Multicriteria Decision Analysis in Improving Quality of Design in Femoral Component of Knee Prostheses: Influence of Interface Geometry and Material
Table 8
Performance of Co-Cr alloy designs in different criteria and ranking orders scenarios by TOPSIS method.
Objectives
Max
Min
Min
Min
Min
Min
Relative closeness to the ideal solution
Ranking
Relative weights of design criteria
0.19
0.15
0.19
0.11
0.14
0.23
A
B
C
D
E
F
Design 1
2.919
3.116
34.70
24.67
900.79
115.4
0.4080
12
Design 2
3.605
3.428
44.60
24.74
918.17
114.7
0.4075
13
Design 3
1.570
2.189
20.13
26.22
804.59
72.9
0.6180
1
Design 4
1.771
2.221
21.35
26.26
925.80
108.2
0.4315
10
Design 5
2.962
2.682
35.46
27.05
901.99
73.9
0.5865
4
Design 6
4.244
1.884
45.55
27.35
874.13
109.8
0.5212
6
Design 7
1.600
1.306
20.27
27.79
849.11
122.3
0.4487
9
Design 8
1.804
1.336
21.50
27.86
867.89
86.9
0.5750
5
Design 9
1.213
2.464
87.99
17.00
934.89
101.5
0.2863
16
Design 10
1.352
1.815
97.54
25.52
813.68
79.0
0.4637
8
Design 11
0.845
0.958
61.94
10.05
779.58
69.0
0.6107
2
Design 12
0.851
1.309
62.35
10.12
883.21
109.8
0.4086
11
Design 13
1.293
2.470
90.74
17.13
885.27
85.9
0.3960
15
Design 14
1.408
1.813
99.12
25.55
892.91
68.3
0.4690
7
Design 15
0.892
1.148
63.25
10.11
796.96
68.3
0.6033
3
Design 16
0.871
1.311
60.43
10.10
866.49
116.5
0.4000
14
A: minimum of stress mean in different regions explained in Figure 9 (MPa). B: maximum of stress STDV in different regions (MPa). C: maximum contact slip at femoral component/bone interface (μm). D: maximum peg stress (MPa). E: area of cross section (mm2). F: maximum stress at corner points of inner contour (MPa).
