TKA Prosthesis- LDK X4 Primary Total Knee Arthroplasty
1.
The anterior condyle of the femoral prosthesis is provided with reduced width and thickness to decrease the anterior condyloid pressure and quadriceps tension. The same sagittal geometry and the smooth curvature allow the patella not to increase the force of the quadriceps femoris when the knee stretches and flexes. In combination with the deep patellar trochlear groove, it can be ensured that the patella is stable and in the groove even in high flexion without dislocation, and steady contact between the patella and femoral prosthesis is maintained at all times.
2.
The femoral prosthesis is designed with a slightly curved coronal plane to maximize the contact area so as to reduce peak pressure on the polyethylene insert. The point-to-point edge bearing is eliminated during the varus-valgus rotation of the knee, so that the tibiofemoral joint always maintains face-to-face contact.
3.
The anterior patellar notch of the polyethylene insert reduces the additional pressure and tension on the quadriceps femoris during high flexion.
4.
The posterior condylar curvature is increased. The tibiofemoral articular surface remains surface contact rather than point contact when flexion is up to 135 degrees.
5.
Open intercondylar fossa design: The intercondylar osteotomy is reduced, and the bone is preserved to the greatest extent for the patient.
6.
Optimized cam-post structure: The cam is still maintained at the base of the column while the knee is in high flexion, preventing the occurrence of cervical dislocation during high flexion to a limited extent.
7.
A unique insert locking mechanism is provided. The secondary fixation with metal anchors can eliminate the fretting wear between the two.
8.
The tri-wing structure prevents rotation and avoids stress concentration.
Femoral Condyle Specification
Material: Co-Cr-Mo
Main Technical Parameters of Femoral Condyle (RY A201)
Unit (mm)
| Product Model | Specification | Transverse Diameter | AP Diameter |
| 50111P | 1L | 57 | 53 |
| 50112P | 2L | 60 | 56 |
| 50113P | 3L | 63 | 59 |
| 50114P | 4L | 66 | 62 |
| 50115P | 5L | 71 | 66 |
| 50116P | 1R | 57 | 53 |
| 50117P | 2R | 60 | 56 |
| 50118P | 3R | 63 | 59 |
| 50119P | 4R | 66 | 62 |
| 50120P | 5R | 71 | 66 |
Tibial Tray Specification
Material: Co-Cr-Mo
Main Technical Parameters of Tibial Tray (RY B401)
Unit (mm)
| Product Model | Specification | Transverse Diameter | AP Diameter |
| 50126 | 1# | 61 | 41 |
| 50127 | 2# | 64 | 43 |
| 50128 | 3# | 67 | 45 |
| 50129 | 4# | 71 | 47 |
| 50130 | 5# | 76 | 51 |
Tibial Insert Specification
aterial: Ultra-High Molecular Weight Polyethylene
Main Technical Parameters of Tibial Insert (RY C401)
Unit (mm)
| Product Model | Specification | Transverse Diameter | AP Diameter |
| 50126 | 1# | 61 | 41 |
| 50127 | 2# | 64 | 43 |
| 50128 | 3# | 67 | 45 |
| 50129 | 4# | 71 | 47 |
| 50130 | 5# | 76 | 51 |
Patella
Material: Ultra-High Molecular Weight Polyethylene
Main Technical Parameters of Patella (RY D01)
Unit (mm)
| Product Model | Specification | Transverse Diameter | AP Diameter |
| 50147B-8 | Φ30/ 8 | Φ30 | 8 |
| 50141B-8 | Φ32/ 8 | Φ32 | 8 |
| 50141B-10 | Φ32/ 10 | Φ32 | 10 |
| 50142B-8 | Φ35/ 8 | Φ35 | 8 |
| 50142B-10 | Φ35/ 10 | Φ35 | 10 |
| 50143B-10 | Φ38/ 10 | Φ38 | 10 |
