Table 1.
Strain electric measurements of each group (values are represented in mean (SD)) ( n = 8)
| Point |
Normal femur after traditional prosthesis transplantation |
Femur after traditional prosthesis transplantation |
Normal femur after anatomic prosthesis transplantation |
Femur after anatomic prosthesis transplantation |
||||
|---|---|---|---|---|---|---|---|---|
| Strain (×10 −6 ) | Stress (MPa) | Strain (×10 −6 ) | Stress (MPa) | Strain (×10 −6 ) | Stress (MPa) | Strain (×10 −6 ) | Stress (MPa) | |
| 1 |
−746 (21.2) |
−13.1 (1.6) |
|
|
−738 (23.2) |
−12.9 (1.8) |
−598 (31.2) |
−10.5 (1.6) |
| 2 |
−712 (19.4) |
12.5 (1.2) |
|
|
−725 (27.1) |
−12.7 (1.6) |
−571 (26.3) |
−10.0 (1.4) |
| 3 |
−1,872 (31.3) |
−32.9 (2.4) |
|
|
−1,894 (31.4) |
−33.3 (2.7) |
−1,418 (35.0) |
−25.0 (1.7) |
| 4 |
−2,001 (27.1) |
−35.2 (1.9) |
|
|
−2,016 (36.2) |
−35.4 (2.7) |
−1,627 (29.2) |
−28.6 (2.0) |
| 5 |
−1,079 (28.2) |
−19.0 (1.3) |
|
|
−1,098 (28.1) |
−19.3 (1.8) |
−816 (31.2) |
−14.3 (1.4) |
| 6 |
−728 (31.4) |
−12.8 (1.7) |
−462 (−8.13) |
8.13 (0.8) |
−719 (22.3) |
−12.7 (1.4) |
−518 (24.6) |
−9.1 (0.8) |
| 7 |
1,472 (29.6) |
−25.0 (2.4) |
798 (14.1) |
14.1 (1.1) |
1,416 (28.4) |
24.9 (2.3) |
973 (29.1) |
17.1 (1.2) |
| 8 |
−1,118 (27.4) |
−19.7 (1.8) |
−748 (19.6) |
13.2 (0.8) |
−1,127 (25.6) |
−19.8 (1.7) |
−835 (23.6) |
−14.6 (1.3) |
| 9 |
878 (19.6) |
−15.5 (1.4) |
543 (27.4) |
9.6 (1.2) |
864 (27.2) |
15.2 (1.1) |
632 (19.1) |
11.1 (0.7) |
| 10 |
−608 (19.8) |
−10.7 (1.2) |
573 (27.4) |
10.1 (0.9) |
−612 (19.1) |
−10.8 (1.2) |
593 (25.8) |
−10.4 (1.2) |
| 11 |
−1,563 (30.3) |
−27.5 (2.8) |
−1,009 (28.1) |
17.7 (1.3) |
−1.572 (30.2) |
−27.7 (2.1) |
−1,218 (28.2) |
−21.4 (1.9) |
| 12 |
−758 (19.6) |
−13.3 (1.1) |
−532 (19.9) |
9.4 (0.8) |
−774 (19.2) |
−13.6 (1.6) |
−631 (22.6) |
−11.1 (1.0) |
| 13 |
1,352 (27.1) |
−23.8 (1.9) |
962 (22.6) |
15.2 (0.9) |
1,364 (31.1) |
24.6 (2.3) |
1,139 (20.4) |
20.0 (1.4) |
| 14 |
−701 (28.4) |
−12.3 (1.4) |
−538 (18.1) |
9.5 (0.6) |
−717 (22.5) |
−12.6 (1.4) |
−608 (26.3) |
−10.7 (0.9) |
| 15 |
749 (18.6) |
−13.2 (0.91) |
562 (26.3) |
9.9 (0.7) |
768 (19.2) |
13.5 (1.2) |
627 (19.4) |
11.0 (1.0) |
| 16 |
−412 (28.7) |
−0.73 (0.09) |
371 (16.2) |
65.2 (3.6) |
−406 (18.1) |
−7.1 (0.8) |
−398 (22.4) |
−7.0 (0.6) |
| 17 |
−1,968 (23.1) |
−34.6 (2.6) |
−1,618 (31.7) |
28.4 (1.6) |
−1,992 (24.1) |
−35.0 (2.6) |
−1,789 (32.4) |
−31.4 (2.6) |
| 18 | 1,218 (25.1) | 21.4 (1.8) | 1,064 (28.2) | 18.7 (1.2) | 1,214 (22.4) | 21.3 (2.3) | −1,163 (33.1) | 20.4 (1.2) |
The strain values of 6, 7, 9, 10, 11, 12, 14, 15, 16, and 18 measurement points in the reservation and traditional femoral prosthesis groups were analyzed by paired t test; the difference was significant (p < 0.05). 1, 2, 3, 4, and 5 traditional measuring points were destroyed and cannot be measured. Experimental results showed that the strain values of 6, 7, 9, 10, 11, 12, 14, 15, 16, and 18 measurement points in the traditional prosthesis group were less than those of the Germany femoral neck retention prosthesis group (p < 0.05).