The specialized ridge of the upper (maxilla) and lower (mandible) jaw bone that contains the tooth sockets and supports the teeth.
This bone relies on stimulation from chewing to stay healthy. When you lose a tooth, the alveolar bone begins to melt away (resorb), which can make your face look older and make placing implants difficult later.
Soft tissue heals in 2-3 weeks; bone filling the socket takes 3-4 months.
Yes, through a procedure called guided bone regeneration (bone grafting).