Acetabulum prosthesis capable of being tightly cooperated

Abstract

The invention discloses an acetabulum prosthesis capable of being tightly cooperated. The acetabulum prosthesis consists of an outer cup and a lining, wherein an elastic clip structure and an embedding structure are arranged between the outer cup and the lining to prevent the lining from falling out, a possibility that the outer cup and the lining generate final motion is overcome, the cooperationstability of the acetabulum prosthesis is improved, and a renovation risk is greatly lowered.

Description

technical field [0001] The invention relates to an acetabular prosthesis, in particular to a tightly fitted acetabular prosthesis. Background technique [0002] The fit stability between the inner cup and the inner liner of the acetabular prosthesis is of great significance for the initial and long-term stability of the acetabulum. At present, most manufacturers adopt figure 1 In the prior art, an annular groove 11 is provided on the cone of the outer cup to fix the inner liner and prevent the inner liner from falling out. The adverse effect is that the annular groove 11 is opened in the cone of the outer cup, which destroys the integrity of the cone of the outer cup, weakens its anti-deformation performance, and increases the risk of renovation. At the same time, the contact surface between the inner lining and the cone of the outer cup is reduced. , There may be looseness between the two, affecting the strength of the fit. [0003] In the prior art as mentioned above, s...

AI Technical Summary

Problems solved by technology

The adverse effect is that the annular groove 11 is opened in the cone of the outer cup, which destroys the integrity of the cone of the outer cup, weakens its anti-deformation performance, and increases the risk of renovation. At the same time, the contact surface between the inner lining and the cone of the outer cup is reduced. , there may be looseness between the two, affecting the strength of the fit

[0003] In the prior art as mentioned above, such as figure 1 As shown, when the outer cup and the inner liner reach the contact point 12 in the initial loading state, there is a certain gap between the end surface 13 of the outer cup and the insertion joint surface 14 of the inner liner, so that the groove 108 provided by the outer cup cannot be used for the inner liner. The protrusion 203 of the liner provides a guiding function, and when the liner is inserted into the outer cup through the instantaneous press-fit force, the radial alignment position of the two may be shifted, resulting in micro-movement of the liner in the outer cup and affecting the acetabulum overall stability of the prosthesis

Images