Journal of Clinical Medicine Research, ISSN 1918-3003 print, 1918-3011 online, Open Access
Article copyright, the authors; Journal compilation copyright, J Clin Med Res and Elmer Press Inc
Journal website http://www.jocmr.org

Original Article

Volume 1, Number 2, June 2009, pages 81-89

The Effects of Disinfectants on Dimensional Accuracy and Surface Quality of Impression Materials and Gypsum Casts

Figures

Figure 1.
Figure 1. The parts "1, 2, 3" of the assembly constructed according to the ADA specification number 18 for testing dimensional stability and reproduction of details of impression materials. The diagram "4" representing the surface of the die showing the three vertical lines.
Figure 2.
Figure 2. Dimensional changes for casts made from alginate impression material after disinfection.
Figure 3.
Figure 3. Dimensional changes for casts made from addition silicone impression material after disinfection.
Figure 4.
Figure 4. Dimensional changes for casts made from condensation silicone impression material after disinfection.
Figure 5.
Figure 5. Dimensional changes for casts made from Zinc Oxide Eugenol impression materials after disinfection.
Figure 6.
Figure 6. The distribution of impression materials according to their surface quality grades scored after disinfection.
Figure 7.
Figure 7. Surface quality and detail reproduction (X10 magnification): 1- sharp detail, continuous line; 2- continuous lines but with some loss of sharpness; 3- rough appearance with loss of continuity of the line.

Tables

Table 1. Impression materials and their recommended setting times
 
Impression materialBrand name/SupplierBatch NumberRecommended setting time
AlginateAlginoplast® fast set/Heraeus Kulzer/Holland25575912 min
Add. SiliconeElite H-D+/Zhermack
Badia Polesine (Rovigo) Italy		C2030358 min
Cond. SiliconeBonasil light
DMP LTD, E.U.		82350305
34930604		8 min
Zinc Oxide–EugenolSS White Group/England1206035 min

 

Table 2. The employed disinfectants and their recommended immersion times.
 
DisinfectantBrand name/SupplierConc.Batch NumberRecommended immersion time
Chlorhexidine GluconateHexana/ M.H. Sider Health Care Prep./Jordan0.2%H 01425 min
Chlorhexidine GluconateCorsodyl/Glaxo Smith Kline/UK0.2%335E5 min
Sodium HypochloriteHypex/Jordan Chemical Industries Co. Ltd/Jordan1.0%5 min
Sodium HypochloriteHypex/Jordan Chemical Industries Co.Ltd/Jordan0.5%10 min
GluteraldehydeEimaldehyde solution Al-Eiman for cosmetics/Jordan2.2%050909475 min

 

Table 3. The mean dimensional change for each impression material / disinfectant combination illustrating the dimensional change between the stone cast and the original die
 
DisinfectantAlginate
(mm)×10-3		Addition Silicone
(mm)×10-3		Condensation Silicone
(mm)×10-3		Zinc Oxide Eugenol
(mm)×10-3
Hexana7.1-3.94.7-1.5
Corsodyl10.8-54-5
Sterile water3.8-3-3-8
1% Na-Hypochlorite4.8-5.8-21.1
0.5% Na-Hypochlorite2.3-2.40.6-2.1
Gluteraldehyde3-81.2-2.5