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Material Influence on Retention Characteristics of Orthodontic Aligners-A Systematic Review
Deepankar Bhatnagar1, Swapna Sreenivasagan2, Stela Kapoor1
1Department of Orthodontics and Dentofacial Orthopaedics, MM College of Dental Sciences and Research, Maharishi Markandeshwar (Deemed to be University) Mullana, Ambala, Haryana, India.
Orthodontics & Craniofacial Research
|December 13, 2025
Summary
Clear aligner material properties significantly impact retention efficacy. High-modulus materials like TC-85 and BENQ PET provide superior performance for effective tooth movement in clear aligner therapy.
Area of Science:
- Orthodontics
- Biomaterials Science
Background:
- Clear aligners are a popular orthodontic treatment choice, especially for adults, due to their aesthetic appeal and convenience.
- Understanding factors influencing aligner retention is crucial for treatment success.
Purpose of the Study:
- To systematically review the effect of different clear aligner materials on aligner retention.
- To identify material properties that enhance aligner fit, adaptation, and resistance to dislodgement.
Main Methods:
- Systematic literature search up to March 2025 across LILACS, Cochrane, and MEDLINE (PubMed).
- Inclusion of peer-reviewed clinical studies (RCTs, cohort, case-control).
- Data extraction and risk of bias assessment by four independent reviewers using the JBI tool.
Main Results:
- Six studies were selected from 343 initial articles.
- Aligner retention is primarily determined by material properties like modulus of elasticity, fatigue resistance, and structural behavior, not solely thickness.
- High-modulus materials (e.g., TC-85, BENQ PET) demonstrate superior retention and force control.
Conclusions:
- Material properties are key determinants of clear aligner retention.
- High-modulus materials offer enhanced performance for complex orthodontic treatments with clear aligners.
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