Estimation of the Load-Bearing Functions of the Patellar-Tendon-Bearing Orthosis.

The patellar-tendon-bearing prosthesis.

Obviously there is no "ideal" leg substitute short of regenerating or transplanting another normal leg. The surgeon, the prosthetist, and the amputee alike have long accepted major deficiencies in leg prostheses as inescapable concomitants of aid in a situation demanding drastic compromise. Substitution of an artificial leg for a natural one involves not only manual skills and the principles of...

The effect of the patellar tendon-bearing cast on loading.

We assessed the unloading effect of the patellar tendon-bearing (PTB) cast in five healthy volunteers using a new system for analysis of dynamic plantar pressure. We devised a method to improve the unloading effect of the PTB cast, and tested this using the same system. Our findings showed that the conventional PTB cast only achieved unloading of 30% of the body-weight and that the part of the ...

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

Premodified casting for the Patellar-Tendon-Bearing prosthesis.

1 This work was supported in part by Veterans Administration Contract V663P-505. 2 Director, Prosthetics Research Study, Seattle, Wash. 3 Consultant, Rehabilitation Engineering, Social and Rehabilitation Service, Department of Health, Education, and Welfare, Washington, D.C. Methods for producing a functional, comfortable, and well-fitting patellartendon-bearing prosthesis have been the subject...

End-bearing characteristics of patellar-tendon-bearing prosthesis--a preliminary report.

The present work was aimed at investigating the degree of participation of the stump end in the weightbearing process in PTB prostheses. Despite the belief that the stump end is not capable of withstanding high loads, it was revealed that most patients can bear from 15 percent up to 45 percent and more of their weight on the stump end. The limited number of patients studied diminishes the stati...