Bioimplant with evanescent coating film
To provide a bioimplant capable of controlling a rate of an antibacterial agent and an antibiotic to be eluted from the coating film. An evanescent coating film made of a calcium phosphate-based material having crystallinity of 10% to 90% is formed at a predetermined area of the bioimplant and an antibacterial agent or an antibiotic is contained in the coating film to suppress adhesion of bacteria.
1. A bioimplant, comprising:
an implant comprising a stem portion and a neck portion; and
an evanescent coating film comprising a calcium phosphate-based material formed on a first surface of the stem portion by thermal spraying,
wherein the evanescent coating film comprises a silver material distributed in the evanescent coating film, has a thickness in the range of 5 micrometers to 100 micrometers, and has a crystallinity in the range of 10% to 90% and
wherein an evanescence period of the evanescent coating film is configured to be a predetermined period in the range of 6 weeks to 120 months by selecting a combination of the thickness and the crystallinity of the evanescent coating film.
2. The bioimplant of claim 1 , wherein the evanescent coating film is not disposed on a surface of the neck portion.
3. The bioimplant of claim 2 , wherein the evanescent coating film does not cover a second surface of the stem portion, wherein the first and second surfaces laterally surround a portion of the stem.
4. The bioimplant of claim 1 , wherein the calcium phosphate-based material has a crystallinity of 60% to 90%.
5. The bioimplant of claim 1 , wherein a thickness of the evanescent coating film is in the range of 50 to 100 micrometers (μm).
6. The bioimplant of claim 1 , wherein the thickness of the evanescent coating film is in the range of 20 and 40 micrometers (μm).
7. The bioimplant of claim 1 , wherein an elution period of the silver material when the implant is placed in a body fluid is at least six months.
8. A bioimplant, comprising:
an implant comprising a metal or metal alloy material; and
an evanescent coating film comprising a calcium phosphate-based material formed on a first surface of the implant by thermal spraying,
wherein the evanescent coating film comprises silver metal particles distributed in the evanescent coating film, has a crystallinity in the range of 10% to 90%, and has a thickness in the range of 5 to 100 micrometers (μm), and
wherein an evanescence period of the evanescent coating film is configured to be a predetermined period in the range of 6 weeks to 120 months by selecting a combination of the thickness and the crystallinity of the evanescent coating film.
9. The bioimplant of claim 8 , wherein the thickness of the evanescent coating film is in the range of 20 and 40 micrometers (μm).
10. The bioimplant of claim 8 , wherein the implant comprises a stem portion and a neck portion, and the evanescent coating film is not disposed on a surface of the neck portion.
11. The bioimplant of claim 10 , wherein the implant comprises a stem portion and a neck portion, and the evanescent coating film does not cover a second surface of the stem portion, wherein the first and second surfaces laterally surround a portion of the stem.
12. The bioimplant of claim 8 , wherein the calcium phosphate-based material has a crystallinity of 60% to 90%.
13. The bioimplant of claim 8 , wherein an elution period of the silver metal particles when the implant is placed in a body fluid is at least six months.
14. A bioimplant, comprising:
an implant comprising a stem portion and a neck portion;
an evanescent coating film comprising a calcium phosphate-based material and a silver material formed on a first surface of the stem portion by thermal spraying; and
a shell configured to receive the neck portion therein, the shell comprising an upper hemispherical surface,
wherein the evanescent coating film covers the upper hemispherical surface,
wherein the calcium phosphate-based material has a crystallinity of 10% to 90%,
wherein the evanescent coating film has a thickness in the range of 5 and 100 micrometers (μm), and
wherein an evanescence period of the evanescent coating film is configured to be a predetermined period in the range of 6 weeks to 120 months by selecting a combination of the thickness and the crystallinity of the evanescent coating film.
15. The bioimplant of claim 14 , wherein the evanescent coating film is not disposed on a surface of the neck portion.
16. The bioimplant of claim 15 , wherein the evanescent coating film does not cover a second surface of the stem portion, wherein the first and second surfaces laterally surround a portion of the stem.
17. The bioimplant of claim 14 , wherein the thickness of the evanescent coating film is in the range of 20 and 40 micrometers (μm).
18. The bioimplant of claim 14 , wherein the calcium phosphate-based material has a crystallinity of 60% to 90%.