Defining normal
Advanced technology should lead to extraordinary outcomes. Using cutting edge computer simulation, JOURNEY◊ II TKA is designed to restore the function of the normal knee; replicating anatomic shape, position and motion resulting in higher patient satisfaction.1
The JOURNEY II TKA has been designed to do what no other total knee replacement currently does, restore normal position, shapes and motion.2-5
Normal shape
Accurate replication of anatomic, asymmetric femoral profile
Medial concavity and lateral convexity of the tibial geometries restored
Normal position
The JOURNEY II knee is designed with an anterior tibial sulcus to restore the native knee’s normal starting AP position, preventing paradoxical motion.
The JOURNEY II knee is designed with an anterior dwell point and 3° varus jointline which restores the natural patellar tendon angle and improves patella track.
Normal motion
Full extension: 0º
The anatomic position in full extension reduces paradoxical motion in the early gait cycle
Mid-flexion: 1-90º
Concave medial tibial plateau provides anatomic stability while proprietary convex lateral plateau drives external rotation
Asymmetrical posterior cam promotes femoral external rotation and aligns anatomic patella femoral angle
Deep-flexion: 90+º
External rotation is maximized to reduce stress in the knee
Mimicking the normal knee, JOURNEY II TKA translates bilaterally posteriorly with lateral plateau relief to maximize deep flexion6
References
1. JOURNEY II TKA Design Rationale 11.17 00225V3
2. J Orthop. 2017 Jan 7;14(1):201-206. doi: 10.1016/j.jor.2016.12.005. eCollection 2017. Bi-cruciate substituting total knee arthroplasty improved medio-lateral instability in mid-flexion range
3. Short-term Range of Motion is Increased after TKA with an asymmetric bicruciate stabilized implant. Accepted Poster Presentation, AAOS 2018 New Orleans. Kaitlin M. Carroll, Peter K. Sculco, Brian CMichaels,Richard L. Murphy, Seth A, Jerabek, David J. Mayman
4. A comparison of Rolback Ratio between Bicruciate Substituting Total Knee Arthroplasty and Oxford Unicompartmental Knee Arthroplasty. DOI: 10.1055/s-0037-1604445. ISSN 1538-8506. The Journal of Knee Surgery. Takanori Iriuchishima, Keinosuke Ryu
5. In Vivo Kinematic Comparison of a Bicruciate Stabilized Total Knee Arthroplasty and the Normal Knee Using Fluoroscopy Trevor F. Grieco, MS a, *, Adrija Sharma, PhD a, Garett M. Dessinger, BS a, Harold E. Cates, MD b, Richard D. Komistek, PhD. The Journal of Arthroplasty, September 2017 https://doi.org/10.1016/j.arth.2017.09.035
6. Grieco, Trevor F., et al. “In Vivo Kinematic Comparison of a Bicruciate Stabilized Total Knee Arthroplasty and the Normal Knee Using Fluoroscopy.” The Journal of Arthroplasty, 2017, doi:10.1016/j.arth.2017.09.035.
7. Victor, J., Mueller, J.K.P., Komistek, R.D. et al. Clin Orthop Relat Res (2010) 468: 807. https://doi.org/10.1007/s11999-009-1072-7
8. Ref: Smith & Nephew OR-11-172
9. Data on file with Smith & Nephew.