During the application of a glass ionomer restoration, what is essential to maintain for optimal bonding?

Maintaining moisture control is crucial for optimal bonding when applying a glass ionomer restoration. Glass ionomer materials are designed to bond chemically to both dentin and enamel, and this bond can be adversely affected by excessive dryness or contamination during the setting process.

Moisture facilitates the necessary interactions for the glass ionomer's composition to properly adhere to the tooth structure. If the surface becomes too dry, it can lead to incomplete bonding and might increase the likelihood of microleakage and failure of the restoration over time. Additionally, glass ionomers exhibit better thermal expansion compatibility with tooth structure when moisture levels are managed, contributing to a more durable restoration.

Other factors such as air exposure, low humidity, and high light intensity are less critical for the bonding process of glass ionomer materials and can even lead to issues such as premature setting or degradation of the material properties. Therefore, effective moisture control is essential for achieving a successful and long-lasting bond in glass ionomer restorations.