He also missed 11 months of football back in 2011 because of anterior cruciate ligament problem in the same knee.
"To not be able to [play] for so long is going to be so tough, and to be honest it probably hasn't sunk in yet," a statement released via the Forest's official website read.
"But when you get the kind of support I have from fans, friends and family it makes the long road that little bit easier. It's an amazing feeling and it keeps me motivated."
Forest lose their captain placed fifth in the table, eight points adrift of the leading trio of Burnley, Leicester City and Queens Park Rangers.