A Comparative Study of the Properties of Bandage-form Splinting Materials

Abstract

The physical and mechanical properties of three new bandage-form splinting materials (Baycast, Crystona and Hexcelite) have been compared with those of plaster of Paris. Properties evaluated including working strength, rate of strength development, elastic modulus, exothermic heat and X-ray absorption coefficient. All mechanical testing was carried out on rectangular cross-section specimens in three-point bending. Whilst the three newer materials differed widely they all showed some advantages over plaster of Paris although none could be definitely stated as being superior in all respects. As regards mechanical properties, Baycast was found to be significantly stronger than the other materials and to have a higher strength to weight ratio. The difficulties in formulating laboratory tests which are clinically relevant are discussed and the need to consider other factors, such as ease of application and advantages to the patient, is emphasized.