The CAD/CAM post and core allows for the proper control of the design as well as the thickness of the cement layer. With the aid of CAD/CAM, time can be saved from the processing of post and core, making the process simpler and reliable. It allows the anatomic structure to be digitally planned and then milled or 3D-printed. In addition to the adequate biomaterial, the digital workflow with CAD/CAM also plays an important role in improving the manufacturing of custom-made post and core. In order to prove this theory, further laboratory and clinical studies are necessary. Theoretically, post and core systems fabricated with these materials may decrease the occurrence of root fractures. Few studies have examined PEEK applied as post and core materials. Previous studies have shown that PEEK is a promising biocompatible material that has good shock absorbing capacity, mechanical strength, and both thermal and chemical resistance. Examples of these materials are high-performance polymers, such as polyetheretherketone PEEK. Post and core materials with dentin-like biomechanical properties could also be beneficial in minimizing the risk of root fractures or debonding. Īccording to the literature, the optimal material for manufacturing post and core should have an elastic modulus that accommodates the normal flexural dynamics of the root. ![]() In clinical protocols, some materials were tested to prevent the catastrophic fractures of endodontically treated teeth. However, this can result in catastrophic fractures of roots in weakened areas if overloaded with occlusal forces. Stiff materials can promote high stress concentrations in the post surface but will deflect less during loading, which can be better to support the coronal restorations. The ideal elastic modulus of the endodontic post is controversial. In cases of extensive coronal tooth destruction, where extra retention is required, a post should be inserted to the root in order to retain the core and the restoration The choice between using a custom-made post or a prefabricated one relies on multiple factors, such as canal configuration, remaining tooth structure and restorative technique The custom-made posts are fabricated mainly from metal, zirconia, and fiber-reinforced composite. ![]() Nowadays the clinicians look forward to conservative treatment approaches, a paradigm shift that can be attributed to the advances in endodontics and restorative dentistry associated with modern restorative techniques. ![]() Earlier extraction of teeth was the most common treatment modality for innumerous conditions instead of preservation. Dentistry has undergone significant evolution since its beginning.
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