The surgical treatment of Macrostomia or a large mouth is extremely complicated as the scarring is difficult to hide and a certain amount of "largeness" is considered attractive. A true macrostomia repair recreates oral muscle circle around the mouth closing the size by bringing the corner of the mouth inward. Your muscle sling is complete and your lips are full making the standard macrostomia repair ineffective. The answer to your question is no. But there are other ways of decreasing the mouth size that can be addressed by a Plastic Surgeon with this kind of lip reconstruction experience.