India, Sept. 19 -- Imagine undergoing a total knee replacement in the afternoon and walking out of the hospital the very next morning, or even the same evening, unassisted and ready to resume your daily life. For former Army Chief General JJ Singh, 83, this isn't a high-tech fantasy; it's his recent reality.

Just a day after surviving a mid-air engine failure on a flight from Goa to Delhi, the veteran walked into the operation theatre for a robotic-assisted total knee replacement (TKR) on his right knee. Within hours of the procedure, he was walking without support. Days later, he was back on the green, swinging his golf club and sending updates to his surgeon, Dr Rajeev K Sharma, chairman, orthopaedics & chief robotic surgeon, Moolchand...