Evaluation of Effect of Different Finishing and Polishing Procedures on the Surface Hardness of a Silorane Based Composite Resin

Year 2008, Volume: 35 Issue: 1 - Volume: 35 Issue: 1, 5 - 9, 01.02.2008

Onur Uğuz Osman Gökay Arzu Müjdeci

Abstract

New resin types have been developed for preventing polimerization shrinkage which is one of the major problems at composite resin restorations. Silorane based composite resin system is an example for these investigations. Aim of this in vitro study is to assess the effect of finishing and polishing procedures on surface hardness of a silorane based composite resin. 24 cylinder shaped 2mm height, 5mm diameter specimens of the silorane based composite Filtek Silorane; 3M ESPE, USA were prepared using by teflon molds against strips. Then the samples were placed in distilled water for 24 hours and divided into 3 groups n:8 . No finishing or polishing procedure was applied on samples at Group 1. Samples at the Group 2 were polished by using polishing discs while samples at the Group 3 were finished with tungsten carbide burs. Surface hardness measuremants were taken from top of each examples with Vickers microhardness tester under 100gr load and 15s dwell time. Results were evaluated statisti-cally using by Kruskal-Wallis test and Mann-Whitney U test.

Keywords

Silorane based composite resin, surface hardness, finishing and polishing systems

Siloran bazlı bir kompozit rezinin yüzey sertliği üzerine bitirme ve cila işlemlerinin etkisinin değerlendirilmesi

Abstract

Siloran bazlı kompozit rezinler, restorasyonlarda karşılaşılan ana problemlerden biri olanpolimerizasyon büzülmesini önlemek amacı ilegeliştirilmişlerdir. Bu in vitro çalışmanın amacıbitirme ve cila işlemlerinin siloran bazlı bir kompozit rezinin yüzey sertliği üzerine etkisinindeğerlendirilmesidir.Çalışmada kullanılan siloran bazlı kompozitrezin materyalinden Filtek Silorane; 3M ESPE,USA teflon kalıplar yardımı ile 2mm kalınlığında,5mm çapında bant karşısında 24 adet örnekhazırlandı, örnekler 24 saat distile suda bekletildikten sonra 3 gruba ayrıldı n=8 . Grup 1’deki örneklere herhangi bir bitirme ve cila işlemi uygulanmayıp, Grup 2’deki örneklere cila diskleri ile cila,Grup 3’deki örneklere ise tungsten karbid frezler ilebitirme işlemi uygulandı. Tüm gruplardaki örneklerin üst yüzeylerinden Vickers sertlik cihazıyardımı ile 100 gram yük ve 15 s yükleme süresialtında yüzey sertlik ölçümleri alındı. Elde edilensertlik değerleri istatistiksel olarak Kruskal-Wallistesti ve Mann-Whitney U testi ile değerlendirildi.Bu çalışmanın sonuçları bitirme ve cila işlemlerinin siloran bazlı kompozit rezinin yüzeysertliğini etkilediğini ortaya koymuştur p

Keywords

Siloran bazlı kompozit, yüzey sertliği, bitirme ve cila sistemleri

References

• Lutz F, Phillips RW. A classification and evaluation of composite resin systems. J Prosthet Dent 1983; 50: 480-8.
• Willems G, Lambrechts P, Braem M, Celis JP, Vanherle G. A classification of dental composites according to their morphological and mechanical characteristics. Dent Mater 1992; 8: 310-9.
• Weinmann W, Thalacker C, Guggenberger R. Siloranes in dental composites. Dent Mater 2005; 21: 68-74.
• Furuse AY, Gordon K, Rodrigues FP, Silikas N, Watts DC. Colour-stability and gloss-retention of silorane and dimethacrylate composites with accele- rated aging. J Dent 2008; 36:945-52.
• Eick JD, Smith RE, Pinzino CS, Kostoryz EL. Stability of silorane dental monomers in aqueous systems. J Dent 2006; 34: 405-10.
• Eick JD, Kotha SP, Chappelow CC, Kilway KV, Giese GJ, Glaros AG, Pinzino CS. Properties of silorane-based dental resins and composites conta- ining a stress-reducing monomer. Dent Mater 2007; 23: 1011-7.
• Lee H, Orlowski H. Handbook of dental composite restoratives. 3 rd ed., Los Angeles, Lee Pharmaceuticals, 1974; p. 40-52.
• Chung KH. The relationship between com- position and properties of posterior resin composites. J Dent Res 1990; 69: 852-4.
• Goldstein RE, Waknine S. Surface roughness evaluation of composite resin polishing techniques. Quintessence Int 1989; 20: 199-204.
• Ulusoy N, Bağış YH. Kompozit dolgularda farklı bitirme yöntemlerinin değerlendirilmesi: Bitirme yöntemlerinin hibrit kompozitlere etkisi. A Ü Diş Hek Fak Derg 1994; 21: 89-96.
• Yap AUJ. Effects of finishing/polishing time on surface characteristics of tooth-coloured restoratives. J Oral Rehabil 1998; 25: 456-61.
• Jefferies SR. The art and science of abra- sive finishing and polishing in restorative dentistry. Dent Clin North Am 1998; 42: 613-27.
• Yap AUJ, Yap SH, Teo CK, Nug JJ. Finishing/Polishing of composite and compomer restoratives: effectiveness of one-step systems. Oper Dent 2004; 29: 275-9.
• Korkmaz Y, Ozel E, Atar N, Aksoy G. The influence of one-step polishing systems on the sur- face roughness and microhardness of nanocompo- sites. Oper Dent 2008; 33: 44-50.
• Philips RW. Skinner’s science of dental materials.1 st ed., Philadelphia: WB Saunders Co; 1982; p. 14-21.
• Chinelatti MA, Chimello DT, Ramos RP, Palma-Dibb RG. Evaluation of the surface hardness of composite resins before and after polishing at dif- ferent times. J Applied Oral Sci 2006; 14: 188- 92.
• Gökay O, Özyurt P, Seçkin B. Farklı bitirme ve cila yöntemleri uygulanmış bir kompozit rezinin çeşitli likitler karşısında gösterdiği yüzey sertlik değerlerinin karşılaştırılması. T Klin Diş Hek Bil 1998; 4: 55-60.
• Anfe TE, Caneppele TM, Agra CM, Vieira GF. Microhardness assessment of different commer- cial brands of resin composites with different degrees of translucence. Braz Oral Res 2008; 22: 358-63.
• Asmussen E, Jorgensen KD. A microsco- pic investigation of the adaptation of some plastic fil- ling materials to dental cavity walls. Acta Odontol Scand 1972; 30: 3-21.
• Turkun LS, Turkun M. The effect of one- step polishing system on the surface roughness of three esthetic resin composite materials. Oper Dent 2004; 29: 203-11.
• Yap AUJ, Lye KW, Sau CW. Surface char- acteristics of tooth-colored restoratives polished uti- lizing different polishing systems. Oper Dent 1997; 22: 260-5.
• Stoddard JW, Johnson GH. An evaluation of polishing agents for composite resin. J Prosthet Dent 1991; 65: 491-5.
• Cenci MS, Venturini D, Pereira-Cenci T, Piva E, Demarco FF. The effect of polishing tech- niques and time on the surface characteristics and sealing ability of resin composite restorations after one-year storage. Oper Dent 2008; 33: 169-76.