cast post

cast post

an custom fabricated insert within the root canal of a tooth being restored.
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20 The custom cast post and core system is still regarded as the restoration of choice for endodontically treated teeth when there is no coronal dentin.
DISCUSSION: The concept of reattachment begun in 1964 when Chosak and Eidelman used a cast post and conventional cement to reattach an anterior crown segment.
22] In addition, it has been shown that the presence of ferrule (minimum 2 mm) is a decisive factor for the success of cast post and core.
The wax up model was presented to the patient for his consideration and following a discussion of all treatment options and alternatives with him, a treatment plan included: referral for treatment of teeth with periapical lesions, cast post for maxillary right lateral incisor, all ceramic crowns for central and lateral incisors with reducing their length by 2mm and Resin bonded bridge (RBB) replacing maxillary right first premolar.
On removal of the crown, a loosened cast post and core was retrieved with the root stump remaining.
Introduction: endodontically treated teeth that will be restored with crowns and which have lost part of their dental structure need a cast post or a prefabricated post to improve final restoration retention and therefore to be able to regain their functionality and aesthetics.
Ratnakar et al17 in his survey found that majority of the endodontically treated were restored with PFM after placement of cast post.
For a flared canal, the use of a cast post can concentrate wedging forces at the weakened coronal portion of the root.
The upper central incisor was chosen because of its conical root shape, for being a monoradicular tooth that usually presents high restoration averages, and because its simple shape facilitates its computer design, as it presents a relatively cylindrical pulp canal with few shape alterations and variations (its canal is circular at the middle and cervical thirds, and becomes ovoid at the apical third), (15) favoring its indication for cast post as pre-fabricated.
Some researches advised that resin cements with dentin bonding agents can be used when the length of the post space is less than ideal or when the holes is not rounded and help to overcome retention problems and may fills in the spaces and eliminates the need for a cast post.
Studies have indicated that dentin-bonded resin post-core restorations provide significantly less resistance to failure than cemented custom cast posts and cores.
Comparison of fracture resistance between cast posts and fiber posts: a meta-analysis of literature.