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The study aims to evaluate how different disinfectants affect dentine structure and seal quality in dental restorations.

January 17, 2026BDJ OpenOpen Access

The effect of Chlorohexidine, Er:YAG laser and diode laser 980 nm as dental cavity disinfectants on dentine morphology and microleakage of composite restoration: an in vitro study

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The study aims to evaluate how different disinfectants affect dentine structure and seal quality in dental restorations.
Conducted an in vitro study with 40 extracted molars assigned to four groups: control, chlorhexidine, diode laser, and Er:YAG laser.
Applied 2% chlorhexidine, 980 nm diode laser, and Er:YAG laser to respective groups as cavity disinfectants.
Assessed dentine morphology and microleakage using Scanning Electron Microscopy and mineral content via Energy-Dispersive X-ray Spectroscopy.
Chlorhexidine left smear layer residues; diode laser partially removed it; Er:YAG laser completely eliminated the smear layer.
Er:YAG laser showed significantly higher mineral content compared to chlorhexidine and diode laser groups (p < 0.001).
Microleakage was lowest in the Er:YAG group and highest in the control group (p < 0.001).

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In vitro study compares disinfectants to assess their impact on dentine and composite sealing, suggesting notable outcomes for laser treatments.

Khafagi et al. (2026) studied this question.

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In vitro study compares disinfectants to assess their impact on dentine and composite sealing, suggesting notable outcomes for laser treatments.