Thermo-Mechanical Properties of Glass Fiber Reinforced Shape Memory Polyurethane for Orthodontic Application

Liu, Yunfeng; Wu, Jianlei; Song, Shuai; Xu, Lixin; Chen, Jie; Peng, Wei

doi:10.1007/s10856-018-6157-y

Cited by 21 publications

(12 citation statements)

References 47 publications

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“…Among several methods that can evaluate the shape recovery effect of materials, the bending test was chosen to qualitatively investigate and directly visualize the property 39 , 41 . A U-shaped model was prepared to standardize the case in which a tooth deviates from the line of occlusion to the buccal side and a bending force is applied to the aligners.…”

Section: Methodsmentioning

confidence: 99%

Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners

Lee

Kim

et al. 2022

Sci Rep

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To overcome the limitations of the conventional vacuum thermoforming manufacturing method, direct 3D printing of clear aligners has been developed. The present study investigated the thermo-mechanical and viscoelastic properties of a photocurable resin TC-85, which is a new material for the direct 3D printed clear aligners, comparing to a conventional thermoplastic material polyethylene terephthalate glycol. Dynamic mechanical analysis was performed to analyse the mechanical behaviours of the two materials at 37 °C and 80 °C, respectively. Furthermore, the shape memory property of the two materials was evaluated using a U-shape bending test, and the shape recovery ratio for 60 min at 37 °C was calculated. The results indicate that TC-85 can constantly apply a light force to the teeth when used for the 3D printed clear aligners, owing to its flexibility and viscoelastic properties. In addition, it is expected that the force decay induced by repeated insertion of the clear aligners will be reduced and a constant orthodontic force will be maintained. Furthermore, its geometric stability at high temperatures and the shape memory properties provide advantages for the clinical application.

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Section: Methodsmentioning

confidence: 99%

Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners

Lee

Kim

et al. 2022

Sci Rep

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“…They have also been a useful model for research in the field of orthodontics. Most recently, typodont models were used to test new bracket placement methods and new material for clear aligners [ 33 , 34 , 35 ]. Another study also used malocclusion typodont models to compare root movement measured by cone-beam computed tomography and consecutive digital scans [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Magnet Position on Tipping and Bodily Tooth Movement in Magnetic Force-Driven Orthodontics

et al. 2020

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The goal of our study is to launch magnetic force-driven orthodontics. This continuous study investigated the influence of magnet position on tipping and bodily tooth movement, using 3D printing technology and digital analysis. Orthodontic typodont models (TMs) for space-closure were 3D printed to mimic maxillary central incisors. Nd-Fe-B magnets were placed in the middle third (Model-M), and the cervical third (Model-C), of the tooth. TMs, before and after movement, were digitally scanned and superimposed. The 3D digital coordinates (X, Y, and Z axes), and rotations (yaw, pitch, and roll) of the tooth crown and root, were calculated and compared between the two magnet position settings. Model-M showed higher rates of movement, but more rotation than Model-C (p < 0.01). The root apex of Model-M moved in the opposite direction of the crown (R = −0.29), indicating tipping movement. In contrast, the crown and root apex moved in the same direction (R = 0.56) in Model-C, indicating bodily movement. These patterns were confirmed in a typodont model of a moderate crowding case. The results validated that modifying the magnet position increased the amount of bodily tooth movement, and decreased rotation/tipping in an ex vivo setting.

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“…The SMP archwires could supply sufficient contraction force and were more aesthetically pleasing than metallic ones. Since then, various orthodontic archwires made of SMPs were reported (Jung and Cho, 2010;Liu et al, 2017Liu et al, , 2018. For instance, Liu et al (2017) used SMPU as orthodontic archwire on a wax model for a tooth-moving simulation.…”

Section: Orthodontic Archwiresmentioning

confidence: 99%

“…After incorporating 30 wt% short glass fibres into SMPU, the recovery force of the archwire was enhanced by 96%. For a tooth-moving simulation performed on identical typodont models, the dentition aligning time was decreased by 50% (Liu et al, 2018).…”

Section: Orthodontic Archwiresmentioning

confidence: 99%

Programmable polymers with shape memory for biomedical applications

et al. 2023

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Shape memory polymers (SMPs) are a type of programmable materials capable of transforming their shapes in a pre-programmed way upon the application of an external stimulus. These materials have been tested for various potential applications particularly in the biomedical field for polymers with general and specific requirements. This review focuses on the recent advances in biomedical applications, including self-tightening sutures, pressure bandages, self-expansion stents, tissue engineering scaffolds, artificial muscles, drug delivery, and orthodontic archwires, after a brief description of the concepts, classifications, programming procedures, and material requirements of SMPs.

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Thermo-Mechanical Properties of Glass Fiber Reinforced Shape Memory Polyurethane for Orthodontic Application

Cited by 21 publications

References 47 publications

Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners

Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners

Effect of Magnet Position on Tipping and Bodily Tooth Movement in Magnetic Force-Driven Orthodontics

Programmable polymers with shape memory for biomedical applications

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