[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
:: Volume 25, Issue 2 (4-2013) ::
J Islam Dent Assoc Iran 2013, 25(2): 117-123 Back to browse issues page
Comparison of Physical Properties of an Iranian and a German Dental Stone Type IV According to ADA Specifications
Mahmood Sabouhi1, Niloofar Khodaeian 2, Maryam Soltani3, Ebrahim Ataei4
1- Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran
2- Dental Implant Research Center and Assistant Professor, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran , khodaeian@dnt.mui.ac.ir
3- Dentist
4- Assistant Professor, Department of Operative Dentistry, School of Dentistry, Shahid Sadoughi, University of Medical Sciences. Yazd, Iran
Abstract:   (10572 Views)
  Background and Aim: Dental stone type IV and V are predominantly used for construction of cast and die in fixed prosthodontics and must have some special properties. The aim of this study was to compare the three physical properties of an Iranian a German dental stone type IV .

  Materials and Methods: In this experimental study, setting time, setting expansion and compressive strength properties were evaluated according to ADA specification No.25for Iranian Tara and German Gildand type IV dental stone. For setting time, setting expansion and compressive strength tests, Vicat apparatus, extensometer and universal testing machine were used, respectively. Data were compared to ADA specification No.25 for dental stone type IV and statistically analyzed using t-test with a 0.05 level of significance .

  Results: Mean of setting expansion for Iranian and German dental stone were 0.024±0.011 and 0.0245±0.009, respectively and were within the limits of ADA specification and there was no statistically significant difference between them (P=0.966). Mean of setting time for Iranian and German dental stone were 44.5±0.70 and 17.29±0.41 and mean of compressive strength for Iranian and German dental stone were 16.17±0.97 and 20.15±1.96 and both specifications were not within the limits of ADA specification, but statistically significant differences were found between groups (P<0.001) .

  Conclusion: Iranian dental stone type IV could not fulfill 2 out of 3 tested ADA specification and modification of this stone is necessary for use in fixed prosthodontics laboratory processes .

 

 

 

