b-one ortho

• Enhance Patients
• Satisfaction
  
  

Research shows that approximately 20% of the patients are still unhappy with their TKAs1.

Mid-flexion instability is one of the main contributing factors to dissatisfaction, resulting

in unstable sensation during common daily activities such as stair climbing and raising

from a chair. Patellofemoral complications, such as peripatellar pain and patella clunk, are

also affecting post-op patient satisfaction in PS knees.

Apart from patient satisfaction, efficient, reliable and reproduceable intra-operative experience,

which is represented in the need of broad range of size options, size interchangeability, reduced

risk of bone fracture, accurate bone resection and ease of use, have also been important

factors for surgical outcome. MOBIOTM Total Knee System aims to improve both patient

satisfaction and intra-operative surgeon experience.

Traditional theories believed that kinematics of the knee occurs in the sagittal plane and when viewed from an axis perpendicular to the sagittal plane, the instant center of rotation forms a J-Curve2. Multi-Radius implants are developed with J-Curve as its underlying theory, which incorporates a larger radius at the distal part of the implant in order to provide stability in extension and smaller radius in flexion in order to provide rotational freedom, the stability of entire construct, however, is compromised due the the change in geometry3, which results in unstable sensation during daily activities such as gardening, stair-climbing and rising from a chair.

In 1986, Mark Kester (CSO of b-ONE) et al. documented that the motion of the knee occurs about a fixed flexion/extension axis that is not perpendicular to the sagittal plane, the kinematics of the knee could be viewed as two somehow related motion of flexion/extension and tibial rotation4. Later studies confirmed that this axis coincides with epi-condylar axis. Compared to the traditional Multi-Radius knees, MOBIOTM Single Radius design avoids change

in ligament tension and resulting anterior shift of the femur, providing more stable midflexion. Meanwhile, single radius provides longer quadriceps lever arm which enhances quadriceps muscle efficiency, enabling patients to flex the knee more easily with reduced patellar pressure5,6. Literature shows that patients with single radius knees show faster rehabilitation.