Evaluation of surface roughness of different restorative materials containing glass ionomer

Year 2013, Volume: 30 Issue: 1, 13 - 7, 11.03.2013

Mehmet Bani , Nurhan Öztaş

Abstract

OBJECTIVE: The aim of this study was to determine the effect of various pH levels on surface roughness of different type glass ionomer-containing restorative materials.

MATERIALS AND METHOD: Five different types of restorative materials containing glass ionomer were selected for the study. The materials used in the study were inserted into rectangular prism metal molds with 3x3x2 mm dimensions and polymerized. The specimens were kept in citric acid solution with varying pH levels (pH 2-6) at 37 ^oC for a week. Then, surface roughnesses were determined by using a profilometer with a tip diameter of 5 µm.

RESULTS: As the pH values decreased, surface roughnesses increased. Greatest alterations were reported for conventional glass ionomer cement and nano ionomer groups. In the giomer group, relatively low surface roughness was observed.

CONCLUSION: Change in the surface roughness as a result of exposure to low pH is associated with the type of the glass ionomer restorative material. Restorative materials that contained greater resin portion were less affected by low pH levels.

Keywords

Giomer, Glass Ionomer, Nano Ionomer, Surface Roughness

Cam iyonomer içerikli farklı restoratif materyallerin yüzey pürüzlülüklerinin değerlendirilmesi

Abstract

AMAÇ: Bu çalışmanın amacı değişik pH seviyelerinin farklı yapıda cam iyonomer içeren restoratif materyallerin yüzey pürüzlülüklerine etkisini belirlemektir.

GEREÇ VE YÖNTEM: Araştırma için beş farklı tipte cam iyonomer içerikli restoratif materyal kullanıldı. Kullanılan materyaller diktörtgenler prizması biçimindeki 3x3x2 mm’lik metal kalıplara yerleştirilerek sertleşmeleri sağlandı. Örnekler gruplara göre değişen pH seviyesindeki (pH 2-6) sitrik asit solüsyonunda 37 ^oC’de 1 hafta bekletilmelerinin ardından yüzey pürüzlülükleri, uç çapı 5 µm olan bir profilometre cihazı kullanılarak ölçüldü.

BULGULAR: Materyallerin pH değeri düştükçe yüzey pürüzlülük değerlerinin arttığı ve en büyük değişimin ise geleneksel cam iyonomer ve nano iyonomer grubunda olduğu bulgulandı. Giomerin ise düşük yüzey pürüzlülüğü gösterdiği bulgulandı.

SONUÇ: Cam iyonomer içerikli restoratif materyallerde pH değişikliğinin yüzey pürüzlülüğüne etkisinin materyalin yapısına bağlı olduğu belirlenmiştir. Rezin içeriği fazla olan restoratif materyallerin düşük pH’den daha az etkilendiği görülmüştür.

