Resin-modified glass-ionomer cements

Resin-Modified Glass—Ionomer Cements. Resin-modified glass—ionomer cements are based on poly(alkeonic acid) systems that have... 

Antonucci, J. M., McKinney, J. E. Stansbury, J. W. (1988). Resin-modified glass-ionomer cement. US Patent Application 160,856. 

Wilson, A. D. (1990). Resin modified glass-ionomer cements. International Journal of Prosthodontics, 3, 425-46. 

R.M.H. Verbeeck, E.A.P. De Maeyer, L.A.M. Marks, R.G.J. De Moor, A.M.C.J. De Witte, L.M. Trimpeneers, Fluoride release process of (resin-modified) glass-ionomer cements versus (polyacid-modified) composite resins. Biomaterials 19 (1998) 509-519. 

J.A. Williams, R.W. Billington, G.J. Pearson, A long term study of fluoride release from metal containing conventional and resin modified glass ionomer cements, J. Oral Rehabil. 28 (2001) 41 7. 

B. Czarnecka, J.W. Nicholson, Ion release by resin-modified glass-ionomer cements into water and lactic acid solutions, J. Dent. 34 (2006) 539-543. 

Glas-ionomer cements are acid-based materials (using, e.g., polyacrylic acid), whose setting reaction involves neutralization of the acid groups by powdered solid bases (calcium fluoro-aluminosilicate glasses). Resin-modified glass ionomer cements are hybrid materials prepared by the incorporation of polymerizable components such as 2-hydroxyethyl methacrylate. ... 

V. Qvist, L. Laurheig, A. Poulsen, P.T. Teglers, Class II restorations in primary teeth 7-year study on three resin-modified glass ionomer cements and a compomer. Fur. J. Oral Sci. 112(2004) 188-196. 

R.J. Smales, K.K.W. Ng, Longevity of a resin-modified glass ionomer cements and a polyacid-modified resin composite restoring non-carious cervical lesions in general dental practice, Aust. Dent. J. 49 (2004) 196-200. 

Fig. 7.2 Commercial resin-modified glass-ionomer cement (Fuji IILC).

The relevant International Standard for resin-modified glass-ionomer cements uses flexural strength as the criterion of acceptable mechanical performance [26], and further specifies a minimum flexural strength of 20 MPa for these materials. No distinction is made between values required for liner/base materials and full restoratives, or indeed for materials intended for any other application, such as luting, but most brands of resin-modified glass-ionomer cement comfortable exceed this minimum value [27]. 

Like conventional glass-ionomers, resin-modified glass-ionomers may improve in strength as they age, which indicates that they, too, undergo slow maturation reactions [25,28]. In a study of compressive strength on early commercial resin-modified glass-ionomer cements, the values shown in Table 7.2 were obtained for specimens stored in air at ambient humidity [25]. Storage in an aqueous solution of sodium chloride or in water masked this effect, for reasons explained in Section 7.5.1. 

The bonding of resin-modified glass-ionomer cements is associated with the formation of a gel phase at the interface between the material and the tooth surface [82,88]. This phase seems to originate from the acid-base part of the formulation, as it consists substantially of calcium polyacrylate, a substance that forms as the cement sets. However, the gel phase is more substantial in these materials than in conventional glass-ionomers, so that its occurrence owes something to the overall composition of resin-modified glass-ionomers [89]. 

Resin-modified glass-ionomer cements have been used for both Class II and Class III restorations in primary teeth [97,98]. Their lower brittleness compared with conventional glass-ionomers make them appropriate for these applications, though composite resin again appears preferred for these types of cavity in permanent teeth [94], Various clinical studies have shown resin-modified glass-ionomers to perform well in these restorations [99,100], and in addition they have been shown to have useful caries inhibition properties as a result of their fluoride release [101]. 

Resin-modified glass-ionomer cements have been used in Class V cavities, again with much of this use being in primary dentition [94]. For this type of repair, there do not appear to be any advantages of resin-modified over conventional glass-ionomers cements. Both types of material have proved effective in this application [57,102]. 

Resin-modified glass-ionomer cements are aesthetic materials for repairing teeth. 

Clinical use of resin-modified glass-ionomer cements (a) Light-cured RMGlCs... 

X. Quan, X. Chen, Dental resin-modified glass-ionomer cement composition, Eur. Patent 2764859 A2, 2014. 

E. Andrzejewska, M. Andrzejewski, M. Soeha, S. Zych-Tomkowiak, Effect of polyacid aqueous solutions on photocuring of polymerizable components of resin-modified glass ionomer cements. Dent. Mater. 19 (2003) 501-509. 

J. Li, M. von Beetzen, F. Sundstrom, Strength and setting behaviour of resin-modified glass ionomer cements, Acta Odontol. Scand. 53 (1995) 311-317. 

R.E. Kerby, J. Knobloch, A. Thakur, Strength properties of visible-light-cured resin-modified glass-ionomer cements, Oper. Dent. 22 (1997) 79-83. 

A. Akashi, Y. Matsuya, M. Unemori, A. Akamine, The relationship between water absorption characteristics and the mechanical strength of resin-modified glass-ionomer cements in long-term water storage. Biomaterials 20 (1999) 1573-1578. 

M.F. Costa Cabral, R.L. de Menezes Martinho, M.V. Guedes-Neto, M.A.B. Rebelo, D.G. Pontes, F. Cohen-Cameiro, Do conventional glass ionomer cements release more fluoride than resin-modified glass ionomer cements Restor. Dent. Endod. 40 (2015) 209-215. 

T.P. Croll, Y. Bar-Zion, A. Segura, K.J. Donly, Clinical performance of resin-modified glass ionomer cement restorations in primary teeth a retrospective evaluation, J. Am. Dent. Assoc. 132 (2001) 1110-1116. 

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