A Comparative Evaluation of the Efficacy of Disinfectants on Patient Derived Irreversible Hydrocolloid Impressions and their Effect on the Dimensional Accuracy of the Impression Material

Research Article

J Dent App. 2017; 4(1): 379-384.

A Comparative Evaluation of the Efficacy of Disinfectants on Patient Derived Irreversible Hydrocolloid Impressions and their Effect on the Dimensional Accuracy of the Impression Material

Verma K¹*, Mahesh GE², Parag D³, Rashima V4 and Ashish K5

1Graded Specialist, Division of Prosthodontics, MDC, BEG, India

2Commandant, Division of Prosthodontics, CMDC (WC), India

3Classified Specialist, Division of Prosthodontics, 14 CDU, India

4Dental Surgeon, ECHS Polyclinic, Kirkee, India

5Graded Specialist, Division of Prosthodontics, CMDC (CC), India

*Corresponding author: Kamal Verma, Graded Specialist, Division of Prosthodontics, MDC, BEG, India

Received: May 14, 2017; Accepted: June 07, 2017; Published: June 14, 2017

Abstract

Purpose: Assessing the efficacy of disinfectants on irreversible hydrocolloid impressions and their effect on the dimensional accuracy.

Materials and Methods: The study was carried out to compare the efficacy of three commercially available disinfectants (Cidex – 2% Glutaraldehyde (Johnson & Johnson), 1% Sodium Hypochlorite (I - Dent), MD 520 – 0.5% Glutaraldehyde and 0.25% Ammonium chloride (Durr)) in eliminating or reducing the microbial colonies on patient derived irreversible hydrocolloid impressions and the resultant effect on the dimensional accuracy of the impression material when exposed to these agents.

Results: MD 520 system resulted in maximum (95.6%) removal of the visible colonies for all samples investigated and 1% sodium hypochlorite was found to cause the least amount of dimensional changes in irreversible hydrocolloid impressions.

Conclusions: It is entirely the clinician’s choice to select disinfecting agents to use considering all their advantages and disadvantages. It should be kept in mind that though MD 520 was shown to be the most effective disinfectant, sodium hypochlorite caused lesser dimensional changes in the alginate impressions.

Keywords: Disinfection; Irreversible Hydrocolloid; Dimensional stability

Introduction

Disinfection of dental impressions has drawn much attention and research interest in recent years [1]. To address cross contamination concerns, the American Dental Association has issued guidelines for disinfecting impressions while using spray or immersion disinfectants. Three important factors must be considered when dental impressions are disinfected - how are the impression material and resultant cast affected, how stable are the disinfectant solutions and how effective are the disinfection procedures [2]. Very few studies have been undertaken till date which reveals answers to all these aspects together. Meanwhile, manufacturers claim disinfectants are better for disinfection of irreversible hydrocolloid impressions, but they do not mention about the dimensional accuracy of the impression. The idea behind conceptualizing this study was the fulfillment of the following objectives: (1) To clinically examine the carriage of oral pathogens on the impression surface. (2) To clinically evaluate the disinfection efficacy of three commercially available agents in removing oral pathogens from patient derived impressions. (3) To evaluate the effect of these disinfecting agents on the dimensional stability of irreversible hydrocolloid impressions.

Materials and Methods

The study was carried out at our centre to compare the efficacy of three commercially available disinfectants (Cidex – 2% Glutaraldehyde (Johnson & Johnson), 1% Sodium Hypochlorite (I - Dent), MD 520 – 0.5% Glutaraldehyde and 0.25% Ammonium chloride (Durr)) (Figure 1) in eliminating or reducing the microbial colonies on patient derived irreversible hydrocolloid impressions and the resultant effect on the dimensional accuracy of the impression material when exposed to these agents.