Orthopedics — Total Knee Replacement
Freedom<br> Total Knee®
The one and only 7 tangential radii knee implant in the world — an advanced system designed to address the anatomical, physiological and lifestyle needs of patients.
7
Tangential radii
155
Degrees of high flexion
USFDA
Approved
01 — The system
Successful, predictable and reproducible results
First with 7 tangential radii
The Freedom Total Knee® System is the first USFDA-approved knee system with 7 tangential radii, resulting in excellent implant-to-bone fit.
Optimal high flexion
Developed using advanced design engineering technologies, the system’s unique design allows patients to achieve optimal high-flexion motion.
Conservative bone resection
Compared to general knee replacement procedures, the system requires minimal bone cutting and enables a more conservative bone resection.
Customisable sizing
Its intuitive design offers surgeons the freedom to customise size options to better fit the implants to the patient’s knee.
02 — Design rationale
Coordinate articular geometry of the natural femur
The Freedom femoral design is based on functional principles of progressive multi-radii patello-femoral and tibio-femoral contact areas.
01
7 tangent radii
Radii 1, 2 and 3 ensure optimized patella-femoral contact. Radii 4, 5, 6 and 7 control femoral rollback and flexion over a wide array of biomechanical requirements, from walking to climbing stairs.
02
Smooth extensor mechanism
7 radii along with a thin anterior flange and a 6-degree deep trochlear groove facilitate predictable patello-femoral tracking — helping to reduce anterior knee pain.
03
Increased femoral rollback
A multi-radii design gives predictable femoral rollback, allowing high flexion up to 155 degrees for various daily and social activities.
04
Asymmetrical post-cam mechanism
A modified post-cam mechanism allows rotation up to 15 degrees at deep flexion, preventing post-cam impingement and reducing wear and tear of the poly.
05
Prevention of edge loading
Freedom Knee concentrates load towards the centre of the poly at deep flexion, rather than at the condylar edges.
06
Minimised micro motion in tibia
A 5-point locking mechanism and an optimized inside surface roughness averaging 11 µin reduce back-side wear in the tibial tray, improving durability.
07
Bone conservation
A thin anterior flange, low-profile box and multi-radii design minimise posterior condylar resection, resulting in maximum bone conservation.
08
Locking system and materials
5-point cobalt chrome tibial locking system with 3-degree and 30 mm keel; ram-extruded poly UHMWPE, GUR 1020. Both CR and PS tibial inserts share identical locking mechanisms to mate.
09
Modularity and compatibility
CR and PS femurs, metal-backed tibial trays and inserts — with compatibility of a 2-size mix and match in critical sizes.
03 — Global shape and sizing
Optimal A-P to M-L ratios for global patients
Femoral components (mm)
| Femur | A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|---|
| M/L | 54.00 | 58.00 | 62.00 | 64.00 | 66.00 | 70.00 | 74.00 | 78.00 |
| A/P | 51.00 | 54.00 | 58.00 | 60.00 | 62.00 | 66.00 | 70.00 | 74.00 |
Metal-back tibial trays (mm)
| Tray | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| M/L | 59 | 62 | 66 | 66 | 71 | 72 | 76 | 78 |
| A/P | 40 | 40 | 42 | 46 | 48 | 50 | 52 | 54 |
Bone conservation, by femoral size
| Femoral size | A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|---|
| Post-condylar resection (mm) | 7.2 | 7.7 | 8.2 | 8.5 | 8.8 | 9.4 | 9.8 | 10.4 |
| Box-cut resection (cm³) | 4.37 | 5.42 | 6.44 | 7.14 | 7.91 | 9.69 | 11.26 | 13.44 |
04 — Product details
Specification ledger
| Item | Value |
|---|---|
| Product | Freedom Total Knee® System |
| Category | Orthopedics · total knee replacement |
| Femoral geometry | 7 tangential radii · 6° deep trochlear groove |
| Flexion | High flexion up to 155° |
| Components | CR and PS femurs (L & R) · metal-backed tibial trays and inserts · all-poly tibia |
| Materials | Cobalt chrome · ram-extruded UHMWPE, GUR 1020 |
| Patella diameters | 25, 28, 31, 34, 37 and 40 mm |
| Liner thickness | 9, 11, 14 and 17 mm |
| Fixation | Cemented use only |
| Regulatory | USFDA-approved |
Certification & documentation
Product literature on request
Full documentation is available to healthcare professionals and professional buyers on request.
| Document | Format |
|---|---|
| Freedom Knee® design rationale | |
| Clinical data | |
| Instructions for Use (IFU) |
Get in touch
Request the Freedom Total Knee® brochure and IFU
Caution: this device is restricted to sale by or on the order of a licensed physician. Warning: this device is intended for cemented use only. Please see the package insert for complete device description, indications, contraindications, precautions, adverse effects, warnings, materials, sterilization and patient guidance associated with the Freedom Total Knee® System.
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