Patent ID: 8075564

Claim:
A piezo ultrasonic surgery unit for lifting a maxillary sinus of a patient via vertical approaching, comprising: a piezo main unit; a hand piece connected to said piezo main unit; a piezo body having a first end and a second end, wherein said first end is configured and dimensioned to be fixedly inserted into said hand piece of said piezo main unit; a piezo pole having an outer face, a first end and a second end, said first end being connected to and extending from said second end of said piezo body; a piezo tip provided on said second end of said piezo pole, said piezo tip having a plurality of cutting blades arranged at regular intervals thereon which define spaces therebetween, wherein said plurality of cutting blades each have a curved outer surface, and wherein said cutting blades collectively form the general shape of a hemisphere in which respective ends of said cutting blades converge towards a hemispherical pole and define a leading end of said piezo tip; a stopper protruding from said outer face of said piezo pole positioned to restrict the depth of insertion of said piezo tip into a patient, depending on a predetermined thickness of remaining bone; and wherein each of said piezo body, piezo pole, and piezo tip have a water supply channel passing through the center of each which are in fluid communication and allow water jetted therethrough to exit from said channel and, ultimately, from said piezo tip to ensure continuous, safe lifting of the maxillary sinus of the patient to prevent damage thereto during surgery.