This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal Injuries, Subject name: Orthopaedics
Substance that is used for vertebroplasty is: 
Select and explain. 
A. Polymethyl methacrylate, B. Polyethyl methacrylate, C. Polymethyl ethacrylate, D. Polyethyl ethacrylate
A: Polymethyl methacrylate
Answer: A: Polymethyl methacrylate 
Explanation: (a) Polymethyl methacrylate- 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.