Is there any chances of serious consequences like post traumatic arthiritis after wrist fracture if fracture healed satisfactorily in a correct positn?

Yes and no: Some people feel completely without any residual. However even though the fracture heals there maybe other ligamentous damaged that you can't see very well. To answer this question depends on the individual, their usual activity, their line of work, so before you can make a blanket statements, is important that you follow the rehab program that's been outlined for you.