3D Knee System

3D Knee™


		The 3DKnee is the result of more than a decade of research. This is truly the first knee developed to work in conjunction with the true kinematics of total knees. Based on a comprehensive analysis of knee kinematics through fluoroscopic review, tibial plateau resection and tibial insert retrieval analysis, an opportunity has been identified to improve on existing designs in total knee replacement.
Enhances Quadriceps Function Provides excellent power, especially early in flexion, by rolling out to engage the patella quickly, while maintaining great leverage by preventing anterior slide and shortening of the quadriceps lever-arm. Rollout of the femur aligns the quadriceps to the center of the patella, improving quadriceps leverage while reducing patella stresses. Reduces Contact Stress Increases implant longevity by reducing polyethylene contact stresses as a result of a congruent lateral condyle.		Improves Fermoral/Patella Mechanics Improves femoralpatella mechanics by promoting early rollout of the femur to engage the patella in a deep patella groove. Improves ROM Improves range of motion by maintaining the posterior position of the femoral condyles on the tibia during flexion.

Femoral Component Congruent lateral condyle Deepened patella groove Wide medial condyle Single radius curvature for increased contact area up to 80°		Tibial Component Asymmetric baseplate Winged keeled geometry Two tibia size options for each 3DKnee insert
Domed Patellar Domed geometry for optimal contact area with the deepened trochlear groove «Available in sizes 26-38mm		Insert Congruent lateral condyle Size specific for optimal congruency to the femur Centered posteriorly to encourage increased femoral rollback Wide medial condyle for translation
Case Study History: "...43 year old white female with systemic lupus and erythematous ... and who now has a 13 year history for progressively worsening right and left knee complaints..." Medical Diagnoses: "1) She has severe destruction of both knees. 2) She has had a history of lupus ..." Procedure: November 5, 2001 Pre-op: ROM (L) Extension: 5 degrees Flexion: 105 degrees Range: 100 degrees Pre-op KSS (L) Knee Score: 43 Function Score: 70 Last Follow-Up: December 2, 2003 (24 months) ROM (L) Extension: 0 degrees Flexion: 137 degrees Range: 137 degrees KSS (L) Knee Score: 100 Function Score: 100