fa Application of a new viscoelastic finite element method model and analysis of miniscrew-supported hybrid hyrax treatment ارتودنسی Orthodontics پژوهشي Research <p> <strong>Introduction</strong></p><p>  In this study, we aimed to assess the ability of a new viscoelastic finite element method model to accurately simulate rapid palatal expansion with a miniscrew-supported hybrid hyrax appliance. </p><p> <strong>Methods </strong></p><p> A female patient received 3-dimensional craniofacial imaging with computed tomography at 2 times: before expansion and immediately after expansion, with the latter serving as a reference model for the analysis. A novel approach was applied to the finite element method model to improve simulation of the viscoelastic properties of osseous tissue. </p><p> <strong>Results</strong></p><p>  The resulting finite element method model was a suitable approximation of the clinical situation and adequately simulated the forced expansion of the midpalatal suture. Specifically, it demonstrated that the hybrid hyrax appliance delivered a force via the 2 mini-implants at the center of resistance of the nasomaxillary complex. </p><p> <strong>Conclusions </strong></p><p> The newly developed model provided a suitable simulation of the clinical effects of the hybrid hyrax appliance, which proved to be a suitable device for rapid palatal expansion. </p><hr><p></p><p> <strong>Source: </strong>American Journal of Orthodontics & Dentofacial Orthopedics </p><p> <a href="http://www.ajodo.org/article/S0889-5406(12)01167-5/abstract" target="_blank"><font color="#0000ff">Full Text</font></a></p> 0 0 http://idai.ir/browse.php?a_code=A-10-32-1762&slc_lang=fa&sid=1 Björn Ludwig 10031947532846008302 10031947532846008302 No Department of Orthodontics, University of Homburg/Saar, Homburg/Saar, Germany Sebastian Baumgaertel 10031947532846008303 10031947532846008303 Yes Department of Orthodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio Berna Zorkun 10031947532846008304 10031947532846008304 No Department of Orthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey Lars Bonitz 10031947532846008305 10031947532846008305 No Department of Cranial and Maxillofacial Surgery, University Witten/Herdecke, Witten, Germany Benitta Glasl 10031947532846008306 10031947532846008306 No Department of Orthodontics, University of Homburg/Saar, Homburg/Saar, Germany Benedict Wilmes 10031947532846008307 10031947532846008307 No Department of Orthodontics, University of Düsseldorf, Düsseldorf, Germany Jörg Lisson 10031947532846008308 10031947532846008308 No Department of Orthodontics, University of Homburg/Saar, Homburg/Saar, Germany