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Year : 2018  |  Volume : 15  |  Issue : 3  |  Page : 201-207

Evaluation of retentive strength of four luting cements with stainless steel crowns in primary molars: An in vitro study

1 Dental Material Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
2 Department of Oral Hygiene, School of Hygiene, Torbat Heydarieh University of Medical Sciences, Torbat Heidariye, Iran

Correspondence Address:
Dr. Yegane Khazaei
Torbat Heidariye University of Medical Sciences, Razi St, Torbat Heidariye 43611
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1735-3327.231864

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Background: Stainless steel crown (SSC) is the most reliable restoration for primary teeth with extensive caries. Retention is of great importance for a successful restoration and is provided by various factors such as luting cements. The aim of this study was to evaluate the retentive strength of SSC cemented with four different luting cements. Materials and Methods: In this in vitro study, A total of 55 extracted primary first molars were selected. Following crown selection and cementation (one with no cement and four groups cemented with resin, glass ionomer, zinc phosphate, and polycarboxylate), all the specimens were incubated and thermocycled in 5°C–55°C. Retentive properties of SSCs were tested with a mechanical test machine. First dislodgement of each specimen and full crown removal were recorded. One-way ANOVA test followed by least significant difference test and Kruskal–Wallis test was used for retentive strength comparison at the level of significance of P < 0.05. Results: The results of the study showed that the specimens cemented with zinc phosphate exhibited higher retentive strength as compared to glass ionomer and polycarboxylate (P < 0.001 and P = 0.023, respectively). Conclusion: Zinc phosphate cement showed the most promising results; thus, it can be preferably used for cementation of the teeth with no grossly broken down crowns.

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