The effect of die spacer on retention and fitting of complete cast crowns
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Abstract
Purpose: The aim of this study was to determine the influence of multiple layers of die relief agent and different cement thickness on the retention of cast restorations using two different cements. Materials and Methods: 144 standard stainless steel dies were divided into two groups. Each of them includes 72 dies. These groups were divided into 12 equal subgroups as well. In both groups, die spacer was applied to dies in 0, 3, 4, 5, 6 and 7 layers (each layer=5μ). In the first group,crowns were cemented with Zinc Phosphate and in the second group, Polycarboxylate was used forcementing. After that, the strength required for separating the castings from the dies was measured. Results: The difference among 12 subgroups analyzed by one-way ANOVA regarding Polycarboxylate cement did not reach statistical significance. (P=0.95). A similar result was obtained with zinc phosphate cement (P=0.616). Likewise, the two-way ANOVA was carried out between the zinc phosphate and polycarboxylate groups. There was a significant difference between the average of two groups (P<0.001). Conclusion: Range of cement layer thickness that used in this study didn’t statistically significantly affect the force required to remove cemented cast copings. Although the castings cemented with Zinc Phosphate needed higher force to be dislodged from dies.
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5.Hmaidoucha R, Neumannb P, Muellerc W. Influence of Preparation Form, Luting Space Setting and Cement Type on the Marginal and Internal Fit of CAD/CAM Crown Copings Int J Comput Dent. 2011;14:219-26.
6.Emtiaz S, Goldstein G. Effect of die spacers on precementation space of complete-coverage restorations. Int J Prosthodont. 1997;10(2).
7.Hassan LA, Goo CL. Effect of cement space on marginal discrepancy and retention of CAD/CAM crown. Dent Mater J. 2021:2020-408.
8.Gultekin P, Gultekin BA, Aydin M, Yalcin S. Cement selection for implant‐supported crowns fabricated with different luting space settings. J Prosthodont. 2013;22(2):112-9.
9.Taha FA, Ibraheem AF. The effect of die spacer thickness on retentive strength of all zirconium crowns (an in vitro study). Int J Med Sci Public Health. 2019;8(1):22-7.
10.Rosenstiel SF LM, Fujimoto J. Contemporary Fixed prosthodontics. 5th edition ed: St. Louis, Missouri : Elsevier; 2016.
11.Sita Ramaraju D, Alla RK, Alluri VR, Raju M. A review of conventional and contemporary luting agents used in dentistry. Am J Mater Sci Eng. 2014;2(3):28-35.
12.Mehl C, Harder S, Steiner M, Vollrath O, Kern M. Influence of cement film thickness on the retention of implant‐retained crowns. J Prosthodont. 2013;22(8):618-25.
2.Pilo R, Cardash H, Baharav H, Helft M. Incomplete seating of cemented crowns: a literature review. J Prosthet Dent. 1988;59(4):429-33.
3.Mule SA, Dange SP, Khalikar AN, Vaidya SP. Effect of varying layers of two die spacers on Precementation space of full coverage restorations. J Indian Prosthodont Soc. 2014;14(1):67-75.
4.Chiramana S, Siddineni KC, Jyothula RRD, Gade PK, Bhupathi D, Kondaka S, et al. Evaluation of the Luting Cement Space for Provisional Restoration by using Various Coats of Die Spacer Materials-An Invitro Study. J Clin Diagnostic Res. 2014;8(9):ZC22.
5.Hmaidoucha R, Neumannb P, Muellerc W. Influence of Preparation Form, Luting Space Setting and Cement Type on the Marginal and Internal Fit of CAD/CAM Crown Copings Int J Comput Dent. 2011;14:219-26.
6.Emtiaz S, Goldstein G. Effect of die spacers on precementation space of complete-coverage restorations. Int J Prosthodont. 1997;10(2).
7.Hassan LA, Goo CL. Effect of cement space on marginal discrepancy and retention of CAD/CAM crown. Dent Mater J. 2021:2020-408.
8.Gultekin P, Gultekin BA, Aydin M, Yalcin S. Cement selection for implant‐supported crowns fabricated with different luting space settings. J Prosthodont. 2013;22(2):112-9.
9.Taha FA, Ibraheem AF. The effect of die spacer thickness on retentive strength of all zirconium crowns (an in vitro study). Int J Med Sci Public Health. 2019;8(1):22-7.
10.Rosenstiel SF LM, Fujimoto J. Contemporary Fixed prosthodontics. 5th edition ed: St. Louis, Missouri : Elsevier; 2016.
11.Sita Ramaraju D, Alla RK, Alluri VR, Raju M. A review of conventional and contemporary luting agents used in dentistry. Am J Mater Sci Eng. 2014;2(3):28-35.
12.Mehl C, Harder S, Steiner M, Vollrath O, Kern M. Influence of cement film thickness on the retention of implant‐retained crowns. J Prosthodont. 2013;22(8):618-25.
| Files | ||
| Issue | Vol 9, No 1 (Winter 2022) | |
| Section | Original Article(s) | |
| DOI | https://doi.org/10.18502/jcr.v9i1.11082 | |
| Keywords | ||
| Cement space Die spacer Retention Polycarboxylate cement Zinc phosphate cement | ||
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
How to Cite
1.
Hajimahmoudi MR, Niakan S, Mohebbi H, Sarooghi R. The effect of die spacer on retention and fitting of complete cast crowns. J Craniomaxillofac Res. 2022;9(1):40-44.
