Effect of Resin Infiltrant versus Universal Adhesive on Microhardness of Acidic Challenged-White Spot Lesions (In-vitro Study)

Ibrahim, Noha H.; Elmarsafy, Sahar M.; Zaghloul, Samaa A.

doi:10.58675/2974-4164.1610

Effect of Resin Infiltrant versus Universal Adhesive on Microhardness of Acidic Challenged-White Spot Lesions (In-vitro Study)

Document Type : Original Article

Authors

¹ Conservative Dentist at El-Hussein University Hospital, Egypt

² Professor of Operative Dentistry, Department of Conservative Dentistry, Faculty of Dental Medicine for Girls, Al Azhar University, Cairo, Egypt & Department of Restorative Dentistry, Faculty of Dental Medicine, Umm Al Qura University, Makkah, Saudi Arabia

³ Assistant Professor of Operative Dentistry, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt

10.58675/2974-4164.1610

Abstract

Purpose: This study investigated the effect of resin infiltrant versus universal adhesive resin on microhardness of white spot lesions without and with an acidic challenge. Materials and methods: A total of 30 human premolars were included. The teeth were cut vertically into two similar halves; (n=60 specimens). The enamel surface of each specimen was partially covered with acid-resistant nail polish, leaving a 4x3mm as an investigational window. Then, all the specimens were immersed in a demineralizing solution for 72 hrs and the tested materials were applied. The specimens were randomly distributed into four groups; A1: Untreated sound enamel, A2: Demineralized enamel, A3: Demineralized enamel + resin infiltrant and A4: Demineralized enamel + the universal adhesive system. For the acidic challenge, the resin infiltrant and universal groups’ specimens were further soaked in the same demineralizing solution for another 72 hrs. The Microhardness test was performed once for each specimen in sound and demineralized enamel groups; while for the resin infiltrant and universal adhesive groups, the time of assessment was; B1: before the acidic challenge and B2: after the acidic challenge. Results: Microhardness results showed that the resin infiltrant group had a significant increase in microhardness than the universal adhesive group before and after the acidic challenge (P ≤0.05). Conclusion: The ICON® resin infiltration system seemed to have a more positive impact on surface microhardness and acidic resistance to the acidic challenge than the All-Bond Universal adhesive.

Keywords

Main Subjects