"The operation is to keep everything in the right pace so the bone can heal".
"It's expected he's going to make a full recovery and be back playing", he said. "Once you remove the drama of it being a neck injury you've just got to look at it and treat it like any fracture".
Hansen said the All Blacks involved in the last two tests against the Pumas and Springboks wouldn't play in the national championship this week because of the travel demands they had endured.
The All Blacks face Australia in the third Bledisloe Cup clash in Yokohama on October 27 before they face Japan on November 3 in Tokyo.
Hansen revealed the All Blacks would take a squad of 32 to Japan but 19 players would leave Tokyo early for Britain with fitness coach Nick Gill.
This result has also denied the Boks their third Test win in succession and they will have to raise their game for the end of the year tour where they are up against England France, Scotland and Wales in Europe in November.