Comparação do nível de força ortodôntica através de rede de fibra óptica de bragg durante a retração dentária

Abstract

Introduction:Bragg fiber (FB) has been a sensitive, sterile and precise option in Dentistry. It is based on the emission of wavelengths, which are transformed into force measurements and can be used to measure different orthodontic mechanics. Methodology: Using a photoelastic model of the maxilla with the absence of first premolars, FB sensors were applied to the coronal region of the canine teeth, second premolar and first molar on the left side of the maxilla associated with the fixed orthodontic appliance and mini-implant.Then, retraction mechanics were applied using a chain elastic and nickel-titanium (NiTi) spring. Using the optical spectrum analyzer (OSA), measurements were obtained with the variation of wavelengths. The retraction force was also measured with a digital tensiometer in a omparative way. Result: Changes were observed in most spectra after the application of retraction forces, with magnitudes varying from 0.54 to 6.75 N. Variations in wavelengths (λ) were also noted when evaluating the Bragg fibers. Conclusion: The results obtained reinforce the effectiveness of NiTi springs in providing more controlled and less traumatic tooth movement.