A COMPARATIVE EVALUATION OF CYTOTOXICITY AND COROSSION RESISTANCE BETWEEN TITANIUM AND STAINLESS STEEL ORTHODONTIC MINI IMPLANTS - AN IN VITRO STUDY.

Tahreem Chaudhary*

Abstract

Background: Micro-implants made from metals, have been developed and modified to apply to many of the orthodontic situations one of which is absolute anchorage. The continuous use of metals in oral cavity has led to a great number of laboratory and clinical studies on the damaging effects of this products to person’s general health. Owing to this, it is must to rule out the best mini-implant with least cytotoxicity and high corrosion resistance. Thus the aim of this in-vitro study was to evaluate and compare the cytotoxicity and corrosion resistance of Titanium and Stainless steel Orthodontic mini-implants. Method: The sample comprised of 20 mini-implants which were divided into 4 groups, each group consisted of 5 mini-implants.2 groups of Titanium mini-implant and 2 groups of Stainless Steel mini-implant. Subsequently, each sample was submerged in artificial saliva for 60 and 90 days, at 37C. After this, saliva with the mini-implant corrosive product extracts were evaluated for cytotoxicity and the mini-implants were tested for corrosion resistance. Result: In intergroup comparison for cytotoxicity, significant values seen with Orlus mini-implants and least significant values with Favanchor mini-implants. Whereas, for corrosion resistance, a highly significant difference seen for values between all the 4 mini-implants with higher values in Favanchor mini-implants. Conclusion: There was a highly significant difference for all the 4 mini-implants, with least cytotoxicity seen in Titanium mini-implants than Stainless Steel mini-implants. Mini-implants of all the 4 groups exhibited good corrosion resistance, with comparatively high corrosion resistance seen in Titanium mini-implants than Stainless Steel mini-implants.