Matching of orthopedic plates and bony surfaces does not have a high certainty of success because bone anatomy differs among individuals. Considering that surfaces of both orthopedic plates and bones manifest themselves as freeform surfaces and are especially suitable for surface feature-based design, a novel surface feature-based method for designing orthopedic plates is put forward, with detailed steps as follows. First, the bone surface feature (BSF) is established through feature representation of an average bone surface model, obtained based on the investigated samples. Second, the abutted surface of an orthopedic plate is established directly based on the BSF surface to increase matching between the plate and bony surface. The abutted surface feature (ASF) is then established through feature representation of the abutted surface. Third, the hierarchical mapping relationship between BSF and ASF is setup based on the framework of “three-level parameters and two-grade mappings.” The result is that semantic parameters defined on BSF and ASF are separated as an operation interface to make it convenient to edit orthopedic plates according to bone sizes. Finally, the orthopedic plate is generated by thickening the abutted surface, which is generated based on parameters defined on BSF. Taking radius as an example, a group of volar plates suitable for distal radius with different sizes are generated, showing that the proposed method is valid and feasible. Meanwhile, biomechanical stresses of designed volar plates are analyzed with finite element analysis, and the result shows that designed volar plates have good structural strength.

References

References
1.
Pei
,
G.
,
2009
,
Digital Orthopaedics
,
People's Medical Publishing House
,
Beijing, China
, pp.
304
389
.
2.
Yin
,
Q.
,
Zhang
,
Y.
,
Wang
,
C.
,
Xia
,
H.
, and
Fang
,
L.
,
2011
,
Clinical Digital Orthopedics: The Innovation of Theoretical System and Clinical Application
,
People's Military Medical Press
,
Beijing, China
, pp.
1
5
.
3.
Ren
,
L. T.
,
Zhang
,
Y. P.
,
Guo
,
Z. J.
, and
Bu
,
X. K.
,
2011
, “
Computer-Aided Personalized Anatomic Plate of the Distal Femur
,”
J. Clin. Rehabil. Tissue Eng. Res.
,
15
(
13
), pp.
2309
2312
.
4.
Pendergast
,
M.
, and
Rusovici
,
R.
,
2015
, “
A Finite Element Parametric Study of Clavicle Fixation Plates
,”
Int. J. Numer. Methods Biomed. Eng.
,
31
(
6
), pp.
1
17
.
5.
Kharazi
,
A. Z.
,
Fathi
,
M. H.
, and
Bahmany
,
F.
,
2010
, “
Design of a Textile Composite Bone Plate Using 3D-Finite Element Method
,”
Mater. Des.
,
31
(
3
), pp.
1468
1474
.
6.
Satake
,
H.
,
Hanaka
,
N.
, and
Honma
,
R.
, Watanabe, T., Inoue,S., Kanauchi, Y., Kato, Y., Nakajima, T., Sato, D., Eto, J., Maruyama, M., Naganuma, Y., Sasaki, J., Toyono, S., Harada, M., Ishigaki, D., Takahara, M., and Takagi, M.,
2016
, “
Complications of Distal Radius Fractures Treated by Volar Locking Plate Fixation
,”
Orthopedics
,
39
(
5
), pp.
893
896
.
7.
Lee
,
D. S.
, and
Weikert
,
D. R.
,
2016
, “
Complications of Distal Radius Fixation
,”
Orthop. Clin. North Am.
,
47
(
2
), pp.
415
424
.
8.
Shah
,
J. J.
, and
Mantyla
,
M.
,
1995
,
Parametric and Feature Based CAD/CAM: Concepts, Techniques, and Applications
,
Wiley
, Hoboken, NJ.
9.
Berg
,
E. V. D.
,
Bronsvoort
,
W. F.
, and
Vergeest
,
J. S. M.
,
2002
, “
Freeform Feature Modelling: Concepts and Prospects
,”
Comput. Ind.
,
49
(
2
), pp.
217
233
.
10.
Nyirenda
,
P. J.
, and
Bronsvoort
,
W. F.
,
2008
, “
Numeric and Curve Parameters for Freeform Surface Feature Models
,”
Comput. Aided Des.
,
40
(
8
), pp.
839
851
.
11.
Bronsvoort
,
W. F.
,
Berg
,
E. V. D.
,
Bidarra
,
R.
