Dimensional Stability of Color-Changing Irreversible Hydrocolloids after Disinfection
Journal Title: Journal of Dental Biomaterials - Year 2015, Vol 2, Issue 1
Abstract
Statement of Problem: Disinfection of dental impressions is a weak point in the dental hygiene chain. In addition, dental office personnel and dental technicians are endangered by cross-contamination. Objectives: This study aimed to investigate the dimensional stability of two color-changing irreversible hydrocolloid materials (IH) after disinfection with glutaraldehyde. Materials and Methods: In this in vitro study, impressions were made of a master maxillary arch containing three reference inserts on the occlucal surface of the left and right maxillary second molars and in the incisal surface of the maxillary central incisors. Two types of color-changing irreversible hydrocolloid (tetrachrom, cavex) were used. Glutaraldehyde 2% was used in two methods of spraying and immersion to disinfect the impressions. The control group was not disinfected. Casts were made of type IV gypsum. The linear dimensional change of the stone casts was measured with a profile projector. For statistical analysis, Kruskall-Wallis and Mann-Witney tests were used (α=0.05). Results: By immersion method, the casts fabricated from tetrachrom were 0.36% larger in the anteroposterior (AP) and 0.05% smaller in cross arch (CA) dimensions; however, the casts prepared after spraying of tetrachrom were 0.44% larger in the AP and 0.10% smaller in CA dimensions. The casts made from Cavex were 0.05% smaller in the AP and 0.02% smaller in CA dimensions after spraying and 0.01% smaller in the AP and 0.003% smaller in CA dimensions after immersion. Generally there were not significant differences in AP and CA dimensions of the experimental groups compared to the control (p > 0.05). Conclusions: Disinfection of the tested color-changing irreversible hydrocolloids by glutaraldahyde 2% did not compromise the accuracy of the obtained casts.
Authors and Affiliations
AAR Khaledi, F Mahdavi, H Heidary
Keywords
Related Articles
- EP ID EP248903
- DOI -
- Views 90
- Downloads 0
A One-Year Evaluation of a Free Fissure Sealant Program
Statement of Problem: Pit and fissure sealant therapy has been approved as an effective measure in the prevention of occlusal dental caries. Resin based ma- terials are the most common materials used worldwide. A variety...
Evaluation of Perceived Acceptability, Beauty and Value of Different Orthodontic Brackets
Statement of Problem: Although different types of aesthetic brackets are introduced to orthodontic profession to reduce the complaints about the metallic braces, little studies have been done to assess patient's views re...
The Effect of Pre-heating Silorane-based Composite Resin on Marginal Gap Formation of Class V Restorations
Statement of problem: Many efforts have been made to solve the problem of composite resin adaptation and reduce microleakage. Objective: The aim of the present study was to evaluate the effect of preheating of silorane-b...
Cytokeratin: a Shortcut to Diagnose Spindle Cell Carcinoma
A relatively rare subtype of squamous cell carcinoma (SCC) is spindle cell carcinoma (SPCC). It is composed of epithelium-derived spindle cells arranged in sheets with mesenchymal properties and small, hard-ly detectable...
Fracture Toughness of Nanohybrid and Hybrid Composites Stored Wet and Dry up to 60 Days
ABSTRACT Statement of Problem: Patients’ demand for tooth-colored restoratives in the posterior region is increasing. Clinicians use universal nanohybrid resin composites for both anterior and posterior regions. There ar...