Study of influence of tool geometry and temperature on bone substructure to reduce bone drilling injury

Abstract

For multiple piece bone fractures orthopaedic surgeons often prefer bone drilling. During bone drilling (cortical and cancellous) heat is generated. Heat accumulation above tolerance level of bone biomaterial causes permanent bone injury. This leads to delayed restoration period. This can be avoided by controlling drill tool geometrical aspects and in depth information of bone substructure. Among various angles of drill tool, helix angle is very important as it gives way out to bone chip and thereby heat removal from drilling site. Temperature affects bone up to cellular level and so to identify thermal damage, bone substructure has to study. This paper deals with the study of drill tool geometrical aspects that contributes to temperature rise and its effect on bone substructure.