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: Dental
[{'content': 'Bone can be induced to grow at surgically created sites by the method called \nSelect and explain. \nA. Osteogenesis, B. Distraction osteogenesis, C. Bone wax, D. Green stick fracture', 'role': 'user'}, {'content': "Answer: B \nExplanation: Distraction osteogenesis: \n\nDistraction osteogenesis is the method of inducing bone to grow at surgically created sites.\nRussian Surgeon Ilizarov discovered in 1950's that if cuts were made through the cortex of a long bone of the limbs, the arm or leg then could be lengthened by tension to separate bony segments.\nCurrently it is believed that best results are obtained if this type of distraction starts after a few days of initial healing and callus formation and if the segments are separated at a rate of 0.5 — 1.5 mm/ day.\nAlso this technique is employed for Lengthening of mandible and inducing maxillary growth by separating cranial and facial bone at their sutures.", 'role': 'assistant'}]