Is there a general guideline as to how long a patient should wait after gum and bone grafting until they can again start teeth bleaching at home?

Yes: As a general rule of thumb, it's always best to allow the tissues to heal thoroughly before any elective procedures are begun, especially tooth whitening which contains chemicals that can irritate the soft tissues. Since everyone heals at a different rate, there is not specific time... I would suggest your periodontist give you the go ahead to resume whitening.

Healing: You should rely on dentists who can actually examine you and evaluate your mouth to answer questions such as these. Healing should generally be complete by three months. That is not to say tooth whitening is right for you and has no precautions to take into account, nor after three months can we give you the green light, sight unseen. Ask the dentist who is treating you.

Be patient 28 days: Using a bleaching agent following periodontal surgery can delay or complicate the healing process. This is easily avoidable by waiting and adequate amount of time until all healing is complete. Periodontal surgeries involving alveolar bone take 28 days to heal completely.