07780738 is referenced by 8 patents and cites 163 patents.

A ceramic-metal composite articulation is provided with substantial elimination of wear debris, wherein a ceramic material is provided with superior mechanical properties tailored for articulating with ceramic articulations having high flexural strength (greater than about 700 MPa), high fracture toughness (greater than about 7 MPam1/2) and a high Weibull modulus (greater than about 20), in comparison with presently available bio-ceramics such as alumina or zirconia. The mechanical property enhancement enables ceramic materials with greater reliability and significantly reduced in-vivo fracture risk to be obtained. Preliminary in-vitro wear performance, to several million cycles using established test protocols, of head/cup components in a prosthetic hip joint made from these ceramics also demonstrates the ultra low wear characteristics. These material properties substantially eliminate polyethylene (PE) wear debris mediated implant failures by offering an optimal combination of bio-mechanical safety and reliability with ultra low wear performance.

Title
Polymer-ceramic articulation
Application Number
11/20424
Publication Number
7780738 (B2)
Application Date
December 21, 2004
Publication Date
August 24, 2010
Inventor
Ramaswamy Lakshminarayanan
Salt Lake City
UT, US
Aaron A Hofmann
Salt Lake City
UT, US
Ashok C Khandkar
Salt Lake City
UT, US
Agent
Mintz Levin Cohn Ferris Glovsky & Popeo P C
Assignee
Amedica Corporation
UT, US
IPC
A61F 2/42
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