, and
Noort
,
A.
,
2001
, “
Essential Developments in Feature Modeling
,”
Proceedings of the 7th International Conference on Computer-Aided Design and Computer Graphics
, International Academic Publishers, Beijing, China, pp. 6–15.http://oslo.ewi.tudelft.nl/Publications-new/2001/BVBN01a/
12.
Langerak
,
T. R.
,
2010
, “
Local Parameterization of Freeform Shapes Using Freeform Feature Recognition
,”
Comput. Aided Des.
,
42
(
8
), pp.
682
692
.
13.
Pernot
,
J. P.
,
Giannini
,
F.
,
Falcidieno
,
B.
, and
Leon
,
J. C.
,
2009
, “
Parameterised Free-Form Feature Templates
,”
IEEE International Conference on Shape Modeling and Applications
, SMI, Beijing, China, June 26–28, pp.
140
147
.http://dx.doi.org/10.1109/SMI.2009.5170175
14.
He
,
K. J.
,
Feng
,
G. B.
,
Chen
,
Z. M.
, and
Jiang
,
J. F.
,
2013
, “
A Representation of Freeform Features Based on Characteristic Curves
,”
Sci. Sin.
,
43
(
3
), pp.
374
385
.
15.
He
,
K.
,
Zhao
,
Z.
,
Geng
,
W.
,
Chen
,
Z.
, and
Zhu
,
Y.
,
2014
, “
Parametric Representation and Implementation of Freeform Surface Feature Based on Layered Parameters
,”
J. Comput. Aided Des. Comput. Graphics
,
26
(
5
), pp. 826–834.
16.
He
,
K.
,
Chen
,
Z.
,
Jiang
,
J.
, and
Wang
,
L.
,
2014
, “
Creation of User-Defined Freeform Feature From Surface Models Based on Characteristic Curves
,”
Comput. Ind.
,
65
(
4
), pp.
598
609
.
17.
Chen
,
X.
,
He
,
K.
,
Chen
,
Z.
, and
Xiang
,
W.
,
2015
, “
Quick Construction of Femoral Model Using Surface Feature Parameterization
,”
Mol. Cell. Biomech.
,
12
(
2
), pp.
123
146
.
18.
Park
,
B.-K.
,
Bae
,
J.-H.
,
Koo
,
B.-Y.
, and
Kim
,
J. J.
,
2014
, “
Function-Based Morphing Methodology for Parameterizing Patient-Specific Models of Human Proximal Femurs ☆
,”
Comput. Aided Des.
,
51
(
7
), pp.
31
38
.
19.
Mahaisavariya
,
B.
,
Sitthiseripratip
,
K.
,
Tongdee
,
T.
,
Bohez
,
E. L. J.
,
Sloten
,
J. V.
, and
Oris
,
P.
,
2002
, “
Morphological Study of the Proximal Femur: A New Method of Geometrical Assessment Using 3-Dimensional Reverse Engineering
,”
Med. Eng. Phys.
,
24
(
9
), pp.
617
622
.
20.
He
,
K.
,
Chen
,
Z.
, and
Zhao
,
L.
,
2011
, “
A New Method for Classification and Parametric Representation of Freeform Surface Feature
,”
Int. J. Adv. Manuf. Technol.
,
57
(
1
), pp.
271
283
.
21.
He
,
K. J.
,
Wang
,
L.
,
Chen
,
Z. M.
, and
Zhao
,
Z. X.
,
2014
, “
Reconstruction and Featurization of Local Region Based on CAD Surface Models
,”
Comput. Integr. Manuf. Syst.
,
20
(
10
), pp.
2360
2368
.
22.
Cheng
,
H. Y. K.
,
Lin
,
C. L.
,
Lin
,
Y. H.
, and
Chen
,
C. Y.
,
2007
, “
Biomechanical Evaluation of the Modified Double-Plating Fixation for the Distal Radius Fracture
,”
Clin. Biomech.
,
22
(
5
), pp.
510
517
.
23.
Brown
,
C. J.
,
Wang
,
C. J.
,
Yettram
,
A. L.
, and
Procter
,
P.
,
2004
, “
Intramedullary Nails With Two Lag Screws
,”
Clin. Biomech.
,
19
(
5
), pp.
519
525
.
You do not currently have access to this content.