Volume 6, Issue 1 (Journal of Research in Dental & Maxillofacial Sciences Winter 2021)                   J Res Dent Maxillofac Sci 2021, 6(1): 4-13 | Back to browse issues page

XML Print

1- Dentist
2- Assistant professor, Prosthodontics Dept, Faculty of Dentistry, Tehran Medical Sciences
3- Professor of oral medicine Dept, Faculty of Dentistry, Tehran Medical Sciences,
4- Associate Professor, Prosthodontics Dept, Member ship of Dental Material Research Center, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University , Tehran, Iran. , Drshlawaf@yahoo.com
Abstract:   (880 Views)
Background and Aim: Shade guide discoloration after disinfection can interfere with the appropriate color selection for dental restorations. Since one of the most important issues for patients is the color of the final restoration, the discoloration of shade guides due to disinfectants will be important. Infection control is a definite and important matter in dentistry. Due to the contradictory results of studies on the effect of disinfectants on shade guide discoloration, this study aimed to examine the discoloration of the Vita classical shade guide by glutaraldehyde disinfectant. 
Materials and Methods: In this experimental study, samples of A4, B4, C4, and D4 colors were selected from the Vitapan classical shade guide, 10 pieces each (40 samples in total). Three samples of each color were immersed in distilled water as a control while the other seven were immersed in a 2% glutaraldehyde disinfectant solution. The shade pilot spectrophotometer was used for colorimetry, which was performed at baseline and 24, 48, and 72 hours after the immersion. The color of the samples was evaluated based on the CIE Lab system. The data were analyzed with two-way analysis of variance (ANOVA) and Tukey's test.
Results: The rate of color change (ΔE) of the samples was higher in the glutaraldehyde group than in distilled water (P<0.05). In addition, color change in both groups showed a significant difference at different times (P<0.05).
Conclusion: The Vitapan classical color samples discolor by immersion in 2% glutaraldehyde disinfectant after 24, 48, and 72 hours, but this color change is not clinically detectable (ΔE<1).
Full-Text [PDF 530 kb]   (409 Downloads) |   |   Full-Text (HTML)  (222 Views)  
Type of Study: Original article | Subject: Dental implant

1. Pohjola RM, Hackman ST, Browning WD. Evaluation of a standard shade guide for color change after disinfection. Quintessence Int. 2007 Sep;38(8):671-6.
2. Koosha S, Pourmahdi Borujeni M, Amraii H. Evaluation shade guide color changes after application of disinfectant materials. Jentashapir. 2012;3(4):505-11.
3. Browning WD. Use of shade guides for color measurement in tooth-bleaching studies. J Esthet Restor Dent. 2003;15 Suppl 1:S13-20. [DOI:10.1111/j.1708-8240.2003.tb00314.x] [PMID]
4. Ma T, Johnson GH, Gordon GE. Effects of chemical disinfectants on surface characteristics and color of three fixed prosthodontic crown materials. J Prosthet Dent. 1999 Nov;82(5):600-7. [DOI:10.1016/S0022-3913(99)70061-2]
5. Paul SJ, Peter A, Rodoni L, Pietrobon N. Conventional visual vs spectrophotometric shade taking for porcelain-fused-to-metal crowns: a clinical comparison. Int J Periodontics Restorative Dent. 2004 Jun;24(3):222-31.
6. Swepston JH, Miller AW 3rd. Esthetic matching. J Prosthet Dent. 1985 Nov;54(5):623-5. [DOI:10.1016/0022-3913(85)90234-3]
7. Hombesh MN, Praveen B, Sinha HV, Prasanna BG, Sachin B, Chandrashekar S. Two years survivability of VITA 3D master shade matching guides after disinfection with isopropyl alcohol: An in vitro study. J Conserv Dent. 2019 May-Jun;22(3):275-80. [DOI:10.4103/JCD.JCD_573_18] [PMID] [PMCID]
8. Brandt J, Nelson S, Lauer HC, von Hehn U, Brandt S. In vivo study for tooth colour determination-visual versus digital. Clin Oral Investig. 2017 Dec;21(9):2863-71. [DOI:10.1007/s00784-017-2088-0] [PMID]
9. Huang PY, Masri R, Romberg E, Driscoll CF. The effect of various disinfectants on dental shade guides. J Prosthet Dent. 2014 Sep;112(3):613-7. [DOI:10.1016/j.prosdent.2014.04.006] [PMID]
10. Öngül D, Şermet B, Balkaya MC. Visual and instrumental evaluation of color match ability of 2 shade guides on a ceramic system. J Prosthet Dent. 2012 Jul;108(1):9-14. [DOI:10.1016/S0022-3913(12)60102-4]
11. Mostafavi A, Koosha S, Amjad M. Effect of Disinfection on the Surface Roughness of Dental Casts Retrieved from Addition Silicone Impressions. J Res Dentomaxillofac Sci. 2018;3(1):27-33. [DOI:10.29252/jrdms.3.1.27]
12. Aguilar FG, Roberti Garcia Lda F, Cruvinel DR, Sousa AB, de Carvalho Panzeri Pires-de-Souza F. Color and opacity of composites protected with surface sealants and submitted to artificial accelerated aging. Eur J Dent. 2012 Jan;6(1):24-33.

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.