Well, the chances of recovery with a surgery following a radiculopathy depend on a few factors such as severity, chronicity, type of surgery, presence of other comorbidities/ other complicating factors etc. The improvement may not be sudden but may take some time. However if there are no signs of improvement in the first 3-6 months, it is unlikely to improve. Management in such cases may involve occupational therapy/ physiotherapy, use of orthotic devices, functional electric stimulation etc. You may like to discuss the feasible options with your treating orthopedician.
Hope this is helpful.