Full knee replacement operation

My mother went for knee replacement operation at NUH by one of the ambitious and young orthopedic doctor. He was also the head of the department. Since then, he has left NUH for private practice.
as he was new to the position and did not have much practical experience, he called for full knee replacement operation.
i was opposed to the operation, but he has persuaded our mother to do it. and she agreed to do it.

i should have asked for second opinion, but did not. i asked sister and she also agreed mother to do the operation.

few years, our mother found her operated leg was much longer than the normal one and she walked with a limp.