Farklı Yapı ve Kalınlıktaki İndirekt Restoratif Materyallerden İletilen Işık Gücünün Değerlendirilmesi

Abstract

Amaç Bu in vitro çalışmada, farklı yapı ve kalınlıktaki indirekt restoratif materyallerden iletilen ışık gücü, yerli üretim bir LED ışık kaynağı kullanılarak değerlendirildi. Materyal türü ve kalınlığının ışık iletimi üzerindeki etkisinin karşılaştırmalı olarak incelemesi amaçlandı. Gereç ve Yöntem Lityum disilikat cam seramik (IPS e.max CAD, Ivoclar Vivadent, Lihtenştayn), hibrit seramik (Grandio Blocs, Voco, Almanya) ve 3 boyutlu (3B) baskı ile üretin rezin materyal (VarseoSmile TriniQ, Bego, Almanya) olmak üzere farklı içerikteki indirekt restoratif materyallerin her birinden 8x2mm ve 8x1,5mm boyutlarında disk şeklinde örnekler tasarlandı (CAD Software, Solidworks, ABD). Cam seramik ve hibrit seramik örnekler MCX5 Kazıma Ünitesi (Dentsply Sirona, ABD) ile, baskıyla üretilen rezin örnekler ise Max2 (Asiga, Avustralya) 3B yazıcı ile üretildi (n=10). Vega ışık kaynağının (Öncü Dental, Türkiye) gücü materyal olmadan direkt olarak ve hazırlanan örneklerden geçirilerek spektrometre (OHSP-350B, Hopoo Light&Color Technology, Çin) ile ölçülüp kaydedildi. Işık kaynağının örneklerden iletilen güçleri oransal olarak hesaplandı. Elde edilen veriler Kruskal Wallis ve Mann-Whitney U testleri kullanılarak istatistiksel olarak değerlendirildi (p<0,05). Bulgular Materyal kalınlığı ve türü iletilen ışık gücünü anlamlı şekilde etkiledi (p<0,01). Kalınlık arttıkça iletilen ışık gücü azaldı; Grandio Blocs en yüksek, VarseoSmile TriniQ en düşük değerleri gösterdi. Materyal kalınlığı ve türü iletilen ışık geçme yüzdesini de anlamlı şekilde etkiledi (p<0,01). Işık geçme yüzdesi tüm kalınlıklarda en yüksek Grandio Blocs’ta ölçüldü. Sonuç İndirekt restoratif materyallerden iletilen ışık gücü, polimerizasyon sürecinde önemli bir rol oynamaktadır. Materyal türü ve kalınlığındaki değişimler, ışık geçiş miktarını ve dolayısıyla polimerizasyon verimini etkileyebilir. Klinik uygulamalarda indirekt restoratif materyallerin başarısı için, seçilen materyalin ışık geçirgenliği ve uygun kalınlıkta kullanımı büyük önem taşımaktadır.

Keywords

• Dental materyaller
• Dental polimerize edici ışıklar
• Kalıcı dental restorasyonlar

Evaluation of Irradiance Through Indirect Restorative Materials of Different Structures and Thicknesses

Abstract

Objectives: The irradiance transmitted through indirect restorative materials of different structures and thicknesses was evaluated using a domestically manufactured LED light curing unit. Material and thickness effects on light transmission was investigated. Materials and Methods: Disc-shaped specimens (8x2mm/8x1.5mm) were manufactured from lithium disilicate glass ceramic (IPS e.max CAD, Ivoclar Vivadent, Liechtenstein), hybrid ceramic (Grandio Blocs, Voco, Germany) and 3D printable resin (VarseoSmile TriniQ, Bego, Germany). Glass ceramic and hybrid ceramic specimens were milled using a MCX5 Milling Unit (Dentsply Sirona, USA) and 3D printable resin material was produced using Max2 (Asiga, Australia) 3D printer (n=10). The irradiance of Vega light curing unit (Öncü Dental, Türkiye) was measured directly and through the prepared specimens using a spectrometer (OHSP-350B, Hopoo Light&Colour Technology, PRC). Values obtained through the specimens were calculated as a ratio of the directly measured irradiance. The data were statistically analyzed using Kruskal Wallis and Mann-Whitney U tests (p<0.05). Results: Material and thickness significantly affected the transmitted irradiance (p<0.001). Increasing thickness reduced the transmitted irradiance, Grandio Blocs presented the highest values and VarseoSmile TriniQ the lowest. Material and thickness also significantly affected the light transmission ratio (p<0.001). At all thicknesses, the highest light transmission ratio was recorded for Grandio Blocs. Conclusion: The light transmitted through restorative material plays a crucial role in polymerization process. Variations in material and thickness may influence the transmitted irradiance and the polymerization efficiency. The success of indirect restorations depends greatly on selecting materials with adequate light transmission and using them in appropriate thicknesses.

