Materyal Kalınlığının Rezin Matriks Seramik Blokların Renk Değişimi Üzerine Etkisi

Amaç: Estetik olarak başarılı bir restorasyonun doğal diş morfolojisine benzer olmasının yanında, doğal diş dokusuna benzer renk karakterine sahip olması beklenir. Bu çalışmanın amacı farklı yapılara sahip rezin matriks seramik materyallerinin renk parametreleri ve renk değişimi üzerinde materyal kalınlığının etkisini değerlendirmektir.Gereç ve Yöntemler: Bu çalışmada 3 farklı yapıya sahip üç farklı kalınlıkta ve 8 mm ± 0,2 mm çapında toplam 90 adet A2 renginde dairesel rezin matriks seramik örnekler kullanıldı. Örnekler farklı yapı ve kalınlıklarına göre her grupta 10 ar adet örnek olacak şekilde 9 alt gruba ayrıldı. Örneklerin renk parametreleri (L*,a* ve b*) spektrofotometre cihazı kullanılarak tespit edildi ve cihaz restorasyon moduna getirilerek A2 rengine göre örneklerin renk değişimleri değerleri tespit edildi. Ayrıca örneklerin hue ve chroma değerleri de elde edilen a* ve b* değerleri kullanılarak hesaplandı. Elde edilen veriler iki yönlü varyans analizi (Two-way ANOVA) ve Tukey çoklu karşılaştırma testi ile p˂0,05 anlamlılık düzeyinde değerlendirildi.Bulgular: İstatistiksel analiz sonuçlarına göre L* değeri için materyal faktörünün etkili olmadığı, kalınlık faktörü ve kalınlıkXmateryal faktör etkileşiminin anlamlı olduğu görüldü (p˂0,05). a*, b*, hue, chroma ve ΔE değerleri için materyal faktörü, kalınlık faktörü ve kalınlıkXmateryal faktör etkileşiminin anlamlı olduğu görüldü (p˂0,05). Gruplar içerisinde sadece Grup E 1.5 mm kalınlığındaki örneklerden elde edilen ortalama ΔE değerinin klinik olarak kabul edilebilir sınırların altında olduğu tespit edildi. Sonuç: Materyal tipi ve kalınlığı rezin matriks seramiklerin renk karakteri üzerinde anlamlı bir etkiye sahiptir. Grupların renk parametre değişimleri için kritik kalınlık değeri 1mm dir.

Anahtar Kelimeler:

Rezin Matriks Seramikler, Renk Parametreleri, Renk Değişimi

Effect Of Material Thickness On The Color Change Of Resin Matrix Ceramic Blocks

Background: An aesthetically successful restoration is expected to be similar to the natural tooth morphology, as well as the color characteristics similar to natural tooth tissue. The aim of this study is to evaluate the effect of material thickness on color parameters and color change of resin ceramic materials with different structures.Methods: In this study, a total of 90 pieces of A2 circular resin matrix ceramic with three different thicknesses and 8 mm ± 0.2 mm diameter were used. The samples were divided into 9 subgroups according to their structure and thickness. The color parameters (L *, a * and b *) of the samples were determined using the spectrophotometer and the device was set to restoration mode and the color changes of the samples according to A2 color were determined. The hue and chroma values of the samples were also calculated using the obtained a * and b * values. The data were evaluated with two-way ANOVA and Tukey multiple comparison tests at a significance level of p (0.05.Results: According to the results of statistical analysis, it was observed that the material factor was not effective for L * value, thickness factor and thickness Xmaterial factor interactions were found to be significant (p˂0,05). Material factor, thickness factor, and thickness, x material factor interactions for a *, b *, hue, chroma and ΔE values were found to be significant (p˂0,05). It was determined that the mean ΔE value obtained from samples with Group E 1.5 mm thickness was below the clinically acceptable thresholds within the groups. Conclusion: The material type and thickness have a significant effect on the color characteristics of resin matrix ceramics. Critical thickness value for color parameter changes of groups is 1mm.

Keywords:

