Percentage of the Patellar Contact Area Subjected to Contact Pressures Greater Than 5 MPa for Normal Knees and Unresurfaced Patellae Articulating With Each Femoral Component Design
| Prosthesis design | Knee flexion angle | |||
|---|---|---|---|---|
| 30° | 60° | 90° | 105° | |
| Normal | 0.3 | 0.4 | 5 | 7 |
| MG II | 0.3 | 5 | 30 | 27 |
| AMK | 2 | 17 | 26 | 28 |
| Ortholoc | 0.5 | 13 | 22 | 22 |
| PFC | 5 | 10 | 29 | 35 |
| IB II | 0.3 | 10 | 34 | 31 |
MG II = Miller/Galante II prosthesis (Zimmer, Warsaw, Ind.), AMK = Anatomic Modular Knee System (DePuy, Warsaw, Ind.), Ortholoc = Whiteside Ortholoc Modular prosthesis (Wright Medical Technology, Arlington, Tenn.), PFC = press-fit condylar prosthesis (Johnson & Johnson, Warsaw, Ind.) and IB II = Insall–Burstein II prosthesis (Zimmer)