Abstract: A spinal alignment correction system (1) has a posted lumbar pedicle screw called a MAC Pin (10) which has an elongated shaft (11) and a rod coupler assembly (20) and a cannulated tower (40). The elongated shaft (11) has an inner pedicle screw portion (12) with pedicle threads (12A), an outer second thread portion (14) with second threads (14A) and a transition or intermediate portion (16) disposed between the pedicle screw portion (12) and the second thread portion (14). The cannulated tower (40) when mounted over said elongated shaft (11) abuts said coupler (20) along an outer cam surface and further tightening rotation of the cannulated tower (40) causes outward movement of the elongated shaft (11). The system (1) allows for a controlled alignment correction of malaligned vertebral bodies using a number of methods used to correct a variety of indications.

Abstract: An improved wood threader that utilizes an aluminum plate as a router mounting base to which a mounting block, that may conveniently be wood, is attached, and to which interchangeable, machined, high-performance plastic threader inserts are attached with an indexing means that assures that each insert will be accurately positioned relative to a router bit or cutter.