Total knee arthroplasty (TKA) is usually the treatment of choice for severe osteoarthritis (OA) of the knee. Numerous clinical studies of TKA have shown high rates of long-term joint survival with good function [1]. Nevertheless, alternatives to this established procedure are being increasingly considered for several reasons. Postoperatively, patients frequently experience a slow rehabilitation and do not fully recover normal function [2]. Moreover, there is a growing pressure to reduce operating time while increasing the use of less invasive surgical techniques.

We began this study to investigate the feasibility of an Early Intervention (EI) device for medial OA, where we propose intervening at an early stage of the OA degenerative process. While there are other conservative treatments available, particularly unicompartmental arthroplasty (UKA), and more recently Conformis and Arthrosurface designs, our proposed design has certain unique characteristics.

In particular, the EI design...

References

References
1.
Attar
,
F.
,
Khaw
,
F.
,
Kirk
,
L.
, and
Gregg
,
P.
,
2008
, “
Survivorship Analysis at 15 Years of Cemented Press-Fit Condylar Total Knee Arthroplasty
,”
J. Arthroplasty
,
23
, pp.
344
349
.10.1016/j.arth.2007.02.012
2.
Noble
,
P.
,
Gordon
,
M.,
Weiss
,
J.,
Reddix
,
R.,
Conditt
,
M.,
and
Mathis
,
K.
,
2005
, “
Does Total Knee Replacement Restore Normal Knee Function?
Clin. Orthop. Relat. R.
,
431
, pp.
157
165
.10.1097/01.blo.0000150130.03519.fb
3.
Engh
,
G. A.
,
Dwyer
,
K. A.
, and
Hanes
,
C. K.
,
1992
, “
Polyethylene Wear of Metal-Backed Tibial Components in Total and Unicompartmental Knee Prostheses
,”
J. Bone Joint Surg.
,
74
, pp.
9
17
.
4.
Rho
,
J. Y.
,
Hobatho
,
M. C.
, and
Ashman
,
R. B.
,
1995
, “
Relations of Mechanical Properites to Density and CT Numbers in Human Bone
,”
Med. Eng. Phys.
,
17
(
5
), pp.
347
355
.10.1016/1350-4533(95)97314-F
5.
Shanbhag
,
A. S.
,
Hasselman
,
C. T.
, and
Rubash
,
H. E.
,
1996
, “
Technique for Generating Submicrometer Ultra High Molecular Weight Polyethylene Particles
,”
J. Ortho. Res.
,
14
, pp.
1000
1004
.10.1002/jor.1100140622
6.
Huang
,
H. C.
,
Liau
,
J. J.
,
Huang
,
C. H.
, and
Cheng
,
C. K.
,
2007
, “
Stress Analysis of the Anterior Tibial Post in Posterior Stabilized Knee Prostheses
,”
J. Ortho. Res.
,
10
, pp.
442
449
.10.1002/jor.20336
7.
Tandon
,
R.
,
1999
, “
Net Shaping of Co-Cr-Mo (F-75) Via Metal Injection Molding: Cobalt-Base Alloys for Biomedical Applications,” ASTM International
3–7.
8.
Rapperport
,
D. J.
,
Carter
,
D. R.
, and
Schurman
,
D. J.
,
1984
, “
Contact Finite Element Stress Analysis of Porous Ingrowth Acetabular Cup Implantation, Ingrowth, and Loosening
,”
J. Ortho. Res.
,
5
, pp.
548
561
.10.1002/jor.1100050410
9.
Huiskes
,
R.
,
Weinans
,
H
.,
Grootenboer
,
H. J.
,
Dalstra
,
M.
,
Fudala
,
B.
, and
Sloof
,
T. J.
,
1987
, “
Adaptive Bone-Remodeling Theory Applied to Prosthetic-Design Analysis
,”
J. Biomechanics
,
20
(
11
), pp.
1135
1150
.10.1016/0021-9290(87)90030-3
You do not currently have access to this content.