Effect of chemical disinfection on the dimensional stability of polyvinyl ether siloxane impression material: a systemic review and meta-analysis

Abstract

Background and objectives Polyvinyl ether siloxane (PVES) possesses ideal characteristics for making precise and accurate dental impressions. PVES dimensional stability owes to its better polymeric properties derived from its parent materials poly ethers and polyvinyl siloxanes. As recommended use of chemical disinfecting agents is getting more popular, there is a growing concern associated with the effect of disinfectants on PVES dimensional stability. This study was aimed to understand the PVES behavior when subjected to chemical disinfectants. Materials and methodology The data was collected from research studies retrieved from Google Scholar, Scopus, and PubMed using MeSH terms of keywords “vinyl polyether siloxane AND Disinfection” or (Vinyl polyether siloxane OR polyvinyl siloxane ether OR PVES) AND (disinfectant OR disinfection)” without any restriction to publication date. The PRISMA (Preferred Reporting Items for Systemic Review and Meta-Analysis) directions were observed during the data collection, screening of studies, and meta-analysis. The primary data were retrieved, and batch exported from databases using Harzing’s Publish or Perish software; primary analysis was performed in Microsoft Excel, while statistical analysis for effect size, two-tailed p-values, and heterogeneity among studies was performed using Meta Essentials. The effect size was calculated using Hedge’s g values at the 95% confidence level using the random-effects model. Heterogeneity among studies was measured using the Cochrane Q and I2. Results and conclusion Dental impressions made from the PVES elastomeric impression materials showed no significant changes in dimensional stability. Immersion in the chemical disinfectant for 10 min was associated with clinically irrelevant changes in the dimensions of the PVES impressions. Disinfection with sodium hypochlorite was associated with clinically significant changes in dimensions, with a two-tailed p-value of 0.049. Disinfection with 2–2.5% glutaraldehyde solution was not associated with any significant dimensional variability.

Assessment of dimensional stability of novel VPES impression material at different time intervals with standard disinfectants

“…The immersion technique with a ten-minute disinfection interval was employed in most of the studies. Chemical disinfection has little effect on the dimensional stability of VPES, as described in the findings of a meta-analysis of a review [22]. The current study's findings demonstrated that all groups, including the control group, had clinically acceptable dimensional changes even after 30 minutes with the least change in dimension in 2% glutaraldehyde.…”

“…In the present study, 3 regularly used disinfectants among these commercially available materials were used because they have been shown to considerably reduce the number of pathogens on the surface of elastomeric impression materials little or no change to their physical qualities [21]. The data analysis of previous studies showed that the immersion method was the most often utilised VPES disinfection technique; spray disinfection was only reported in one study in conjunction with the immersion method [22].…”

“…In the systematic review on VPES IM, it was documented that NaOCl-mediated disinfection was linked to significant dimensional variability in VPES impressions, despite the overall results for immersion disinfection showing no significant effect on dimensional variations. When calculating disinfectantinduced dimensional changes, the immersion time is a key factor, storage time after which the measurements were taken [22]. The type of solution used for the immersion of dental prosthesis material determines the degree of dimensional changes in dental impressions; nevertheless, evidence from published studies about other elastomeric impression materials shows that immersion time has no clinically relevant effect on these changes [22].…”

“…When calculating disinfectantinduced dimensional changes, the immersion time is a key factor, storage time after which the measurements were taken [22]. The type of solution used for the immersion of dental prosthesis material determines the degree of dimensional changes in dental impressions; nevertheless, evidence from published studies about other elastomeric impression materials shows that immersion time has no clinically relevant effect on these changes [22]. These findings were in correlation with the results of the present study as the dimensional changes in the test samples were within clinically acceptable range both for 10 mins and 30 mins.…”

“…These findings were in correlation with the results of the present study as the dimensional changes in the test samples were within clinically acceptable range both for 10 mins and 30 mins. A thirty-minute glutaraldehyde disinfection time was recorded in only one investigation, whereas a three-minute Cavex disinfection time was observed in another [22,25]. The immersion technique with a ten-minute disinfection interval was employed in most of the studies.…”