CC BY-NC-ND 4.0 · Dental Journal of Advance Studies 2021; 9(01): 36-42
DOI: 10.1055/s-0040-1721551
Original Article

An In vitro Study to Evaluate and Compare the Dimensional Accuracy of Poly (Methyl Methacrylate) by Injection Molding and Conventional Molding Technique

1  Department of Prosthodontics, Crown and Bridge and Implantology, Rishiraj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India
,
Vaibhav Awinashe
2  Dental Faculty, Department of Dentistry in Al-Russ, Qassim University, Buraydah, Saudi Arabia
,
Umesh Palekar
3  Department of Prosthodontics, Rural Dental College and Hospital, Loni, Maharashtra, India
,
Siddharth Gupta
1  Department of Prosthodontics, Crown and Bridge and Implantology, Rishiraj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India
,
Shilpa Jain
1  Department of Prosthodontics, Crown and Bridge and Implantology, Rishiraj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India
,
Arpit Jain
4  Department of Oral Medicine and Radiology, College of Dental Sciences and Hospital, Indore, Madhya Pradesh, India
› Author Affiliations

Abstract

Introduction Poly(methyl methacrylate) is widely used as denture base material due its better physical properties, ease to fabricate, and repair. Despite being the material of choice for the denture fabrication, dentures made from poly(methyl methacrylate) may exhibit dimensional changes due to volumetric shrinkage. This further affects the retention of the denture. Various methods have been used to overcome this problem. One such method is the use of injection molding technique. So, a study was planned to evaluate the efficacy of dentures processed by injection molding technique in reducing the volumetric shrinkage.

Objective To evaluate and compare the dimensional accuracy of poly(methyl methacrylate) resin processed by conventional and injection molding technique.

Materials and Methods A total of 90 samples were made. Half of the samples (45) were fabricated by compression molding and half (45) by injection molding technique. Dimensional change was studied at three equidistant points in posterior region with the help of digitized travelling microscope. Statistical analysis was done using student’s t-test.

Result Dimensional accuracy of injection molded poly(methyl methacrylate) resin was greater than that of compression molded poly(methyl methacrylate).



Publication History

Publication Date:
12 December 2020 (online)

© 2020. Bhojia Dental College and Hospital affiliated to Himachal Pradesh University. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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