Abstract
The introduction of resin-based cements and an adhesive-bonding system in daily dental practice has given the opportunity to increase the retention of previously conventional cemented restorations and the optimal results in esthetic. This experimental study employed the 3D Digital Image Correlation Method (3D-DIC) for detecting shrinkage strain in four dual cured composite cements. The aim was to visualize measure, analyze, and compare strain fields in four resin-based cements using the 3D-DIC method. A total of 72 samples were divided into 4 groups considering variations in sample types, diameter, and thickness. Four types of composite cements: RelyX U200 (3 M ESPE, St. Paul, MN, USA), MaxCem Elite (Kerr, Orange, CA, USA), Multilink Automix (Ivoclar Vivadent, Schaan, Liechtenstein), and SeT PP (SDI, Australia) were used. Each type had diameters of 3 mm, 4 mm, and 5 mm, respectively, combined with two different values of thickness: 1 mm and 2 mm. Thickness had an important role on strain detected in all tested materials showing higher strain in samples with 2 mm thickness compared to 1 mm samples. Shrinkage strain values were the highest in Set PP samples indicated the possibility of undesirable de-bonding.
Highlights
In current dental practice resin-based cements (RBCs) have usually been used for all ceramic restorations xations, since they overcome poor mechanical, biological, and adhesion features of the previously used cement [1, 2]. e right choice of RBCs is signi cant for the longevity of dental restorative materials
Improved therapy success using resin composite cements is primarily based on their signi cant properties [6], such as thermal and chemical stability, decreased hydrolytic degradation, better solubility, wear resistance, higher elasticity, plasticity, hardness, and strength
E standard protocol steps prior to cementation, such as conditioning or priming pretreatments of tooth, involve using composite cements due to acidic and hydrophilic monomers and their ability to create stable chemical composition responsible for the strong bonding [7]. ese monomers are responsible for polymerization shrinkage stress and shrinkage strain, manifested during the RBCs’ hardening process [8, 9]
Summary
In current dental practice resin-based cements (RBCs) have usually been used for all ceramic restorations xations, since they overcome poor mechanical, biological, and adhesion features of the previously used cement [1, 2]. e right choice of RBCs is signi cant for the longevity of dental restorative materials. In current dental practice resin-based cements (RBCs) have usually been used for all ceramic restorations xations, since they overcome poor mechanical, biological, and adhesion features of the previously used cement [1, 2]. Composition of each ceramic system type is unique and requires appropriate type of resin-based cements and cementation protocol. It is important to establish adequate bond between cement and ceramic agents through adhesive or self-adhesive bonding [3,4,5]. Mechanical properties of the RBCs used for the cementation of all ceramics could determine long-term clinical prognosis due to adhesion problems. Improved therapy success using resin composite cements is primarily based on their signi cant properties [6], such as thermal and chemical stability, decreased hydrolytic degradation, better solubility, wear resistance, higher elasticity, plasticity, hardness, and strength. Dual cure mode, consisting of self-cure and light cure mode, has demonstrated the mechanical properties’
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