Evaluation of the resistance to traction of orthodontic devices - bracket, bouton and frame - bonded in premolar with autopolimerizable resin. “in vitro” study

Walter Leal de MOURA, Thaís Cristina Araújo MOREIRA, João Batista Mendes TELES

Restrained is the tooth which, reached its physiological moment of eruption, shows some obstruction to accomplish it. The treatment, with orthodontic-surgical involvement, type drives at to dislocate the dental element for right position in the dental arch, without to cause damages for adjacent dental element, re-establishing the aesthetics and function. Therefore, the direct bonding of orthodontic bracket and bouton for retained teeth traction became the preferred technic for, besides more clear, it demands smaller surgical amplitude and tissue removal to grant access to the dental crown. The research intended analyse the intensity of applied force to the entirety teeth/device/tie-wire, tractioning through, and to observe the splot rupture. Maked use of 45 premolar, conserved in 0.9%¹ physiological serum, that was divided into three groups (15 with brackets, 15 with boutons and 15 with frames). The tooth was illed in PVC pipe illed with acrylic resin and the devices was bonded to the teeth with autopolimerizable resin. After the bonding realization of the orthodontic devices, the tooth was be preserved in physiological serum and the tests was be realized after 72 hours of the bonding by means of a computer program. The bracket endured to medium force of 36,0N, being the junction wiredevice the spot less resistant; the bouton endured to medium force of 41,2N, the juncion wire-bouton was the plot less resistant and the frame was endured to medium force of 28,8N, being the junction teeth/frame the plot less resistant.

Keywords: Tractioning. Restrainment. Canine restrainmed.

Saturday, December 28, 2024 22:51