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AUSK Cementless Unicompartmental Knee System

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First in China, Globally Leading

Leading Cementless TKA Cementless Knee Technology

Cementless total knee arthroplasty (TKA) is gaining widespread recognition among surgeons and patients due to its ability to promote bone ingrowth and enhance long-term stability. According to the American Joint Replacement Registry (AJRR) 2023 report, its clinical utilization in the United States has exceeded 20% and continues to grow, rapidly becoming a key development direction in knee arthroplasty.

AUSK Cementless Uni-knee

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AUSK Cementless Uni-knee

The successful launch of the JUST BIO Cementless Total Knee System marks China’s transition from follower to leader in this field. To address the historically high failure rates of conventional cementless implants caused by coating limitations, we began developing 3D printing technologies in 2012 and formally launched the bio-knee project in 2018. Through proprietary 3D-printed zonal trabecular structures and a self-pressurizing mechanical fixation design, we overcame the high failure rate challenges of traditional cementless TKA.

Recent clinical data show this technology effectively reduces revision rates and improves long-term outcomes, becoming a globally recognized nextgeneration TKA solution that offers patients safer and longer-lasting treatment.

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3D-Printed Zonal Trabecular Technology
3D-Printed Monoblock Tibial Tray
Self-Pressurizing Mechanical Stability
Cement-Free Complication Avoidance
Bioactive Surface Knee Prosthesis

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Domestic first, globally leading

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Organism's knee is a rock, rock is the organism's knee

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Clinical Breakthrough of Self-Pressurizing Mechanical Fixation

Clinical Challenge
Conventional cementless implants may experience delayed osseointegration due to micromotion and rotation, leading to early loosening or migration.

Innovative Solution
The first-in-China, globally leading self-pressurizing mechanical structure uses expanding penetration claws to generate axial pressure, securely anchoring the tibial tray to cancellous bone. Together with lateral wings, this forms a “fourquadrant fixation” providing anti-rotation and anti-micromotion stability, accelerating and strengthening bone ingrowth.

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Validation of EBM 3D-Printed Zonal Trabecular Design

Clinical Challenge
Regional variations in proximal tibial trabecular bone cannot be matched by conventional homogeneous porous structures, leading to stress shielding and tibial tray subsidence.

Innovative Solution
Based on Frost’s theory, a three-zone trabecular structure was designed by varying topology across regions. The elastic modulus closely matches cancellous bone and regional load distribution, reducing stress shielding and enabling uniform bone ingrowth for long-term stability.
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Outstanding Mechanical Safety

Femoral component: Passed 10 million fatigue cycles under extreme loads,exceeding clinical requirements.
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Tibial tray: Passed 10 million cycles with excellent micromotion wear resistance.
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Tibial insert post: Passed 10 million cycles, demonstrating superior strength.
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Tibial insert post: Passed 10 million cycles, demonstrating superior strength.
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Low Wear Performance

Vitamin-E blended highly cross-linked UHMWPE insert delivers outstanding wear resistance.
Validated by 5 million wear cycles, showing significantly lower wear than comparable products.
Wear debris is round or oval, reducing inflammatory osteolysis risk.
Particle size mainly ranges from 1–10 μm, reducing osteolysis risk.
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Excellent Biocompatibility

All components meet GB/T16886.1-2022 biological evaluation standards.
At the cellular level, mechanical stimulation significantly promotes osteoblast proliferation, differentiation, and adhesion.

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Osteoblast proliferation after 2 days of culture under mechanical loading
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Osteoblast proliferation after 8 days of culture under mechanical loading
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Cytoskeletal structure of osteoblasts after 2 days of culture under mechanical loading
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Cytoskeletal structure of osteoblasts after 8 days of culture under mechanical loading
Proliferation and differentiation
Cell adhesion
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Multicenter Clinical Validation

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Preoperative Radiograph — West China Hospital, Sichuan University — Postoperative Radiograph
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Preoperative Radiograph — Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine — Postoperative Radiograph
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Preoperative Radiograph — The Third Hospital of Hebei Medical University — Postoperative Radiograph
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Preoperative Radiograph — Qilu Hospital of Shandong University — Postoperative Radiograph
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Models & Specifications

12536
Model Specification of Nail Sheath Fixation System (Φ1×L1), (X×L2)
JSPS-SS-Ⅱ Thread Diameter (Φ1) Screw Length (L1) Outer Sheath Code (X) Outer Sheath Length (L2)
7 25 E 27
7 30 E 32
8 25 E 27
8 30 E 32
876
Model Specification of Nail Sheath Fixation System (Φ1×L1), (X×L2)
JSPS-SS-Ⅱ Thread Diameter (Φ1) Screw Length (L1) Outer Sheath Code (X) Outer Sheath Length (L2)
7 25 E 27
7 30 E 32
8 25 E 27
8 30 E 32
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Model Specification of Nail Sheath Fixation System (Φ1×L1), (X×L2)
JSPS-SS-Ⅱ Thread Diameter (Φ1) Screw Length (L1) Outer Sheath Code (X) Outer Sheath Length (L2)
7 25 E 27
7 30 E 32
8 25 E 27
8 30 E 32