Fluted osteotome and surgical method for use

摘要

A surgical method and tool for expanding an initial osteotomy (42) to receive a bone implant (44). An osteotome (22) having a tapered working end (28) is inserted into the initial osteotomy (42). The initial osteotomy (42) is enlarged by simultaneously rotating and pushing the working end (28) of the tapered osteotome (22) into the osteotomy (42). When rotated in one direction the burnishing edges (40) concentrate the pushing and rotational force in outward normal and tangential component forces against the interior surface of the osteotomy (42) to incrementally expand the osteotomy (42) with little to no removal of bone material (46). When rotated in the opposite direction the burnishing edges cut the interior surface of the osteotomy. Progressively larger tapered osteotomes (22) are used until an osteotomy (42) of predetermined size is achieved.

主权项

1. A low-impact surgical method for expanding an osteotomy using high-speed rotation, said method comprising the steps of:
providing a rotary osteotome having a tapered working end, the working end having a plurality of longitudinally extending burnishing edges; positioning the tapered working end of the osteotome over an open end of an osteotomy, the osteotomy having an interior surface surrounded by bone; rotating the working end of the osteotome at high speed; and enlarging the osteotomy by axially bouncing the rotating working end within the osteotomy so that the burnishing edges lap against the bone interior surface with downward motion and separate from the interior surface with upward motion in ever deepening movements that cause a progressive plastic deformation of the bone interior surface beginning adjacent the open end and developing downwardly into the osteotomy.