抄録
Patients with loss of molar teeth in upper jaw often exhibit restricted endosseous implant due to insufficient vertical bone mass to secure implant between the floor of maxillary sinus and the top of alveolar bone.
Endosseous implant in patients without sufficient vertical bone mass is generally carried out by embedding granules or block of hydroxyapatite, or reconstruction of bone in maxillary sinus floor. However, these methods require considerable surgical invasions and their prognosis have not been thoroughly evaluated1).
A simple small-scale technique with less surgical invasion was tried by hammering the formed channel floor or drilled floor of hole to make a hypostosis without injuring mucosa of the sinus floor. The floor was lifted, and the resultant space was filled with crushed deciduous teeth or hydroxyapatite granules to secure the vertical bone mass. Then a fixture was embedded in the bone mass. During the procedure, several interesting findings were observed.
