What is the most common type of etch used before bonding brackets?

The most common type of etch used before bonding brackets is gel etch. Gel etch is favored in orthodontics primarily due to its ease of application and controlled placement. The viscosity of the gel allows it to remain in place on the tooth surface without running or dripping, which is especially important when working in the oral cavity.

Using gel etch promotes effective enamel etching, as it typically contains phosphoric acid, which helps to create a favorable surface for adhesive bonding. Proper enamel etching increases the surface area for bonding agents to adhere to the tooth, enhancing the overall bond strength between the bracket and the tooth surface.

This method also helps in minimizing the risk of damage to adjacent soft tissues and the dental chair, as the gel is less likely to spill or spread beyond the intended area. In many dental practices, the gel form is a standardized choice due to these advantages, making it the most common type of etch prior to bonding orthodontic appliances.