Glass‐ionomer cement restorative materials: a sticky subject?

Abstract

Glass-ionomer cement (GIC) materials have been in clinical use since their inception 40 years ago. They have undergone several permutations to yield different categories of these materials. Although all GICs share the same generic properties, subtle differences between commercial products may occur. They have a wide range of uses such as lining, bonding, sealing, luting or restoring a tooth. In general, GICs are useful for reasons of adhesion to tooth structure, fluoride release and being tooth-coloured although their sensitivity to moisture, inherent opacity, long-term wear and strength are not as adequate as desired. They are useful in situations where they are not disadvantaged by their comparatively lower physical properties, such as where there is adequate remaining tooth structure to support the material and where they are not subject to heavy occlusal loading. The last decade has seen the use of these materials being extended. However, they are likely to retain their specific niches of clinical application.

Quantification of color variation of restorative materials used on pediatric dentistry after pigmentation

“…These socalled conventional Ionomers, present in its composition an aqueous solution of polyacrylic acida at a 45% concentration and a powder consisting of Fluoramino Silicate Glass, Silicon, Aluminum, Phosphorus, Fluorine, Sodium and Calcium 5 . The conventional GIC are widely used in children and can be used as sealants for pits and fissures, cavity liner, cementing agents and as filling material 5 . They are also profusely used in Atraumatic Restorative Treatment, since they have the ability to remineralize the dental hard tissues 6 .…”

“…In response to the disadvantages related to convencional GIC, the Ionomer glass Modified Resins (RMGIC) 5 were introduced in the late 80´s offering improvements…”

“…As in the conventional GIC, the modified resins exhibit polyacrylic acid and a basic powdered glass in their constitution. However resinous hydrophilic monomers such as group 2-hydroxyethylmethacrylate (HEMA) and photoinitiator 5 are added in its constitution. This material possess a wide variety of uses and can be applied as a restorative material, cementing material, indirect pulp protector and also as a pit and fissure sealant 8 , making it easy to understand why the RMGIC have gained great popularity and currently being widely used in the practice of odontopediatrics dentistry 9 .…”

Avaliação dos níveis de cinza de cimentos ionômero de vidro em imagens digitais indiretas

“…A composição desses materiais sofreu significativas alterações, sendo lançados os cimentos ionômero de vidro modificados por metal e, posteriormente, os modificados por resina composta. Tais modificações em sua microestrutura permitiram melhor controle de algumas deficiências dos cimentos ionômeros de vidro convencionais, tais como elevada solubilidade, propriedades mecânicas limitadas, embebição e sinérese, tempo de trabalho curto e de presa longo, e estética limitada 1,3 .…”

“…Estes materiais apresentam vantagens marcantes. Dentre elas pode-se citar: adesão (tanto em esmalte quanto à dentina e cemento), resiliência (capacitando-os como excelentes substitutos de dentina, para o isolamento mecânico da polpa), biocompatibilidade e capacidade de liberação de fl úor 2,3 .…”