A temporary crown (provisional crown, interim crown) is a temporary (short-term) crown used in dentistry. Like other interim restorations, it serves until a final (definitive) restoration can be inserted. Usually the temporary crown is constructed from acrylic resins (monomethacrylate based / polymethacrylate) based or, chemical-cure / light cure composite (dimethacrylate based) , although alternative systems using aluminium crown forms are occasionally used. Temporary crowns function to protect the tooth, prevent teeth shifting, provide cosmetics, shape the gum tissue properly, and prevent sensitivity.
A temporary crown will usually be cemented in place with a soft temporary dental cement. This allows for easy removal when fitting the permanent crown. If a temporary crown becomes decemented, it is important that a dentist examine the patient as overeruption of the opposing teeth may prevent accurate fitting of the final crown. If a dentist cannot be seen in a timely manner, the temporary crown may be recemented by applying temporary cement to the temporary crown.
A systemic study found that di-methacrylate-based provisional restorations had better flexural strength and hardness than the mono-methacrylate-based ones, while, within the mono-methacrylate group, poly-methylmethacrylate showed better flexural strength than poly-ethylmethacrylate.
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