Table 3 Reaction force and moment on the mesial end of stainless-steel key loops and the moment/force ratio for different loading types
From: Mechanical force system of double key loop with finite element analysis
Retraction force (N) | X (N) | Z (N) | Moment (N mm) | M/F (mm) | |
|---|---|---|---|---|---|
Type-1 single | 2 | 2.00 | − 0.742 | 7.06 | 3.53 |
4 | 4.00 | − 1.483 | 14.12 | 3.53 | |
6 | 6.00 | − 2.225 | 21.18 | 3.53 | |
Type-1 | 2 | 2.00 | − 0.417 | 7.11 | 3.56 |
4 | 4.00 | − 0.835 | 14.22 | 3.56 | |
6 | 6.00 | − 1.252 | 21.33 | 3.56 | |
Type-2 | 2 | 1.98 | 0.223 | 6.48 | 3.27 |
4 | 3.96 | 0.445 | 12.97 | 3.27 | |
6 | 5.94 | 0.668 | 19.46 | 3.27 | |
Type-3 +5 | 0 | 0.00 | − 0.517 | 8.79 | – |
1 | 0.99 | − 0.308 | 9.54 | 9.62 | |
2 | 1.98 | − 0.167 | 11.43 | 5.77 | |
4 | 3.96 | − 0.058 | 18.20 | 4.59 | |
6 | 5.94 | 0.028 | 25.35 | 4.26 | |
Type-3 +10 | 0 | 0.00 | − 1.105 | 18.78 | – |
1 | 0.99 | − 0.895 | 19.51 | 19.69 | |
2 | 1.98 | − 0.685 | 20.24 | 10.21 | |
4 | 3.96 | − 0.379 | 23.64 | 5.96 | |
6 | 5.94 | − 0.202 | 29.26 | 4.92 | |
Type-3 +15 | 0 | 0.00 | − 1.690 | 28.73 | – |
1 | 0.99 | − 1.480 | 29.46 | 29.73 | |
2 | 1.98 | − 1.273 | 30.23 | 15.26 | |
4 | 3.96 | − 0.862 | 31.83 | 8.03 | |
6 | 5.94 | − 0.591 | 35.84 | 6.03 |