Oxidative differentiation in temporary anchoring devices made by Ti6Al4V and 316L steel – a pilot study

Vol. 14 – Number 53 – 2021 Original article Page 80-84 Oxidative differentiation in temporary anchoring devices made by Ti6Al4V and 316L steel – a pilot study Thiago Oszika Picolo¹ Micheline Sandini Trentin¹ Ricardo Kochenborger¹ Luiz Eduardo da Silva¹ Marcelo Baltoré Ferraz¹ Eduardo Grigolo Patussi¹ Abstract The aim of this pilot study was to test the hypothesis that temporary anchoring devices (TADs) made of 316L steel are more resistant to corrosion even in fluorine environment than DATs manufactured in addition to titanium alloys, for this Potentiostat electrochemical measurements were performed. Materials and Methods: Four pieces of each material were tested in each test set, an application of Fusayama artificial saliva was used as an electrolytic solution in this study of in vitro corrosion, without fluorine in its composition and in a second moment with 1500ppM of fluorine in its composition. In the test, a cathodic polarization was performed by increasing this voltage for 5 minutes or until the corrosion pins were obtained. In artificial saliva containing up to 1500ppmF- this test was repeated with new samples of each material in artificial saliva solution without fluorine. Results: The results of the induction current scale were inserted into OriginPro8 software for making value graphs. As there was a small number of samples, in order not to violate the study’s reliability no statistical test was performed. Among all metal alloys currently used the Ti6Al4V alloy showed good resistance to corrosion in artificial saliva. However, the corrosion of these alloys occurs in contact with high fluorine concentration, unlike 316L steel alloy, which in addition to corrosion makes surface passivation. Descriptors: Corrosion, mini-implant, orthodontic appliances, orthodontic anchorage procedure. ¹ Specialization in Orthodontics – UPF. DOI: 10.24077/2021;1453-8084