ANCHOR APPARATUS AND METHOD FOR ORTHODONTIC APPLIANCES

摘要

An apparatus and method for anchoring orthodontic appliances or the like in the mouth wherein anchor screws of different constructions are installed in the bone in different areas of the mouth to insure adequate bone contact and retention. Each of the anchor screws has a threaded portion and a washer portion at the outer end of the threaded portion which is of sufficient wid th to engage the adjacent exterior bone surface when the threaded portion is installed in the bone to provide lateral support for the threaded portion. In some cases, the threaded portion is provided with threads of different si zes and the washer portion is provided with an exterior thread for cutting t hrough gum tissue to enable the washer portion to engage the underlying adja cent exterior bone surface when the- threaded portion is installed in the bo ne. Each anchor screw is provided with a lateral bore at the outer end there of for receiving a ligature or the like therethrough to prevent the anchor s crew from falling in the mouth.