Araujo and Lindhe described the edentulous ridge profile alterations following tooth extraction in an experimental study in a dog model. During the first week of post-extraction healing, the socket area is occupied by coagulum and granulation tissue. A large number of osteoclasts are seen on the outer as well as on the inner surfaces of the buccal and lingual bone walls. The presence of osteoclasts on the inner surface of the socket walls indicates that the bundle bone resorption has been initiated.