Rotating Hinge Knee Replacement

The hinge system utilizes the same stems cones patellas and both trabecular metal precoat augments as the nexgen lcck constrained knee system.

Rotating hinge knee replacement.

Rotating knee replacement implants. Pour ae 1 parvizi j slenker n purtill jj sharkey pf. Because a normal knee joint rotates a small amount the rotating knee replacements are intended to more closely replicate normal knee motion. S rom noiles rotating hinge knee system nrh is a clinically proven 1 hinge design for patients with severe soft tissue instability and or bone deficiency.

Athanasian md and dae geun jeon md abstract. Designs that have the center of rotation located posteriorly can cause booking of the joint which may result in stress on the cement interfaces or accelerated polyethylene bearing wear in the hinge. 1 rothman institute 925 chestnut street philadelphia pa 19107 usa. 2 1999 a rotating hinge knee replacement for malignant tumors of the femur and tibia akira kawai md john h.

Boland md edward a. A rotating hinged total knee prosthesis may be utilized for the treatment of global instability or severe bone loss around the. Unfortunately long term studies on the early rotating hinge designs continued to show disappointing results with poor outcomes 11 15. The system allows for optimal fit and fill for a wide range of bone deficiencies with the utilization of modular wedges stem extensions and metaphyseal sleeves.

The journal of arthroplasty vol. Although most rh knee surgeries involve revision arthroplasty. Subsequent hinged knee replacements attempted to address design flaws of the earlier generation implants. The rotating knee replacement implants not only swing back and forth like a hinge but the knee can also rotate inwards and outwards a twisting motion.

The rotating hinge design was conceived to improve outcomes compared to fixed hinge devices. In many conventional rotating hinge knee designs the hinge bears the majority of the compressive load until full extension is achieved. Nexgen rotating hinge knee the nexgen rh knee features a bone conserving modular hinge design that addresses key issues related to many conventional rotating hinge knee designs. Healey md patrick j.