Keeping Teeth— Teeth might become loose and at danger of loss when severe periodontal disease causes bone loss. To preserve them, the bone around them can be rebuilt by grafting, which enhances bone support and aids in keeping them in place. Throwing Out Teeth— Tooth removal is usually necessary for healthy teeth to remain intact. However, this cannot always be done successfully; if tissue is left behind, infection may result. In these cases, replacement teeth will need to be obtained from another source or the patient may have to make do without teeth.