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A Finite Element Analysis for Mandibular Whole Arch Distalization According to Different Lengths of Retraction Hooks |
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| รหัสดีโอไอ | |
| Creator | Virush Patanaporn |
| Title | A Finite Element Analysis for Mandibular Whole Arch Distalization According to Different Lengths of Retraction Hooks |
| Contributor | Theerachai Piansirirat, Chaiy Rungsiyakul |
| Publisher | Faculty of Dentistry, Chiang Mai University |
| Publication Year | 2565 |
| Journal Title | Chiang Mai Dental Journal |
| Journal Vol. | 43 |
| Journal No. | 3 |
| Page no. | 42-52 |
| Keyword | distalization, finite element, mandibular whole arch, retraction hooks |
| URL Website | http://www.dent.cmu.ac.th/cmdj/frontend/web/?r=site/index |
| Website title | Chiang Mai Dental Journal |
| ISSN | 2773-921X |
| Abstract | Objectives: To compare the differences in displacement patterns and stress distribution in the periodontal ligament of whole mandibular dentition between distalization force vectors corresponding to retraction hooks of different lengths.Methods: A cone beam computed tomography image of one 18-year-old female patient with Class III malocclusion was used to construct a finite element model. To simulate the whole arch distalization mechanics, a force of 200 g was applied to the miniscrews in the lower jaw using 1-, 3-, 6-, 9- and 12-mm retraction hooks. The displacement patterns of the teeth and the stress distribution in the periodontal ligament were analyzed on the x-, y-, and z-axes.Results: At the retraction hook length of 6 mm, the incisors showed approximate bodily movement, the premolars showed slight extrusion, and the second molars showed slight intrusion. The von Mises stress in almost distalization patterns was highly distributed in the periodontal ligament of the teeth adjacent to the retraction hooks, especially when using hooks longer than 3 mm.Conclusions: The 6-mm retraction hooks, used in conjunction with miniscrews on the mandibular buccal shelf area, caused mandibular dentition to move along the occlusal plane with minimal undesirable movement. The stress was highly distributed in the periodontal ligament of the teeth adjacent to the retraction hooks when hook length longer than 3 mm. |
