Abstract:
A surgical implant comprises a core region and a porous surface region extending over at least a part of said core region. The porous surface region has a predetermined pore volume fraction. A method of manufacturing a surgical implant in accordance with the invention comprises the steps of: (i) loading metallic powder having a predetermined particle size distribution around a pre-formed core in a sealable capsule; (ii) reducing pressure within said capsule to a predetermined pressure below atmospheric pressure; (iii) pressurising said capsule with a process gas to a predetermined pressure higher than the predetermined pressure of step (ii); (iv) sealing said capsule; (v) heating said pressurised sealed capsule at an elevated temperature and an elevated pressure for a predetermined time to produce an implant precursor; (vi) cooling said sealed capsule, and; (vii) heating said implant precursor for a predetermined time at an elevated temperature and a predetermined pressure below atmospheric pressure, whereby to generate porosity in said implant precursor.
Abstract:
A coating composition, a method for coating a surface of a material using the same, and surface treated materials having the same are provided. The coating composition comprises a nitrogen atom-containing organopolysiloxane represented by the average siloxane unit formula (1): (R 1 R 2 R 3 SiO 1/2 ) a (SiR 1 2 O 2/2 ) b (R 2 R 3 SiO 2/2 ) c (R 2 R 3 2 SiO 1/2 ) d (1) wherein R 1 is a nitrogen-free, substituted or unsubstituted, monovalent organic group of 1 to 20 carbon atoms, R 2 is a monovalent organic group containing at least one nitrogen atom, R 3 is an organoxy group represented by -OR 1 , "a" is a positive number of 0.7 to 1.3; "b" is a positive number of 2 to 500; "c" is a positive number of 0 to 10; "d" is a positive number 0.7 to 1.3: and a + d is at least 2.