Effect of Immediat Dentin Sealing on the Bonding State of Hybrid Ceramic CAD/CAM Restorative Material to Dentin

Year 2020, , 52 - 58, 31.12.2020

Ezgi Günsel Kesimli , Pınar Yılmaz Atalı , Cafer Türkmen

https://doi.org/10.35333/ERD.2020.266

Abstract

Objectives: Lately, computer-aided design (CAD) computer-aided manufacturing (CAM) systems with simplified procedures for indirect restoration have gained rapid improvements and commenced to be used in daily practice of dental clinicians. The aim of this pilot in vitro study was to analyze the bonding efficiency and observation of the failure mode of hybrid ceramic CAD/CAM block materials after termo-cycling, with different immediate dentin sealing (IDS) techniques. Materials and Methods: Eighteen freshly extracted human molars were selected, and mounted with acrylic resin, fixed the root up to 2.0 mm under the cementoenamel junction. Standardized, flat, nonretentive, midcoronal dentin surfaces were prepared. Using the stratified random sampling process, all teeth (N=18) were divided into groups of three by approximately similar sizes; afterwards, these teeth were randomly distributed into the test groups 1, 2 and 3 (n = 6). The specimens from groups 2 and 3 received IDS, whereas delayed dentin sealing was carried out for specimens group 1. For IDS materials, universal adhesive system G-Premio Bond (GC, Tokyo, Japan) and highly filled flowable resin composite G-aenial Universal Flo (GC, Tokyo, Japan) were used. All block material specimens were prepared using the cutting instrument (IsoMet 1000; Buehler, USA) and were fitted with a standardized 3x3-mm³ cubes cutted out of a CAD/CAM block of hybrid ceramic (Cerasmart, GC; Tokyo, Japan). Dual-polymerized resin cement G-CEM Link Force (GC, Tokyo, Japan) was utilized to lute restoration materials for all groups. To test the shear bond strength (SBS) each of the specimens was placed in a jig with 90^o to the vertical plane and tested a universal testing machine (Shimadzu AG-IS; Shimadzu Corp). One-way ANOVA was used to analyze the data of the SBS. Results were evaluated statistically significant for p<0.05. Results: No statistically significant difference revealed by the statistical analysis between Group 1,2 and 3 (p=0,372). This means there is no significant difference in the sealing methods (p>0,05). Bond failure rates showed similar results in all groups, where the most frequent failure pattern detected was ‘adhesive type’. Conclusions: Within the limitation of this in vitro pilot study, the following conclusion was drawn: Different IDS procedures tested does not statistically (p<0.05) effect the SBS of hybrid ceramic CAD/CAM material bonded to dentin with G-CEM Link Force.

Keywords

Immediate dentin sealing, hybrid ceramics, shear bond strength

Supporting Institution

Marmara University Scientific Research Projects Unit-BAPKO

Project Number

SAG-C-DRP-121218-0627

İmmediat Dentin Kapama Prosedürünün Hibrit Seramik CAD/CAM Restoratif Materyalinin Dentine olan Bağlantısına Etkisi

Abstract

Amaç: Günümüz diş hekimliği pratiğinde indirekt restorasyonların üretiminde CAD/CAM teknolojisinin kullanımı oldukça yaygınlaşmıştır. Bu pilot çalışmada dentin yüzeylerine uygulanan farklı IDS prosedürlerinin, hibrit seramik CAD/CAM restoratif materyalin dentine bağlanma dayanımına etkisini değerlendirmek amaçlanmıştır. Gereç ve Yöntemler: 18 tane yeni çekilmiş büyük azı dişi mine sement sınırının 2 mm altından akrilik rezin içerisine gömülerek sabitlendi. Tüm dişler (N=18) düz dentin yüzeyleri oluşturulacak şekilde prepare edildi. Birbirine yakın boyutlardaki dişler rastgele olmak üzere eşit sayıdaki 3 test grubuna (n=6) ayrıldı. Grup 2 ve Grup 3 örneklerine IDS tekniği uygulanırken Grup 1 örneklerine bu teknik uygulanmadı. IDS tekniğinde yüksek miktarda doldurucu içeren G-Premio Bond (GC, Tokyo, Japonya) universal adezivi ve G-aenial Universal Flo (GC, Tokyo, Japan) akışkan kompozit rezini kullanıldı. Tüm hibrit seramik CAD/CAM blok materyal (Cerasmart, GC; Tokyo, Japan) örnekleri kesme cihazında (IsoMet 1000; Buehler, Lake Bluff, IL, USA) 3x3 mm³ lük küpler halinde hazırlandı. Tüm örneklerin simantasyonunda dual polimerize rezin siman G-CEM Link Force (GC, Tokyo, Japonya) kullanıldı. Makaslama bağlantı kuvvetlerinin hesaplanmasında tüm örnekler için universal test cihazı (Shimadzu AG-IS; Shimadzu Corp) kullanıldı. Tüm veriler İstatistiksel olarak tek yönlü varyans analizi (ANOVA) kullanılarak değerlendirildi.. Sonuçlar p<0.05 için istatistiksel olarak anlamlı kabul edildi. Bulgular: Farklı immediat dentin kapama prosedürleri arasında dentine bağlantıda istatistiksel olarak anlamlı bir fark bulunamamıştır (p>0,05). Bütün örneklerin kopma yerleri optik mikroskopta değerlendirilmiş ve tüm gruplarda en sık ‘adeziv kopma’ gözlemlenmiştir. Sonuç: Bu in vitro pilot çalışmanın sınırları dahilinde, düz dentin yüzeylerine farklı immediat dentin kapama prosedürleri uygulanması, tümü G-CEM Link Force ile simante edilen hibrit seramik CAD/CAM materyalinin dentine olan makaslama bağlantı kuvvetini etkilememiştir.

Keywords

immediat dentin kapama, hibrit seramik, makaslama bağlanma dayanımı

Project Number

SAG-C-DRP-121218-0627

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