Keywords

Cam İyonomer, Giomer, Nano İyonomer, Yüzey Pürüzlülüğü

References

• Abu-Bakr NH, Han L, Okamoto A, Iwaku M. Effect of alcoholic and low-pH soft drinks on fluoride release from compomer. J Esthet Dent 2000;12:97-104.
• Bagheri R, Burrow MF, Tyas MJ. Surface characteristics of aesthetic restorative materials - an SEM study. J Oral Rehabil 2007;34:68-76.
• Han L, Okamoto A, Fukushima M, Okiji T. Evaluation of flowable resin composite surfaces eroded by acidic and alcoholic drinks. Dent Mater J 2008;27:455-65.
• Kimyai S, Savadi-Oskoee S, Ajami AA, Sadr A, Asdagh S. Effect of three prophylaxis methods on surface roughness of giomer. Med Oral Patol Oral Cir Bucal 2011;16:e110-4.
• Minami H, Hori S, Kurashige H, Murahara S, Muraguchi K, Minesaki Y, et al. Effects of thermal cycling on surface texture of restorative composite materials. Dent Mater J 2007;26:316-22.
• Wongkhantee S, Patanapiradej V, Maneenut C, Tantbirojn D. Effect of acidic food and drinks on surface hardness of enamel, dentine, and tooth-coloured filling materials. J Dent 2006;34:214-20.
• Yap AU, Mok BY. Surface finish of a new hybrid aesthetic restorative material. Oper Dent 2002;27:161-6.
• de A Silva MF, Davies RM, Stewart B, DeVizio W, Tonholo J, da Silva Júnior J, et al. Effect of whitening gels on the surface roughness of restorative materials in situ. Dent Mater 2006;22:919-24.
• Dhull KS, Nandlal B. Effect of low-concentration daily topical fluoride application on fluoride release of giomer and compomer: An in vitro study. J Indian Soc Pedod Prev Dent 2011;29:39-45.
• Ikemura K, Tay FR, Endo T, Pashley DH. A review of chemical-approach and ultramorphological studies on the development of fluoridereleasing dental adhesives comprising new pre-reacted glass ionomer (PRG) fillers. Dent Mater J 2008;27:315-39.
• Mohamed-Tahir MA, Yap AU. Effects of pH on the surface texture of glass ionomer based/containing restorative materials. Oper Dent 2004;29:586-91.
• Okuyama K, Murata Y, Pereira PN, Miguez PA, Komatsu H, Sano H. Fluoride release and uptake by various dental materials after fluoride application. Am J Dent 2006;19: 123-7.
• Tay FR, Pashley EL, Huang C, Hashimoto M, Sano H, Smales RJ, et al. The glass-ionomer phase in resin-based restorative materials. J Dent Res 2001;80:1808-12.
• Abd El Halim S, Zaki D. Comparative evaluation of microleakage among three different glass ionomer types. Oper Dent 2011;36:36-42.
• Coutinho E, Cardoso MV, De Munck J, Neves AA, Van Landuyt KL, Poitevin A, et al. Bonding effectiveness and interfacial characterization of a nano-filled resin-modified glass-ionomer. Dent Mater 2009;25:1347-57.
• Croll TP, Berg JH. Resin-modified glass-ionomer restoration of primary molars with proximating class II caries lesions. Compend Contin Educ Dent 2007;28:372-6.
• Fahmy AE, Farrag NM. Microleakage and shear punch bond strength in class II primary molars cavities restored with low shrink silorane based versus methacrylate based composite using three different techniques. J Clin Pediatr Dent 2010;35:173-81.
• Killian CM, Croll TP. Nano-ionomer tooth repair in pediatric dentistry. Pediatr Dent 2010;32:530-5.
• Korkmaz Y, Gurgan S, Firat E, Nathanson D. Shear bond strength of three different nano-restorative materials to dentin. Oper Dent 2010;35:50-7.
• Maneenut C, Sakoolnamarka R, Tyas MJ. The repair potential of resin-modified glass-ionomer cements. Dent Mater 2010;26:659-65.
• Endo T, Finger WJ, Kanehira M, Utterodt A, Komatsu M. Surface texture and roughness of polished nanofill and nanohybrid resin composites. Dent Mater J 2010;29:213-23.
• Gregg T, Mace S, West NX, Addy M. A study in vitro of the abrasive effect of the tongue on enamel and dentine softened by acid erosion. Caries Res 2004;38:557-60.
• Grossman ES, Rosen M, Cleaton-Jones PE, Volchansky A. Scientific surface roughness values for resin based materials. SADJ 2004;59:274-9.
• Joniot S, Salomon JP, Dejou J, Grégoire G. Use of two surface analyzers to evaluate the surface roughness of four esthetic restorative materials after polishing. Oper Dent 2006;31:39-46.
• Mueller J, Yang F, Neumann K, Kielbassa AM. Surface tridimensional topography analysis of materials and finishing procedures after resinous infiltration of subsurface bovine enamel lesions. Quintessence Int 2011;42:135-47.
• Neme AL, Frazier KB, Roeder LB, Debner TL. Effect of prophylactic polishing protocols on the surface roughness of esthetic restorative materials. Oper Dent 2002;27:50-8.
• Rodriguez JM, Curtis RV, Bartlett DW. Surface roughness of impression materials and dental stones scanned by non-contacting laser profilometry. Dent Mater 2009;25:500-5.
• Shabanian M, Richards LC. In vitro wear rates of materials under different loads and varying pH. J Prosthet Dent 2002;87:650-6.
• Barbour ME, Parker DM, Allen GC, Jandt KD. Human enamel dissolution in citric acid as a function of pH in the range 2.30< or =pH< or =6.30--a nanoindentation study. Eur J Oral Sci 2003;111:258-62.
• Kitchens M, Owens BM. Effect of carbonated beverages, coffee, sports and high energy drinks, and bottled water on the in vitro erosion characteristics of dental enamel. J Clin Pediatr Dent 2007;31:153-9.
• Eisenburger M, Addy M, Rossbach A. Acidic solubility of luting cements. J Dent 2003;31:137-42.
• Eisenburger M, Addy M. Evaluation of pH and erosion time on demineralisation. Clin Oral Invest 2001;5:108-11.
• Hughes JA, West NX, Parker DM, van den Braak MH, Addy M. Effects of pH and concentration of citric, malic and lactic acids on enamel, in vitro. J Dent 2000;28:147-52.
• Mount G, Dunitz M. An atlas of glass ionomer cements. London: Martin Dunitz; 1990.
• Wilder AD Jr, Swift EJ Jr, May KN Jr, Thompson JY, McDougal RA. Effect of finishing technique on the microleakage and surface texture of resin-modified glass ionomer restorative materials. J Dent 2000;28:367-73.
• Wan AC, Yap AU, Hastings GW. Acid-base complex reactions in resin-modified and conventional glass ionomer cements. J Biomed Mater Res 1999;48:700-4.
• Koupis NS, Marks LA, Verbeeck RM, Martens LC. Review: finishing and polishing procedures of (resin-modified) glass ionomers and compomers in paediatric dentistry. Eur Arch Paediatr Dent 2007;8:22-8.
• Pedrini D, Candido MS, Rodrigues AL. Analysis of surface roughness of glass-ionomer cements and compomer. J Oral Rehabil 2003;30:714-9.
• Watanabe T, Miyazaki M, Moore BK. Influence of polishing instruments on the surface texture of resin composites. Quintessence Int 2006;37:61-7.
• Fukazawa M, Matsuya S, Yamane M. The mechanism for erosion of glass-ionomer cements in organic-acid buffer solutions. J Dent Res 1990;69:1175-9.