Effect of Coffee against Stainless steel Orthodontic Bracket
Himawan Halim,1,* Magdalena Juliani,1 Fajar H Nasution,1 Ivan A Halim,2 Rafael J Irwantoro3

Universitas TYrisakti

Abstract

Introduction: Indonesia is the fourth largest coffee producer in the world. In Indonesia there are 3 types of coffee grown, namely Arabica coffee, Robusta coffee and Liberica coffee. In Indonesia, Robusta coffee is the most widely produced coffee. Robusta coffee is an acidic drink because it has an average pH of 5.6 which can increase corrosion. Stainless steel orthodontic brackets are a type of orthodontic bracket that has greater resistance to corrosion, however, exposure to stainless steel orthodontic brackets by Robusta coffee which has an average pH of 5.6 can cause a corrosion process so that more Fe ions are released. Objective: To see the number of Fe ions released from brackets soaked in Robusta coffee. Method: the study was divided into two groups, namely control and treatment groups. In the control group, there were 16 stainless steel orthodontic brackets which were soaked in 20 ml of artificial saliva in an incubator at 370C for 24 hours. In the treatment group there were 16 stainless steel orthodontic brackets which were soaked in 10 ml of artificial saliva and 10 ml of Robusta coffee in an incubator at 370C for 24 hours. After that, testing was carried out using an AAS tool to see the release of Fe ions contained in the test solution. Results: Robusta coffee causes increased release of Fe ions in stainless steel orthodontic brackets. In the treatment group soaked in Robusta coffee, an average of 7.96 ppm of Fe ions were released, while in the control group there were only 4.07 ppm of Fe ions released. Conclusion: Robusta coffee has been proven to cause increased release of Fe ions in stainless steel orthodontic brackets.

Keywords: robusta coffee, stainless steel bracket, ion Fe

Topic: Orthodontics and Dentofacial Orthopaedics