Artificial joint stem and method for manufacturing artificial joint stem
AssigneesSaga University, KYOCERA Corporation
InventorsMasaaki Mawatari, Iwao Noda
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Abstract
In the present disclosure, an artificial joint stem includes a base and a coating film located on the base. The base includes a first region, a second region, and a third region located in sequence. The coating film contains a calcium phosphate-based material and an antimicrobial material. The coating film is located across the first region and the second region, and the third region is exposed from the coating film. The surface of the coating film located in the first region has a larger surface roughness than the surface of the base in the third region.
Claims17
An artificial joint stem comprising:
- a base comprising a first region, a second region, and a third region located in sequence;
- a layered member;
- and
- a coating film located on the base, the coating film containing a calcium phosphate-based material and an antimicrobial material, wherein
- the coating film is located across the first region and the second region,
- the third region is exposed from the coating film,
- a surface roughness of a surface of the coating film in the first region is larger than a surface roughness of a surface of the base in the third region,
- the layered member is disposed on the first region and comprises an edge having a lower height than a height of an inner portion of the layered member.
An artificial joint stem comprising:
- a base comprising a first region, a second region, and a third region located in sequence;
- and
- a coating film located on the base, the coating film containing a calcium phosphate-based material and an antimicrobial material, wherein
- the coating film is located across the first region and the second region,
- the third region is exposed from the coating film,
- a surface roughness of a surface of the coating film in the first region is larger than a surface roughness of a surface of the base in the third region,
- the coating film located in the second region comprises an end portion and a base portion, the base portion being located closer to the first region than the end portion is to the first region, and
- a thickness of the base portion is larger than a thickness of the end portion.
A method for manufacturing an artificial joint stem, the method comprising:
- a first surface roughening step of forming a rough surface on a first region of a base, the base comprising the first region, a second region, and a third region located in sequence;
- and
- a coating film forming step of forming a coating film on the rough surface and the base such that the coating film extends across the first region and the second region wherein the third region is exposed, and the coating film contains a calcium phosphate-based material and an antimicrobial material, wherein
- the coating film forming step comprises disposing a second protective material on the base such that a part of the second region and the third region are protected by the second protective material while the first region and an other part of the second region are exposed, and forming the coating film on the rough surface of the first region that is exposed and the other part of the second region that is exposed.
Dependencies are inferred from the claim text.