MEDICAL SCREW AND METHOD OF INSTALLATION

摘要

A medical screw (100) includes a shaft (102) having a threaded portion (106) and a distal guiding tip (108) for introducing the screw (100) into a pre- drilled implantation site. The threaded portion (106) of the medical screw (100) has a first series of helical threads (114) having a first diameter an d a second series (116) of helical threads interleaved with the first series o f helical threads and having a second diameter, where the first diameter is different than the second diameter. In addition, the medical screw (100) may have a counter-rotation channel (402) configured to receive bone growth.