Publication: Thai orthodontic elastomeric ligatures
Accepted Date
2010-12-24
Issued Date
2010-09
Resource Type
Language
eng
ISSN
0125-5614 (printed)
Rights
Mahidol University
Rights Holder(s)
Faculty of Dentistry Mahidol University
Bibliographic Citation
Boonyarangkul T, Anuwongnukroh N, Suddhasthira T, Laokijcharoen P, Dechkunakorn S. Thai orthodontic elastomeric ligatures. M Dent J. 2010; 30(3): 141-51.
Suggested Citation
Thammanoon Boonyarangkul, ธรรมนูญ บุญยรางกูร, Niwat Anuwongnukroh, นิวัต อนุวงศ์นุเคราะห์, Theeralaksna Suddhasthira, ธีรลักษณ์ สุทธเสถียร, Pasaree Laokijcharoen, ภาสรี เล้ากิจเจริญ, Surachai Dechkunakorn, สุรชัย เดชคุณากร Thai orthodontic elastomeric ligatures. Boonyarangkul T, Anuwongnukroh N, Suddhasthira T, Laokijcharoen P, Dechkunakorn S. Thai orthodontic elastomeric ligatures. M Dent J. 2010; 30(3): 141-51.. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/1085
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Organizational Units
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Title
Thai orthodontic elastomeric ligatures
Alternative Title(s)
ยางมัดจัดฟันอีลาสโตเมอร์ของไทย
Corresponding Author(s)
Abstract
Objective: To compare the in vitro properties of locally produced Thai
orthodontic elastomeric ligatures (Thai Ligature) with the imported brands
(Dynaflex, Unitek, Ormco and W&H).
Materials and Methods: Five brands of orthodontic elastomeric ligatures,
four commercially available and one locally made, were chosen in this
study. Three experiments were designed to measure and compare the
dimension, initial extension force, relaxation force and cytotoxicity according
to ISO 21606:2007 and ISO 10993-5:1999, the international standard
of elastomeric auxiliaries for use in orthodontics and cytotoxic evaluation of
dental materials. Property comparison among the five brands of orthodontic
elastomeric ligatures was done through the One-way ANOVA test (P<0.05).
Results: The results showed that the properties of Thai ligatures met the
standards. They had a significantly greater cross-section thickness and
inner diameter. The mean initial extension force measured at three times of
inner diameter was 2.004, 2.304, 2.535, 2.371 and 2.309 N for Dynaflex,
Unitek, Ormco, W&H and Thai ligature, respectively. Thai ligature and Unitek
were not significantly different in mean initial extension force. To measure
relaxation force, the percentage of force loss was determined. After
24 hours, the mean percentage of force loss was 27.38, 41.49, 48.35,
46.62 and 36.18 for Dynaflex, Unitek, Ormco, W&H and Thai ligature,
respectively. Regarding the percentage of force loss, the Thai produced
ligatures were the second best among all brands. Cytotoxic evaluation by
MTT assay showed that W&H had mild toxicity while the other four brands
had no toxicity.
Conclusion: This study showed that the Thai ligature can be a suitable
alternative orthodontic elastomeric ligature and presents opportunities for
further development.