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Tanu Gupta
Ashish Choudhary
Anurag Hasti
Prabhakar Gupta


Infection Control, Surface Roughness, Dimensional Stability, Dental Plaster, Dental Stone, Die Stone


Introduction- Infection control attitudes at dental clinics and dental labs are changing as a result of the increased understanding of the hazards of cross-contamination with hepatitis B virus (HBV) and human immunodeficiency virus (HIV).

Objective-To examine how well dental stone, die stone, and plaster of Paris models cleaned using the spray approach and included with Glutaraldehyde reproduce surface detail and dimensional stability in their experiments.

 Methodology- In-vitro experimental study was conducted in the Department of Prosthodontics and Crown And Bridge, Teerthanker Mahaveer Dental College And Research Centre, TMU, Moradabad to evaluate and compare the effect of glutaraldehyde on the dimensional stability and surface roughness of die stone, dental stone and dental plaster. Sample size was 100, contact profilometer was used to measure the surface roughness and Vision Inspecting system was used to measure the dimensional stability of the samples.

 Results- The significant difference in plaster between the three groups was observed between Control and Incorporation groups (S.R high in Incorporation group) spray and Incorporation groups (S.R high in Incorporation group), for Dental Plaster and stone, there is no significant difference in dimension between the three techniques. For die stone alone, a significant difference was observed.

 Conclusion- in our study found that surface roughness of dental plaster and die stone was higher and dimensional stability of die stone was lower after it was disinfected with glutaraldehyde, however spray disinfection has no ill effect on physical properties of gypsum products, further studies and more researches are required to improve the effectiveness of spray disinfection.

Keywords- Infection Control, Surface Roughness, Dimensional Stability, Dental Plaster, Dental Stone, Die Stone, Glutaraldehyde, Spray, Incorporation Technique

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1. Mitchell DL, Hariri NM, Dunacson MG, Jacobsen NL, MacCallum RE. 1997. Quantitative Study of Bacterial Colonozation of dental casts. The Journal of Prosthetic dentistry,78(5): 518-521
2. Rowe AH, Forrest JO. Dental impressions. The probability of contamination and a method of disinfection. Br Dent J 1978; 145:184-6.
3. Beyerle MP, Hensley DM, Bradley DV Jr, Schwartz RS, Hilton TJ. Immersion disinfection of irreversible hydrocolloid impressions with sodium hypochlorite. Part I: Microbiology. Int J Prosthodont. 1994;7(3):234-238.
4. Kohn WG, Harte JA, Malvitz DM, et al. Guidelines for infection control in dental health care settings--2003. J Am Dent Assoc. 2004;135(1):33-47. doi:10.14219/jada.archive.2004.0019.
5. Taylor RL, Wright PS, Maryan C. Disinfection procedures: their effect on the dimensional accuracy and surface quality of irreversible hydrocolloid impression materials and gypsum casts. Dent Mater. 2002;18(2):103-110. doi:10.1016/s0109-5641(01)00027-6.
6. Owen CP, Goolam R. Disinfection of impression materials to prevent viral cross contamination: a review and a protocol. Int J Prosthodont. 1993;6(5):480-494.
7. Abdelaziz KM, Combe EC, Hodges JS. The effect of disinfectants on the properties of dental gypsum: 1. Mechanical properties. J Prosthodont. 2002;11(3):161-167.
8. Ivanovski S, Savage NW, Brockhurst PJ, Bird PS. Disinfection of dental stone casts: antimicrobial effects and physical property alterations. Dent Mater. 1995;11(1):19-23. doi:10.1016/0109-5641(95)80004-2.
9. Twomey JO, Abdelaziz KM, Combe EC, Anderson DL. Calcium hypochlorite as a disinfecting additive for dental stone. J Prosthet Dent. 2003;90(3):282-288. doi:10.1016/s0022-3913(03)00412-8.
10. Khalaf, Hanan & Mohammed, Assistant Prof. Mithaq R.. (2014). Effect of Disinfectant Agents on Certain Physical and Mechanical Properties of Type IV Dental Stone. Journal of Baghdad College of Dentistry. 26. 24-31. 10.12816/0015141.
11. Mansfield SM, White JM. Antimicrobial effects from incorporation of disinfectants into gypsum casts. International Journal of Prosthodontics. 1991 Mar 1;4(2).
12. Lucas MG, Arioli-Filho JN, Nogueira SS, Batista AU, Pereira Rde P. Effect of incorporation of disinfectant solutions on setting time, linear dimensional stability, and detail reproduction in dental stone casts. J Prosthodont. 2009;18(6):521-526. doi:10.1111/j.1532-849X.2009. 00466.x.
13. O’Brien WJ: Gypsum products. In O’Brien WJ (ed): Dental Materials and Their Selection (ed 2). Chicago, Quintessence, 1997, pp. 51-74
14. Ansavice KJ: Phillips’ Science of Dental Materials (ed 10). Philadelphia, Saunders, 1996, pp. 33, 69-71, 598-600.
15. Zhai, C.; Gan, Y.; Hanaor, D.; Proust, G.; Retraint, D. (2016). "The Role of Surface Structure in Normal Contact Stiffness". Experimental Mechanics. (3): 359–368. doi:10.1007/s11340-015-0107-0. S2CID 51901180.
16. Hanaor, D.; Gan, Y.; Einav, I. (2016). "Static friction at fractal interfaces". Tribology International:229238. arXiv:2106.01473. doi:10.1016/j.triboint.2015.09.016. S2CID 51900923
17. Taufik, Mohammad; Jain, Prashant K. (2016). "A Study of Build Edge Profile for Prediction of Surface Roughness in Fused Deposition Modeling". Journal of Manufacturing Science and Engineering. (6). doi:10.1115/1.4032193.
18. Jump up to:Whitehouse, David (2012). Surfaces and their Measurement. Boston: Butterworth-Heinemann. ISBN 978-0080972015.
19. Jean M. Bennett, Lars Mattsson, Introduction to Surface Roughness and Scattering, Optical Society of America, Washington, D.C.
20. J Walecki, F Szondy and M M Hilali, "Fast in-line surface topography metrology enabling stress calculation for solar cell manufacturing for throughput in excess of 2000 wafers per hour" 2008 Meas. Sci. Technol. 19 025302 (6pp) doi:10.1088/0957-0233/19/2/025302
21. Stout, K. J.; Blunt, Liam (2000). Three-Dimensional Surface Topography (2nd ed.). Penton Press. p. 22. ISBN 978-1-85718-026-8