A PMMA plastic temporary crown is a provisional dental restoration made from polymethyl methacrylate (PMMA), used during the interim period before placement of the permanent crown. It covers and protects the prepared tooth or implant, helping prevent sensitivity and discomfort.

PMMA temporary crowns maintain tooth position, bite alignment, and gum contour, supporting proper soft tissue healing. They provide acceptable aesthetics and basic chewing function while the final restoration is fabricated. Although intended for short-term use, PMMA temporary crowns play an essential role in ensuring comfort, tissue health, and optimal outcomes for the definitive crown.