Temporary crown

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A temporary crown (white) on a tooth after endodontic therapy

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.[1] Temporary crowns function to protect the tooth, prevent teeth shifting, provide cosmetics, shape the gum tissue properly, and prevent sensitivity.[2]

Attachment[edit]

A temporary crown will usually be cemented in place with a soft temporary dental cement.[3] 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.[4] If a dentist cannot be seen in a timely manner, the temporary crown may be recemented by applying temporary cement to the temporary crown.

Materials[edit]

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.[5]

References[edit]

  1. ^ Amin BM, Aras MA, Chitre V (2015). "A comparative evaluation of the marginal accuracy of crowns fabricated from four commercially available provisional materials: An in vitro study". Contemporary Clinical Dentistry. 6 (2): 161–5. doi:10.4103/0976-237X.156035. PMC 4456735. PMID 26097348.
  2. ^ http://www.baselinedental.com/temporary-crown-fell-out/[full citation needed]
  3. ^ Ribeiro JC, Coelho PG, Janal MN, Silva NR, Monteiro AJ, Fernandes CA (2011). "The influence of temporary cements on dental adhesive systems for luting cementation". Journal of Dentistry. 39 (3): 255–62. doi:10.1016/j.jdent.2011.01.004. PMID 21241765.
  4. ^ Craddock HL, Youngson CC (2004). "A study of the incidence of overeruption and occlusal interferences in unopposed posterior teeth". British Dental Journal. 196 (6): 341–8, discussion 337. doi:10.1038/sj.bdj.4811082. PMID 15044991.
  5. ^ Astudillo, Daniela; Delgado Gaete, Andrés; Bellot-Arcis, Carlos; Montiel-Company, Jose; Pascual, Agustin; Almerich-Silla, Jose (2018-02-28). "Mechanical properties of provisional dental materials: A systematic review and meta-analysis". PLOS ONE. 13: e0193162. doi:10.1371/journal.pone.0193162.