yes it happens but surgery will not be a major one It will be a minor one and not much complications. Also depends on which teeth it will be done and x ray is a must.

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

It seems you are suffering from a toothache that is leading to a cavity, which is a very frequent dental problem. This issue is caused by the decay of a tooth that is mainly due to bacteria. Symptoms like pain are the signals that might indicate the condition needs attention. Then the dentist will identify the area of decay and manage it with a filling or, in case of severe damage, a root canal. Along with taking care of the teeth by brushing and flossing daily, oral hygiene can help you stay healthy and away from other problems. Therefore, the treatment by a doctor will help you get the best way to your full recovery and also make your tooth comfortable to live with.

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. 

Teeth cleaning costs differ with various factors one of them is the dental clinic location. It is advisable to visit the trusted dentist in order to get the correct diagnosis of the dental conditions and related costs.