting a four-implant retained bridge: finite element analysis of the influence of bone anisotropy and foodstuff position", Med Eng Phys, 31, pp.806~815 (2009)
- Gray H, "Anatomy of the human body. 30th ed" (1985), Lea & Febiger
- Gilroy AM, "Atlas of Anatomy" (2008), Thieme
- Hylander WL, "The functional significance of primate mandibular form", J Morphol, 160, pp.223~240 (1979)
- O’Mahony AM, "Anisotropic elasticity of cortical and cancellous bone in the posterior mandible increases peri-implant stress and strain under oblique loading", Clin Oral Implants Res, 12, pp.648~657 (2001)
- Tsunori M, "Relationship between facial types and tooth and bone characteristics of the mandible obtained by CT scanning", Angle Orthod, 68, pp.557~562 (1998)
- Sato H, "Relationship between masticatory function and internal structure of the mandible based on computed tomography findings", Am J Orthod Dentofacial Orthop, 128, pp.766~773 (2005)
- Masumoto T, "Relationships among facial type, buccolingual molar inclination, and cortical bone thickness of the mandible", Eur J Orthod, 23, pp.15~23 (2001)
- Moon CH, "Relationship between vertical skeletal pattern and success rate of orthodontic mini-implants", Am J Orthod Dentofacial Orthop, 138, pp.51~57 (2010)
- Proffit WR, "Occlusal forces in normal- and long-face adults", J Dent Res, 62, pp.566~570 (1983)
- Braun S, "A study of bite force, part 2: Relationship to various cephalometric measurements", Angle Orthod, 65, pp.373~377 (1995)
- van Spronsen PH, "Long-face craniofacial morphology: Cause or effect of weak masticatory musculature?", Semin Orthod, 16, pp.99~117 (2010)
- Frost HM, "Suggested fundamental concepts in skeletal physiology", Calcif Tissue Int, 52, pp.1~4 (1993)
- Frost HM, "Transient-steady state phenomena in microdamage physiology: a proposed algorithm for lamellar bone", Calcif Tissue Int, 44, pp.367~381 (1989)
- Frost HM, "Wolff ’s Law and bone’s structural adaptations to mechanical usage: an overview for clinicians", Angle Orthod, 64, pp.175~188 (1994)
- 김광덕, "교정용 마이크로 임플란트의 나사산 디자인 최적화", 대한치과교정학회지, 41(1), pp.25~35 (2011), 대한치과교정학회
- Wawrzinek C, "Microdamage in cortical bone due to the overtightening of orthodontic microscrews", J Orofac Orthop, 69, pp.121~134 (2008)