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Assessing biomechanical aging of aligners produced by different thermoformed machine using 3d scanner -An invivo study

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Original Article

Author Details : Priyanka Selvaraj*, Ramya Rajendran, K.S. Sumithra Devi, Sruthi Jeevagan, Mora Sathi Rami Reddy

Volume : 10, Issue : 4, Year : 2024

Article Page : 250-255

https://doi.org/10.18231/j.ijodr.2024.044

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Abstract

Introduction: Clear aligner therapy(CAT) ses a variety of appliances with different applications to different malocclusion therapies and differing modes of action and construction methods. While clear aligner therapy seems very easy to use, but any kind of aligner system needs to go through a rigorous laboratory process to get the desired results. With the help of CAT Therapy products, a variety of malocclusions have been effectively treated. Clear aligners are still frequently made using the thermoforming process, despite the range of 3D Printed clear aligner systems that are currently on the market. However, orthodontists need to be aware of the materials' post-process mechanical and chemical properties because the thermoforming process significantly affects the aligners' mechanical and chemical properties. Thus, the goal of my research is to compare the adaptation and marginal thickness of aligners produced using various thermoforming machines both before and after intraoral exposure.
Aim: Aim of this study is to compare the thickness, adaptability, and marginal fit of orthodontic aligners made by various thermoformed machines.
Materials and Methods: The sample size was determined using G power software, which showed that the sample size of six patients divided into four groups had a 95% power of statistical testing. 3 consecutive patients, three women(mean age ± SD 26.0 ± 10.2 years) and three men(mean age ± SD 26.0 ± 9.0 years) per group made up the study sample,Statistical analysis: The statistical analysis used was paired t-tests for comparison between the groups. A one-way ANOVA test was used to calculate the mean difference among the four groups. The p-value <0> Results: Both the thermoforming machines can used to fabricate aligners that are equally good in terms of thickness considering the manufacturing recommendation. However, Aligner fabricated using Ministar thermoforming machine(Group A) with 1 mm thickness sheets shows that Mild changes thickness throughout the aligners in incisor and canine and molar regions and Druformat with shows uniformly distributed(group B) thickness in incisor, canine and molar region. between intra group comparison group shows mild changes after intraoral exposure. but the values within clinical tolerance level.
Conclusion : Two distinct thermoforming machines were used to fabricate the passive aligners, and the overall dimensional accuracy at each of the teeth was within clinical tolerances. However, location-specific deviations that may affect clinical utility may not always be represented by the overall deviations.

Keywords: Clear aligners, Polyethylene Terephthalate glycol-modified (PET-G), Aligner thickness

How to cite : Selvaraj P, Rajendran R, Devi K S, Jeevagan S, Reddy M S R, Assessing biomechanical aging of aligners produced by different thermoformed machine using 3d scanner -An invivo study. IP Indian J Orthod Dentofacial Res 2024;10(4):250-255

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