Comparative evaluation of diametral tensile strength of phosphate-bonded investment (ringless) material by using air-drying method, conventional hot air oven, microwave oven, and combination of microwave and conventional oven: An in vitro study

Abstract

Aim:

This study evaluated and compared the diametral tensile strength (DTS) of phosphate-bonded investment (PBI) material (ringless) used in removable cast partial denture fabrication.

Settings and Design:

Comparative - Invitro study.

Materials and Methods:

The PBI material, Wirovest used in this study was subjected to four different drying methods. A total of 80 specimens were prepared in a cylindrical form; 20 specimens were air dried for 2 h, 20 specimens were dried in a conventional oven at 230°C for 1 h, 20 specimens were dried in microwave oven at 600 W for 10 min, and remaining 20 specimens were dried first in microwave oven and then in conventional oven. The dried specimens were tested at 2-h interval for diametral compression at a crosshead speed of 0.5 cm/min.

Statistical Analysis Used:

Pairwise analysis.

Results:

The microwave drying technique and drying by combination method resulted in greater DTS, respectively.

Conclusion:

Within the limitation of this study, PBI specimens dried in microwave oven at 600W for 10 min increased the diametral strength and are also a time-saving procedure.

Journal

Journal ID (nlm-ta): J Indian Prosthodont Soc

Journal ID (iso-abbrev): J Indian Prosthodont Soc

Journal ID (publisher-id): JIPS

Title: The Journal of the Indian Prosthodontic Society

Publisher: Wolters Kluwer - Medknow (India )

ISSN (Print): 0972-4052

ISSN (Electronic): 1998-4057

Publication date (Print): Jul-Sep 2019

Volume: 19

Issue: 3

Pages: 248-254

Affiliations

Department of Prosthodontics, V.S.P.M's Dental College and Research Centre, Nagpur, Maharashtra, India

Author notes

Address for correspondence: Dr. Akhil Ghanshyamdas Rathi, 401, Shubham Enclave Rahate Colony, Nagpur - 440 022, Maharashtra, India. E-mail: drakhilrathi@ 123456gmail.com

Article

Publisher ID: JIPS-19-248

DOI: 10.4103/jips.jips_45_19

PMC ID: 6685339

PubMed ID: 31462864

Copyright statement: Copyright: © 2019 The Journal of Indian Prosthodontic Society

License:

This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.

Categories

Subject: Original Article