Kusum Pallavi, Sharma Shantanu, Jha Sovendu
Department of Dentistry (Orthodontics and Dentofacial Orthopaedics), Nims Dental College and Hospital, Nims University, Jaipur, Rajasthan, India.
Department of Orthodontics and Dentofacial Orthopaedics, Nims Dental College and Hospital, Nims University, Jaipur, Rajasthan, India.
J Pharm Bioallied Sci. 2025 Jun;17(Suppl 2):S1616-S1618. doi: 10.4103/jpbs.jpbs_189_25. Epub 2025 Jun 18.
Thermoplastic polymers are extensively used in the fabrication of clear aligners due to their biocompatibility, flexibility, and mechanical properties. Evaluating the mechanical performance of these materials under clinical conditions is crucial for optimizing their application.
Two types of thermoplastic polymers, Duran and Zendura, were selected for analysis. Specimens with uniform dimensions (10 mm × 50 mm × 1 mm) were prepared from sheets of each material. Tensile strength, elastic modulus, and flexural strength were measured using a universal testing machine (UTM) under controlled conditions. Cyclic loading tests were conducted to simulate intraoral forces over 1000 cycles at 37°C in an artificial saliva solution. Data were statistically analyzed using one-way ANOVA with a significance level of < 0.05.
Zendura exhibited higher tensile strength (average: 62 ± 3 MPa) and elastic modulus (average: 2400 ± 100 MPa) compared to Duran (tensile strength: 55 ± 2 MPa; elastic modulus: 2100 ± 90 MPa). Similarly, Zendura showed superior flexural strength. Cyclic loading tests revealed that Zendura retained 96% of its original mechanical properties after 1000 cycles, while Duran retained 93%.
Zendura outperformed Duran in tensile strength, elastic modulus, and flexural strength, making it a highly suitable material for aligner fabrication. However, Duran demonstrated satisfactory flexibility and durability, which may provide specific clinical advantages.
热塑性聚合物因其生物相容性、柔韧性和机械性能而广泛应用于透明矫治器的制造。在临床条件下评估这些材料的机械性能对于优化其应用至关重要。
选择两种热塑性聚合物Duran和Zendura进行分析。从每种材料的片材制备尺寸均匀（10毫米×50毫米×1毫米）的试样。在受控条件下使用万能试验机（UTM）测量拉伸强度、弹性模量和弯曲强度。进行循环加载试验，以在37°C的人工唾液溶液中模拟超过1000次循环的口腔内力。使用单因素方差分析对数据进行统计分析，显著性水平<0.05。
与Duran（拉伸强度：55±2兆帕；弹性模量：2100±90兆帕）相比，Zendura表现出更高的拉伸强度（平均值：62±3兆帕）和弹性模量（平均值：2400±100兆帕）。同样，Zendura显示出更好的弯曲强度。循环加载试验表明，Zendura在1000次循环后保留了其原始机械性能的96%，而Duran保留了93%。
Zendura在拉伸强度、弹性模量和弯曲强度方面优于Duran，使其成为矫治器制造的高度合适材料。然而，Duran表现出令人满意的柔韧性和耐用性，这可能提供特定的临床优势。
