Evaluation of Flexural Strength and Fracture Toughness of Feldspathic Metal Ceramic-Invitro Study

Dr. Yellajosyula S V Aishwarya, Dr. Angadi Kalyan Chakravarthy, Dr. P. Laxman Rao, Dr. Ramavarapu Avinash, Dr. Alaveni Manga Narsingoju

Abstract: Background & Objectives: Ceramic material is being extensively used in dentistry because of its aesthetic appearance similar to the tooth structure. One of the most extensively used materials in prosthetic dentistry is the feldspathic ceramics used for fabrication of the fixed dental prostheses but are limited by their inherent brittleness which is one of the primary reasons for the use of a metal substructure to reinforce the ceramic restoration. This study was done to evaluate the flexural strength and fracture toughness of feldspathic metal ceramic. Materials and Methods: The present study is to evaluate flexural strength and fracture toughness of feldspathic metal ceramic. A total of 120 samples of various thickness of about 0.5mm, 1.5mm, 2mm, 2.5mm were fabricated through the standardized casting procedure following this the metal discs (10mm*2mm) are covered with feldspathic ceramic of shade A2. These samples are then immersed in the ultrasonic bath containing 75% ethanol for 10 min and are dried. Then, the samples are tested for flexural strength and fracture toughness under universal testing machine. Results: A combination of Descriptive Statistics, One-Way ANOVA, and Post-Hoc Pairwise Comparisons was applied. It was found that the 1.5mm thickness was found to have the highest fracture toughness and superior flexural strength when compared to the 0.5mm and 2mm, 2.5mm. Conclusion: It can be concluded that the 1.5mm thickness was found to have the highest fracture toughness and superior flexural strength when compared to the 0.5mm and 2mm, 2.5mm.

Keywords: Feldspathic (VITA VMK MASTER), Flexural strength, Fracture toughness

How to Cite?: Dr. Yellajosyula S V Aishwarya, Dr. Angadi Kalyan Chakravarthy, Dr. P. Laxman Rao, Dr. Ramavarapu Avinash, Dr. Alaveni Manga Narsingoju, "Evaluation of Flexural Strength and Fracture Toughness of Feldspathic Metal Ceramic-Invitro Study", Volume 14 Issue 7, July 2025, International Journal of Science and Research (IJSR), Pages: 1381-1385, https://www.ijsr.net/getabstract.php?paperid=SR25719104121, DOI: https://dx.doi.org/10.21275/SR25719104121