Question

The dentist asks you to make provisional crown for teeth #8 and #9. Your choice of coverage the polycarbonate crown. Because the teeth involved are the maxillary centrals, what are your concerns regarding these provisional crowns?

Answer 1

* In the above case tooth 8 and 9 are mainly premolars, having maxillary centrals. Therefore they need proper crown preparation using preformed polycarbonate materials.

* Polycarbonate crowns for use in primary anterior teeth.

* polycarbonate crowns are having advantages include

Esthetically acceptable.

Less chair side time.

Improved retention.

Flexible and better adaptability.

* The disadvantages include

Breakages.

Dislodgement.

Discoloration.

* Polycarbonate crowns are molded acrylic resin cells that are adapted to teeth with self cured acrylic resin.

* They are not as technique sensitive as composite strip crowns.

* Polycarbonate crowns provide an aesthetic, tooth coloured restoration at a low cost.

* Their durability varies from application to application, but they are most often used for temporary restorations.

* Polycarbonate crowns are more aesthetic than stainless steel crowns.

* The Polycarbonate material was brittle and did not resist strong abrasive forces, exhibiting frequent fracture and dislodgement.

* provisional/ Temporary crowns are designed only last for a short amount of time, so its important to keep next appointment to have the permanent crown put in place.

* provisional crown lasts for two or three weeks.

* The material is not recommended for long term protection of the repaired tooth.