The utility model relates to a reamer structure for maxillary sinus augmentation, which comprises a bone positioning sleeve, a water pressure hollow reamer, a connecting conduit and a syringe； the bone positioning sleeve is fixed on the bone hole preset for the alveolar bone, the water pressure hollow reamer is screwed into the bone positioning sleeve by the front end, the syringe is equipped with physiological salt water, which is connected with the tail of the water pressure hollow reamer through the connecting conduit. Through extruding the syringe, the water pressure can be formed inside the water pressure hollow reamer.The hollow hydraulic reamer gradually cuts through the alveolar bone by the way of screw in. When breaking through the alveolar bone, the hydraulic pressure immediately peels and bulges the mucosa of the maxillary sinus upward to avoid the injury of the surgical instrument to the mucosa of the maxillary sinus, so that the operation process can achieve a better purpose of quiet, efficient, smooth and safe.一種用於上顎竇增高術之鉸刀結構，包含一骨質定位套筒、一水壓中空鉸刀、一連通導管及一注射器；該骨質定位套筒係旋固於齒槽骨預設的骨孔上，該水壓中空鉸刀係由前端螺入該骨質定位套筒中，該注射器裝有生理食鹽水，經由連通導管連通於水壓中空鉸刀尾端，透過擠壓注射器，可在該水壓中空鉸刀內部形成水壓。水壓中空鉸刀以旋進方式逐漸鑿穿齒槽骨，當突破齒槽骨的同時，水壓立即將上顎竇黏膜向上方剝離膨起，避免手術器械傷到上顎竇黏膜，令手術過程能達到安靜、高效、流暢、安全的較佳目的。
