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REVIEW ARTICLE
Year : 2018  |  Volume : 10  |  Issue : 4  |  Page : 161-167

Various recent reinforcement phase incorporations and modifications in glass ionomer powder compositions: A comprehensive review


1 Department of Biomaterials and Prosthodontics, Universiti Sains Malaysia (Health Campus) Kubang Kerian, Malaysia
2 Department of Conservative Dentistry School of Dental Sciences, Universiti Sains Malaysia (Health Campus) Kubang Kerian, Malaysia
3 Department of Dental Materials, Universiti Sains Malaysia (Health Campus) Kubang Kerian, Malaysia
4 Department of Human Genetics and Molecular Biology School of Dental Sciences (PPSG), Universiti Sains Malaysia (Health Campus) Kubang Kerian, Malaysia

Correspondence Address:
Dr. Wan Zaripah Wan Bakar
School of Dental Sciences, 16150, Kubang Kerian, Kelantan
Malaysia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jioh.jioh_160_18

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Glass ionomer cements (GIC) were first introduced to dentistry in the late 1960s and since have proven to be useful in various areas of dental science, particularly restorative dentistry. As an aqueous polyelectrolyte system, GICs are known for their relative ease of use, chemical bond to the tooth, fluoride release and recharge, low coefficient of thermal expansion, and acceptable esthetic quality. However, clinical usage of GICs is still limited due to their relatively inferior mechanical properties and sensitivity to initial desiccation and moisture. Years of extensive research on enhancing the chemistry of the basic glasses have yielded improved formulations with enhanced mechanical properties and reduced moisture sensitivity. A comprehensive review of the available literature has revealed that not all modifications in glass powder have resulted in the desirable strengthening of GICs. There is a shift of focus toward studies on nanoscale particles and bioactive glass. Recent research has proven that incorporation of nanoceramics such as hydroxyapatite (HA), fluorapatite, silica, and zirconia (ZrO2) have resulted in improved mechanical properties of GICs due to their ability to release fluoride, high surface area, and better particle size distribution. More work should thus, be undertaken to optimize techniques for enhancing the physicomechanical properties of GICs by incorporation of nanophases of ZrO2, HA, and metallic nanofillers.


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