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Year : 2007  |  Volume : 7  |  Issue : 3  |  Page : 132-136

Evaluation of marginal microleakage of three zinc-oxide-based non-eugenol temporary luting agents: An in vitro study

Department of Prosthodontics, Nair Hospital Dental College, Mumbai, Maharashatra, India

Correspondence Address:
Subhash Bandgar
Department of Prosthodontics, Nair Hospital Dental College, Mumbai Central, Mumbai, Maharashatra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-4052.37657

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Aim: The marginal microleakage of recently used non-eugenol temporary cements is not well documented. Purpose: To evaluate the marginal microleakage of three zinc-oxide-based non-eugenol temporary luting agents using temporary crowns on prepared natural teeth. Materials and Methods: Freshly extracted 90 maxillary premolars of approximately similar crown height (7.8 mm-8.3 mm) were embedded in cold-cure resin blocks. Standard tooth reduction for ceramometal restorations with shoulder margin was planned using a customized handpiece-holding jig. Temporary crowns were prepared using the putty index technique following the tooth preparation. Specimens ware randomly divided into three groups of 30 each and temporary crowns were cemented using TempoSIL (Coltene/Whaledent AG), RelyXTempNE (3M ESPE AG), Freegenol (GC).The specimens were thermocycled for 250 times in the range of 5-60 degree with an interval of 10 s between two immersions. All the specimens were immersed in 5% basic fuschin and then embedded in cold cure resin and sectioned. The sectioned specimens were observed on the buccal and lingual side under optical microscope with an image analyzer for the evaluation of marginal microleakage. Results: Marginal microleakage was highly significant in all the three cements and occurred between the tooth surface and the cement layer and not between the cement layer and the restoration. Conclusion: Minimum marginal microleakage was obtained with the application of Templute. RelyXTempNE had the highest marginal microleakage and Freegenol showed intermediate values.

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