You write that the accident was 3 months ago, you do not write when the operation was done and how succesful it was. What does Wikipedia reference-linkMRI show? This is important because the accident might have caused a contusion but that doesn't mean this situation is still a fact after the operation. Why was an operation performed was a more conservative treatment not possible? Or was the situation life threatening?
An operation will cause a second injury (unfortunately) and this will effect the area of L1 in general, oedemia, built up of scar tissue and so on. Initially one will always have an improvement with or without treatment since the oedemia caused by both trauma's will decrease after lets say 2 weeks to a month. After that you will have the situation where you could say the improvement is purely due to treatment (to put it black and white). A problem occurs meanwhile since there will be a built up of scar tissue which will influence the space. So there are some issues you might have little influence on.
Your question though will there be a 100% recovery is hard to answer because it is to soon to say. You have to know more about the background, as I tried to ask you. Answer the questions above and you will be able to tell the chance of a 100% recovery. At this point I would say it is more like looking into a glassball and predicting the future.