Bone cutting osteotome tool and method for preparing a surgical sinus-lift osteotomy
A surgical tool for preparing a surgical sinus-lift osteotomy has a defined thread geometry in series with an osteotome tip to cut, crack and push bone from the sinus floor upward into the sinus cavity in a tactual, gentle and controlled motion. The apical osteotome tip is driven into a pre-drilled pilot osteotomy after the cutting threads are engaged and rotated until the sinus floor is cracked free. Once the bony sinus floor is cracked free, a fluid passageway can be pressurized with a sterile fluid at a defined pressure to release and push the sinus membrane upward into the sinus cavity to create a desired apical cavity for grafting while minimizing the risk of compromising or tearing the sinus membrane.
1. A method for preparing a surgical sinus-lift osteotomy comprising the steps of:
forming a cylindrical pilot hole having a diameter and a longitudinal axis in the maxillary bone in alignment with the sinus floor,
taking a tool having a continuous sharp circular cutting edge having a diameter the same as the diameter of the pilot hole and having an axially extending opening and placing said circular cutting edge in the pilot hole in an orientation so that the circular cutting edge lies in a plane perpendicular to the longitudinal axis,
while maintaining said orientation, moving the circular cutting edge in a helical motion toward and into engagement with the sinus floor until the sinus floor is cut and cracked, and,
while maintaining the circular cutting edge within the pilot hole, delivering sterile fluid through the said axially extending opening at a selected pressure and maintaining the delivered fluid at the selected pressure to release and push the sinus membrane into the sinus cavity.
2. A method according to claim 1 further comprising the step of moving the circular cutting edge by use of a bone thread.