Mechanical asymmetry during articulation of tibial and femoral cartilages: local and overall compressive and shear deformation and properties.
During knee movement, femoral cartilage articulates against cartilage from the tibial plateau, and the resulting mechanical behavior is yet to be fully characterized. The objectives of this study were to determine (1) the overall and depth-varying axial and shear strains and (2) the associated moduli, of femoral and tibial cartilages during the compression and shearing of apposing tibial and femoral samples. Osteochondral blocks from human femoral condyles (FCs) characterized as normal and donor-matched lateral tibial plateau (TP) were apposed, compressed 13%, and subjected to relative lateral motion. When surfaces began to slide, axial (-E(zz)) and shear (E(xz)) strains and compressive (E) and shear (G) moduli, overall and as a function of depth, were determined for femoral and tibial cartilages. Tibial -E(zz) was approximately 2-fold greater than FC -E(zz) near the surface (0.38 versus 0.22) and overall (0.16 versus 0.07). Near the surface, E(xz) of TP was 8-fold higher than that of FC (0.41 versus 0.05), while overall E(xz) was 4-fold higher (0.09 versus 0.02). For TP and FC, -E(zz) and E(xz) were greatest near the surface and decreased monotonically with depth. E for FC was 1.7-fold greater than TP, both near the surface (0.40 versus 0.24MPa) and overall (0.76 versus 0.47MPa). Similarly, G was 7-fold greater for FC (0.22MPa) than TP near the surface (0.03MPa) and 3-fold higher for FC (0.38MPa) than TP (0.13MPa) overall. These results indicate that tibial cartilage deforms and strains more axially and in shear than the apposing femoral cartilage during tibial-femoral articulation, reflecting their respective moduli.
Wong
Benjamin L
BL
Department of Bioengineering, Mail Code 0412, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0412, USA.
Sah
Robert L
RL
D016880:Anisotropy; D002102:Cadaver; D002358:Cartilage, Articular / Q000502:physiology*; D019245:Compressive Strength / Q000502:physiology; D055119:Elastic Modulus / Q000502:physiology; D005269:Femur / Q000502:physiology*; D006244:Hardness / Q000502:physiology; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology*; D033081:Shear Strength / Q000502:physiology; D013977:Tibia / Q000502:physiology*
Arthritis Rheum. 2003 Dec;48(12):3382-94
14673990
J Orthop Res. 1991 May;9(3):330-40
2010837
J Bone Joint Surg Am. 2009 Jan;91(1):167-75
19122092
J Orthop Res. 1987;5(4):497-508
3681524
J Biomech. 2008;41(6):1333-40
18329650
Mol Cell Biomech. 2008 Sep;5(3):197-206
18751528
Med Sci Sports Exerc. 2005 Nov;37(11):1948-56
16286866
J Biomech Eng. 2002 Oct;124(5):557-67
12405599
J Anat. 2006 Apr;208(4):491-512
16637874
Arthritis Rheum. 2006 Jun;54(6):1888-96
16729294
J Biomech. 2004 Aug;37(8):1251-61
15212931
Proc Inst Mech Eng H. 2003;217(3):215-9
12807162
Osteoarthritis Cartilage. 2007 Jan;15(1):35-47
16859933
Clin Orthop Relat Res. 1980 Mar-Apr;(147):287-95
6154558
J Biomed Mater Res. 1999;48(4):482-7
10421691
Arch Biochem Biophys. 2001 Nov 1;395(1):41-8
11673864
Osteoarthritis Cartilage. 2005 Oct;13(10):925-34
16154364
J Orthop Res. 2005 Nov;23(6):1390-8
15972257
J Orthop Res. 1989;7(1):43-9
2908911
Histochemie. 1965 Oct 1;5(3):221-33
4223499
Ann Biomed Eng. 1996 Jul-Aug;24(4):500-12
8841725
J Orthop Res. 1989;7(5):619-36
2760736
J Orthop Res. 1997 Jul;15(4):499-506
9379258
J Biomech. 1994 Nov;27(11):1347-60
7798285
J Biomech. 2008 Aug 7;41(11):2430-7
18619596
Arthritis Rheum. 2008 Jul;58(7):2065-74
18576324
Osteoarthritis Cartilage. 2002 May;10(5):360-9
12027537
J Orthop Res. 1994 Jul;12(4):451-63
8064477
J Biomed Mater Res. 1999;48(2):99-107
10331900
J Orthop Res. 1993 Nov;11(6):771-81
8283321