Purpose: To evaluate the fracture resistance and bond strength of cast posts and cores (CPCs) and customized glass fiber posts (CFPs) with self-adhesive luting.
Materials And Methods: A total of 56 recently extracted premolars were divided into four groups for the fracture resistance test (CPC and CFP, with and without ferrule) and four groups for the bond strength test (CPC and CFP, immediate and 6 months of storage).
Results: Differences for fracture resistance were found between CPCs and CFPs with ferrule. For bond strength, the interaction between post and root region was significant.
Conclusion: Self-adhesive luting increased fracture resistance of CPCs with ferrule. The ferrule decreased root fractures. Bond strength was similar for both retainers but not for the apical third. Water storage affected bond strength positively.
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http://dx.doi.org/10.11607/ijp.5956 | DOI Listing |
J Vis Exp
December 2024
School of Engineering and Materials Science, Queen Mary University of London.
Under current minimally invasive treatment regimes, minor tooth preparation and thinner biomimetic ceramic restoration are used to preserve the restored tooth's vitality, aesthetics, and function. New computer-aided design and computer-aided manufacturing (CAD/CAM) ceramic-like material are now available. To guarantee longevity, a dental clinician must know these newly launched product's mechanical strength compared to the relatively brittle glass-matrix ceramic.
View Article and Find Full Text PDFJ Esthet Restor Dent
January 2025
Magne Education, Beverly Hills, California, USA.
Objective: Chemicals used during canal disinfection and endodontic sealers have a deleterious effect on dentin bond strength. The aim of this study was to evaluate a novel clinical sequence to improve the resin-dentin microtensile bond strength (μTBS) to endodontically treated teeth.
Materials And Methods: Twenty human molars were distributed in four experimental groups (n = 5, N = 20): C-control group without exposure to any endodontic chemical substances (2.
Sci Rep
January 2025
Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary.
Tooth degradation develops easily over time from initial caries to deeper cavities. The quality and durability of restorations are crucial in a patients' life, and it is primarily determined by the mechanical properties of the restorations. Clinicians and engineers apply biomimetic science in dentistry to mimic the natural design of the teeth and emphasize careful material selection as well as bond strength between the tissue and artificial material.
View Article and Find Full Text PDFJ Prosthodont Res
January 2025
Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Purpose: This study investigated the effects of femtosecond laser (FL) irradiation on the surface roughness and shear bond strength of high-translucency zirconia (6 mol% yttria-partially stabilized zirconia [6Y-PSZ]) and lithium disilicate (LiSiO) glass ceramics.
Methods: Fully sintered square-shaped specimens of 6Y-PSZ (7 groups; 20 specimens/group) and LiSiO (8 groups; 20 specimens/group) were surface-treated via sandblasting (50-μm alumina sand or glass beads) or FL irradiation (20- or 40-μm dot or cross-line patterns) or using Monobond Etch & Prime (Ivoclar Vivadent AG; only for LiSiO specimens). The surface roughness (arithmetic average [Sa] and developed interfacial area ratio [Sdr]) and shear bond strength after 24 h and 10,000 thermal cycles were measured and statistically analyzed.
Int J Biol Macromol
January 2025
Analytical and Testing Center, Lingnan Normal University, Cunjin Road 29, Chikan District, Zhanjiang, Guangdong Province 524048, People's Republic of China.
Understanding the interactions between small molecules and calf thymus deoxyribonucleic acid (ctDNA) is critical for certain aspects of drug discovery. In this study, three 11H-indeno[1,2-b]quinoxalin-11-one thiosemicarbazones were synthesized and their interaction with ctDNA was examined through various spectroscopic techniques, including ultraviolet (UV) spectroscopy, fluorescence spectroscopy, and circular dichroism (CD) spectrum, and through physicochemical methods, including viscosity measurements. In addition, the effects of these thiosemicarbazone compounds 4a, 4b and 4c on several cancer cell lines were explored.
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