Biomechanical influence of anchorages on orthodontic space closing mechanics by sliding method

This study aims to analyse the stress distributions and initial displacements of teeth during the space closing stage through a three-dimensional finite element method. Computed tomography images of a patient were used to reconstruct the detailed teeth and alveolar bone, and brackets with stainless steel archwire were modelled according to the orthodontic prescriptions. The second premolars and first molars were chosen as the anchorages in the model 6-force, with buccal tubes attached to the second molars in the model 6-force-7, and the second molars as additional anchorages in the model 7-force. The results indicated that a movement of lingual lateral inclination occurred on the incisors during the retraction, and the frictional force between the teeth and the archwire significantly reduced the stress on the teeth and periodontal structures. Graphical abstract Malocclusion is one of the most common issue in dentistry with high prevalence and orthodontic treatment need. The extraction of first premolar teeth was normally needed at the beginning of the treatment. And the straight wire appliance together with the sliding mechanics was used for space closure at the end of the treatment. However, side effects like root resorption also found after the surgery. Biomechanically, the stress distributions and initial displacements of teeth during space closing stage might be a crucial factor contributed to those undesirable side effects. And different selections of anchorages might alter the biomechanical environment during the treatment. Thus, the purpose of the current study was to analyse the stress distributions and initial displacements, with the different anchorage selections, of teeth during space closing stage through 3D finite element method.

[1]  M Gallas,et al.  A three-dimensional numerical simulation of mandible fracture reduction with screwed miniplates. , 2003, Journal of biomechanics.

[2]  Lei Zhang,et al.  [Three dimensional finite element analysis of maxillary anterior teeth retraction with micro-implant anchorage and sliding mechanics]. , 2009, Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology.

[3]  P K Turley,et al.  Analysis of stress in the periodontium of the maxillary first molar with a three-dimensional finite element model. , 1999, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[4]  富永 淳也,et al.  Optimal Loading Conditions for Controlled Movement of Anterior Teeth in Sliding Mechanics , 2009 .

[5]  Lars Bondemark,et al.  Prevalence and change of malocclusions from primary to early permanent dentition: a longitudinal study. , 2015, The Angle orthodontist.

[6]  Ming Zhang,et al.  Numerical simulation of tooth movement in a therapy period. , 2008, Clinical biomechanics.

[7]  Fan Yubo,et al.  Effects of Different Material Properties of Enamel and Pulp on the Stress Distributions of the Alveolar Tissues , 2010 .

[8]  R C Parkhouse,et al.  Rectangular wire and third-order torque: a new perspective. , 1998, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[9]  Rajat Mitra,et al.  Comparative evaluation of anchorage reinforcement between orthodontic implants and conventional anchorage in orthodontic management of bimaxillary dentoalveolar protrusion. , 2017, Medical journal, Armed Forces India.

[10]  Yoshiyuki Koga,et al.  Optimal loading conditions for controlled movement of anterior teeth in sliding mechanics. , 2009, The Angle orthodontist.

[11]  T. Meling,et al.  On bracket slot height: a methodologic study. , 1998, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[12]  R P Kusy,et al.  Comparison of the frictional coefficients for selected archwire-bracket slot combinations in the dry and wet states. , 2009, The Angle orthodontist.

[13]  Christoph Bourauel,et al.  Simulation of orthodontic tooth movements , 1999, Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie.

[14]  P M Sinclair,et al.  Predicting and preventing root resorption: Part II. Treatment factors. , 2001, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[15]  C J Burstone,et al.  Three-dimensional finite element analysis for stress in the periodontal tissue by orthodontic forces. , 1987, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[16]  J Cobo,et al.  Dentoalveolar stress from bodily tooth movement at different levels of bone loss. , 1996, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[17]  Yukio Kojima,et al.  A numerical simulation of tooth movement by wire bending. , 2006, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[18]  C G Matasa,et al.  Bracket angulation as a function of its length in the canine distal movement. , 1996, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[19]  C J Burstone,et al.  Moment to force ratios and the center of rotation. , 1988, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[20]  J Artun,et al.  Risk factors for apical root resorption of maxillary anterior teeth in adult orthodontic patients. , 1995, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[21]  Uwe Wolfram,et al.  Periodontal ligament hydrostatic pressure with areas of root resorption after application of a continuous torque moment. , 2007, The Angle orthodontist.

[22]  D. Zwanziger,et al.  A clinical evaluation of the differential force concept as applied to the edgewise bracket. , 1980, American journal of orthodontics.

[23]  Nabeel F Talic,et al.  Adverse effects of orthodontic treatment: A clinical perspective. , 2011, The Saudi dental journal.

[24]  J Middleton,et al.  An evaluation of the influence of orthodontic adhesive on the stresses generated in a bonded bracket finite element model. , 2001, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[25]  Oswaldo de Vasconcellos Vilella,et al.  Severe root resorption resulting from orthodontic treatment: Prevalence and risk factors , 2015, Dental press journal of orthodontics.

[26]  Hyo-Sang Park,et al.  Sliding mechanics with microscrew implant anchorage. , 2004, The Angle orthodontist.

[27]  D M Killiany,et al.  Root resorption caused by orthodontic treatment: an evidence-based review of literature. , 1999, Seminars in orthodontics.

[28]  Gang-Won Jang,et al.  Effective en-masse retraction design with orthodontic mini-implant anchorage: a finite element analysis. , 2010, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[29]  Yukio Kojima,et al.  Numerical simulation of canine retraction by sliding mechanics. , 2005, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[30]  R. Pryputniewicz,et al.  Holographic determination of centers of rotation produced by orthodontic forces. , 1980, American journal of orthodontics.

[31]  Donald J Rinchuse,et al.  Orthodontic appliance design. , 2007, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[32]  J Middleton,et al.  Three-dimensional analysis of orthodontic tooth movement. , 1990, Journal of biomedical engineering.

[33]  W. Bürgin,et al.  Perception of pain as a result of orthodontic treatment with fixed appliances. , 1996, European journal of orthodontics.

[34]  Martin Geiger,et al.  Numerical experiments on long-time orthodontic tooth movement. , 2002, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[35]  P. Gülkan,et al.  Endodontics: Additional studies on the distribution of stresses during vertical compaction of gutta-percha in the root canal , 1999, British Dental Journal.

[36]  Asim Ghouse Basha,et al.  Comparative Study Between Conventional En-Masse Retraction (Sliding Mechanics) and En-Masse Retraction Using Orthodontic Micro Implant , 2010, Implant dentistry.

[37]  Yukio Kojima,et al.  Numeric simulations of en-masse space closure with sliding mechanics. , 2010, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[38]  Naksoo Kim,et al.  Optimum conditions for parallel translation of maxillary anterior teeth under retraction force determined with the finite element method. , 2010, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[39]  O Malmgren,et al.  Early radiographic diagnosis of apical root resorption during orthodontic treatment: a study of maxillary incisors. , 1998, European journal of orthodontics.

[40]  C Bourauel,et al.  Determination of the centre of resistance in an upper human canine and idealized tooth model. , 1999, European journal of orthodontics.

[41]  J. Argüelles,et al.  Initial stress induced in periodontal tissue with diverse degrees of bone loss by an orthodontic force: tridimensional analysis by means of the finite element method. , 1993, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[42]  Ulrich Witzel,et al.  Inclusion of periodontal ligament fibres in mandibular finite element models leads to an increase in alveolar bone strains , 2017, PloS one.

[43]  Christoph Bourauel,et al.  Application of Bone Remodeling Theories in the Simulation of Orthodontic Tooth Movements , 2000, Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie.