AbstractThis study aimed to assess the dimensional accuracy of five commercial alginates verified in stone casts. Methods: Each alginate impression (Cavex ColorChange, Cavex Holland BV; Jeltrate Plus, Dentsply; Hydrogum, Zhermack; Kromopan 100, Lascod; Ezact Kromm, Vigodent) was performed on partially edentulous standard stainless steel mandibular arch cast with reference points on teeth 33, 43, 37 and 47. On the stainless steel cast, the anteroposterior (33-37 and 43-47) and transverse (33-43 and 37-47) distances were measured in a stereomicroscope at 30x magnification and 0.5 μm accuracy. The distances between these points were measured three times, obtaining an average, which was analyzed statistically and compared with the distances obtained from the stone casts. For each alginate the casts were poured gypsum (n = 5) immediately and after a period of 1, 2, 3 and 5 days of the impression procedure. Results: The dimensional accuracy values of stone and stainless steel casts were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05). The results showed significant differences between the alginates; however, no differences in dimensional accuracy were found among the different storage times of alginate impression. Conclusions: It can be concluded that the alginate impressions can be stored for up to 5 days.
Craig RG. Review of dental impression materials. Adv Dent Res. 1988 Aug;2(1):51-64.
Nassar U, Aziz T, Flores-Mir C. Dimensional stability of irreversible hydrocolloid impression materials as a function of pouring time: a systematic review. J Prosthet Dent. 2011 Aug;106(2):126-33. doi: 10.1016/S0022-3913(11)60108-X.
Wadhwa SS, Mehta R, Duggal N, Vasudeva K. The effect of pouring time on the dimensional accuracy of casts made from different irreversible hydrocolloid impression materials. Contemp Clin Dent. 2013 Jul;4(3):313-8. doi: 10.4103/0976-237X.118368.
Amalan A, Ginjupalli K, Upadhya N. Evaluation of properties of irreversible hydrocolloid impression materials mixed with disinfectant liquids. Dent Res J (Isfahan). 2013 Jan;10(1):65-73. doi: 10.4103/17353327.111795.
Rueggeberg FA, Beall FE, Kelly MT, Schuster GS. Sodium hypochlorite disinfection of irreversible hydrocolloid impression material. J Prosthet Dent. 1992 May;67(5):628-31.
Rubel SB. Impression materials: a comparative review of impression materials most commonly used in restorative dentistry. Dent Clin North Am. 2007 Jul;51(3):629-42, vi.
Walker MP, Burckhard J, Mittis DA, Williams KB. Dimensional change over time of extended storage alginate impression materials. Angle Orthod. 2010 Nov;80(6):1110-5. doi: 10.2319/031510-150.1.
Miller MW. Syneresis in alginate impression materials. Br Dent J. 1975 Dec 2;139(11):425-30.
Sedda M, Casarotto A, Raustia A, Borracchini A. Effect of storage time on the accuracy of casts made from different irreversible hydrocolloids. J Contemp Dent Pract. 2008 May 1;9(4):59-66.
Shaba OP, Adegbulugbe IC, Oderinu OH. Dimensional stability of alginate impression material over a four hours time frame. Nig Q J Hosp Med. 2007 Jan-Mar;17(1):1-4.
Chen SY, Liang WM, Chen FN. Factors affecting the accuracy of elastometric impression materials. J Dent. 2004; 32, 603-9.
Kulkarni MM, Thombare RU. Dimensional changes of alginate dental impression materials-An in vitro study. J Clin Diagn Res. 2015; 9, ZC98102.
Imbery TA, Nehring J, Janus C, Moon PC. Accuracy and dimensional stability of extended-pour and conventional alginate impression materials. J Am Dent Assoc. 2010 Jan;141(1):32-9.
Consani RLX, Domitti SS, Mesquita MF, Consani S. Influence of flask closure and flask cooling methods on tooth movement in maxillary dentures. J Prosthodont. 2006 Jul-Aug;15(4):229-34.
Boscato N, Consani RLX, Consani S, Del Bel Cury AA. Effect of investment material and water immersion time on tooth movement in complete denture. Eur J Prosthodont Restor Dent. 2005 Dec;13(4):164-9.
Vitti RP, da Silva MA, Consani RL, Sinhoreti MA. Dimensional accuracy of stone casts made from silicone-based impression materials and three impression techniques. Braz Dent J. 2013 Sep-Oct;24(5):498-502. doi: 10.1590/0103-6440201302334.
Faria AC, Rodrigues RC, Macedo AP, Mattos Mda G, Ribeiro RF. Accuracy of stone casts obtained by different impression materials. Braz Oral Res. 2008 Oct-Dec;22(4):293-8.
Guiraldo RD, Moreti AF, Martinelli J, Berger SB, Meneghel LL, Caixeta RV, et al. Influence of alginate impression materials and storage time on surface detail reproduction and dimensional accuracy of stone models. Acta Odontol Latinoam. 2015;28(2):156-61. doi: 10.1590/ S1852-48342015000200010.
Teraoka F, Takahashi J. Dimensional changes and pressure of dental stones set in silicone rubber impressions. Dent Mater. 2000 Mar;16(2):145-9.
Guiraldo RD, Borsato TT, Berger SB, Lopes MB, Gonini-Jr A, Sinhoreti MA. Surface detail reproduction and dimensional accuracy of stone models: influence of disinfectant solutions and alginate impression materials. Braz Dent J. 2012;23(4):417-21.
International Organization for Standardization. Dental alginate impression material. ISO 1563:1990(E). 2. ed.; 1990.
Kawara M, Iwasaki M, Iwata Y, Komoda Y, Inoue S, Komiyama O, et al. Rheological properties of elastomeric impression materials for selective pressure impression technique. J Prosthodont Res. 2015 Oct;59(4):25461. doi: 10.1016/j.jpor.2015.07.002.
Carlo HL, Fonseca RB, Gonçalves LS, Correr-Sobrinho L, Soares CJ, Sinhoreti MA. Analysis of filler particle levels and sizes in dental alginates. Mater Res. 2010 Apr/Jun;13(2):261-4.
Tan HK, Hooper PM, Buttar IA, Wolfaardt JF. Effects of disinfecting irreversible hydrocolloid impressions on the resultant gypsum casts: part III–Dimensional changes. J Prosthet Dent. 1993 Dec;70(6):532-7.
Kambhampati S, Subhash V, Vijay C, Das A. Effect of temperature changes on the dimensional stability of elastomeric impression materials. J Int Oral Health. 2014 Feb;6(1):12-9.
The Brazilian Journal of Oral Sciences uses the Creative Commons license (CC), thus preserving the integrity of the articles in an open access environment.