Method of and apparatus for ligating orthodontic appliances
Patent 6309214 Issued on October 30, 2001. Estimated Expiration Date: January 19, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
A ligature for securing an orthodontic bracket to an orthodontic archwire is formed from nylon and comprises a thin, elongate member having sufficient tensile strength to withstand orthodontic forces. A locking member receives the ligature therethrough and prevents disengagement of the ligature from an orthodontic bracket and an orthodontic archwire following installation. In one embodiment the ligature has locking teeth at one end and a locking member at the other end for cooperation with the locking teeth to prevent disengagement of the ligature. In another embodiment the ligature has locking teeth at both ends which engage one another and a locking tube to prevent disengagement of the ligature. In another embodiment the locking member is initially open and is closable to secure the ligature therein, thereby preventing disengagement of the ligature from an orthodontic bracket and an orthodontic archwire following installation.