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Effect of low temperature plasma treatment on bond strength of fiber piles

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23 Apr,2021

Influence of low temperature plasma treatment on bond strength of fiber piles:

With the continuous improvement of people's living standard and the attention to oral health, more and more attention has been paid to the repair of crown and root injuries. As a country with a large population, China has many patients with tooth defects. During repair, repair materials with sufficient deformation resistance and certain binding strength are required.

Fiber piles treated by low temperature plasma

At present, there are many materials used for dental repair. Dentists can choose the specific repair materials suitable for patients according to the characteristics of patients. Due to the advantages of corrosion resistance, good biocompatibility, good aesthetics and simple clinical operation, the hard resin base pad after restoration has good mechanical distribution, accord with the normal physiological structure, and has a good protective effect on the remaining tooth tissue, thus reducing the possibility of root fracture after restoration to a certain extent.

The clinical application and popularization of fiber piles have attracted the attention of many scholars because of their excellent biocompatibility, biomechanical properties and corrosion resistance. The success of fiber post restoration mainly depends on the bond strength of fiber post - cement - dentin composite interlayer. Since the 1990s, fiber piles have become an effective method to repair residual roots and crowns.

Due to the smooth surface of fiber pile, it is difficult to combine with resin cement effectively, resulting in insufficient bond strength and often difficult to achieve satisfactory clinical effect. Physical or chemical treatment can increase the bonding strength of the fiber pile surface. Sandblasting and silane coupling agents are commonly used in clinical practice. However, these methods are often accompanied by some adverse reactions, such as the integrity of the fiber column corrosion, performance reduction. The low temperature plasma treatment on the surface of the fiber column can improve the bonding strength without changing the physical and chemical properties of the raw materials.

CRF-plasma

In clinical practice, the use of fiber post prosthesis can achieve good clinical effect. However, reports of failed fiber pile restoration are not uncommon. Due to the insufficient bond strength of the repair material, it brings serious troubles to the patients and even affects their quality of life. Retention effect of fiber post is an important factor affecting the effect of dental restoration.

The bond strength of fiber pile is mainly determined by the interface between resin cement and dentin and the interface between fiber pile and resin cement. Inadequate bonding strength is a common cause of repair failure. The fiber on the surface of the fiber pile is smooth and smooth, and it is difficult to produce with resin material. Resin is a polymer crosslinked polymer material, it is difficult to carry out chemical bonding. In order to improve the bond strength of fiber piles, researchers have done a lot of work, among which the effective technology is plasma surface treatment.

After plasma treatment, the mechanical activity of epoxy resin on the surface of fiber pile was improved. After plasma treatment at low temperature, the chemical affinity between the surface of polymer material and the adhesive material of acrylic resin can be increased without damaging the fiber integrity of the surface. Compared with other surface treatment methods, low-temperature plasma treatment is relatively mild, does not cause serious damage to the original physical and chemical structure and properties of the surface, and significantly increases the bonding strength.

The surface of the fiber pile was bombarded with plasma, and the results showed that the bonding strength was improved obviously. By introducing oxygen-containing groups on the surface of fiber piles, the chemical bonding effect on the surface of fiber piles can be increased, and the chemical reactions on the surface active components such as oxygen free radicals and resin materials can be made, thus the bonding strength of fiber piles can be improved.

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