Patent ID: 7717943

Claim:
A capless multiaxial screw fixation assembly comprising: a screw having a threaded portion and a screw head; an elongated member; a receiver having a bore for receiving said threaded portion and a first receiving channel for receiving said elongated member, said first receiving channel further comprising a locking channel in communication with said first receiving channel; a compression member for situating in said bore, said compression member having a first end and a second end and further comprising: a second receiving channel associated with said first end; and a seat area associated with said second end for receiving and engaging said screw head; said elongated member causes said compression member to move toward said screw head in said bore to lock said elongated member to said screw when said elongated member is received in said first and second receiving channels and said receiver is rotated from an unlocked position to a locked position; wherein when said receiver is rotated from said unlocked to said locked position, said elongated member and said compression member move in said bore so that they are closer to said screw head; wherein said receiver comprises at least one camming surface that cooperates with an opposing surface for defining said locking channel said at least one camming surface facilitates camming said elongated member to urge said compression member to apply a compressive force against said screw head.