Indications for the sinus graft
Local conditions of the edentulous alveolar ridge, such as loss of alveolar bone height as a result of periodontal disease prior to tooth loss, can make implant placement unfavorable. Distal furcation of the maxillary molar frequently leads to bone loss bacause of facial or palatal inaccessibility for hygiene purpose. Because it is narrow, it is also difficult to currettage the furca to eliminate calculus. Consequently, periodontal disease progresses and the resulting loss of bone height leads to tooth loss.
(to be continued...)