Unfortunately there is not much you can do to recover lost gingival tissue outside of a clinical setting.
Loss of gingival tissue is due to 1.) periodontal disease or 2.) brushing to hard and too frequently (excessive abrasion). Out of those two options, number 1 is the most common.
If you have receding gums from inadequate dental care, I recommend you do the following:
- Brush your teeth three times a day. Particularly after a sugar or carbohydrate containing meal.
- Reduce total sugar intake. Sugar and carbohydrate of any kind (which is broken down into sugars) feed bacteria and correlate strongly to dental carries and periodontal disease.
- Floss in the evenings. Make sure to practice correct flossing technique.
- Use an antibacterial mouthwash in the evenings.
A routine such as this may seem excessive, but is at best preventative and cannot always stop or reverse existing damage. For this reason, I suggest you also do the following:
- See a dentist for regular teeth cleaning. Every 6 months.
- If your gums are receding, chances are you will need root planing and scaling to prevent further recession. A dental hygeinist will take gum pocket depths and determine if this procedure is required. Your dentist may also give you antibiotics to eliminate any remaining bacterial infection.
- Once your gums are no longer infected, to restore lost tissue you will likely need a gum graft to restore the appearance of your gums and prevent further infection from eating away at the exposed roots of your teeth.
Anyways, that is pretty standard procedure. Can you tell my girlfriend's brother is a dentist?
I think I have learned more than I ever wanted to about dental hygeine.