Medical injection molding is a method used in the creation of plastic or silicone parts that are used for medical procedures. The plastic or silicone parts may include tools for surgery or parts that will be placed inside the human body. The process of medical injection molding differs from typical plastics injection molding, because of the medical element in the process.Every step of the process of medical injection molding must be done with absolute sterility. A sterile environment must be created from the start of the process to the final application of the part. If the instrument has become contaminated during the creation or the packaging or shipping process, it no longer can serve any medical use.