Dental restoration thread fiber pole

Abstract

The invention relates to a dental restoration thread fiber pole which is characterized by comprising a head part, a middle section and a tail part, wherein the head part is provided with an oblique spiral groove, the tail part is a cone-shaped part, the shape and the size of the tail part are consistent with the shape and the size of a cone-shaped part of a dental drill bit, the cone-shaped part of the middle section near the tail part is provided with a groove, and a smooth straight section is arranged between the groove and the oblique spiral groove of the head part. A dental restoration thread pole core is an integer and is formed once, and physical locking force of the dental restoration thread pole core and a light-cured resin core is increased by the designed oblique spiral groove so as to increase interface strength. The dental restoration thread fiber pole reduces restoration failure caused by debonding the pole core in clinical application, but also has better transfer stress with the core, thereby avoiding the dental post break caused by stress concentration. The dental restoration thread fiber pole can be finely processed by a machine tool, has simple method, small errors and high consistency and can be produced in a large scale.

Description

technical field [0001] The invention relates to a threaded pile for dental restoration, in particular to a threaded pile processed and formed by fiber reinforced composite materials. Background technique [0002] With the continuous development of modern root canal treatment technology and the continuous improvement of dental materials, a large number of teeth with severe tooth defects have been preserved. Post-core restoration technology is an important means to preserve the affected teeth and restore their functions. The post-core is a prosthesis used to improve the resistance and retention of the affected tooth. It consists of two parts, the post and the core. The post is cemented in the root canal to achieve retention, and the core restores the shape of the defective tooth, providing further support for the affected tooth. Create conditions for artificial crown restoration or as an abutment for denture restoration. [0003] The core post repair technology of tooth defec...

AI Technical Summary

Problems solved by technology

Therefore, the following three problems are likely to occur when using the existing dental post and light-cured resin core: (1) the restoration failure caused by debonding of the post and core in clinical application occurs, and the chemical interface bonding force between the post and the core is relatively small , when the stress is transferred, stress concentration is likely to cause delamination or debonding between the pile and the core, resulting in repair failure

(2) The core made of composite light-curing resin is applied to the high-strength composite material post. Due to the large difference in mechanical properties, it only depends on the strength of the chemical interface between the resin matrix of the fiber-reinforced composite material and the light-curing pile-shaped resin. Lower, increasing the possibility of nuclear damage due to external force

(3) In addition, in clinical application, the bonding strength of the chemical interface between the fiber post and the dentin formed by the light-cured adhesive between the straight fiber post and the dentin is low, and it will also occur. The possibility of repair failure such as debonding, displacement or even pulling out

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