Assessment of different direct printed aligner resins for leaching of urethane dimethacrylate: an in vivo study

Title (English)

Assessment of different direct printed aligner resins for leaching of urethane dimethacrylate: an in vivo study

Thong tin bai bao / Article info

• Tac gia / Authors: Aswathi Selvaraj, Deepak Prabhu, Balaji Krishnan, Parameswaran TM, Mahalakshmi Krishnakumaran, Mohan Kumar
• Tap chi / Journal: The Angle Orthodontist
• Ngay xuat ban / Published: 2026-05-21
• DOI: 10.2319/092225-788.1
• Nguon / Source: OpenAlex

Abstract (English)

ABSTRACT Objectives To evaluate the release of urethane dimethacrylate (UDMA) from the direct printed aligners using Tera Harz TC-85 resin (Graphy, Seoul, Korea) and Clear A resin (Senertek, Türkiye) in saliva samples at different time intervals. Materials and Methods This prospective quasiexperimental study included 2 groups: Group A Tera Harz TC-85 (Graphy, Seoul, Korea) and Group B Clear A resin (Senertek, Izmir, Türkiye), each with 13 participants. Patients wore aligners for more than 20 hours a day for 14 days. Whole saliva samples were obtained at several time intervals: T0 before aligners were inserted and T1, T2, and T3 after 24 hours, 7 days, and 14 days of usage, respectively. High-performance liquid chromatography was used to analyze the samples, and the average results were computed. Results Results showed significant variations in UDMA leaching between groups A and B at all postintervention periods. Group B had a significantly greater mean UDMA release than Group A at T1, T2, and T3. Intragroup analysis revealed time-dependent increases in UDMA release in both groups. Conclusions The findings revealed significant differences in UDMA release rates between the two materials, with Tera Harz TC-85 consistently showing lower levels of leaching than Clear A resin over the 14-day study period. Tera Harz TC-85 has superior performance in minimizing UDMA leaching, while both materials maintained acceptable profiles under the study conditions.

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Bai dang tu dong boi plugin Ortho OA Fetcher. Anh (neu co) tu PubMed Central. Noi dung lay tu nguon open access va dich tu dong – chi mang tinh tham khao.