Er:YAG Laser Plus 60s Acid Etch Restores Bonding in Fluorotic Enamel: Study

According to a new study use of an Er:YAG laser at 100 mJ/30 Hz combined with 60 seconds of acid etching produces excellent adhesion for attachments on fluorotic enamel — restoring bond strength to levels comparable with healthy enamel while avoiding over-etching damage. The researchers found that this approach avoids the risk of over-etching, which can damage enamel structure, while still achieving strong adhesion for orthodontic attachments. Dental fluorosis can alter the mineralization of enamel, making it more resistant to acid etching and reducing bond strength for orthodontic brackets or attachments. Standard etching protocols often fail to achieve optimal adhesion, and aggressive etching may compromise the enamel surface. In this study, the laser-plus-acid combination created an ideal surface texture for micromechanical interlocking without excessive enamel loss. The findings suggest that this protocol could offer clinicians a predictable and safe way to manage bonding challenges in patients with dental fluorosis. By fine-tuning the laser energy and etching duration, the researchers were able to overcome the adhesion limitations of fluorotic enamel while preserving tooth integrity. The authors note that further clinical trials are needed to confirm these in vitro results and evaluate long-term bond durability under oral conditions. If validated, this method could improve treatment outcomes in orthodontics, particularly in regions where fluorosis prevalence is high.