A celluloid strip is commonly used as which of the following?

A celluloid strip is commonly used as which of the following?

• A. Amalgam carver
• B. Amalgam well
• C. Mandrel and pop on sandpaper disc
• D. Celluloid strip

Answer: (D)

A celluloid strip is used as a matrix for composite restorations, especially on anterior teeth. Its transparent plastic form creates a temporary wall against which the composite is placed and cured, producing a smooth, well-contoured proximal surface and proper contact with the adjacent tooth. It also helps prevent excess material from sticking to the opposite tooth and yields a good finish when removed. The other items are used for amalgam handling or finishing metal restorations, not for forming the matrix for composite, so they don’t fit this use.

A celluloid strip is used as a matrix for composite restorations, especially on anterior teeth. Its transparent plastic form creates a temporary wall against which the composite is placed and cured, producing a smooth, well-contoured proximal surface and proper contact with the adjacent tooth. It also helps prevent excess material from sticking to the opposite tooth and yields a good finish when removed. The other items are used for amalgam handling or finishing metal restorations, not for forming the matrix for composite, so they don’t fit this use.