This paper presented a new method of shape analysis of hip joint. The bony surfaces of 12 male hipbone specimens and 26 female hipbone specimens were scanned using a 3D laser scanner. After performing local and global morphology analyses on the acetabulum surface, a rotation ellipsoid CAD model was applied to fit the acetabulum surface, and then an optimization technique was used to find the geometric parameters of the model. This study compared the fitting error between the sphere and rotation ellipsoid. The result is that the fitting error of rotation ellipsoid is smaller than the sphere, and the rotation ellipsoid can describe the shape of the acetabulum better. This shape likely decreases the cases of hip joint subluxation compared to a ball and socket joint.

Issue Section:
Technical Papers
Keywords:
Total Hip Joint Replacement, Reverse Engineering, Optimization Method
Topics:
Fittings, Rotation, Shapes, Errors, Modeling
1.
Harris
,
W. H.
,
1995
, “
The Problem is Osteolysis
,”
Clin. Orthop.
,
311
(
1
), pp.
46
–
53
.
2.
Viceconti
,
M.
,
Zannoni
,
C.
,
Testi
,
D.
, and
Cappello
,
A.
,
1999
, “
CT Data Sets Surface Extraction for Biomechanical Modeling of Long Bones
,”
Comput. Methods Programs Biomed.
,
59
(
3
), pp.
159
–
166
.
3.
George
,
K. K.
, and
Rasha
,
A. N.
,
2001
, “
Adaptive Reconstruction of Bone Geometry From Serial Cross-Sections
,”
Artif. Intell. Eng.
,
15
(
3
), pp.
227
–
239
.
4.
Werner
,
A.
,
Lechniak
,
Z.
,
Skalski
,
K.
, and
Kei^dzior
,
K.
,
2000
, “
Design and Manufacture of Anatomical Hip Joint Endoprostheses Using CAD/CAM Systems
,”
J. Mater. Process. Technol.
,
107
(
1–3
), pp.
181
–
186
.
5.
Wu
,
J. S.
,
Ling
,
L.
, and
Wang
,
C. T.
, 1998, “Method of Extracting Femur Contour in the CAD/CAM System of the Custom Artificial Hip Joint,” Mechenical Design and Research (Chinese), 15(4), pp. 53–55.
6.
Xue
,
W. D.
, and
Dai
,
K. R.
, 1999, “The Measurement of the Geometric Parameters of the Hip Joint,” Journal of Medical Biomechanics (Chinese), 14(4), pp. 243–248.
7.
Dai
,
K. R.
,
Yuan
,
J. X.
,
Sun
,
Y. H.
et al., 1993, “An Anatomical Study of Calcar Femorale and Its Clinical Significance,” Journal of Shanghai Second Medical University, 7(1), pp. 40–45.
8.
Tompson
,
M. S.
,
Tompson
,
M. S.
et al.,
2000
, “
Acetabular Morphology and Resurfaceing Design
,”
J. Biomech.
,
33
(
12
), pp.
1645
–
1653
.
9.
Menschik
,
F.
,
1997
, “
The Hip Joint as a Conchoids Shape
,”
J. Biomech.
,
30
(
9
), pp.
971
–
973
.
10.
Greenward
,
A. S.
, and
O’Connor
,
J. J.
,
1971
, “
The Transmission of Load Through the Human Hip Joint
,”
J. Biomech.
,
4
, pp.
507
–
528
.
11.
Eckstein
,
F.
,
von Eisenhart-Rothe
,
R.
,
Landgraf
,
J.
et al.,
1997
, “
Quantitative Analysis of Incongruity, Contact Areas and Cartilage Thinckness in the Human Hip Joint
,”
Acta Anat. (Basel)
,
158
, pp.
192
–
204
.
12.
Leardini
,
A.
, and
Cappozzo
,
A.
,
1999
, “
Validation of a Functional Method for the Estimation of Hip Joint Center Location
,”
J. Biomech.
,
32
(
1
), pp.
99
–
103
.
13.
Oblonsek
,
C.
, and
Guid
,
N.
,
1998
, “
A Fast Surface-Based Procedure for Object Reconstruction From 3D Scattered Points
,”
Comput. Vis. Image Underst.
,
69
(
2
), pp.
185
–
195
.
14.
Sun
,
W.
,
Bradley
,
C.
,
Zhang
,
Y. F.
et al.,
2001
, “
Cloud Data Modeling Employing a Unified, Non-Redundant Triangular Mesh
,”
Comput.-Aided Des.
,
33
(
2
), pp.
183
–
193
.
15.
Meek
,
D. S.
, and
Walton
,
D. J.
,
2000
, “
On Surface Normal and Gaussian Curvature Approximations Given Data Sampled From a Smooth Surface
,”
Comput. Aided Geom. Des.
,
17
(
6
), pp.
521
–
543
.
16.
Douros, I., and Buxton, B., 2002, “Three-Dimensional Surface Curvature Estimation Using Quadric Surface Patches,” Scanning 2002 Proceedings, Paris.
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