Dinamômetro tracionador de dispositivos dentários / Dental Apploances tensile dynamometer

RESUMO

A dental appliances tensile dynamometer was developed remove direct bonded orthodontic brackets from the tooth, without necessity of extracting this late; this means that the essay is realized with the dental organ resting in its alveolus of a living patient. The apparatus basically consists of a metalic tube, containing a fixed blade (or a S-like structure) tied to a metalic wire. When the wire is conected to the bracket, the dynamometer is pulled, the blade is submitted to a tensile effort which is dected by two extensometers that send electric pulses to a plotter or to a micro-computer, already calibrated to quantify the traction force value necessary to remove the bracket. It is possible to use this dynamometer in many other situations, as to verify the bond strength of dental adhesives to the various dental tissues, or to quantify the necessary force to extract a teeth from is socket