To get back the enamel you need to Brush regularly using flouridated paste, Intake of calcium rich foods and intake of vitamin D.

Should you be on a Gramocel o 200 course of two doses, make sure to take the exact number of doses prescribed by your doctor . Gramocel o 200 is used for the treatment of infections that are caused by bacteria. You need to take the medicine in the exact way that the doctor ordered to get it working properly. Always complete the full course of treatment even if you feel better. 

Bruising around neck common after wisdom tooth extraction . Usually harmless.. But if it persists seek medical attention.... Could indicate more serious injury.

It sounds like your teeth are going back to their original positions again. This is possible to happen in the case that you do not use your retainers according to the plan of your orthodontist. The deletion of the braces, and retainers are useful for keeping teeth in their new position. They are the ones responsible for the extraction of teeth which in turn migrate back. The first and the most important step to stop it would be to rank shifting to acutely wearing the retainer again. Be relaxed, talk to your orthodontist, and ask for instructions.

It is recommended that you consult with a maxillofacial surgeon to address any concerns related to jaw/chin surgery. Given your history of a past injury, it is important to thoroughly evaluate any anatomical changes to ensure that the desired outcome can be achieved. In order to determine the best course of action, a thorough consultation with a maxillofacial surgeon is recommended.

In a situation where your gums are receding, you must visit a periodontist to discover the leading cause of the problem. After solving the main cause, your doctor may discuss implants as a solution for you.