A novel low shrinkage and improved fracture toughness (LSIT) acrylate-based resin for 3D printing denture base

IF 4.5 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-09-12 DOI:10.1016/j.polymer.2025.129072

Ludan Qin , Tongtong Ma , Guanqi Liu , Yijiao Zhao , Qiuyi Li , Jiao Wen , Junling Wu , Jianmin Han

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引用次数: 0

Abstract

Objective

The application of digital light processing (DLP) printing denture base is limited by the photo-curing resin of poor accuracy and fracture. A novel resin with low polymerization shrinkage and improved toughness (named LSIT) was proposed to attack these issues.

Methods

The novel LSIT resin and commercial ASIGA Dentbase (AS) resin were prepared by DLP printing, and the conventional heat-polymerized (HP) resin was also fabricated. Physical properties, surface performance, and mechanical properties of the LSIT resin were compared to the AS and HP. Intaglio adaptation of the LSIT and AS denture base was also evaluated, and cell viability was assessed using a CCK-8 kit.

Results

The LSIT resin showed a lower polymerization shrinkage (6.70 ± 0.18 %) than the AS (8.23 ± 0.30 %). Compared to the HP and AS resins, it exhibited much more improved fracture toughness with higher maximum stress intensity factor (Kmax = 2.08 ± 0.30 MPa m^1/2) and total fracture work (Wt = 646.61 ± 129.61 J/m²). Its flexural strength and elastic modulus matched the ISO 20795–1:2013 standard, and were closed to the HP. Moreover, the LSIT denture bases at 45°-orientation showed acceptable intaglio adaptation, similar to the AS. No cytotoxicity was detected in any sample.

Conclusion

The LSIT resin exhibited lower printing viscosity, higher fracture toughness, and minimal volume shrinkage, offering admirable accuracy, especially at 45°-orientation.

Clinical significance

These findings suggested the LSIT resin as a promising solution for addressing polymerization shrinkage and brittleness in 3D printing denture base materials.

Abstract Image

查看原文本刊更多论文

一种新型低收缩率和提高断裂韧性（LSIT）的丙烯酸酯基树脂用于3D打印义齿基托

目的数字光处理（DLP）打印义齿基托的应用受到光固化树脂精度差和断裂的限制。为了解决这些问题，提出了一种具有低聚合收缩率和提高韧性的新型树脂（LSIT）。方法采用DLP打印法制备新型LSIT树脂和ASIGA牙基（AS）树脂，并制备常规热聚合（HP）树脂。将LSIT树脂的物理性能、表面性能和机械性能与AS和HP进行了比较。还评估了LSIT和AS义齿基托的凹痕适应性，并使用CCK-8试剂盒评估细胞活力。结果LSIT树脂的聚合收缩率（6.70±0.18%）低于AS树脂（8.23±0.30%）。与HP和AS树脂相比，它具有更高的最大应力强度因子（Kmax = 2.08±0.30 MPa m1/2）和总断裂功（Wt = 646.61±129.61 J/m2），具有更好的断裂韧性。其抗弯强度和弹性模量符合ISO 20795-1:2013标准，并接近HP。此外，LSIT义齿基托在45°取向时表现出良好的凹痕适应，与AS相似。所有样品均未检测到细胞毒性。结论LSIT树脂具有较低的打印粘度、较高的断裂韧性和较小的体积收缩率，具有良好的打印精度，特别是在45°取向下。研究结果表明，LSIT树脂是解决3D打印义齿基托材料聚合收缩和脆性问题的一种有前景的解决方案。

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.