Patent ID: 7837468

Claim:
A long-arm type upright molar tooth spring, for uprighting an impacted second molar tooth, comprising: a lingual groove rest, for securing one end of the tooth spring in at a lingual groove of a first molar tooth; a loop, adjacent to said lingual groove rest, having a length spanning from the lingual groove of the first molar tooth to a marginal distance below the highest point of the profile of the mesial side of the impacted second molar tooth, and a width spanning from the lingual side of the first molar tooth to the buccal side of the first molar tooth, wherein the loop includes a body having at least one contact end which extends to and directly contacts the wall of the impacted second molar tooth adjacent to the first molar tooth; a buccal bracket rest, adjacent to said loop, for resting the long-arm type upright molar tooth spring at a buccal bracket of the first molar tooth; a reactivating area, adjacent to said buccal bracket rest; a lever, adjacent to said reactivating area, for applying a force onto the second molar tooth; and an end arc, adjacent to said lever.