A novel quantitative light-induced fluorescence device for monitoring molar-incisor hypomineralization

Background: The FluoreCam system is based on an innovative approach to the quantification of enamel health termed fluorescence enamel imaging (FEI). Enamel is both highly mineralized and semi-translucent. Because of its mineral composition, enamel will fluoresce when exposed to certain light wavelengths. The semi-translucent nature of enamel results in different enamel densities emitting different levels of fluorescence. As a result, with FEI technology, one can measure the density of tooth enamel by measuring its fluorescence when subjected to specific light wavelengths.Purpose: To determine the ability of visual examination and the instrumental procedures of the FluoreCam to monitor molar-incisor hypomineralization (MIH) lesions.Subjects and Methods: This study involved children with MIH at the Department of Paediatric Dentistry, Marmara University. In total, 11 patients with MIH were diagnosed on a visual MIH scale and evaluated with the FluoreCam. The equipment, data processing, and interaction between the equipment and operator were evaluated.Results: Fluorescent images recorded with the custom software, the clinical view, and digital numeric values were evaluated to assess the potential for use of the device in clinical practice.Conclusion: These preliminary data from an ongoing clinical study suggest that measurements with the FluoreCam are useful in monitoring MIH. This technique also provides visual and quantitative feedback to patients.Keywords: Diagnose, fluorescence imaging, molar‑incisor hypomineralisatio

Microleakage in class V cavities prepared using conventional method versus Er:YAG laser restored with glass ionomer cement or resin composite

This study evaluated the effect of tooth preparation method (diamond bur vs. Er:YAG laser) on the microleakage levels of glass ionomers and resin composite. Human permanent premolars (N = 80) were randomly divided into two groups (n = 40). Cavities on half of the teeth were prepared using diamond bur for enamel and carbide bur for dentin and the other half using Er:YAG laser. The teeth were randomly divided into four groups according to the restoration materials, namely (a) ChemFil Rock (CFR), (b) IonoluxAC (IAC), (c) EQUIA system (EQA) and one resin composite (d) AeliteLS (ALS) (n = 10 per group). Microleakage (μm) was assessed at the occlusal and gingival margins after dye penetration (0.5% basic fuchsine for 24 h). On the occlusal aspect, while the cavity preparation types significantly affected the microleakage for CFR (p = 0.015), IAC (p = 0.001) glass ionomer restorations, it did not show significant effect for glass ionomer EQA (p = 0.09) and resin composite ALS (p = 0.2). Er:YAG laser presented less microleakage compared to bur preparation in all groups except for EQA. On the gingival aspect, microleakage decreased significantly for CFR (p = 0.02), IAC (p = 0.001), except for EQA where significant increase was observed (p = 0.001) with the use of Er:YAG laser. Microleakage decrease was not significant at the gingival region between diamond bur and Er:YAG laser for ALS (p = 0.663). At the occlusal and gingival sites in all groups within each preparation method, microleakage level was not significant