Three-dimensional distribution of articular cartilage thickness in the elderly cadaveric acetabulum: a new method using three-dimensional digitizer and.

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Three-dimensional distribution of articular cartilage thickness in the elderly cadaveric acetabulum: a new method using three-dimensional digitizer and CT K. Akiyama, T. Sakai, J. Koyanagi, T. Murase, H. Yoshikawa, K. Sugamoto Osteoarthritis and Cartilage Volume 18, Issue 6, Pages 795-802 (June 2010) DOI: 10.1016/j.joca.2010.03.007 Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 (a) The digitizing apparatus used for 3D morphological analysis. (b) All specimens were fixed such that the articular surfaces faced upwards. Osteoarthritis and Cartilage 2010 18, 795-802DOI: (10.1016/j.joca.2010.03.007) Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Surface models of a left hemipelvis. (a) Surface model obtained using the 3D-digitizer, showing the acetabular cartilage surface model. (b) Surface model obtained from 3D-CT in the same specimen, showing the acetabular bone surface model. (c) Registration of the two models by surface registration of the steel spheres. The black line indicates sectioning of the acetabulum. (d) Cross-section along the line shown in (c). The inferred cartilage is colored pink. Osteoarthritis and Cartilage 2010 18, 795-802DOI: (10.1016/j.joca.2010.03.007) Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 3D distribution of acetabular articular cartilage thickness of the acetabulum shown in Fig. 2, using the proximity mapping method. The color scale is in millimeters (A, anterior; P, posterior). Osteoarthritis and Cartilage 2010 18, 795-802DOI: (10.1016/j.joca.2010.03.007) Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

Fig. 4 Anatomic cartilage thickness of a femoral head as viewed by stereomicroscope. Cartilage thickness was measured from the cartilage surface to the chondro-osseous junction using a digital template. Measurements were taken five times at each measuring point, and then averaged. The scale indicates 1mm. Osteoarthritis and Cartilage 2010 18, 795-802DOI: (10.1016/j.joca.2010.03.007) Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

Fig. 5 (a) Cross-section of the surface model of a femoral head made by 3D-digitizer and 3D-CT, showing inferred cartilage thickness. (b) Anatomic counterpart section. Osteoarthritis and Cartilage 2010 18, 795-802DOI: (10.1016/j.joca.2010.03.007) Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

Fig. 6 Acetabular cartilage thickness in each region. The number in each category scale indicates the number of specimens. The color scale is in millimeters (AM, anteromedial; AL, anterolateral; SM, superomedial; SL, superolateral; PM, posteromedial; PL, posterolateral). Osteoarthritis and Cartilage 2010 18, 795-802DOI: (10.1016/j.joca.2010.03.007) Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions