Modified Glass Ionomer Cement with -Remove on Demand- Properties: An In Vitro StudyReportar como inadecuado


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


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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

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





Autor: Shaza Bishti 1,* , Taskin Tuna 1, Garima Agrawal 2,3, Andrij Pich 3 and Stefan Wolfart 1

Fuente: http://mdpi.com/



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