Steve Hansen has offered a positive update on Brodie Retallick

All Blacks head coach Steve Hansen believes there is a "good possibility" Brodie Retallick will be fit for the Rugby World Cup despite the lock dislocating his shoulder on Saturday.

Retallick came off in the second half of New Zealand's 16-16 draw against South Africa in the Rugby Championship.

It sparked fears Retallick could miss the World Cup, which begins in Japan in September, but Hansen was more optimistic on Sunday.

"He's only dislocated it, which means that there's a good possibility he could make the World Cup," a relieved Hansen told a news conference.

"No timeline yet to when he's going to return to play, but hopefully he'll be available to go to the World Cup."

Shoulder dislocations generally require 12 to 16 weeks of recuperation meaning Retallick wouldn’t make an appearance for the All Blacks until later in the tournament.