IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) e-ISSN: 2279-0853, p-ISSN: 2279-0861.Volume 18, Issue 11 Ser.14 (November. 2019), PP 51-70 www.iosrjournals.org DOI: 10.9790/0853-1811145170 www.iosrjournals.org 51 | Page A Comparative Study of Palatal Shapes And Flexural Properties of Edentulous Maxillary Conventional Heat Polymerised Acrylic Resin Denture Bases With Glass Fibre/Metal Mesh Reinforced Bases. Dr Puttaraj Tukaram Kattimani 1 , Dr Takshil Shah 2 , Dr Vaibhav Pareek 3 , Dr Pravin M Parmar 4 , Dr Haritma Nigam 5 , Dr Parth Shah 6 1. Professor & Head, Department of Prosthodontics, S.B. Patil Institute for Dental Sciences & Research, Bidar 2. Assistant Professor, Department of Prosthodontics, Pacific Dental College & Research Centre, Udaipur 3. Associate Professor, Department of Orthodontics, Pacific Dental College & Hospital, Udaipur 4. Assistant Professor, Department of Dentistry, SMIMER Medical College, Surat 5. Assistant Professor, Dept.of Oral Medicine & Radiology, Pacific Dental College & Research Centre, Udaipur 6. Chief Dental Surgeon, Chandan Multispeciality Dental Clinic, Ahmedabad, Gujarat. Corresponding Author: Dr Takshil Shah Assistant Professor, Department of Prosthodontics, Pacific Dental College & Research Centre, Udaipur Abstract OBJECTIVES: - This in vitro study was performed to determine the relationship of depth of palatal vault and fracture strength of permanent conventional denture bases with the glass fibre & metal mesh reinforced conventional denture bases keeping one standard thickness. METHODS: - Edentulous maxillary cast of shallow, medium and deep palatal vault were selected. Each cast was duplicated twenty four times. 8 cast of each group of palatal vault configuration were made. Casts of each palatal vault depth form were waxed to 2.00mm thickness. These patterns were processed with DPI Mumbai India heat polymerized acrylic resin. The thicknesses of the denture bases of conventional reinforced with glass fibres & metallic mesh were measured. These denture samples were kept with non tissue side on the platform of universal testing machine and the load is applied at the rate of 5mm/min. Flexural strength was evaluated and the results were analyzed with Mann – Whitney test. RESULTS: - Results revealed that a direct relationship exists between the fracture load and the denture base reinforced with glass fibres & metallic mesh. As the denture base is reinforced, load required to fracture also increased proportionally. The effect of different shapes of palatal vault configuration on fracture strength revealed that denture bases fabricated on shallow palatal vault of 2mm thickness fractured at lower values of load. Thus denture bases on the shallow palatal vault of 2mm thickness are inherently weaker than denture bases on medium and deep palatal vault configurations. CONCLUSION: - DPI Mumbai India Heat polymerized acrylic resin denture bases on shallow palatal vault are inherently weaker and less resistant to fracture than denture bases fabricated on medium and deep palatal vault configurations. Reinforcing the denture bases significantly increases the fracture load and fracture energy and hence increases the fracture strength of the denture base on a shallow palatal vault. Keywords: Flexural strength; palatal vault; denture base resins. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 23-11-2019 Date of Acceptance: 07-12-2019 --------------------------------------------------------------------------------------------------------------------------------------- I. Introduction The introduction of more satisfactory plastic denture base material occurred in 1937 when Dr Walter Wright described the results of his clinical evaluation of methyl methacrylate resin .The acrylic resin generally have been found to have relatively satisfactory qualities including appearance, dimensional stability and simple procedures for processing of denture . The patient is generally pleased with the color characteristics and function of the dentures. 1 Despite of these excellent properties it is not free from disadvantages. One of the problems encountered in the provision of prostheses is limitation of its strength to meet the functional demands of the oral cavity. During function the denture base is subjected to various stresses like compressive, tensile and shear stress