Background:
Many studies were done to assess the mechanical characteristics of the bandage
casts with regards to different specifications of materials under different parameters. Many patents
have been designed on the various types of casting materials such as POP, fiberglass and polyester. A
recent trend in the patent is to explore a hybrid combination for bandage casts to withstand structural
failure, crack formation or deformation.
Objective:
This study aims to study the effect of impact force on plaster of Paris, fiberglass and hybrid
bandage casts.
Methods:
There different bandage casts were constructed using plaster of Paris, fiberglass and a hybrid
combination of plaster of Paris and fiberglass. They were subjected to Charpy impact test, three-point
flexural test, and Rockwell B hardness test.
Results:
The impact characteristics, energy absorption properties, ductility, rigidity, strength, stiffness
and indentation hardness of the hybrid bandage cast were found to be greatly influenced from being a
composite of two casts and interfaces. It was found that the impact energy capable of being absorbed
prior to fracture for the plaster of Paris, fiberglass and hybrid were 1.225 Joules, 11.125 Joules and
6.750 Joules, respectively
Conclusion:
Hybrid bandage casts possessed improved impact characteristics compared to plaster of
Paris bandage casts and more cost-effectiveness as compared to fiberglass bandage casts