Increasing the survivability of the short leg walking cast.
by David L. Witmer

Introduction

The short leg walking cast (SLWC) has been used since the 1940s for the treatment of orthopaedic injuries to the lower leg. SLWC immobilization has become the accepted standard of treatment for certain foot, ankle and lower leg fractures as well as some soft tissue injuries.

Due to the high stresses and impact damage associated with the mechanics of weight-bearing, the SLWC is very susceptible to breakdowns. In addition, walking casts are also frequently exposed to environmental conditions such as dirt and moisture that can accelerate materials failure and breakdown of the weight bearing surface. The mechanical properties and characteristics of synthetic casting materials have been well documented. Several previous studies have examined the stresses associated with walking casts under normal and abnormal use, and detailed their vulnerability to breakdown, especially along the plantar or weight-bearing surface.