What is the primary purpose of using a matrix during a restorative procedure?

• A. To shape the filling material and maintain proper contact with adjacent teeth
• B. To cut excess filling material
• C. To isolate the tooth from saliva
• D. To help in tooth whitening

Answer: (A)

The primary purpose of using a matrix during a restorative procedure is to shape the filling material and maintain proper contact with adjacent teeth. A matrix creates a boundary for the restorative material, ensuring that it is contained within the cavity preparation and takes the desired form. This is especially crucial in procedures involving composite resins or other fillings where achieving appropriate contours and contacts with adjacent teeth is vital for both functional and aesthetic reasons.

This strategy helps in restoring the natural anatomy of the tooth, in turn allowing for proper occlusion and preventing issues such as food trapping or interproximal decay. By ensuring good contact points, the matrix plays a key role in the long-term success of the restoration, aiding in maintaining the integrity and health of surrounding teeth. Other options, while related to different aspects of dental procedures, do not fully capture the matrix's specific role in the context of shaping and contact maintenance during restorations.