US 10,376,370 B2
Unicondylar meniscal bearing knee replacement
John William Goodfellow, Oxfordshire (GB); John O'Connor, Oxfordshire (GB); Chris Alexander Dodd, Oxfordshire (GB); and David Wycliffe Murray, Oxfordshire (GB)
Assigned to John Joseph O'Connor, Oxford (GB); David Wycliffe Murray, Oxford (GB); John Goodfellow, Oxford (GB); Chris Dodd, Oxford (GB); and Biomet UK Limited, Bridgend, South Glamorgan (GB)
Appl. No. 13/821,453
Filed by John William Goodfellow, Oxfordshire (GB); Colin Hunsley, Hants (GB); John O'Connor, Oxfordshire (GB); Chris Alexander Dodd, Oxfordshire (GB); and David Wycliffe Murray, Oxfordshire (GB)
PCT Filed Aug. 31, 2011, PCT No. PCT/GB2011/051633
§ 371(c)(1), (2), (4) Date Jun. 18, 2013,
PCT Pub. No. WO2012/032329, PCT Pub. Date Mar. 15, 2012.
Claims priority of provisional application 61/382,163, filed on Sep. 13, 2010.
Claims priority of application No. 1014824.5 (GB), filed on Sep. 7, 2010.
Prior Publication US 2013/0274888 A1, Oct. 17, 2013
Int. Cl. A61F 2/38 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/38 (2013.01) [A61F 2/3868 (2013.01); A61F 2002/30616 (2013.01); A61F 2002/3895 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A system of parts for use in unicondylar meniscal bearing knee replacement, the system comprising;
a plurality of meniscal bearings ranging in size including an extra small bearing having an anterior-posterior length of 29.2±0.5 mm, a small bearing, a medium bearing, a large bearing, and an extra large bearing having an anterior-posterior length of 39.5±0.5 mm, each meniscal bearing comprising a body defining a dished first bearing surface on one side thereof and a second surface on an opposing side thereof;
wherein each meniscal bearing has an entrapment defined as the difference in thickness between the smaller of the maximum thicknesses between the first and second surfaces at an anterior and posterior end and the minimum thickness between the first and second surfaces, the entrapment of each meniscal bearing being between 3.2 mm at least for the extra small bearing and 3.8 mm at most for the extra large bearing.