A bone cement gun is a specialised medical instrument that is used to administer bone cement during orthopaedic procedures such as joint replacement surgeries. It is intended to accurately inject a biocompatible substance known as polymethylmethacrylate (PMMA), also known as bone cement, into the bone cavity or surrounding the implant site. The bone cement functions as a filler, giving the implant stability and forming a strong link with the patient’s bone.