What Are Dental Resin Materials?

Epoxy resin can show many excellent properties when used as a dental resin matrix, so that patients can have a better experience during use. Epoxy resin is a general term for polymer compounds with two or more epoxy rings in the molecular chain and aliphatic, alicyclic or aromatic as the main chain. Epoxy resin has excellent mechanical properties, strong adhesion, high corrosion resistance, strong plasticity, good electrical insulation and excellent thermal stability, so it is not only widely used in the dental field, but also in many fields such as electronic materials, anti-corrosion coatings and adhesives. In the field of dental applications, epoxy resin is often used for tooth restoration, root canal sealing and orthodontic brackets. As a substitute for traditional alloy materials, epoxy resin has strong operability, better biocompatibility with tooth structure, and elastic coefficient similar to that of teeth. At the same time, epoxy resin is very close to the shape and color of native teeth when repairing teeth.

Resin-based restorative materials are widely used in various direct and indirect repair processes. Generally, the resin matrix is ​​an important component that determines the mechanical properties of the overall material. Resin-based dental materials need to have fluidity or moldability before curing and be able to provide sufficient mechanical strength after curing. Depending on the specific usage characteristics, the resin matrix used is also different. Among them, methacrylate resin is also a commonly used resin matrix. The following are common resin matrices of this type. Bisphenol A glycidyl methacrylate (Bis-GMA) is the earliest resin matrix used in the dental field and is also one of the most common resin matrices. Bis-GMA is composed of bisphenol A (BPA) and glycidyl methacrylate. The steric hindrance of the monomer chain around the benzene ring structure and the presence of hydroxyl groups make Bis-GMA have high viscosity and low hydrophobicity. At the same time, it has a high degree of intermolecular bonding and high bending strength. Bis-GMA has low diffusivity in tissues, which makes it very low in toxicity. However, Bis-GMA has a high viscosity. In order to solve the problem of high viscosity of Bis-GMA, triethanol dimethacrylate (TEGDMA) is usually used with it. Because the interchain polar bond interaction of TEGDMA is weak, the main chain structure is relatively flexible, and the viscosity is low, it is often used as a diluent. Therefore, the two are mixed in different proportions to achieve the required use parameters.

Dental resin composites are used for dental restoration treatment and need to face different oral environments. The restoration will cause stress and deformation to healthy teeth. Therefore, it is necessary to reduce damage to surrounding teeth. This requires that the restoration site is well combined with the original teeth and the material has good plasticity. The load force generated by chewing will cause strain and stress in the restoration, which is related to factors such as the geometry of the material. It is necessary to understand the mechanical strength such as bending strength and modulus in advance, which is usually determined by a three-point bending test to measure whether its performance can be used for dental restoration.

 

Material application examples

 

 

precision parts processing

Dental Casting Resin

Dental Casting Resin

dental grade resin

Dental resin composites are composed of resin matrix and additives. Materials prepared with different components have different lifespans, biocompatibility and water absorption, which affect the restoration effect. To develop new dental materials, it is necessary to optimize the comprehensive performance, prevent physical failure and recurrence of dental caries, evaluate from multiple aspects, and use modification methods to improve mechanical strength, biocompatibility and water absorption.