Effect of irrigation mode, volume, medium and drill on heat generation during implant surgery: A review

Abstract

To avoid thermal necrosis has always remained a challenge during trauma and orthopaedic (T&O) surgeries. Use of different coolants of liquid form like water, saline and gaseous form like Carbon dioxide and nitrogen are frequently used for the same. Though the factors responsible for temperature control related to drilling process like drilling parameters and drill specifications are important, the contribution of coolant in temperature control cannot be underrated. In this review work, the different aspects related to coolant supply like 1) effects of saline and water on different bone defects, 2) comparative effectiveness of internal coolant flow through step drill and conventional drill, 3) effects of irrigation volume and 4) significance of without cooling, external liquid cooling and internal gas cooling on temperature rise is made. The results show that, whereas, carbon dioxide is having specific heat capacity of 0.846 kJ/ kg-K and of nitrogen gas it is1.04 kJ/kg-K and of water it is 4.18 kJ/kg- K. So water solution has an improved cooling capacity than both of the gases CO2 and N2. But gases can be directly injected at the location of chip formation and so they also proved as a worthy alternative.