Evolution of Techniques in Recording Posterior Palatal Seal – A Review Rajakumari Natarajan 1* , Priyadharshini Ramesh 1 , Sunantha Selvaraj 2 and Jayashree Mohan 3 1 Interm; 2 Senior Lecturer; 3 Professor and Head of Department, Department of Prosthodontics, Vinayaka Mission’s Sankarachariyar Dental College, NH – 47, Sankari Main Road, Ariyanoor, Salem – 636308, Tamil Nadu, India; principal.vmsdc@vmu.edu.in, rajakumari.tn@gmail.com 1. Introduction Te widely accepted choice of treatment for edentulous patients is tissue supported complete dentures and their success depends on the relation between denture and anatomic structures that support and limit them 1 . Failure to have accurately adapted denture bases, correct thick- ness, shape and extension of denture fanges, proper relief adequate posterior palatal seal, polished and occlusal surfaces located in neutral zone and/or balanced occlu- sal surfaces may result in loss of retention 2 . According to Skinner, “Te most efective addition to increase reten- tion is post dam” 3 . Hardy and Kapur maintained that retention and stability that is achieved from adhesion, cohesion and interfacial surface tension are able to resist only those dislodging forces that act perpendicular to the denture base. Horizontal forces and lateral torqueing of the maxillary denture can be resisted only by adequate border seal. Terefore, the proper placement of Posterior palatal seal commands a defnite clinical procedural pro- Journal of Academy of Dental Education, 13-17, DOI: 10.18311/jade/2017/16451 D e n t a l Ed u c a t i o n J o u r n a l o f A c a d e m y o f ISSN (Print): 2348-1595 ISSN (Online) : 2348-2621 Date of Receiving: July 2017 Date of Submission: Oct 2017 Date of Acceptance: Nov 2017 Abstract A perfectly constructed denture with significant retention will aid in patient’s esthetic, functional and psychological fac- tors. Retention of complete denture is based on both patient and denture factors. Fines sand knowledge of the clinician and technician plays a major role in denture factor. In a maxillary denture, border seal in the posterior region is taken care by proper recording of Posterior Palatal Seal (PPS). Lack of success of many dentures is due to improper formation of distal palatal length and absence of a posterior palatal seal. Generally, the diagnostic evaluation and enplacement of posterior seal are given only minor attention in complete denture fabrication. This article reviews the conspicuousness of the poste- rior palatal seal and various techniques of recording PPS. Keywords: Complete Denture Retention, Posterior Palatal Seal, Posterior Palatal Seal Region, Soft Palate, Vibrating Line tocol if one is to create an optimally retentive complete maxillary prosthesis 4 . 2. Defnitions According to Glossary of Prosthodontics Terms-8 “Posterior palatal seal is defned as a sof tissue along the junction of the hard and sof palates on which pressure within the physiologic limits of the tissues can be applied by a denture to aid in the retention of the denture” 5 . “Fovea palatina are the two small pits or depressions in the posterior aspect of the palate, one on each side of the midline, at or near the attachment of the sof palate to the hard palate” 5,6 . “Te palpable notch at the junction of maxilla and the pterygoid hamulus of the sphenoid bone in the tissue surface of upper denture, a raised portion at its posterior extent is called postdam” 5,6 . “Te anterior vibrating line is an imaginary line located at the junction of the attached tissues overlying the hard