Ceramic composite material for high-flexibility artificial skeleton joint and preparation method

Abstract

The invention discloses a ceramic composite material for a high-flexibility artificial skeleton joint and a preparation method. Raw materials are formed by the following components by mass percentage:30-40% of hydroxyapatite, 30-40% of zirconia-toughened aluminum oxide powder or yttria-stabilized zirconia powder, 5-10% of ceramic whisker, 5-10% of nano titanium oxide, 0-10% of oyster shell powder, 0-10% of magnesium oxide, and 0-10% of calcium oxide; the zirconia-toughened aluminum oxide powder is prepared from 60-70wt% of aluminum oxide and 30-40wt% of zirconium oxide, and is prepared by preparing mixed gel through a coprecipitation method, and spray-drying; the yttria-stabilized zirconia powder is prepared from 97wt% of the zirconium oxide and 3wt% of yttrium oxide. The prepared artificial skeleton joint ceramic composite material has good biocompatibility and flexibility, good shock resistance, and good heat stability and corrosion resistance, wherein the bending strength can reach1250-1400 MPa, the breaking tenacity can reach 16.5-17.5 MPa / m<2>, and the compressive strength reaches 750-900 HV; the material can prepare an artificial skeleton or a joint instead of a metal or ceramic.

Description

technical field [0001] The invention relates to the technical field of ceramic composites for artificial bone joints, in particular to a highly flexible ceramic composite material for artificial bone joints and a preparation method. Background technique [0002] With the aggravation of the aging population and the increase of joint damage caused by various injuries, it often leads to changes in the joint structure. Medication alone can only partially relieve pain symptoms, and it is difficult to improve joint function. Artificial joint replacement can achieve the purpose of relieving pain, stabilizing joints, correcting deformities, and improving joint function. Such as pain caused by rheumatoid arthritis, old joint dislocation, etc., through artificial joint surgery, joint deformities can be significantly corrected, and the original stiff joints can return to normal functions. Joint pain and severe dysfunction caused by many diseases are suitable for artificial joint repla...

AI Technical Summary

Problems solved by technology

[0003] However, the artificial joint prosthesis currently used clinically is mostly made of metal or ceramics. Metal or ceramic joints have low biocompatibility in the human body. The joints rely on the stress conduction generated by the impact to achieve movement and stimulate bone growth. If metal joints are used, it is prone to "stress shielding" and cannot be conducted. Over time, the bones in the joints are easy to "dissolve" and shrink due to lack of stimulation

In addition, metal joints also have hidden dangers such as heavy metal ion allergy, metal corrosion, polyethylene wear, imaging interference, and early revision.

Although ceramic bone joints have high hardness, they have no flexibility and have poor impact resistance. Once broken, the powder will be embedded in muscle tissue, causing secondary damage.