Mechanics with Two Archwires for Molar Intrusion Mechanics with Two Archwires for Molar Intrusion

The use of orthodontics mechanical intrusion, although frequent, is still considered complex. Trying to annul reactive or undesirable effects in the dental intrusion, new techniques have been developed in order to optimize the clinical results. The purpose of this article is to report the resolution of a first molar maxillary extrusion case through mechanical intrusion, using the Double Slot self-ligating appliance. The mechanics were performed in a simple way, without the presence of extra devices, with satisfactory clinical results and absence of the tooth support structures damage.

One of the major challenges that orthodontists face in adult patients is the restoration of occlusion in cases where tooth loss has occurred. The loss of a mandibular molar, in the long run, can cause the angulation and rotation of its adjacent ones. The antagonist tends to extrude into the remaining space, causing damage to the support structures and great difficulties in prosthetic reconstructions.⁷

Dental intrusion is considered within orthodontics as one of the most difficult movements to obtain. The complexity of the movement in question is based on the attention that the professional must have in relation to some specific aspects, such as: magnitude of the force, choice of the anchoring unit, application of the force point and control of the movement of the tooth to be intruded. Thus, ensuring correct movement without undesirable movements.⁴