Abstract :
Aim: To investigate the colour, gloss, and surface roughness of Epoxy-coated, Rhodium-coated, Ceramic-coated, and Teflon-coated NiTi arch wires before and after brushing in a simulated oral environment.Materials and Methods: The sample group were categorized in to 4 groups based on different coatings. Group.1-Epoxy resin coated, Group.2- Rhodium coated, Group.3-Ceramic coated, Group.4-Teflon coated arch wires of 10 numbers each using sample size calculating formula for means and Baseline characteristics of arch wire i.e., gloss, colour and surface roughness were evaluated. Metallic brackets with .022” x .028” slot was bonded to the acrylic teeth portion of typhodont model and arch wires were ligated to the bracket assembly. Then the acrylic teeth portion of the typhodont along with the bracket-arch wire assembly was immersed in to the container with artificial saliva. 2 minutes of brushing was done twice daily with Colgate powered electrical toothbrush and Colgate tooth paste for 30 days and after that the arch wires were removed from the typhodont model and post brushing characteristics were evaluated. Gloss of the arch wires was measured by glossmeter. Spectrophotometer was used to determine the colour. Surface roughness was evaluated using scanning electron microscopy.Results: The study revealed statistically significant differences between the groups (p < 0.05). Teflon-coated archwires exhibited the highest color stability, while Ceramic-coated archwires showed the least. Teflon-coated archwires also demonstrated the least loss of gloss, whereas Rhodium-coated archwires exhibited the highest gloss loss. In terms of surface roughness, Rhodium-coated archwires had the least roughness, with Ceramic-coated archwires displaying the highest roughnessConclusion: Teflon-coated archwires performed the best in terms of color stability and gloss retention, while Rhodium-coated archwires exhibited minimal surface roughness after brushing
Keyword :
Epoxy coated archwires, Rhodium coated archwires, Ceramic coated archwires, Teflon coated archwires, Surface roughness, Gloss, Color stability