Table 3 Seven compared patella shapes and their mechanical and geometric characteristics
No. | \(\left( a, b, \alpha \right)\) | Geometrical and mechanical characteristics |
|---|---|---|
1 | \(\left( 100, 20, 30\right)\) | Elongated elliptical shape satisfying only Requirement 2 |
2 | \(\left( 100, 20, 70\right)\) | Ideal elliptical shape satisfying both Requirements 1 and 2 |
3 | \(\left( 100, 20, 165\right)\) | Unsuitable for jumping that does not satisfy both Requirements 1 and 2 Elliptical shape |
4 | \(\left( 50, 20, 70\right)\) | Similar to an ideal elliptical shape, but a is not extremely large |
5 | \(\left( 100, 50, 70\right)\) | Similar to an ideal elliptical shape, but b is not extremely small |
6 | \(\left( 20, 20, 0\right)\) | Circular patella with a small radius that satisfies only Requirement 1 |
7 | \(\left( 100, 100, 0\right)\) | True circular shape with a large radius |