Wolverine's claws can come back due to a combination of factors like his mutant abilities reaching a new peak or a scientific experiment gone right. Different comics offer different explanations for this.
Wolverine's claws come back in the comics because of his inherent mutant physiology. His healing factor works to repair and regrow them. Sometimes, specific story arcs introduce elements that facilitate or accelerate this process.
Well, it happened through a complex series of events and encounters. Sometimes it was due to advanced technology or a special intervention by other characters.
The origin of Wolverine's claws in the comics is tied to his mutant genetics. It's an inherent ability that manifests when he wants to use them for protection or combat.
In some comic storylines, Wolverine gets his adamantium back through complex and unexpected circumstances involving advanced technology or powerful allies.
Wolverine does get his adamantium back in specific comic storylines. This often occurs after intense battles and adventures that lead to his restoration of this key attribute.