Fluoride release from a light-cured bonding material in openbite orthodontic patients

Area of Science:

• Orthodontics
• Dental Materials Science
• Fluoride Chemistry

Background:

• Orthodontic bonding materials release fluoride, potentially influencing the oral environment.
• Differences in oral anatomy, such as openbite versus non-openbite, may affect salivary dynamics.
• Understanding fluoride concentration near brackets is crucial for assessing caries risk and material efficacy.

Purpose of the Study:

• To investigate salivary fluoride concentrations released from orthodontic bonding materials.
• To compare fluoride levels between openbite and non-openbite patient groups.
• To determine the influence of overbite status on fluoride retention on tooth surfaces.

Main Methods:

• Fluoride-releasing brackets were applied to anterior and premolar teeth in both openbite and non-openbite patients.
• Saliva samples were collected using filter paper from tooth surfaces near the brackets at various time points post-bonding.
• Fluoride concentrations were quantified using a fluoride electrode technique.

Main Results:

• Salivary fluoride concentrations initially surged post-bonding, then gradually decreased and stabilized.
• Significantly higher salivary fluoride levels were observed in openbite patients compared to non-openbite patients, persisting for up to one week.
• Overbite status was a major factor influencing fluoride concentration variances (p < 0.001 after one day, p < 0.01 after three days).

Conclusions:

• Fluoride released from orthodontic bonding materials is retained more effectively on tooth surfaces in openbite patients.
• The findings suggest a potentially lower salivary flow rate in openbite individuals, contributing to increased fluoride retention.
• This enhanced retention may have implications for managing caries risk and optimizing fluoride delivery in orthodontic treatment.