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Critical Reviews™ in Biomedical Engineering
SJR: 0.243 SNIP: 0.376 CiteScore™: 0.79

ISSN Imprimir: 0278-940X
ISSN On-line: 1943-619X

Volumes:
Volume 47, 2019 Volume 46, 2018 Volume 45, 2017 Volume 44, 2016 Volume 43, 2015 Volume 42, 2014 Volume 41, 2013 Volume 40, 2012 Volume 39, 2011 Volume 38, 2010 Volume 37, 2009 Volume 36, 2008 Volume 35, 2007 Volume 34, 2006 Volume 33, 2005 Volume 32, 2004 Volume 31, 2003 Volume 30, 2002 Volume 29, 2001 Volume 28, 2000 Volume 27, 1999 Volume 26, 1998 Volume 25, 1997 Volume 24, 1996 Volume 23, 1995

Critical Reviews™ in Biomedical Engineering

DOI: 10.1615/CritRevBiomedEng.v28.i12.60
pages 23-32

The Biomechanical and Surgical Solutions for Patella Implant in Total Knee Arthroplasty

David G. Mendes
The Center for Implant Surgery, Bnai Zion Medical Center, Haifa, Israel
Mazen Said
The Center for Implant Surgery, Bnai Zion Medical Center, Haifa, Israel
Sorin Head
The Center for Implant Surgery, Bnai Zion Medical Center, Haifa, Israel
Edmond Sabo
The Center for Implant Surgery, Bnai Zion Medical Center, Haifa, Israel
Ricardo Nachman
The Center for Implant Surgery, Bnai Zion Medical Center, Haifa, Israel
Jochanan H. Boss
The Center for Implant Surgery, Bnai Zion Medical Center, Haifa, Israel

RESUMO

A basic fault in designs of patella implants that calls for a prompt remedy is the inadequate polyethylene thickness in contact areas. The requirement for thickness of patella implants should be similar to the requirement set up by the FDA in 1993 regarding the tibial implants, that is, a minimal thickness of 8 mm.
A solution is presented for the optimal design of the patella implant and for the appropriate surgical technique.
The implant's undersurface that fixes to bone is concave and has a 1-cm wide but 5 to 6 mm short central peg that does not risk the integrity of the bone. Fixation of the concave aspect to the convex aspect of the bony patella strongly enhances resistance to medio-lateral and supero-inferior shear forces.
The circumferential facet of the implant 8 mm thick assures uniform thickness of the entire implant and assures optimal mechanical properties of the polyethylene.
The articulating surface is tailored to conform to the corresponding femoral trochlear groove and condyles. It can be made to fit any femoral component of any knee implant.


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