Nah, dude. That injury was supposed to take two years to heal up if it were an ordinary person, which Zoro is not. Zoro's regenerative ability is much better than normal. Just see the difference between his condition in Arlong Park and his condition in Alabasta; That's the difference between when the injury was not healed up yet, and when it was already healed up.
The same goes for his self-inflicted injury on his legs when they faced Mr.3. Realistically speaking that was supposed to nerf Zoro a lot more as a fighter than Mihawk's injury, considering how he went half through cutting them off, and such injury is a lot more critical in terms of reducing the strength of a fighter than some big cut on the front of one's torso, since the legs are the support of the rest of the body. But Zoro was able to have that healed up very fast.