Development of radiolucent biodegradable material for sinus floor bone augmentation

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The purpose of the present study was to develop a material, with which we can observe new bone formation in maxillary sinus bone augmentation. Bony window at the buccal side of posterior maxillawas opened and maxillary sinus membrane was elevated. The bio-resorbable plate (fixorb) was placedunder the sinus membrane and fixed to the bone close to the bony window. Six months after the surgerybone formation was radiologically observed. We radiologically examined 19 implants at 13 sites of 10patients, average age 62.2 years old, who received sinus lift without graft material. In all cases bone wasformed around the implants and sinusitis was not observed. Bone is formed when space is produced onthe bone surface. Thus, we developed a new device, with which we elevated the periosteum, producingnew bone on the head of the rabbit. Furthermore, when we completely covered this device with a siliconmembrane, all the space was filled with new bone. We named this new method "expansible GBR".