Contemporary Posts for Varied Canal Shapes- An Update

Authors: Dr. Shikha Jaiswal, Dr. Sachin Gupta, Dr. Shivali Tyagi, Dr.Manasvi Sharma

DOI: 10.18231/j.aprd.11723.1785887444

Keywords: Flared root canal, Anatomic post, Fiber-reinforced post, Custom fiber post, Accessory Post, Biologic Post

Abstract: Endodontically treated teeth that are structurally compromised often present significant restorative challenges, especially when the root canals are flared or excessively wide or oval in shape. The use of post and core systems remains a common and effective strategy to restore structural integrity in such teeth and provide retention for the final restoration. However, morphological variations- like ribbon-shaped, oval-shaped, or kidney-shaped canals—may complicate the clinical approach due to the difficulty in achieving adequate adaptation and support with standard restorative techniques. Traditionally, custom-cast dowel cores have been recommended in such cases due to their ability to conform to irregular canal anatomy. However, these systems pose notable drawbacks. The high modulus of elasticity of cast metal posts (often up to ten times that of natural dentin) - can lead to stress concentrations at the post-dentin interface, increasing the risk of root fracture. Furthermore, metal posts are limited in their esthetic performance, particularly in anterior regions. On the other hand, while prefabricated single fiber posts offer better esthetics and closer elastic compatibility to dentin, they often fail to adapt adequately to the wide, irregular canal shapes. In this context, this article would discuss contemporary alternatives, such as anatomical post techniques, bundled fiber systems, or custom-fabricated fiber-reinforced composite posts etc., which provide improved canal adaptation, better stress distribution, and enhanced esthetic outcomes, making them more suitable for restoring structurally compromised, flared, or irregularly shaped root canals.