Hi, I had gone through your question and understand your concerns. I think during or after the procedure, the infraorbital nerve, which is the main branch of the maxillary nerve has been affected. First you should consult the surgeon who performed the procedure to assure you that the approach he used did not interfere with this nerve. A second cause would be from the post operative swelling which may have compressed the nerve. Three months is not the deadline for a nerve to recover, which may take even two to three years to fully recover. I recommend you to consult your surgeon first and then follow the next steps. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.