Related Experiment Video
Updated: Jan 22, 2026
06:25
A Simple and Effective Method to Consistently Isolate Mouse Cardiomyocytes
Published on: November 11, 2022
3.8K
A simple and effective method for addition silicone impression disinfection.
Maria João Azevedo1, Inês Correia1, Ana Portela1
1Faculty of Dental Medicine, Universidade do Porto, Porto, Portugal.
The Journal of Advanced Prosthodontics
|July 13, 2019
Summary
Dental impression disinfection is crucial for reducing cross-infection. All tested disinfectants, including hydrogen peroxide and sodium hypochlorite, effectively reduce microbial load on addition silicone impressions without compromising dimensional stability.
Area of Science:
- Dental materials science
- Infection control in dentistry
- Microbiology
Background:
- Dental impression disinfection is vital for preventing cross-infection.
- Clinical disinfection practices for dental impressions vary significantly.
- Addition silicone is a common dental impression material.
Purpose of the Study:
- To evaluate the antimicrobial effectiveness of common disinfection methods for addition silicone dental impressions.
- To assess the impact of these disinfection methods on the dimensional stability of addition silicone impressions.
- To compare water wash, 3% hydrogen peroxide, MD520, and 1% & 5.25% sodium hypochlorite.
Main Methods:
- Dental impressions were made from 16 volunteer dental students.
- Antimicrobial effectiveness was determined using the pour plate method.
- Dimensional stability was measured using a standardized stainless-steel model per ANSI/ADA nº19.
Main Results:
- Water wash alone did not reduce microbial load but maintained dimensional stability.
- Disinfection with 3% hydrogen peroxide, MD520, 1% or 5.25% sodium hypochlorite reduced microbial load by over 99.9%.
- None of the tested disinfectants significantly altered the dimensional stability of the addition silicone impressions.
Conclusions:
- Disinfection of addition silicone impressions is essential to minimize cross-infection risk.
- All evaluated disinfectants demonstrated high antimicrobial efficacy without compromising impression accuracy.
- Hydrogen peroxide and sodium hypochlorite are accessible and effective disinfectants for dental impressions, with hydrogen peroxide being a promising alternative.
Related Concept Videos
01:09First Impression
199
First impressions play a crucial role in social perception, shaping how individuals assess others in professional, academic, and interpersonal contexts. Psychological research highlights the significance of cognitive biases, such as the primacy and recency effects, which influence how people interpret and recall information.The Primacy Effect and Cognitive AnchoringThe primacy effect describes the tendency for initial information to impact judgment disproportionately. When individuals encounter...
199
01:30Cleaning, Sterilization, and Disinfection
9.7K
Cleaning, disinfection, and sterilization are the methods that help to break the infection chain and prevent disease.
Cleaning
The cleaning process usually involves using water with detergents or enzymatic cleaner and removing foreign material from objects and surfaces, including organic material such as body fluids or inorganic material like soil. Cleaning is performed before high-level disinfection and sterilization because foreign materials on the cover of the devices interfere with process...
Cleaning
The cleaning process usually involves using water with detergents or enzymatic cleaner and removing foreign material from objects and surfaces, including organic material such as body fluids or inorganic material like soil. Cleaning is performed before high-level disinfection and sterilization because foreign materials on the cover of the devices interfere with process...
9.7K
01:19Managing Impressions
164
Impression management encompasses individuals' deliberate efforts to shape how others perceive them during social interactions. This behavior is often employed to conform to social norms, secure approval, or pursue specific goals. While it involves selective self-presentation, it is not necessarily deceptive; individuals frequently present authentic aspects of themselves that align with situational demands.Common strategies include:Ingratiation: where individuals use flattery or agreeableness...
164
01:27Conjugate Addition (1,4-Addition) vs Direct Addition (1,2-Addition)
4.2K
α,β-Unsaturated carbonyl compounds with two electrophilic sites, the carbonyl carbon, and the β carbon, are susceptible to nucleophilic attack via two modes: conjugate or 1,4-addition and direct or 1,2-addition.
Conjugate addition results in a thermodynamically stable product. The reaction retains the stronger C=O bond at the expense of the weaker C=C π bond. The process is slow as the β carbon is less electrophilic than the carbonyl carbon.
Direct addition products are...
Conjugate addition results in a thermodynamically stable product. The reaction retains the stronger C=O bond at the expense of the weaker C=C π bond. The process is slow as the β carbon is less electrophilic than the carbonyl carbon.
Direct addition products are...
4.2K
01:14Impression Management Techniques IV: Altercasting
175
Altercasting is a strategic communication technique in which an individual imposes a specific identity or social role onto another person to influence their behavior and shape the interaction. By presuming a role—such as “responsible leader” or “patient person”—altercasting encourages the target to conform to that identity, often aligning their behavior with the expectations associated with the role. The power of this tactic lies in its subtlety; once a role...
175
01:08Conjugate Addition of Enolates: Michael Addition
3.4K
The attack of a nucleophile at the β carbon of an α,β-unsaturated carbonyl compound is called conjugate addition. Conjugate addition reactions of active methylene compounds, such as β-diketones, β-keto esters, β-keto nitriles, and α-nitro ketones, are called Michael addition reactions.
3.4K