Assessment the thermoforming effect on the physical and mechanical properties of different thermoplastic orthodontic retainers: An in vitro study.

Q2 Dentistry
Journal of Orthodontic Science Pub Date : 2024-11-25 eCollection Date: 2024-01-01 DOI:10.4103/jos.jos_61_24
Doaa N Hamid, Mustafa M Al-Khatieeb
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引用次数: 0

Abstract

Objectives: As patients are instructed to wear thermoplastic retainers for the rest of their lives, the durability of the materials is a critical factor in evaluating whether the expense is justified. This study examined the physical and mechanical properties of three different thermoplastic retainer materials before and after thermoforming (BT and AT).

Materials and methods: Clear Advantage Series I, Clear Advantage Series II, and Leone types were used, with each material having a thickness of 1 mm. The materials' tensile force, hardness, and water absorption tests have been measured for 90 thermoformed and 90 non-thermoformed specimens (30 specimens from each material).

Results: The tensile force, hardness, and water absorption values of all the materials differed significantly (P ≤ 0.05) BT. Additionally, the majority of the materials showed significant differences in water absorption, hardness, and tensile force (P ≤ 0.05) AT, except the Leone materials, and Clear Advantage Series I did not significantly differ in the case of hardness value. All studied materials showed an increase in hardness and water absorption AT (P ≤ 0.05). At the same time, all of the studied materials showed a significant decrease in tensile force after thermoforming.

Conclusion: Thermoforming increases the material's water absorption while decreasing its stiffness, affecting its mechanical and physical properties. Clear Advantage Series II (PP) stood out with superior flexibility, wear resistance, and minimal water absorption compared to other materials, highlighting its durability and superiority.

热成型对不同热塑性正畸固位体物理力学性能影响的体外研究。
目的:由于患者被要求终生佩戴热塑性固位器,因此材料的耐用性是评估费用是否合理的关键因素。本研究考察了三种不同热塑性固位材料在热成型前后(BT和AT)的物理和机械性能。材料和方法:使用Clear Advantage系列I、Clear Advantage系列II和Leone系列,每种材料的厚度为1mm。对90个热成型和90个非热成型试样(每种材料各30个试样)进行了材料的拉伸力、硬度和吸水性测试。结果:所有材料的吸水性、硬度、吸水率均有显著性差异(P≤0.05),除Leone材料和Clear Advantage系列1在硬度值上无显著性差异外,其余材料的吸水性、硬度、吸水率均有显著性差异(P≤0.05)。所有材料的硬度和吸水率均有提高(P≤0.05)。同时,所有材料在热成型后的拉伸力都有明显的降低。结论:热成型增加了材料的吸水性,降低了材料的刚度,影响了材料的力学和物理性能。Clear Advantage系列II (PP)与其他材料相比,具有优越的柔韧性,耐磨性和最小的吸水率,突出了其耐用性和优越性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Orthodontic Science
Journal of Orthodontic Science Dentistry-Orthodontics
CiteScore
0.90
自引率
0.00%
发文量
46
审稿时长
19 weeks
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