Magnitude of Force for Intrusion of Six Maxillary Anterior Teeth Using Mini-screw Anchorage: A Finite Element Study

Objectives: To evaluate the greatest magnitude of force that did not create the pressure in the periodontal ligament (PDL) exceeding the capillary hydrostatic pressure (0.0047 MPa) for the intrusion of six maxillary anterior teeth using two patterns of mini-screw anchorage, analyzed by the finite element method.

Methods: A finite element (FE) model of six maxillary anterior teeth with PDL and alveolar bone was constructed. In anchorage pattern 1, one mini-screw was placed between the central incisors with force applied to the arch wire between the central incisors towards the mini-screw. In anchorage pattern 2, used two mini-screws were placed between the lateral incisors and canines, left and right with force applied to the arch wire between the central and lateral incisors in an oblique direction towards the mini-screws. The pressure in PDL was analyzed.

Results: The greatest magnitude of force for the intrusion of six maxillary anterior teeth, that did not create the pressure in PDL exceeding the capillary hydrostatic pressure (0.0047 MPa) in anchorage pattern 1 was 16 g, and in anchorage pattern 2 was 47 g in total, or 23.5 g per each side. The greatest magnitude of force for the intrusion of the six maxillary anterior teeth in anchorage pattern 2 (47 g) was greater than that in anchorage pattern 1 (16 g). The greatest pressure area in anchorage pattern 1 was at the apex of the palatal side of PDL of the right central incisor, while the greatest pressure area in anchorage pattern 2 was at the apex of the palatal side of PDL of the right lateral incisor.

Conclusions: The greatest magnitude of force for the intrusion of the six maxillary anterior teeth that did not create the pressure in the periodontal ligament (PDL) exceeding the capillary hydrostatic pressure in anchorage pattern 1 was 16 g. In anchorage pattern 2, the greatest magnitude of force was 47 g in total or 23.5 g per each side.

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Sakdakornkul S, Patanaporn V, Rungsiyakull C. Magnitude of Force for Intrusion of Six Maxillary Anterior Teeth Using Mini-screw Anchorage: A Finite Element Study: Original articles. CM Dent J [Internet]. 2020 Jul 14 [cited 2024 Nov 01];41(2):89-100. Available from: https://www.dent.cmu.ac.th/cmdj/frontend/web/?r=site/viewarticle&id=56

Sakdakornkul, S., Patanaporn, V. & Rungsiyakull, C. (2020). Magnitude of Force for Intrusion of Six Maxillary Anterior Teeth Using Mini-screw Anchorage: A Finite Element Study. CM Dent J, 41(2), 89-100. Retrieved from: https://www.dent.cmu.ac.th/cmdj/frontend/web/?r=site/viewarticle&id=56

Sakdakornkul, S., Patanaporn Virush and Rungsiyakull Chaiy. 2020. "Magnitude of Force for Intrusion of Six Maxillary Anterior Teeth Using Mini-screw Anchorage: A Finite Element Study." CM Dent J, 41(2), 89-100. https://www.dent.cmu.ac.th/cmdj/frontend/web/?r=site/viewarticle&id=56

Sakdakornkul, S. et al. 2020. 'Magnitude of Force for Intrusion of Six Maxillary Anterior Teeth Using Mini-screw Anchorage: A Finite Element Study', CM Dent J, 41(2), 89-100. Retrieved from https://www.dent.cmu.ac.th/cmdj/frontend/web/?r=site/viewarticle&id=56

Sakdakornkul, S., Patanaporn, V. and Rungsiyakull, C. "Magnitude of Force for Intrusion of Six Maxillary Anterior Teeth Using Mini-screw Anchorage: A Finite Element Study", CM Dent J, vol.41, no. 2, pp. 89-100, Jul. 2020.

Sakdakornkul Suparat, Patanaporn Virush, Rungsiyakull Chaiy "Magnitude of Force for Intrusion of Six Maxillary Anterior Teeth Using Mini-screw Anchorage: A Finite Element Study." CM Dent J, vol.41, no. 2, Jul. 2020, pp. 89-100, https://www.dent.cmu.ac.th/cmdj/frontend/web/?r=site/viewarticle&id=56