Evaluation of Nickel and Titanium Releasing from Titanium-coated Stainless Steel Crowns Regarding Trimming: An In Vitro Study

Materials a n d MethodsA total of 60 titanium-coated SSCs (Kids Golden Crowns, Shinhung Company, Korea) were used in the study.The titanium-coated SSCs were divided into two study groups-group I-without trim (30 crowns) and group II-with trim (30 crowns).Before trimming the group II samples, a marker was used to draw a line at a distance of 1 mm from the crown margin.Each crown was cut using specialized scissors designed for cutting crowns (K-crown scissors curved, Shinhung Company, Japan).The cut margins were then trimmed using a heatless stone bur and polished using a rubber wheel.Thirty crowns from each study group were placed in centrifuge tubes containing 5 mL artificial saliva in a plastic introduction Caries is one of the most frequently seen problems in children.Stainless steel crowns (SSCs) are the most efficient way of restoring primary molars. 1 Attention to the adverse effects of dental materials used in dentistry, especially metals, has been a major concern of recent studies. 2,3Nickel (Ni) is one of the common components used in SSCs.There isn't much research that discusses how saliva acts as a mediator and electrogalvanic current to release metal ions from SSCs. 1 Nickel has long been known as one of the causes of allergy and sensitivity 4 and is the most common cause of allergic reactions like contact dermatitis. 5Titanium is considered the most biocompatible due to its corrosion resistance.However, there are studies that show the release of titanium ions in saliva. 6refabricated crowns do require trimming and adaptation to the underlying teeth, as the crown margin may interfere with crown seating or cause blanching of the marginal gingiva. 1 According to our theory, crown trimming may have an impact on the release of titanium and Ni and may even reach a critical level due to disruption of the integrity.Titanium-coated SSCs are newer on the market, and very little research has been done on the ions released from these crowns, such as titanium and Ni.Therefore, the amount of titanium and Ni ions emitted from titanium-coated SSCs both with and without trim will be measured in this study using artificial saliva.