What is the main purpose of bonding orthodontic appliances with glass ionomer?

The primary purpose of bonding orthodontic appliances with glass ionomer cement is indeed to prevent decay and release fluoride. Glass ionomer materials have unique properties that allow them to chemically bond to both the tooth structure and the orthodontic appliance. This strong bond is essential for the successful placement and retention of orthodontic devices.

Additionally, glass ionomer has the added benefit of releasing fluoride over time. This fluoride release helps to strengthen the enamel surrounding the bonded area, providing an ongoing level of protection against demineralization and cavities, which can commonly occur when orthodontic appliances are present in the mouth. This continuous fluoride availability is particularly beneficial for patients undergoing orthodontic treatment, as they may have increased difficulty with oral hygiene due to the appliances, making them more susceptible to dental caries.

While other choices touch upon important aspects of dental materials, those factors do not encompass the primary rationale behind the use of glass ionomer specifically for bonding orthodontic appliances.