Int J Prosthodont. 1994 Jul-Aug;7(4):315-22.

Immersion disinfection of irreversible hydrocolloid impressions with sodium hypochlorite. Part II: Effect on gypsum.

The International journal of prosthodontics

K S Vandewalle, D G Charlton, R S Schwartz, S E Reagan, R G Koeppen

PMID: 7993542

Abstract

This study investigated the effects of various immersion times and concentrations of sodium hypochlorite on irreversible hydrocolloid impressions and resultant gypsum casts. Irreversible hydrocolloid impressions of a test die were immersed for 1, 5, or 10 minutes in water (control), 5.25%, 0.525%, and 0.0525% sodium hypochlorite and then cast in a Type III stone and a Type V stone. Each stone specimen was evaluated for detail reproduction, dimensional change, surface roughness, and surface hardness. The results indicated that impressions may be immersed in sodium hypochlorite for any of the experimental times and concentrations without negative effects on Type V stone casts. However, immersion of impressions in 5.25% sodium hypochlorite causes some surface deterioration on Type III stone casts.

Substances

• Alginates
• Dental Impression Materials
• Sodium Hypochlorite
• Calcium Sulfate

MeSH terms

• Alginates / chemistry
• Analysis of Variance
• Calcium Sulfate / chemistry
• Dental Impression Materials / chemistry
• Disinfection / methods
• Hardness
• Infection Control / methods
• Models, Dental
• Reproducibility of Results
• Sodium Hypochlorite / chemistry
• Surface Properties
• Time Factors

Publication Types

• Journal Article