What function does a primer serve in the context of dental bonding?

A primer serves a crucial function in dental bonding by providing micro-mechanical retention. This is achieved through the primer's ability to infiltrate the tooth structure and bond effectively with both the tooth's surface and the restorative material. Micro-mechanical retention is the process by which the adhesive creates a strong interlocking bond to the rough surfaces of both the tooth and the restorative material. This increases the strength and longevity of the bond, which is essential for successful restorations in dentistry.

While some primers may offer additional benefits, such as mildly enhancing the cleaning of surfaces, the primary role of the primer in bonding procedures is to create this effective mechanical connection. This is pivotal for achieving a durable and reliable bond, thereby ensuring the longevity of dental restorations.