BIOLOGICALLY ACTIVE IMPLANTS
First Claim
1. A method for making an implant, comprising:
- preparing a dispersion of a polymer in an organic solvent;
applying the dispersion on a surface of the implant; and
evaporating the organic solvent.
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Abstract
This invention relates to an implant for treating pathological changes in the spinal column and/or locomotor system. According to one embodiment of the invention, the implant has a surface, a body, and an enamel-like or varnish-like coating that is up to 100 μm thick, comprises a biodegradable polymer such as polylactide which has a mean molecular weight of 100 kDa or less, forms an adhesive bond to the surface of the body such that when the implant is implanted, mechanical friction will not abrade or damage the coating, and is adapted to contact bone when implanted. This coating has an osteoinductive effect, which promotes the healing of fractures. Additional osteoinductive materials such as growth factors may be incorporated in the coating. The invention also relates to a method for producing such an implant using the following steps: preparing a dispersion of a biodegradable polymer in an organic solvent; applying the dispersion on the surface to be coated; and allowing the organic solvent to evaporate.
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Citations
26 Claims
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1. A method for making an implant, comprising:
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preparing a dispersion of a polymer in an organic solvent; applying the dispersion on a surface of the implant; and evaporating the organic solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for making an implant, comprising:
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preparing a dispersion of a polymer in an organic solvent; adding a pharmaceutically active agent to the dispersion; applying the dispersion on a surface of the implant; and evaporating the organic solvent in a closed space with a controlled gas atmosphere to regulate an evaporation rate of the organic solvent. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for making an implant, comprising:
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preparing a colloidal solution of a polymer in an organic solvent; adding an osteoinductive active agent to the colloidal solution; filtering the colloidal solution to refine a colloidal particle size; applying the colloidal solution on a surface of the implant; and evaporating the organic solvent in a closed space with a controlled gas atmosphere to regulate an evaporation rate of the organic solvent. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification