Dental composite-resin high-strength fiber periodontal bundle band and preparation method thereof

Abstract

The invention relates to a dental composite-resin high-strength fiber periodontal bundle band, which is prepared by the following steps of adopting poly p-phenylene benzobisoxazole (PBO) reinforced fibers subjected to surface modification and micromorphology treatment as a reinforcement phase, adopting toughened resin subjected to nano-modification as a matrix, and mixing the PBO reinforced fibers and the toughened resin to form a composite material so as to prepare the periodontal bundle band. According to the dental composite-resin high-strength fiber periodontal bundle band provided by the invention, the problems that an existing periodontal fiber bundle band is insufficient in bending strength, modulus of elasticity in static bending, toughness and other mechanical properties are solved, and the high-performance PBO fiber and a three-dimensional braided structure are introduced into a periodontal bundle band material, so that the overall mechanical strength of the fiber bundle band is improved.

Description

technical field [0001] The invention relates to a composite resin high-strength fiber periodontal band for dentistry and a preparation method thereof, in particular to a poly-p-phenylenebenzobisoxazole (PBO) fiber for a dental periodontal band Reinforced composite materials and methods for their preparation. Background technique [0002] Periodontal disease is a frequently-occurring disease of the oral cavity, and the prevalence rate of periodontal disease in my country is higher than that of dental caries. Periodontal disease is a chronic progressive destructive disease of periodontal tissue, and one of its main clinical symptoms is tooth loosening. The loose teeth and the healthy teeth are connected and fixed together by the periodontal band, forming a new chewing unit to disperse the occlusal force, reduce the load on the periodontal tissue, give the affected tooth a physiological rest, and heal the damaged periodontal tissue Repair to create favorable conditions, so th...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many materials available for loose tooth fixation, but all of them have shortcomings: stainless steel wire combined with composite resin band: poor aesthetics, tooth preparation is required, but the mechanical properties of metal wire and flowable resin are poor, and the two The materials cannot form a chemical bond, and shear force often occurs between the interfaces, resulting in stress concentration, resulting in partial or even complete shedding of the composite resin, breaking the ligature wire, and loosening of the teeth again, resulting in failure of the treatment; Good performance, but weak fixation strength, only suitable for temporary fixation; fiber band: can be chemically combined with resin, has better aesthetics and biocompatibility, but the existing fiber bending strength, bending modulus of elasticity, The mechanical properties such as toughness are still insufficient, and it is still insufficient for patients with large occlusal force and narrow dental arch shape, which also leads to restoration failure

Although the performance of PBO fiber itself is excellent, the surface of PBO fiber is smooth, and the polarity of the fiber surface is also very small, which makes it difficult for the fiber to infiltrate with the resin, resulting in poor interfacial performance between the fiber and the resin matrix, and low interfacial shear strength. The transmission of force affects the comprehensive performance of composite materials and limits the application of PBO fibers in the field of advanced composite materials