A porous ultra-short implant filled with degradable ceramics and its preparation method

Abstract

A porous ultra-short implant filled with degradable ceramics, including a neck. Degradable bone cement, the inner body is a solid and dense part, the inner body is provided with internal threads, the internal threads are connected with the abutment, the outer body is provided with external threads, and the outer threads are filled with porous threaded ceramic bodies; the invention is very good Improve the equivalent elastic modulus of ultra-short implants, reduce stress shielding and chronic fatigue, and fill with degradable bone cement to ensure the integrity of the implant structure, increase the success rate and efficiency of implantation, and reduce tissue damage ; At the same time, the porous threaded ceramic body is filled between the external threads. After implantation, the degradable ceramics degrade, induce bone growth, degrade the degradable bone cement, and the porous structure appears, which is beneficial to cell growth and body fluid exchange.

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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