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Temporary crowns can either be direct, if constructed by the dentist in the clinic, or indirect if they are made off-site, usually in a dental laboratory. Generally direct temporary crowns tend to be for short-term use. Where medium-term or long-term temporisation is required, the use of indirect temporary crowns should be considered. [10]
If a temporary crown becomes de-cemented, it is important that a dentist examine the patient as overeruption of the opposing teeth may prevent accurate fitting of the final crown. [8] If a dentist cannot be seen in a timely manner, the temporary crown may be re-cemented by applying temporary cement to the temporary crown.
Temporary filling-materials allow the creation of hermetic coronal-seals preventing from coronal microleakage (i.e. contamination of the root canal by bacteria); their presence over the entire time-period to fill the root canal and restore the tooth crown is mandatory, for increasing the probability of the endodontic-treatment success.
[3] [4] This problem has not been realised with one study showing long-term data beyond five years, to when the baby teeth are lost, with fewer problems from the tooth with the crown. Crowns placed using the Hall Technique have better long term outcomes (pain/infection and need for replacement) compared with standard fillings. [5] [6] [7]
Provisional (or temporary) luting agents are used specifically for inter-appointment fixation of temporary restorations, prior to cementation of a permanent restoration. [20] It is mainly provisional crowns and bridges (fixed partial dentures) that are cemented with eugenol-containing temporary cements, but sometimes they may be used for ...
Temporary restoration is a temporary filling of a prepared tooth until permanent restoration is carried out. It is used to cover the prepared part of the tooth, in order to maintain the occlusal space and the contact points, and insulation of the pulpal tissues and maintenance of the periodontal relationship.
If permanent restoration cannot be carried out immediately after tooth preparation, temporary restoration may be performed. The prepared tooth, ready for placement of restorative materials, is generally called a tooth preparation. Materials used may be gold, amalgam, dental composites, glass ionomer cement, or porcelain, among others.
Sedative material placed over exposed or nearly exposed pulp 1) crown 2) root 3) restoration 4) pulp cap 5) pulp chamber Pulpal dentin junction. 1) outside tooth/enamel 2) dentin tubule 3) dentin 4) odontoblastic process 5) predentin 6) odontoblast 7) capillaries 8) fibroblasts 9) nerve 10) artery/vein 11) cell-rich zone 12) cell-poor zone 13) pulp chamber