Director James Mangold's 2013 film The Wolverine set a new precedent for the fan-favorite X-Man when the Silver Samurai cut off his Adamantium claws. Although Logan regrew bone claws, the Adamantium ones wouldn't be restored until X-Men: Days of Future Past was released the following year. But how did the iconic claws return to a character who has no way to grow his own?
Source:https://www.cbr.com/x-men-days-of-future-past-how-wolverine-got-adamantium-claws/