Keywords

• Dental curing lights
• Dental materials
• Permanent dental restorations

References

1. M, Živić M, Milosavljević M. A potential application of materials based on a polymer and CAD/CAM composite resins in prosthetic dentistry. J Prosthodont Res. 2021;65(2):137-47.
2. Spitznagel F, Boldt J, Gierthmuehlen P. CAD/ CAM ceramic restorative materials for natural teeth. J Dent Res. 2018;97(10):1082-91.
3. Aktug Karademir S, Atasoy S, Akarsu S, Karaaslan E. Effects of post-curing conditions on degree of conversion, microhardness, and stainability of 3D printed permanent resins. BMC Oral Health. 2025;25(1):304.
4. Pereira ALC, de Melo Dias AC, de Souza Santos K, et al. Influence of salivary pH on the surface, mechanical, physical, and cytotoxic properties of resins for 3D-printed and heat-polymerized denture base. J Dent. 2025;156:105721.
5. Oh R, Lim J-H, Lee C-G, Lee K-W, Kim S-Y, Kim J-E. Effects of washing solution temperature on the biocompatibility and mechanical properties of 3D-printed dental resin material. J Mech Behav Biomed Mater. 2023;143:105906.
6. Al-Dulaijan YA, Alsulaimi L, Alotaibi R, et al. Comparative evaluation of surface roughness and hardness of 3D printed resins. Materials (Basel). 2022;15(19):6822.
7. de Castro EF, Nima G, Rueggeberg FA, Giannini M. Effect of build orientation on accuracy, flexural modulus, flexural strength, and microhardness of 3D-printed resins for provisional restorations. J Mech Behav Biomed Mater. 2022;136:105479.
8. Soto-Montero J, Romano BdC, Noronha MdS, André CB, Giannini M. Microtensile bond strength of resin cements to 3D-printed and milled temporary restorative resins. Odovtos Int J Dent Sci. 2023;25(3):82-98.

9. Öztürk E, Bolay Ş, Hickel R, Ilie N. Effects of ceramic shade and thickness on the micromechanical properties of a light-cured resin cement in different shades. Acta Odontol Scand. 2015;73(7):503-7.
10. Hadis M, Leprince J, Shortall A, Devaux J, Leloup G, Palin W. High irradiance curing and anomalies of exposure reciprocity law in resinbased materials. J Dent. 2011;39(8):549-57.
11. Selig D, Haenel T, Hausnerová B, et al. Examining exposure reciprocity in a resin-based composite using high irradiance levels and realtime degree of conversion values. Dent Mater. 2015;31(5):583-93.
12. Brodbelt R, O’Brien W, Fan P. Translucency of dental porcelains. J Dent Res. 1980;59(1):70-5.
13. Pacheco RR, Carvalho AO, André CB, et al. Effect of indirect restorative material and thickness on light transmission at different wavelengths. J Prosthodont Res. 2019;63(2):232-8.
14. Caldas D, Almeida J, Correr-Sobrinho L, Sinhoreti M, Consani S. Influence of curing tip distance on resin composite Knoop hardness number using three different light-curing units. Oper Dent. 2003;28(3):315-20.
15. Staudt CB, Krejci I, Mavropoulos A. Bracket bond strength dependence on light power density. J Dent. 2006;34(7):498-502.
16. Jafari Z, Alaghehmand H, Samani Y, Mahdian M, Khafri S. Light transmittance of CAD/CAM ceramics with different shades and thicknesses and microhardness of the underlying lightcured resin cement. Restor Dent Endod. 2018;43(3):e31.
17. Hassanpour M, Narongdej P, Alterman N, Moghtadernejad S, Barjasteh E. Effects of post-processing parameters on 3D-printed dental appliances: A review. Polymers (Basel). 2024;16(19):2795.
18. De Castro EF, Fronza BM, Soto-Montero J, Giannini M, dos-Santos-Dias CT, Price RB. Effect of thickness of CAD/CAM materials on light transmission and resin cement polymerization using a blue light-emitting diode light-curing unit. J Esthet Restor Dent. 2023;35(2):368-80.
19. Lise DP, Van Ende A, De Munck J, et al. Light irradiance through novel CAD-CAM block materials and degree of conversion of composite cements. Dent Mater. 2018;34(2):296-305.
20. Doğu Kaya B, Öztürk S, Şenol AA, Kahramanoğlu E, Yılmaz Atalı P, Tarçın B. Effect of CADCAM block thickness and translucency on the polymerization of luting materials. BMC Oral Health. 2024;24(1):1384.
21. Watts DC, Algamaiah H. What happens when I irradiate a BFC? In: Bulk Fill Resin Composites in Dentistry: A Clinical Guide. Cham: Springer; 2023. p. 39-49.
22. Flury S, Lussi A, Hickel R, Ilie N. Light curing through glass ceramics with a second- and third-generation LED curing unit: effect of curing mode on the degree of conversion of dual-curing resin cements. Clin Oral Investig. 2013;17(9):2127-37.
23. Li Q, Lin H-L, Zheng M, Ozcan M, Yu H. Minimum radiant exposure and irradiance for triggering adequate polymerization of a photopolymerized resin cement. Materials (Basel). 2021;14(9):2341.
24. Watanabe H, Kazama R, Asai T, et al. Efficiency of dual-cured resin cement polymerization induced by high-intensity LED curing units through ceramic material. Oper Dent. 2015;40(2):153- 62.
25. Morimoto S, Zanini RAM, Meira JBC, Agra CM, Calheiros FC, Nagase DY. Influence of physical assessment of different light-curing units on irradiance and composite microhardness top/ bottom ratio. Odontology. 2016;104(3):298-304.