Under what circumstances can dental implants not be done?

These two cases are not allowed to do dental implants: 1. If the bone mass around the implant is not enough, immediate implantation cannot be done in time. After some bone powder is implanted for bone guided regeneration, it can only be implanted after meeting the requirements of implantation;2. Patients with severe periodontal disease cannot do dental implants. Periodontal treatment methods should be used to treat periodontal disease. Some treatment designs can be carried out only after healing.