Determination of Microelements from Orthodontic Implants by the Flame Atomic Absorption Spectroscopy Method

Orthodontic miniscrews gained popularity in the last decade due to the possibility of reduced treatment time, low cost, small dimensions and low morbidity rate. Absolute anchorage with no dental side effects make orthodontic mini implants an attractive choice for orthodontists. Although these advantages provide optimal clinical solutions, some characteristics must be taken into account when choosing the type of the mini implants. The chemical composition is one of the most important factors that can lead to either success or failure of the orthodontic treatment. In order to prevent fracture, corrosion and toxicity, certain metal alloys must be used in the manufacturing process of the miniscrews. The microelements from Leone orthodontic implants were investigated in this study by the flame atomic absorption spectroscopy method. The sample was immersed in aqua regia (3 parts HCl and one part HNO3). After sample dissolution 50 mL were taken for analysis. The microelements were determined by AAS (Varian 220 FAA equipment). Mix standard solutions (ICP Multielement Standard solution IV CertiPUR) were purchased from Merck. All tests were run in triplicates.