Keywords: Calsium Sulfate, compressive strength, physical properties
Full-Text [PDF 178 kb]   (1541 Downloads)    
Type of Study: Orginal | Subject: Porosthodontics
References
1. Anusavice KJ. Gypsum products. In: Phillips’ science of dental materials. 11th ed. St. Louise: Mosby Elsevier; 2006, 255-81.
2. American National Standards/American Dental Association, Specification 25 for dental gypsum products. New York: American National Stand-ards Institute; 2000, 244-53.
3. Winkler MM, Monaghan P, Gilbert JL, Lauten-schlager EP. Comparison of four techniques for monitoring the setting kinetics of gypsum. J Prosthet Dent. 1998 May;79(5):532-6.
4. He LH, van Vuuren LJ, Planitz N, Swain MV. A micro-mechanical evaluation of the effects of die hardener on die stone. Dent Mater J. 2010 Aug; 29(4):433-7.
5. Golbidi F, Kiani M, Ebrahimi M. Evaluation of physical properties of Khodabandeloo plaster (An in vitro study). J Dent Sch Shahid Beheshti Med Sci Univ. ‎2006 Summer;24(2):235-42.
6. Golbidi F, Davari M. Evaluation of three phyis-ical properties of iranian stones. Dent J Islamic Ass of Dent.‎ 2003 Jan;14(4):51-64.
7. Golbidi F. Davari M. Comparision of consistenscy and setting time of iranian and foreign stones. Res Med Sci.‎ 2000 Autumn; 5(3):257-9.
8. American Dental Association: Specification No. 25 for dental gypsum products. In ADA: Guide to Den-tal Materials and Devices. Chicago: ADA; 1973, 253-8.
9. Duke P, Moore BK, Haug SP, Andres CJ. Study of the physical properties of type IV gypsum, resin-containing, and epoxy die materials. J Prosthet Dent. 2000 Apr;83(4):466-73.
10. Abdullah MA. Surface detail, compressive strength, and dimensional accuracy of gypsum casts after repeated immersion in hypochlorite solution. J Prosthet Dent. 2006 Jun;95(6):462-8.
11. Lucas MG, Arioli-Filho JN, Nogueira SS, Batista AU, Pereira Rde P. Effect of incorporation of disinfectant solutions on setting time, linear di-mensional stability, and detail reproduction in dental stone casts. J Prosthod. 2009 Aug; 18(6):521-6.
12. Rudd KD, Morrow RM, Brown CE Jr, Powell JM, Rahe AJ. Comparison of effects of tap wa-ter and slurry water on gypsum casts. J Prosthet Dent. 1970 Nov;24(5):563-70.
13. Heshmati RH, Nagy WW, Wirth CG, Dhuru VB. Delayed linear expansion of improved dental stone. J Prosthet Dent. 2002 Jul;88(1):26-31.
14. Breault LG, Paul JR, Hondrum SO, Christensen LC. Die stone disinfection: Incorporation of sodium hypochlorite. J Prosthod. 1998 Mar; 7(1): 13-6.
15. Powers JM, Sakaguchi RL. Gypsum products and inverstment. In: Craig's restorative dental materials. 12th ed. St. Louis: Mosby Elsevier; 2006, 313-36.
16. Von Fraunhofer JA, Spiers RR. Strength testing of dental stone: A comparison of compressive, tensile, transverse, and shear strength tests. J Biomed Mater Res. 1983 Mar;17(2):293-9.
17. Brukl CE, McConnell RM, Norling BK, Collard SM. Influence of gauging water composition on dental stone expansion and setting time. J Pros-thet Dent. 1984 Feb;51(2):218-23.
18. Scaranelo RM, Bombonatti PE, Rister RP, Bom-bonatti R, Bombonatti JF. Influência de soluções desinfetantes cloradas no tempo e na expansão de presa de dois tipos de gesso. Rev Odont de Araç. 2004 Jun-Jul;25(1):44-8.
19. Twomey JO, Abdelaziz KM, Combe EC, An-derson DL. Calcium hypochlorite as a disinfect-ing additive for dental stone. J Prosthet Dent. 2003 Sep; 90(3):282-8.
20. O'Brien WJ. Gypsum products. In: Dental materials and their selection. 4th ed. Chicago: Quintessence; 2008, 38-61.
21. Jacobs MS, Windeler AS. An investigation of dental luting cement solubility as a function of the marginal gap. J Prosthet Dent. 1991 Mar; 65(3): 436-42.
22. Phillips RW, Swartz ML, Lund MS, Moore BK, Vickery J. In vivo disintegration of luting cements. J Am Dent Assoc. 1987 Apr; 114(4):489-92.
23. Preston JD. Rational approach to tooth prep-aration for ceramo-metal restorations. Dent Clin North Am. 1977 Oct;21(4):683-98.
24. Goldman M, Laosonthorn P, White RR. Mi-croleakage–full crowns and the dental pulp. J Endod. 1992 Oct; 18(10):473-5.
25. Khu CH, King NM, Lee AM, Yiu CK, Wei SH. A pilot study of the marginal adaptation and surface morphology of glass-cermet ce-ments. Quintessence Int. 1996 Jul;27(7):493-501.
26. Lang NP, Kiel RA, Anderhalden K. Clinical and microbiological effects of subgingival res-torations with overhanging or clinically perfect margins. J Clin Periodontol. 1983 Nov; 10(6):563-78.
27. Schwartz NL, Whitsett LD, Berry TG, Stew-art JL. Unserviceable crowns and fixed partial dentures: Life-span and causes for loss of ser-viceability. J Am Dent Assoc. 1970 Dec; 81(6):1395-401.
28. Walton JN, Gardner FM, Agar JR. A survey of crown and fixed partial denture failures: Length of service and reasons for replacement. J Prosthet Dent. 1986 Oct;56(4):416-21.
29. Castillo-de-Oyagüe R, Sánchez-Turrión A, López-Lozano JF, Albaladejo A, Torres-Lagares D, Montero J, et al. Vertical misfit of laser-sintered and vacuum-cast implant-supported crown copings luted with definitive and tempo-rary luting agents. Oral Med Oral Patol Oral Cir Bucal. 2012 Jul 1; 17 (4):e610-7.
30. Beuer F, Aggstaller H, Edelhoff D, Gernet W, Sorensen J. Marginal and internal fits of fixed dental prostheses zirconia retainers. Dent Mater. 2009 Jan; 25(1):94-102.
31. Mahler DB, Ady AB. An explanation for the hygroscopic setting expansion of dental gypsum products. J Dent Res. 1960 May-Jun;39(3):578-89.
32. Lautenschlager EP, Corbin F. Investigation on the expansion of dental stone. J Dent Res. 1969 Mar-Apr; 48(2):206-10.
33. Ragain JC, Grosko ML, Raj M, Ryan TN, Johnston WM. Detail reproduction, contact an-gles, and die hardness of elastomeric impression and gypsum die material combinations. Int J Pros-thodont. 2000 May-Jun;13(3):214-20.
34. Aramouni P, Millstein P. A comparison of the accuracy of two removable die systems with intact working casts. Int J Prosthodont. 1993 Nov-Dec; 6 (6):533-9.
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Sabouhi M, Khodaeian N, Soltani M, Ataei E. Comparison of Physical Properties of an Iranian and a German Dental Stone Type IV According to ADA Specifications. J Islam Dent Assoc Iran. 2013; 25 (2) :117-123
URL: http://jidai.ir/article-1-1380-en.html


Volume 25, Issue 2 (4-2013) Back to browse issues page
Journal of Islamic Dental Association of Iran

AWT IMAGE

This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly

Persian site map - English site map - Created in 0.06 seconds with 32 queries by YEKTAWEB 4006