Diagnosis:
In health, two types of tissue surround teeth: gingiva and mucosa. Gingiva is the more fibrous tissue that adheres to the roots of teeth. Mucosa is like cheek tissue, and does not adhere to the roots of teeth as well. If mucosa is the only gum tissue adhering to the roots of the teeth, it is much more likely to recede, causing more root to show.
After an examination, my doctor has advised me that I have an insufficient amount of attached gingiva (firm gum tissue) around some teeth. It is important to have sufficient width of firm, adhered gingiva to the roots of the teeth to withstand the irritation and resist recession. Gingiva (firm gum tissue) also improves the appearance and protects the roots of the teeth.