This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
The material used in vertebroplasty is - 
Select and explain. 
A. Isomethyl methacrylate, B. Isoethyl methacrylate, C. Polyethyl methacrylate, D. Polymethyl methacrylate
D: Polymethyl methacrylate
Answer: D: Polymethyl methacrylate 
Explanation: Vertebroplasty and kyphoplasty are interventional radiologic procedures for the treatment of the intense pain refractory to medical management or bracing caused by vertebral compression fracture associated with osteoporosis, tumors, and trauma.
Vertebroplasty and kyphoplasty involve intraosseous injection of acrylic cement- polymethyl methacrylate under local anesthesia and fluoroscopic guidance.