Thai orthodontic elastomeric ligatures
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 lo...
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th-mahidol.10852023-04-12T15:33:52Z Thai orthodontic elastomeric ligatures ยางมัดจัดฟันอีลาสโตเมอร์ของไทย Thammanoon Boonyarangkul ธรรมนูญ บุญยรางกูร Niwat Anuwongnukroh นิวัต อนุวงศ์นุเคราะห์ Theeralaksna Suddhasthira ธีรลักษณ์ สุทธเสถียร Pasaree Laokijcharoen ภาสรี เล้ากิจเจริญ Surachai Dechkunakorn สุรชัย เดชคุณากร Surachai Dechkunakorn สุรชัย เดชคุณากร Mahidol University. Faculty of Dentistry. Department of Orthodontics Mahidol University. Faculty of Dentistry. Department of Maxillofacial Surgery Cytotoxic evaluation Initial extension force Orthodontic elastomeric ligatures Relaxation force ยางมัดจัดฟัน แรงยึดตั้งต้น แรงที่ลดลงตามระยะเวลา การประเมินความเป็นพิษต่อเซลล์ Open Access article วิทยาสารทันตแพทยศาสตร์มหิดล Mahidol Dental Journal 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. 2015-04-21T08:35:58Z 2017-01-05T06:57:14Z 2015-04-21T08:35:58Z 2017-01-05T06:57:14Z 2015-04-20 2010-09 Article Boonyarangkul T, Anuwongnukroh N, Suddhasthira T, Laokijcharoen P, Dechkunakorn S. Thai orthodontic elastomeric ligatures. M Dent J. 2010; 30(3): 141-51. 0125-5614 (printed) https://repository.li.mahidol.ac.th/handle/123456789/1085 eng Mahidol University Faculty of Dentistry Mahidol University application/pdf |
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Cytotoxic evaluation Initial extension force Orthodontic elastomeric ligatures Relaxation force ยางมัดจัดฟัน แรงยึดตั้งต้น แรงที่ลดลงตามระยะเวลา การประเมินความเป็นพิษต่อเซลล์ Open Access article วิทยาสารทันตแพทยศาสตร์มหิดล Mahidol Dental Journal |
spellingShingle |
Cytotoxic evaluation Initial extension force Orthodontic elastomeric ligatures Relaxation force ยางมัดจัดฟัน แรงยึดตั้งต้น แรงที่ลดลงตามระยะเวลา การประเมินความเป็นพิษต่อเซลล์ Open Access article วิทยาสารทันตแพทยศาสตร์มหิดล Mahidol Dental Journal Thammanoon Boonyarangkul ธรรมนูญ บุญยรางกูร Niwat Anuwongnukroh นิวัต อนุวงศ์นุเคราะห์ Theeralaksna Suddhasthira ธีรลักษณ์ สุทธเสถียร Pasaree Laokijcharoen ภาสรี เล้ากิจเจริญ Surachai Dechkunakorn สุรชัย เดชคุณากร Thai orthodontic elastomeric ligatures |
description |
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. |
author2 |
Surachai Dechkunakorn |
author_facet |
Surachai Dechkunakorn Thammanoon Boonyarangkul ธรรมนูญ บุญยรางกูร Niwat Anuwongnukroh นิวัต อนุวงศ์นุเคราะห์ Theeralaksna Suddhasthira ธีรลักษณ์ สุทธเสถียร Pasaree Laokijcharoen ภาสรี เล้ากิจเจริญ Surachai Dechkunakorn สุรชัย เดชคุณากร |
format |
Article |
author |
Thammanoon Boonyarangkul ธรรมนูญ บุญยรางกูร Niwat Anuwongnukroh นิวัต อนุวงศ์นุเคราะห์ Theeralaksna Suddhasthira ธีรลักษณ์ สุทธเสถียร Pasaree Laokijcharoen ภาสรี เล้ากิจเจริญ Surachai Dechkunakorn สุรชัย เดชคุณากร |
author_sort |
Thammanoon Boonyarangkul |
title |
Thai orthodontic elastomeric ligatures |
title_short |
Thai orthodontic elastomeric ligatures |
title_full |
Thai orthodontic elastomeric ligatures |
title_fullStr |
Thai orthodontic elastomeric ligatures |
title_full_unstemmed |
Thai orthodontic elastomeric ligatures |
title_sort |
thai orthodontic elastomeric ligatures |
publishDate |
2015 |
url |
https://repository.li.mahidol.ac.th/handle/123456789/1085 |
_version_ |
1781416158445961216 |