Resorbable ceramic compositions

A surface coated device or substrate, comprising:

• a device or substrate selected from the group consisting of an artificial orthopedic device, a spinal implant, a joint implant, an attachment element, a bone nail, a bone screw, and a bone reinforcement plate;
• and
• a coating on a surface of the device or substrate, the coating being at least one of:
• (i) non-cured ceramic material comprising:
• at least one silicate with Ca as the main cation with a resorption rate less or equal to that of bone in-growth rate, the at least one silicate being the main binding phase in a cured material;
• at least one second binding phase based on phosphates and/or sulphates in an amount of less than 20 weight-% of the main binding phase, the at least one second binding phase comprising a soluble glass;
• and
• optionally, additives selected from the group consisting of an inert phase, additives that make a cured material radiopaque, and mixtures thereof, wherein,
• the at least one Ca-silicate is present in an amount of greater than 50 weight-% of the ceramic material;
• and
• (ii) a cured chemically bonded ceramic material comprising:
• a main binding phase comprising at least one silicate with Ca as a main cation with a resorption rate less or equal to that of bone in-growth rate;
• at least one second phase based on phosphates and/or sulphates in an amount of less than 20 weight-% of the main binding phase, the at least one phase comprising soluble glass;
• and
• optionally, additives selected from the group consisting of an inert phase, additives that make the material radiopaque, and mixtures thereof, wherein,
• the at least one Ca-silicate is present in an amount more than 50 weight-% of the cured ceramic material.