Effect Of Storage In Water On Solubility And Effect Of Thermocycling On Microhardness Of Four Different Temporary Restorative Materials
Effect Of Storage In Water On Solubility And Effect Of Thermocycling
Keywords:
Solubility, Micro hardness, Temporary restorative materials, Thermocycling, Coefficient of thermal expansionAbstract
Background: To compare the microhardness and solubility of temporary restorative materials after thermocycling. Objective is to evaluate and compare the solubility of temporary restorative materials after storage in water and to evaluate and compare micro hardness of temporary restorative materials after thermocycling. Methodology: Forty specimens will be prepared for the study. Specimens are prepared according to following four groups.(n=10). Group I – Cavit, Group II - MD Temp, Group III-Coltosol, Group IV – TMP- RS. All the temporary restorative material are manipulated according to manufacturer’s instructions in the stainless steel moulds. All the samples are measured by weight. They are stored in distilled water for 7 days and again they are measured by weight after 7 days. The change in weight is evaluated. All the samples are thermocycled at 4 & 56 degree celsius with a dwell time of 60 seconds for 100 times. After thermocycling micro hardness is calculated by Vickers hardness test of all samples. Results: The study gives highly significant result with p value less than 0.001 of both solubility and micro hardness difference as detailed below. The least solubility is with Cavit G with value 0.011 followed by Coltosol F (0.039), TMP-RS(0.054) and MD Temp(0.122). The least change in micro hardness is with Cavit-G(13.48) followed by Coltosol F(15.54), MD Temp(18.07) and TMP-RS(20.41). All values are compared using one way ANOVA (p<0.001 highly significant). Conclusion: Within the limitations of study, Cavit-G has least solubility after storage in water and highest microhardness after thermocycling among four different temporary restorative materials. [Jani M NJIRM 2015; 6(2):75-78 ]
References
2. Deveaux, E., Hildebert, P., Neut, C., and Romond, C. Bacterial microleakage of Cavit, IRM, Term, and Fermit: a 21-Day in vitro study. J Endod. 1999; 25: 653–659
3. Mayer, T. and Eickholz, P. Microleakage of temporary restorations after thermocycling and mechanical loading. J Endod. 1997; 23: 320–322
4. Deveaux, E., Hildebert, P., Neut, C., Boniface, B., and Romond, C. Bacterial microleakage of Cavit, IRM, Term. Oral Surg Oral Med Oral Pathol Oral RadiolEndod. 1992; 74: 634–643
5. Lee, Y.C., Yang, S.F., Hwang, Y.F., Chueh, L.H., and Chung, K.H. Microleakage of endodontic temporary restorative materials. J Endod. 1993; 19: 516–520
6. Noguera, A.P. and McDonald, N.J. A comporative in vitro coronal microleakage study of new endodontic restorative materials. J Endod. 1990; 16: 523–527
7. Zmener, O, Banegas, G, and Pameijer, C.H. Coronal microleakage of three temporary restorative materials: an in vitro study. J Endod. 2004; 30: 582–584
8. Pai, S.F., Yang, S.F., Sue, W.L., Chueh, L.H., and Rivera, E.M. Microleakage between endodontic temporary restorative materials placed at different times. J Endod. 1999; 25: 453–456
9. Bobotis, H.G., Anderson, R.W., Pashley, D.H., and Pantera, E.A. A microleakage study of temporary restorative materials used in endodontics. J Endod. 1989; 15: 569–572
10. Hagemeier, M.K., Cooley, R.L., and Hicks, J.L. Microleakage of five temporary endodontic restorative materials. J Esthet Dent. 1990; 2: 166–169
11. Beckham, B.M., Anderson, R.W., and Morris, C.F. An evaluation of three materials as barriers to coronal microleakage in endodontically treated teeth. J Endod. 1993; 19: 388–391
12. Teplitsky, P.E. and Meimaris, I.T. Sealing ability of cavit and term as intermediate restorative materials. J Endod.1988; 14: 278–282
13. Gilles, J.A., Huget, E.F., and Stone, R.C. Dimensional stability of temporary restoratives. Oral Surg. 1975; 40: 796–800
14. Erdemir, A., Eldeniz, A.U., and Belli, S. Effect of temporary filling materials on repair bond strengths of composite resins. J Biomed Mater Res B ApplBiomater. 2008; 86B: 303–309
15. Hansen, S.R. and Montgomery, S. Effect of restoration thickness on the sealing ability of Term. J Endod. 1993; 19:448–452 16. JerusaCleci de Oliveira; Glauber Aiello; Bruna Mendes. Effect of storage in water and thermocycling on hardness and roughness of resin materials for temporary restorations. Mat. Res. vol.13 no.3 São Carlos July/Sept. 2010
17. Yap AU, Mah MK, Lye CP and Loh PL. Influence of dietary simulating solvents on the hardness of provisional restorative materials. Dental Materials. 2004; 20(4):370-6
18. Kawano F, Ohguri T, Ichikawa T and Matsumoto N. Influence of thermal cycles in water on flexural strength of temperory restorative materials. Journal of Oral Rehabilitation. 2001; 28(8):703-7.
