Effect of Resin Luting Film Thickness on Fracture Resistance of a Ceramic Cemented to Dentin

Abstract

Unluted specimens presented significantly lower fracture resistance than luted specimens. Higher cement film thickness resulted in increased fracture resistance for the 1-mm ceramic plates. Film thickness did not influence the fracture resistance of 2-mm porcelain plates.

Effect of overglazed and polished surface finishes on the compressive fracture strength of machinable ceramic materials

“…To isolate the final surface finishing method and type of ceramic material as the only variables in this study, a simple experimental design was adopted whereby rectangular ceramic plates adhesively luted to dentin were loaded with pressure only at one point at the center. Although this experimental design was also adopted in previous studies 17,19) , further studies are required to verify if different test methods would yield consistent results.…”

“…Consequently, flexural radial cracking originating from the bottom surface becomes the predominant fracture mode 35) . However, with a thicker ceramic plate, the bulk properties of the ceramic Table 3 Two-way analysis of variance of fracture load values material increase, thereby reducing the influence of the stiffness of the substrate (such as the luting cement or tooth structure) 19) . Consequently, cracks are predominantly initiated from the top outer surface of the ceramic plate in the form of a Hertzian fracture 35) .…”

“…In a bid to improve the fracture strength, studies on this issue have identified several factors that influence the fracture resistance of all-ceramic restorations, namely, type of ceramic material [2][3][4][5][6] , surface finish of all-ceramic restoration 2,[7][8][9][10][11][12][13][14][15][16] , cement thickness [17][18][19] , and type of luting agent 3,[20][21][22][23][24][25] . On the preferred surface treatment for ceramic restorations, glazing is generally advocated to improve their strength 2,12,13,26,27) and reduce their surface roughness 12,16,26,[28][29][30] .…”

Farkli Preparasyon Tekni̇kleri̇ Ve Farkli Si̇man Araliklarinda Hazirlanan Cad/Cam Lami̇nate Veneerleri̇n Kirilma Dayanimlarinin Değerlendi̇ri̇lmesi̇

“…Benzer Ģekilde Scherrer ve arkadaĢları 44 da rezin siman kullanarak cam seramiklerin kırılma direncini incelemiĢler ve 26µ ile 297µ siman aralıkları arasında istatistiksel olarak anlamlı bir fark bulmuĢlardır. Pirakki ve arkadaĢları 45 ise, 1mm kalınlığındaki seramiğin kırılma direncinin siman aralığı arttıkça arttığını bulmuĢlardır. 2 mm kalınlığında seramik kullandıklarında ise farklı siman aralığı değerlerinin kırılma direnci üzerinde etkisinin olmadığını ileri sürmüĢlerdir.…”

“…Yapılan birçok çalıĢmada simante edilmemiĢ restorasyonların simante edilen restorasyonlara göre daha düĢük kırılma direnci gösterdiği bildirilmiĢtir. [45][46][47] Bu nedenle artan siman aralığı ve polimerizasyon büzülmesi ile bağlantı zayıflayaca-ğından veya bazı mikro-bölgelerde bağlantı kopacağından kırılma direnci de azalıyor olabilir.…”