Degradable ceramic filled porous ultra-short implant and preparation method thereof

Abstract

The invention discloses a degradable ceramic filled porous ultra-short implant which comprises a neck portion; a body portion is connected to the lower side of the neck portion and is formed by an outer body and an inner body; the outer body is of a mutually communicating porous structure; the porous structure is filled with degradable bone cement; the inner body is a solid dense portion and is provided with inside threads; the inside threads are in matching connection with a base station; the outer body is externally provided with outside threads; and porous thread ceramic bodies are filled between the adjacent outside threads. By adopting the degradable ceramic filled porous ultra-short implant disclosed by the invention, the equivalent elastic modulus of the ultrashort implant is well improved, and the phenomena of stress shielding and chronic fatigue are reduced; by filling the degradable bone cement, the integrity of the structure during implantation of the implant can be ensured,the success rate of implantation is increased, the implantation efficiency is improved, and tissue damages are reduced; and meanwhile, by filling the porous thread ceramic bodies between the adjacentoutside threads, degradable ceramics can be degraded after implantation, bone growth is induced, the degradable bone cement is degraded, the porous structure appears, and cell growth and body fluid exchange are facilitated.

Description

technical field [0001] The invention relates to the technical field of oral implants, in particular to a porous ultra-short implant filled with degradable ceramics and a preparation method thereof. Background technique [0002] Oral implants have gradually become the first choice for the treatment of edentulous patients. However, there are a large number of patients with insufficient alveolar bone height. At this time, only ultra-short implants with a length of 6 mm or less can be used. However, the existing ultra-short implants have the following problems: The ultra-short implant is short in length, it is difficult to form a tight holding force between the ultra-short implant and the bone, and it is difficult to form a tight combination with the bone tissue, and the risk of loosening is greater; at the same time, the ultra-short implant is composed of dense titanium alloy, and its The elastic modulus is much higher than the elastic modulus of bone. Stress concentration and ...

AI Technical Summary

Problems solved by technology

[0002] Oral implants have gradually become the first choice for the treatment of edentulous patients. However, there are a large number of patients with insufficient alveolar bone height. At this time, only ultra-short implants with a length of 6 mm or less can be used. However, the existing ultra-short implants have the following problems: The ultra-short implant is short in length, it is difficult to form a tight holding force between the ultra-short implant and the bone, and it is difficult to form a tight combination with the bone tissue, and the risk of loosening is greater; at the same time, the ultra-short implant is composed of dense titanium alloy, and its The elastic modulus is much higher than the elastic modulus of bone, and stress concentration and stress shielding effects are likely to occur at the interface between ultra-short implants and bone tissue. Bone interfaces are prone to chronic fatigue damage, which can easily lead to loosening, subsidence and dislocation of ultra-short implants.

[0003] The ultra-short implant is designed as a porous structure, and the porous ultra-short implant processed by additive manufacturing technology is conducive to solving the above problems. The porous structure is conducive to the growth of cells and bone ingrowth, and is conducive to the long-term stability of the ultra-short implant. , but the porous structure greatly weakens the strength of the ultra-short implant, which will destroy the thread structure of the ultra-short implant, and it is easy to break when screwed in, and the excessive stress during screwing in is likely to cause bone compression necrosis, damage the alveolar bone, and make it difficult to meet clinical needs

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