Which principle involves cleaning the cavity and removing debris before restoration?

• A. Finishing
• B. Outline form
• C. Retention form
• D. Debridement

Answer: (D)

Cleaning the cavity and removing debris before restoration is about debridement. This step targets all leftover decayed tissue, contaminated dentin, blood, saliva, and other debris that gathered in the cavity during preparation. By cleaning thoroughly, you leave a smooth, clean surface that bonds better with the restorative material and seals more effectively, reducing the risk of micro leakage and secondary decay. The other principles have different roles: outline form defines the cavity boundaries and access, retention form creates features that help the restoration stay in place, and finishing shapes and smooths the margins after the restoration is placed. So, debridement is the phase that directly prepares the cavity by clearing away debris before restoration.