Anchorage preservation in canine retraction: an energy analysis using finite element method
Publish place: Iranian Journal of Orthodontics، Vol: 3، Issue: 3
Publish Year: 1387
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ORTHO-3-3_006
تاریخ نمایه سازی: 5 شهریور 1402
Abstract:
Aim: Canine retraction is an important part of orthodontic treatments and should be coincided with preservation of posterior anchorage, The strain energy input of different appliance designs in teeth PDL is assessed.Materials and methods: Eight ۳D finite element (FE) models of upper right maxillary molars and second premolar were designed. The models contained teeth, their PDL, and bone with their attachments. Combinations of wire cross scetion(round and rectangular), force application on the first or second molar, including or excluding the second molar, and adding the second molar to the system via ligature wire is considered in different models. The strain energy input to the PDL of different teeth was evaluated.Results: Engagement of all teeth, force application to the second molar resulted in ۰.۰۰۰۱۷۱۲۹ mJ and shifting toward applying force to the first molar resulted in ۰.۰۰۰۱۷۳۹۸ mJ. When the second molar was free from wire but laced; this energy finding was ۰.۰۰۰۱۴۴۹۹ mJ which increase to ۰.۰۰۰۳۹۹۱ mJ when the second molar was really out of the system. Findings for the rectangular wire were ۰.۰۰۰۰۰۰۸۴, ۰.۰۰۰۰۰۱۱۴۸, ۰,۰۰۰۱۰۲۶, and ۰.۰۰۰۲۹۲۹ respectively.Conclusion: Rotation prevention of the second molar is the key point in using its anchorage value.
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Authors
Allahyar Geramy
Professor, Orthodontic Department, TUMS, Dental Research Center (DRC-TUMS)
Amir Hooman Sadr haghighi
Assistant professor, Orthodontic Department, Tabriz Dental School
Seyed Amir Reza Fatahi Meybodi
Assistant professor, Orthodontic Department, Shahid Sadooghi Dental School, Yazd
Hasan Salehi
Orthodontist