The Army Medical Biomechanical Research Laboratory porous laminate patellar-tendon-bearing prosthesis.

Recent advances in below-knee prosthetics.

' Executive Director, Committee on Prosthetics Research and Development, National Research Council, 2101 Constitution Ave., N. W., Washington, D.C. 20418. The concept of constructing a belowknee prosthesis with side joints and a thigh lacer was set forth by the Dutch surgeon Verduin in 1696 (Fig. 1) and followed universally until the advent of the patellar-tendon-bearing prosthesis in the late ...

Pressures in critical regions of the below-knee patellar-tendon-bearing prosthesis.

In a biomechanical analysis of the forces transmitted to an amputated limb by a below-knee patellar-tendon-bearing prosthesis, R@di% (1) showed in 1962 that the principal forces occur in the patellar ten bn, the distal anterior tibial, the latera tibial condylar, and the medial tibial condylar regions. Apparantly the design of this prosthesis was such that the forces were directed to those area...

Changes of the Patellar Tendon Moment arm Length in Different Knee Angles: A Biomechanical in Vivo Study

Patellar tendon moment arm length (PTma) changes at different knee flexion angles have not been determined in invivo studies. We aimed to determine PTma in four different knee angles using Magnetic Resonance Imaging (MRI) topredict in vivo changes in the moment arm length from different knee angles during running.PTma was measured as the perpendicular distance from muscle–tend...

Application of prosthetics-orthotics principles to treatment of fractures.

1 School of Medicine, University of Miami, Jackson Memorial Hospital, Miami, Fla. 33152. Greater knowledge and understanding of bioengineering by the prosthetics and orthotics industries during the past twenty years have resulted in the development of highly functional and sophisticated appliances. For example, modern prostheses for lowerand upperextremity amputees are now designed with proper ...

Variants of the PTB (patellar-tendon-bearing) below-knee prosthesis.