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PATIENT-SPECIFIC TECHNIQUES
ATTUNE™ Patient-Specific Alignment
PATIENT-SPECIFIC TECHNIQUES
ATTUNE™ Patient-Specific Alignment
Used together, the ATTUNE™ Knee and Patient-Specific Alignment Techniques are designed to preserve the soft tissue envelope and reduce the requirement for soft tissue releases, helping to restore stable knee motion and improve patient satisfaction after total knee arthroplasty (TKA).
IMAGES
Key Resources
VELYS™ Robotic Assisted Solution Femur First Approach Surgical Technique
VELYS™ Robotic Assisted Solution Tibia First Approach Surgical Technique
Instructions for Use
Patient-Specific Alignment
A UNIQUE APPROACH
What is Patient-Specific Alignment?
Patient Specific Alignment (PSA) is a surgical technique that, together with the ATTUNE™ Knee System, aims to restore natural knee function by preserving the soft tissue surrounding the knee joint during total knee arthroplasty.
Features and Benefits
Enhanced Biomechanical Function
Patient-specific surgical techniques have been reported to achieve enhanced biomechanical function, improved soft tissue balance, more natural kinematics, and ultimately better patient outcomes.1,2
Long-Term Implant Survivorship
A combination of ATTUNE™ Knee and PSA aims to restore soft tissue function and natural kinematics. A study has indicated that a PSA-style technique has a survivorship of 97.5% at 10 years.3
Improved Patient Satisfaction
The combination of the ATTUNE™ Knee and Patient-Specific Techniques is designed to preserve the soft tissue envelope, and reduce the requirement for soft tissue releases, helping to restore stable knee motion to help improve patient satisfaction.
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Mechanical Alignment (MA) vs. Patient Specific Alignment (PSA)
While MA has been seen to generate excellent clinical outcomes…
20%
20% of TKA patients are unhappy with MA.4
54%
Up to 54% of MA TKA patients have residual symptoms such as pain, swelling, and grinding.5
RESTORING NATURAL KINEMATIC MOTION
PSA + ATTUNE™ Knee
The native knee is seen to be stable medially, and roll back laterally, however free to move posteriorly on the medial side in high flexion.6
Multiple in vivo studies have demonstrated ATTUNE™ Knee to exhibit similar medial stability to native knee, also allowing the freedom to roll back in high flexion.7
Using PSA alignment in combination with the ATTUNE™ Knee allows surgeons to restore soft tissue function & native anatomy within tested boundaries.
PSA Professional Education
Watch Dr. Dalury perform a total knee procedure using the VELYS™ Robotic-Assisted Solution and the femur-first approach. This content is intended for Health Care Professionals in the United States.
More Videos
References
1. Kang KT, Koh YG, Nam JH, Kwon SK, Park KK. Kinematic Alignment in Cruciate Retaining Implants Improves the Biomechanical Function in Total Knee Arthroplasty during Gait and Deep Knee Bend. J Knee Surg. 2020 Mar;33(3):284-293
2. Dossett, et al. Is the Function of Kinematically Aligned TKA Better Than Mechanically Aligned TKA? Results of a Two-Year Randomized Control Trial. Bone Joint J. 2014 Jul;96-B(7):907-1
3. Howell S, et al Implant Survival and Function Ten Years After Kinematically Aligned Total Knee Arthroplasty: Journal of Arthroplasty (2018)
4. Gunaratne R, Pratt DN, Banda J, Fick DP, Khan RJK and Robertson BW (2017). Patient Dissatisfaction Following Total Knee Arthroplasty: A Systematic Review of the Literature. The Journal of Arthroplasty, 32(12), pp.3854–3860.
5. Parvizi J, Nunley RM, Berend KR, Lombardi AV, Ruh EL, Clohisy JC, Hamilton WG, Della Valle CJ and Barrack RL (2014). High Level of Residual Symptoms in Young Patients After Total Knee Arthroplasty. Clinical Orthopaedics & Related Research, 472(1), pp.133–137.
6. P. Johala,*, A. Williamsa, P. Wraggb, D. Hunta, W. GedroycbTibio-femoral movement in the living knee. A study of weight bearing and non-weight bearing knee kinematics using ‘interventional’ MRI. J Biomech.2005 Feb;38(2):269-76. 7. AdrijaSharma , Thomas K. Fehring, William L. Griffin , J. Bohannon Mason. In Vivo Kinematic Performance of Gradually Variable Radius PS Primary TKA J Arthroplasty.2020 Apr;35(4):1101-1108.
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