The retention of periodontal packs is due to which type of interlocking?

The retention of periodontal packs is primarily due to mechanical interlocking. In the context of periodontal surgery, periodontal packs are used to protect the surgical site, control bleeding, and stabilize the tissues. Mechanical interlocking occurs when the material of the pack physically engages with the surface of the underlying tissues or structures.

This type of retention relies on the physical properties of the packing material, which is designed to adapt and conform to the irregularities of the gum tissue and surrounding areas. As the pack is placed, it occupies space and grooves between tissues, creating a fit that secures it in place, much like how a puzzle piece fits into its corresponding space. This mechanical interlocking provides stability and prevents the pack from dislodging easily during the healing process.

While there are other means of retention, such as chemical bonding or physical forces, they do not play as significant a role in the context of periodontal packs as mechanical interlocking does. Understanding this concept is crucial in periodontal practice, as it helps clinicians choose and apply the suitable materials effectively to enhance patient outcomes after surgical procedures.