Pranati T, Manish Ranjan, Hima Sandeep A. Marginal Adaptability of Custom Made Cast Post Made by Different Techniques - A Literature Review. Int J Dentistry Oral Sci. 2021;8(8):3954-3959. 3954 OPEN ACCESS https://scidoc.org/IJDOS.php Marginal Adaptability of Custom Made Cast Post Made by Different Techniques - A Literature Review Research Article International Journal of Dentistry and Oral Science (IJDOS) ISSN: 2377-8075 *Corresponding Author: Dr. Manish Ranjan, Associate Professor, Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India.. Tel: +91- 9543445029 E-mail: manish@saveetha.com Received: May 20, 2021 Accepted: August 11, 2021 Published: August 18, 2021 Citation: Pranati T, Manish Ranjan, Hima Sandeep A. Marginal Adaptability of Custom Made Cast Post Made by Different Techniques - A Literature Review. Int J Dentistry Oral Sci. 2021;8(8):3954-3959. doi: http://dx.doi.org/10.19070/2377-8075-21000809 Copyright: Dr. Manish Ranjan © 2021. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited. Pranati T 1 , Manish Ranjan 2* , Hima Sandeep A 3 1 Undergraduate Student Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India. 2 Associate Professor, Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India. 3 Senior Lecturer, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India. 1. Introduction After root canal treatment, dentists are subjected with the task of restoring the tooth to rehabilitate oral functions as well as aesthet- ics. A post and core crown is a type of dental restoration required where there is an inadequate amount of sound tooth tissue re- maining to retain a conventional crown [1]. A post is cemented into a prepared root canal, which retains a core restoration, which retains the fnal crown. The role of the post is frstly to retain a core restoration and crown, and secondly to redistribute stresses down onto the root, thereby reducing the risk of coronal fracture. The post does not play any role in reinforcing or supporting the tooth and can in fact make it more likely to fracture at the root. The restoration must achieve adequate retention and circumvent damage to the remaining hard tissue through the prevention of bacterial microleakage and hard-tissue fractures. Studies indicate that the tooth is less prone to fracture when less dental hard tis- sue is removed during the process of treatment. On the other hand, endodontic therapy is often necessitated by pulpal infec- tion after substantial hard-tissue loss by caries or following ex- tensive tooth preparation for crown- and bridgework. In both cases, much hard tissue has already been lost before root canal therapy. Therefore, there is often insuffcient dental hard tissue left to ensure adequate retention of a functional restoration after endodontic treatment without adjuvant aids [2]. It was considered that a post with an ideal length of two-third of the total root length would reinforce the compromised tooth [3]. The length of the post is less important for the survival of the tooth than the presence of a ferrule of at least 1.5 mm. Materials with a high modulus of elasticity, like cast gold alloys [90 GPa], stainless Abstract Introduction: A post and core is a type of dental restoration required where there is an inadequate amount of sound tooth tissue remaining to retain a conventional crown.Marginal and internal adaptation of indirect restorations are both very impor- tant parameters that may affect the periodontal status and longevity of the restorations. .In this review we report all the factors responsible for affecting the marginal adaptability of post and core systems used in restoration of endodontically treated teeth. Purpose: To fnd out all those factors which can be used to increase marginal adaptability which ultimately enhance the clini- cal success rate. Since Increased marginal discrepancies of post endodontic restorations are related to increased exposure of the luting material to the oral environment, leading to chemo-mechanical degradation of the cement and the adhesive interface between the tooth structure, luting agent, and esthetic indirect restoration. Conclusion: The performance of a CAD-CAM system relative to marginal adaptation is infuenced by the restorative mate- rial. Digital workfow has several advantages over conventional casting, such as eliminating the need for impression material and transportation, reducing the time-consuming laboratory procedures, increasing patient comfort and the marginal adapt- ability and internal ft. Keywords: CAD-CAM; Cast Metal; Custom Post; Microleakage; Zirconia.