The Effect of Seal Bag Storage towards Dimensional Stability of Alginate Impression Material

Octarina Octarina, Jesslyn Raharja


Background: The dimensional stability of alginate impression material is very important for obtaining an accurate cast. Seal bag storage is one way to maintain dimensional stability of the impression material. Objectives: This research aims to compare the dimensional stability of alginate impressions between imprESSIX Color Change (Alginate A), Algeniux Normal Set Major (Alginate B), and Aroma Fine Plus Normal Set (Alginate C). The alginate impressions were stored in seal bags for 0 min, 10 min, 3h, 24h, 72h, 120h, and 168h. Method: Sixty-three gypsum cast samples were obtained from a master die using 3 different alginate impression materials.  The alginate impressions were stored in separate seal bags for each of the seven different time intervals, then the samples were poured with gypsum type III.  The buccal cusp length from right first molar to left first molar was measured for each gypsum cast sample using calipers and compared with the master die. The data were analyzed with two-way ANOVA followed by post hoc LSD test. Results: The distance between the mesial buccal cusps of the right and left first molar was 52.280 mm for the master die.  Gypsum cast samples of alginate A and B showed shorter lengths compared to master die, but the difference was not significant (p>0.05). A significant difference in dimensional stability was observed for alginate C (p<0.05) after 120h (52.080 mm) and 168h (52.057 mm). Conclusion: Dimensional stability of alginate impression was influenced by alginate composition and seal bag storage time. Seal bag storage could hold the dimensional stability of alginate A and B up to 168h, but for alginate C, the stability only lasted for 72h. 


alginate impression material; dimensional stability; seal bag

Full Text:



Imbery TA, Nehring J, Janus, Moon PC. Accuracy and dimensional stability of extended-pour and conventional alginate impression materials. 2010; 699-701.

Hatrick CD, Eakle WS, Bird WF. Dental Materials Clinical Applications for Dental Assitants and Dental Hygienists. America: Saunders Elsevier. 2011. p. 177-80; 183-87; 190.

Mitchell DA, Mitchell L. Oxford handbook of clinical dentistry (e-book). New York: Oxford; 2005; 646.

McCabe JF, Walls AWG. Applied Dental Materials 9th Edition. Oxford: Blackwell Publishing. 2008; 136-37.

Craig RG, Powers JM, Wataha JC. Dental Materials: Properties and Manipulation, 9th ed. St. Louis: Mosby. 2008; 169-85.

Anusavice KJ. Philip’s Science of Dental Materials 12th Edition. Elsevier Inc. 2013; 171-74.

Kulkarni MM, Thombare RU. Dimensional Changes of Alginate Dental Impression Materials-An Invitro Study. J Clin Diagn Res: 2015; 9(8): ZC98–ZC102.

Punj A, Bompolaki D, Garaicoa J. Dental Impression Materials and Techniques. Dent Clin N Am. 2017. Vol 61(4): 779–96.

Presley S, Morgan J. Achiveing accurate alginate impression. Densply Raintree Esix. 2013; 1-5.

Noort RV. Introduction to Dental Materials. 4th edition. Elsevier Mosby. 2013; 140-44.

Nandini VV, Venkatesh KV, Nair KC. Alginate impressions: A practical perspective. 2008.

Rohanian A, et al. Effect of Storage Time of Extended-Pour and Conventional Alginate Impression on Dimensional Accuracy of Casts. Jurnal Kedokteran Gigi: 2014; 655-57.

Reddy CG, Gujjari KA, Shambhu HS. Influence of long term storage on the linear dimensional accuracy of improved alginate impressions-an in vitro study. TPDI. 2010; 1: 34–7

Aalaei S, Khanloo RG, Gholam F. Effect of Storage Period on Dimensional Stability of Alginplus and Hydrogum 5. TUMS. 2017; 31-9

Samra RK, Bhide SV. Comparative evaluation of dimensional stability of impression materials from developing countries and developed countries after disinfection with different immersion disinfectant systems and ultraviolet chamber. Saudi Dent J. 2018. 30: 124-41

Brinker JC, Scherer GW. Sol-Gel science. New York: Academic Press; 1990. p. 2-16, 304-19, 373-84, 408-20.

Erbe C, Ruf S, Wöstmann B, Balkenhol M. Dimensional stability of contemporary irreversible hydrocolloids: humidor versus wet tissue storage. J Prosthet Dent. 2012; 108(2): 114–22.

Darvell BW. Material science for dentistry. Chapter 7. Flexible Impression Material. 2018; 192-230

Nassar U, Aziz T and Flores-Mir C. Dimensional stability of irreversible hydrocolloid impression materials as a function of pouring time: A systematic review. J Prosthet Dent. 2011; 106: 126-33

Chen SY, Liang WM, Chen FN. Factors affecting the accuracy of elastometric impression materials. Journal of Dentistry. 2004 (32); 603–09

Todd JA, Oesterle LJ , Newman SM, Shellhart WS. Dimensional changes of extended-pour alginate impression materials. Am J Orthod Dentofacial Orthop 2013; 143: S55-63

Gumus HO, Dincel M, Buyuk SK, Kilinc HI, Bilgin MS, Zortuk M. The effect of pouring time on the dimensional stability of casts made from conventional and extended-pour irreversible hydrocolloids by 3D modelling. Journal of Dental Sciences. 2015; 10: 275-81



  • There are currently no refbacks.

Copyright (c)

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