Qingyi Yang, Wenqian Zheng, Yuping Zhao, Yaru Shi, Yi Wang, Hongchen Sun, Xiaowei Xu
OBJECTIVE: This review elucidates the mechanisms underpinning intrafibrillar mineralization, examines various amorphous calcium phosphate (ACP) stabilizers employed in dentin's intrafibrillar mineralization, and addresses the challenges encountered in clinical applications of ACP-based bioactive materials. METHODS: The literature search for this review was conducted using three electronic databases: PubMed, Web of Science, and Google Scholar, with specific keywords...
June 13, 2024: Dental Materials
Manuel Toledano-Osorio, Elvira de Luna-Bertos, Manuel Toledano, Francisco Javier Manzano-Moreno, Concepción Ruiz, Mariano Sanz, Raquel Osorio
OBJECTIVE: To evaluate whether nanoparticles (NPs) functionalized with Tideglusib (TDg, NP-12), and deposited on titanium surfaces, would counteract the effect of bacterial lipopolysaccharide (LPS) on osteoblasts. METHODS: Experimental groups were: (a) Titanium discs (TiD), (b) TiD covered with undoped NPs (Un-NPs) and (c) TiD covered with TDg-doped NPs (TDg-NPs). Human primary osteoblasts were cultured onto these discs, in the presence or absence of bacterial LPS...
June 12, 2024: Dental Materials
Zhongyuan Wu, Ke Sun, Wenshun Wang, Qi Xue, Bruna S H Tonin, David C Watts, Jing Fu, Hang Wang
OBJECTIVE: Polymerization shrinkage poses a significant challenge in dental resin composites. The objective of this study is to introduce spiroorthocarbonate monomer 3,9-dimethylene-1,3,5,7-tetraoxa-spiro[5,5]undecane (BMSOC) and epoxy resin monomer 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate (ECHM-ECHC) into bisphenol-S-bis(3-methacrylato-2-hydroxy propyl)ether (BisS-GMA) based resin composites to develop composites with reduced shrinkage properties. METHODS: BMSOC and BisS-GMA were synthesized and thoroughly mixed with ECHM-ECHC, followed by inorganic fillers and photoinitiators...
June 12, 2024: Dental Materials
Mariana Reis-Havlat, Ariene A Leme-Kraus, Yvette Alania, Bin Zhou, Yu Tang, James B McAlpine, Shao-Nong Chen, Guido F Pauli, Ana K Bedran-Russo
OBJECTIVE: Investigate the bioactivity and stability of Rhodiola rosea (RR) fractions as a natural source of prodelphinidin gallate (PDg) on dentin collagen via analysis of the viscoelastic and resin-dentin adhesive properties of the dentin matrix. METHODS: The biomimicry and stability of RR subfractions (F1, F2, F3 and F4) with collagen were determined by dynamic mechanical analysis (DMA). DMA used a strain sweep method to assess the dentin matrix viscoelastic properties [storage (E'), loss (E"), and complex (E*) moduli and tan δ] after treatment, 7-, 30- and 90-days of storage in simulated body fluids (SBF)...
June 12, 2024: Dental Materials
Igor Paulino Mendes Soares, Caroline Anselmi, Lídia de Oliveira Fernandes, Victoria Peruchi, Caroline Meronha de Lima, Maria Luiza Barucci Araujo Pires, Rafael Antonio de Oliveira Ribeiro, Carlos Alberto de Souza Costa, Josimeri Hebling
OBJECTIVES: To investigate the transdentinal effects of surface reaction-type pre-reacted glass-ionomer (S-PRG) fillers on odontoblast-like cells. METHODS: An eluate of S-PRG fillers was obtained by dissolving the particles in distilled water (1:1 m/v). Dentin discs with similar permeability were mounted into artificial pulp chambers and MDPC-23 cells were seeded on their pulpal surface. The occlusal surface was treated with (n = 10): ultrapure water (negative control - NC), hydrogen peroxide (positive control - PC), S-PRG eluate exposure for 1 min (S-PRG 1 min), or S-PRG filler eluate exposure for 30 min (S-PRG 30 min)...
June 12, 2024: Dental Materials
Qiulan Li, Ni Zhan, Takkun Ng, Michael V Swain, Boyang Wan, Yutao Jian, Xiaodong Wang, Ke Zhao
OBJECTIVES: To evaluate the hygroscopic expansion characterization of resin composite dies during thermal cycling, and their influence on the fracture resistance of dental ceramic materials as well as the effect of pre-immersion on these measurements. METHODS: Disc-shaped specimens (φ = 15.0 mm, h = 1.2 mm) and anatomical crown dies of four resin composites (epoxy, Z350, P60, G10) were fabricated. Disc-shaped samples were continuously soaked in distilled water and the volume expansion was measured at different time point by Archimedes method...
June 8, 2024: Dental Materials
Yasser M Aly, Zhenxue Zhang, Nesma Ali, Michael R Milward, Gowsihan Poologasundarampillai, Hanshan Dong, Sarah A Kuehne, Josette Camilleri
INTRODUCTION: Peri-implantitis is an inflammatory process around dental implants that is characterised by bone loss that may jeopardize the long-term survival of osseo integrated dental implants. The aim of this study was to create a surface coating on titanium abutments that possesses cellular adhesion and anti-microbial properties as a post-implant placement strategy for patients at risk of peri-implantitis. MATERIALS AND METHODSMETHODS: Titanium alloy Grade V stubs were coated with gold particles and then subjected to ceramic conversion treatment (CCT) at 620 °C for 3, 8 and 80 h...
