Compatibility of Types III/IV Gypsum with Addition Silicone Impression Material

Elysia Santini, Octarina Octarina

Abstract


Background: Addition silicone is an elastomeric impression material used to obtain an accurate impression. Compatibility between impression material and gypsum will affect the surface quality of the resulting models. Types III and IV gypsum are very commonly used in dentistry to pour impressions and produce working models; despite this, there has been no further research regarding the differences between the two types in terms of compatibility with addition silicone impression materials. Objectives: To compare the compatibility of types III and IV gypsum with addition silicone impression materials.  Methods: Gypsum compatibility was assessed on the basis of its ability to reproduce lines of certain widths. Thirty samples were produced by impressing a stainless steel ruled block (in accordance with ANSI/ADA Specification No. 19) with addition silicone (independent variable) and then pouring in type III or IV gypsum (dependent variable). The samples were divided into two groups: in Group A, addition silicone was poured with type III gypsum; in Group B, addition silicone was poured with type IV gypsum. The lines from the stainless steel ruled block that formed in the gypsum samples were observed with a microscope at 10x magnification. Each line was then assessed with a score from 1 to 4, according to Morrow’s standardization, where a score of 1 indicates that the line was reproduced clearly and sharply over its entire 25 mm length, and a score of 4 indicates that the line is reproduced incompletely with roughness and/or blemishes. The data were analyzed using the Mann–Whitney U test. Results: Group B (addition silicone poured with type IV gypsum) produced more results rated as 1 (60% of the group’s samples) than Group A (only 46.67% of the group’s samples). Conclusion: On the basis of the number of scores rated as 1, type IV gypsum was more compatible than type III gypsum with addition silicone.


Keywords


addition silicone; dental gypsum; gypsum compatibility

Full Text:

PDF

Article Metrics

Abstract views : 637| PDF views : 0

References


Powers JM, John CW. Dental materials : properties and manipulation. Missouri: Elsevier Mosby; 2013. p. 93-100.

Manappallil JJ. Basic dental materials. New Delhi: Jaypee Brothers; 2016. p. 267-315.

Bastin KG. Dental materials : a pocket guide. Missouri: Elsevier Saunders; 2015. p. 190-205

Pandey A, Mehtra A. Comparative study of dimensional stability and accuracy of various elastomaric materials. IOSR Journal of Dental and Medical Sciences (IOSR- JDMS). 2014;13(3):40-45. DOI:10.9790/0853-13354045

Patel RD, Kattadiyil MT, Goodacre CJ, Winer MS. An in vitro investigation into the physical properties of irreversible hydrocolloid alternatives. J Prosthet Dent. 2010 Nov;104(5):325-32. DOI: 10.1016/S0022-3913(10)60149-7

Hatrick CD, Eakle S. Dental Material : Clinical application for dental assistants & dental hygienist. 3rd ed. Missouri: Elsevier; 2016. p.245-285.

McCabe JF, Walls AWG. Applied Dental Materials. 9th Ed. Oxford: Blackwell; 2008. p. 32–39.

Jacob SA, Nayar SV, Nandini VV. Comparison of the dimensional accuracy and surface detail reproduction of different impression materials under dry and moist conditions - an in vitro study. Int. J Contemp Dent. 2012; 3(2): 55

Chang YC, Yu CH, Liang WM, Tu MG, Chen SY. Comparison of the surface roughness of gypsum models constructed using various impression materials and gypsum products. J Dent Sci. 2016; 11(1): 23–28. DOI: 10.1016/j.jds.2012.11.002

Amin WM, Al-Ali MH, Al Tarawneh SK, Taha ST, Saleh MW, Ereifij N. The effects of disinfectants on dimensional accuracy and surface quality of impression materials and gypsum casts. J Clin Med Res. 2009 Jun;1(2):81-9. DOI: 10.4021/jocmr2009.04.1235

Power JM, Sakaguchi RL. Craig’s restorative dental materials. 12th ed. St. Louis: Mosby Elsevier; 2009. p. 283-296.

Scheller-Sheridan C. Basic guide to dental materials. Oxford: Wiley-Blackwell; 2010. p. 232.

Ywom J. Evaluation of accuracy of impression materials with different mixing techniques [MSc Thesis]. Loma Linda: Loma Linda University Electronic Theses & Dissertations. 2013

Mishra S, Chowdhary R. Linear dimensional accuracy of a polyvinyl siloxane of varying viscosities using different impression techniques. J Investig Clin Dent. 2010 Aug;1(1):37-46. DOI: 10.1111/j.2041-1626.2010.00004.x

Raigrodski AJ, Dogan S, Mancl LA, Heindl H. A clinical comparison of two vinyl polysiloxane impression materials using the one-step technique. J Prosthet Dent. 2009;102(3):179-86. DOI:10.1016/S0022-3913(09)60143-8

Rejab LT, Al-hamdani SF, Yahia M. Evaluation of Some Physical Properties of Die Stone Made From Local Raw Gypsum Material. Al–Rafidain Dent J. 2012; 12(2): 309-315.




DOI: http://dx.doi.org/10.26912/sdj.v3i1.3664

Refbacks

  • There are currently no refbacks.


Copyright (c) 2019

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Copyright of Scientific Dental Journal. (e-ISSN: 2541–321X, p-ISSN: 2580–6548)

Scientific Dental Journal is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Creative Commons License