Surface Morphology And Corrosion Resistance Of Preformed Stainless Steel Crowns Evaluated Using Scanning Electron Microscopy (SEM) - An In Vitro Study

The paper deals with the corrosion behaviour and surface morphology of two commercial brands of crowns named 3M crowns and Kids crown using Scanning electron microscope (SEM). Ten stainless steel crowns of the first primary mandibular molar of size 6 of two commercial brands named Kids crown (Shinhung, Seoul, Korea) and 3M Stainless Steel Primary Molar Crowns(3M ESPE, St. Paul, MN, USA) were used in the study. Surface morphology was analyzed using SEM measuring 20 × 20 microns and at a magnification of 4000x and corrosion resistance was analyzed using anode polarization test. Visual examinations of exposed surfaces were performed and metallographic sections of U-bend specimens were carried out in order to assess stress corrosion cracking. From the study results, Kids crown was comparatively better than 3M crowns on testing for surface morphology and Corrosion resistance. Further antimicrobial tests and wear resistance should be tested for finalizing the study results.