Resin Matrix Ceramics, Color Parameter, Color,

PDF

___

1- Fasbinder DJ, Neiva GF. Surface evaluation of polishing techniques for new resilient CAD/CAM restorative materials. J Esthet Restor Dent 2016;28:56-66.
2- Gracis S, Thompson VP, Ferencz JL, Silva NR, Bonfante EA. A new classification system for all-ceramic and ceramic-like restorative materials. Int J Prosthodont 2015;28:227-35
3- Albero A, Pascual A, Camps I, Grau-Benitez M. Comparative characterization of a novel cad-cam polymer-infiltratedceramic- network. J Clin Exp Dent 2015;7:e495–e500.
4- Awada A, Nathanson D. Mechanical properties of resinceramic CAD/CAM restorative materials. J Prosthet Dent 2015;114:587–593.
5- Buyukkaplan SU, Özarslan MM, Barutcigil Ç, Arslan M, Barutcigil K, Yoldan EE. Effects of staining liquids and finishing methods on translucency of a hybrid ceramic material having two different translucency levels. J Adv Prosthodont. 2017 Oct;9(5):387-393. doi: 10.4047/jap.2017.9.5.387.
6- Yu B, Ahn JS, Lee YK. Measurement of translucency of tooth enamel and dentin. Acta Odontol Scand 2009;67:57-64.
7- Pires-de-Souza Fde C, Casemiro LA, Garcia Lda F, Cruvinel DR. Color stability of dental ceramics submitted to artificial accelerated aging after repeated firings. J Prosthet Dent 2009;101:13-8.
8- Chu SJDA, Mieleszko AJ. Fundamentals of color: shade matching and communication in esthetic dentistry. Chicago: Quintessence Pub; 2004. p. 19-50
9- Pires LA, Novais PM, Araújo VD, Pegoraro LF. Effects of the type and thickness of ceramic, substrate, and cement on the optical color of a lithium disilicate ceramic. J Prosthet Dent. 2017 Jan;117(1):144-149. doi: 10.1016/j.prosdent.2016.04.003
10- Kurklu D, Azer SS, Yilmaz B, Johnston WM. Porcelain thickness and cement shade effects on the colour and translucency of porcelain veneering materials. J Dent 2013;41:1043-50.
11- Dikicier S, Ayyildiz S, Ozen J, Sipahi C. Effect of varying core thicknesses and artificial aging on the color difference of different all-ceramic materials. Acta Odontol Scand 2014;72:623-9.
12- Chaiyabutr Y, Kois JC, Lebeau D, Nunokawa G. Effect of abutment tooth color, cement color, and ceramic thickness on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown. J Prosthet Dent 2011;105:83-90.
13- Turgut S, Bagis B. Effect of resin cement and ceramic thickness on final color of laminate veneers: an in vitro study. J Prosthet Dent 2013;109:179-86.
14- Dikicier S, Ayyildiz S, Ozen J, Sipahi C. Effect of varying core thicknesses and artificial aging on the color difference of different all-ceramic materials. Acta Odontol Scand 2014;72:623-9.
15- Paravina RD, Ghinea R, Herrera LJ, Bona AD, Igiel C, Linninger M, et al. Color difference thresholds in dentistry. J Esthet Restor Dent. 2015 Mar-Apr;27 Suppl 1:S1-9. doi: 10.1111/jerd.12149.
16- Heydecke G, Zhang F, Razzoog ME. In vitro color stability ofdouble-layer veneers after accelerated aging. J Prosthet Dent2001;85:551–7.
17- Nogueira AD, Della Bona A. The effect of a coupling medium on color and translucency of CAD-CAM ceramics. J Dent. 2013 Aug;41 Suppl 3:e18-23. doi: 10.1016/j.jdent.2013.02.005. Epub 2013 Feb 22.
18- Ozturk O, Uludag B, Usumez A, Sahin V, Celik G. The effect of ceramic thickness and number of firings on the color of two all-ceramic systems. J Prosthet Dent. 2008 Aug;100(2):99-106. doi: 10.1016/S0022-3913(08)60156-0.
19- Son HJ, Kim WC, Jun SH, Kim YS, Ju SW, Ahn JS. Influence of dentin porcelain thickness on layered all-ceramic restoration color. J Dent. 2010;38 Suppl 2:e71-7. doi: 10.1016/j.jdent.2010.08.007. Epub 2010 Aug 21.
20- Joiner A, Luo W. Tooth colour and whiteness: A review. J Dent. 2017 Dec;67S:S3-S10. doi: 10.1016/j.jdent.2017.09.006. Epub 2017 Sep 18.
21- Kim SH, Lee YK, Lim BS, Rhee SH, Yang HC. Metameric effect between dental porcelain and porcelain repairing resin composite. Dent Mater 2007;23:374-9.
22- Egilmez F, Ergun G, Cekic-Nagas I, Vallittu PK, Lassila LVJ. Comparative color and surface parameters of current esthetic restorative CAD/CAM materials. J Adv Prosthodont. 2018 Feb;10(1):32-42. doi: 10.4047/jap.2018.10.1.32. Epub 2018 Feb 12.
23- Jarad FD, Moss BW, Youngson CC, Russell MD. The effect of enamel porcelain thickness on color and the ability of a shade guide to prescribe chroma. Dent Mater 2007;23:454-60.
24- Lee YK, Yu B, Lee SH, Cho MS, Lee CY, Lim HN. Shade compatibility of esthetic restorative materials--A review. Dent Mater. 2010 Dec;26(12):1119-26. doi: 10.1016/j.dental.2010.08.004.