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Dent. J. 2017, 5(1), 9; doi:10.3390/dj5010009

Modified Glass Ionomer Cement with “Remove on Demand” Properties: An In Vitro Study

1
Department of Prosthodontics and Biomaterials, Center for Implantology, Medical Faculty, RWTH Aachen University Hospital, Pauwelstrasse 30, 52074 Aachen, Germany
2
Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Paper Mill Road, Saharanpur- 247001, Uttar Pradesh, India
3
Functional and Interactive Polymers, DWI Leibniz Institute for Interactive Materials e.V., RWTH Aachen University, Forckenbeckstr. 50, 52074 Aachen, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Kurt H. Jaeger
Received: 10 November 2016 / Revised: 22 December 2016 / Accepted: 17 January 2017 / Published: 23 January 2017
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Abstract

Objectives: To investigate the influence of different temperatures on the compressive strength of glass ionomer cement (GIC) modified by the addition of silica-coated wax capsules; Material and Methods: Commercially-available GIC was modified by adding 10% silica-coated wax capsules. Test blocks were fabricated from pure cement (control) and modified cement (test), and stored in distilled water (37 °C/23 h). The compressive strength was determined using a universal testing machine under different temperatures (37 °C, 50 °C, and 60 °C). The maximum load to failure was recorded for each group. Fractured surfaces of selected test blocks were observed by scanning electron microscopy (SEM); Results: For the control group, the average compressive strength was 96.8 ± 11.8, 94.3 ± 5.7 and 72.5 ± 5.7 MPa for the temperatures 37 °C, 50 °C and 60 °C respectively. The test group reported compressive strength of 64.8 ± 5.4, 47.1 ± 5.4 and 33.4 ± 3.6 MPa at 37 °C, 50 °C and 60 °C, respectively. This represented a decrease of 28% in compressive strength with the increase in temperature from 37 °C to 50 °C and 45% from the 37 °C to the 60 °C group; Conclusion: GIC modified with 10% silica-coated wax capsules and temperature application show a distinct effect on the compressive strength of GIC. Considerable compressive strength reduction was detected if the temperature was above the melting temperature of the wax core. View Full-Text
Keywords: retrievability; glass ionomer cement; implant restorations; compressive strength retrievability; glass ionomer cement; implant restorations; compressive strength
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Bishti, S.; Tuna, T.; Agrawal, G.; Pich, A.; Wolfart, S. Modified Glass Ionomer Cement with “Remove on Demand” Properties: An In Vitro Study. Dent. J. 2017, 5, 9.

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