Characterization of dental light-curing resin composites incorporating multiple modified low-shrink monomers

IF 4.6 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Dental Materials Pub Date : 2024-06-12 DOI:10.1016/j.dental.2024.05.031

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Abstract

Objective

Polymerization shrinkage poses a significant challenge in dental resin composites. The objective of this study is to introduce spiroorthocarbonate monomer 3,9-dimethylene-1,3,5,7-tetraoxa-spiro[5,5]undecane (BMSOC) and epoxy resin monomer 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate (ECHM-ECHC) into bisphenol-S-bis(3-methacrylato-2-hydroxy propyl)ether (BisS-GMA) based resin composites to develop composites with reduced shrinkage properties.

Methods

BMSOC and BisS-GMA were synthesized and thoroughly mixed with ECHM-ECHC, followed by inorganic fillers and photoinitiators. Based on the composition of the resin matrix, five groups of experimental composites were prepared, with traditional bisphenol A-dimethacrylate glycidyl ester (Bis-GMA)/triethylene glycol dimethacrylate (TEGDMA) based composite serving as the control. The polymerization properties, including degree of conversion (DC) and polymerization shrinkage (PS), as well as marginal microleakage, wettability, flexural strength (FS), flexural modulus (FM), and biocompatibility were evaluated.

Results

The results demonstrated that compared with the control group, the PS of BisS-GMA based composites containing BMSOC and ECHM-ECHC were significantly reduced (P < 0.05), and the lowest PS (0.96 ± 0.08 %) was observed when the ratio of BisS-GMA: (Epoxy + BMSOC) was 4:6. Additionally, the experimental composites also exhibited improved DC, minimal microleakage, low hydrophilicity, enhanced mechanical properties, qualified in vivo biocompatibility, and slight/moderate in vitro biocompatibility.

Significance

The resin composites incorporating multiple modified low-shrink monomers are promising for dental applications to prevent various clinical problems caused by PS and extend restoration longevity.

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含有多种改性低收缩单体的牙科光固化树脂复合材料的特性。

目的：聚合收缩是牙科树脂复合材料面临的一项重大挑战。本研究的目的是将螺碳酸酯单体 3,9-二亚甲基-1,3,5,7-四氧杂螺[5,5]十一烷（BMSOC）和环氧树脂单体 3,4-环氧环己基甲基-3、4-epoxycyclohexane carboxylate (ECHM-ECHC)加入双酚-S-双（3-甲基丙烯酰氧基-2-羟基丙基）醚（BisS-GMA）基树脂复合材料中，以开发收缩性能更低的复合材料。方法：合成 BMSOC 和 BisS-GMA，并将其与 ECHM-ECHC 充分混合，然后加入无机填料和光引发剂。根据树脂基体的组成，制备了五组实验复合材料，以传统的双酚 A-二甲基丙烯酸缩水甘油酯（Bis-GMA）/三乙二醇二甲基丙烯酸酯（TEGDMA）为基础的复合材料作为对照。评估了聚合性能，包括转化率（DC）和聚合收缩率（PS），以及边缘微渗漏、润湿性、弯曲强度（FS）、弯曲模量（FM）和生物相容性：结果表明，与对照组相比，含有 BMSOC 和 ECHM-ECHC 的基于 BisS-GMA 的复合材料的 PS 显著降低（P<0.05）：含有多种改性低收缩单体的树脂复合材料具有良好的牙科应用前景，可预防 PS 引起的各种临床问题，延长修复体的使用寿命。

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.