Pengaruh Lama Perendaman Kawat Ortodonti Stainless Steel dalam Ekstrak Etanol Daun Afrika (Vernonia amygdalina Delile) terhadap Perubahan Laju Korosi

Abstract

The high prevalence of malocclusion increases the need for orthodontic treatment. Wire part of fixed orthodontic treatment. Stainless steel wire is one of the wires that is often used in orthodontic treatment. The purpose of this study is to see the ability of ethanol extract of African leaves (Vernonia Amygdalina Delile) in inhibiting the corrosion rate of stainless steel wire after soaking. This type of research is laboratory experimental. The research samples were 0.016 x 0.022 inch 3 cm registered and unregistered stainless steel wire, immersed in 0.2% chlorhexidine, artificial saliva, 3.125 mg/ml and 6.25 mg/ml African leaf ethanol extract for 7 and 14 days at 3-Wallis test results showed a difference in the corrosion rate of registered and unregistered wires on the 7th and 14th days in each treatment group. Mann-Whitney test results there is an effect of soaking time on the difference in corrosion rates in each treatment group. It is concluded that there is an effect of soaking time on the corrosion rate of registered and unregistered stainless steel wires immersed for 7 and 14 days in 0.2% chlorhexidine, artificial saliva, 3.125 mg/ml and 6.25 mg/ml African leaf ethanol extracts.