June 8, 2024: Dental Materials
Savita Kumari, Anuj Verma, Rajat Kumar Mishra, Sarvesh Kumar Avinashi, Shweta, Shweta Singh, Priyatama Behera, Jitendra Rao, Rakesh Kumar Gautam, Bijay Laxmi Pradhan, Krishna Kishor Dey, Manasi Ghosh, Monalisa Mishra, Chandkiram Gautam
This work aims to demonstrate the effect of ZrO2 and MgO inclusion into the Poly(methyl methacrylate) (PMMA). To fabricate novel hybrid composites via heat cure method, various composites (PZM2, PZM4 and PZM6) were synthesized in the system [(95-x) PMMA + 5 ZrO2 + x MgO] (x = 2, 4, and 6) respectively. Density of the prepared composites were determined and varying between 1.035-1.152 g/cm3 . X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) followed by EDAX and mechanical testing were performed to evaluate the fabricated composite properties...
June 7, 2024: Dental Materials
Iris Lamparth, Jörg Angermann, Pascal Fässler, Thomas Schnur, Bernadette Graff, Coralie Ohl, Jacques Lalevée, Yohann Catel
OBJECTIVES: Hydroperoxides are key constituents of two-component dental materials. The objective of this study was to evaluate the influence of the hydroperoxide structure on the reactivity and on the mechanical properties of self-cure composites. METHODS: Hydroperoxides HP1-3 were synthesized by selective catalytic oxidation of the corresponding para-substituted cumene precursors and isolated in high purity. They were characterized by 1 H NMR and 13 C NMR spectroscopy...
June 7, 2024: Dental Materials
Tina Maleki, John Meinen, Andrea Coldea, Marcel Reymus, Daniel Edelhoff, Bogna Stawarczyk
OBJECTIVES: To investigate the flexural strength (FS), elastic modulus (E), Martens hardness (HM), water sorption (wsp ), water solubility (wsl ) and degree of conversion (DC) of 3D-printed, milled and injection molded splint materials. METHODS: Specimens (N = 1140) were fabricated from five 3D-printed (GR-22 flex, GR-10 guide, ProArt Print Splint clear, V-Print Splint, V-Print Splint comfort), five milled (BioniCut, EldyPlus, ProArt CAD Splint clear, Temp Premium Flexible, Thermeo) and two injection molded (PalaXPress clear, Pro Base Cold) materials...
June 7, 2024: Dental Materials
Yu-Cheng Chou, Shu-Fen Chuang, Jui-Che Lin, Chia-Ling Li, Bang-Yan Liu, Chung-Lin Lee
OBJECTIVES: To investigate a near-infrared-to-blue luminescence upconversion curing method for polymerizing resin cements under zirconia discs. METHODS: Lava zirconia discs of different thicknesses (0.5-2.0 mm) were manufactured. First, the transmittances of the NIR and two blue lights (BLs) (LED and halogen lights) through these discs were measured. Second, NaYF4 :Yb3+ /Tm3+ upconversion phosphor (UP) powder was milled into 0.5-μm particle sizes. A light-curable resin cement VariolinkII base was chosen as the control (UP0), and an experimental cement (UP5) was prepared by adding 5 % UPs...
June 7, 2024: Dental Materials
Petros Mourouzis, Dimitrios Dionysopoulos, Christos Gogos, Kosmas Tolidis
OBJECTIVES: This study conducted a comprehensive comparative analysis of three intraoral scanners (CEREC Primescan, TRIOS, CEREC Omnicam) and a lab scanner (inEosX5) assessing their precision in simulating subgingival tooth preparations. METHODS: Utilizing a dental simulation mannequin with a 3D-printed resin structure, 100 structures with depths ranging from 0.5 to 4.0 mm were created within a square mimicking a rectangular tank surface. Four scanner groups (A-D) and five subgroups were established...
June 6, 2024: Dental Materials
Talal Bin Irshad, Giulia Pascoletti, Francesco Bianconi, Elisabetta M Zanetti
OBJECTIVES: Nowadays, a wide variety of software for 3D reconstruction from CT scans is available; they differ for costs, capabilities, a priori knowledge, and, it is not trivial to identify the most suitable one for specific purposes. The article is aimed to provide some more information, having set up various metrics for the evaluation of different software's performance. METHODS: Metrics include software usability, segmentation quality, geometric accuracy, mesh properties and Dice Similarity Coefficient (DSC)...
June 5, 2024: Dental Materials
Hamza Elfarraj, Franco Lizzi, Kerstin Bitter, Paul Zaslansky
BACKGROUND: Root canal irrigation endodontic solutions have effects on the chemistry of dentin. Infrared spectroscopy is a non-destructive chemical characterization method where the strength of absorption often correlates with mineral or organic composition. OBJECTIVES: To survey effects of commonly used irrigation solutions on the composition of root dentin as detected by widely-available Fourier transform infrared spectroscopy (FTIR) methods. METHODS: Electronic databases were searched for articles published between 1983 to 2023...
June 1, 2024: Dental Materials
Ufuk Adali, Mona Sütel, Jamila Yassine, Zhen Mao, Wolf-Dieter Müller, Andreas Dominik Schwitalla
OBJECTIVE: Achieving a strong bond between Polyetheretherketone (PEEK) and veneering composites is challenging due to PEEKs low surface energy. This study examined the effects of sandblasting and bonding on the shear bond strength (SBS) between veneering composite and pigmented PEEK, considering artificial aging. METHODS: Of three pigmented PEEK compounds (DC4420R, DC4450R, DC4470R; Evonic Operations GmbH, Marl, Germany), 40 specimens each were milled and polished up to 2500 grit...
May 31, 2024: Dental Materials
Qingli Zhou, Yuzhu Li, Ting Xiao, Qi Zhong, Leping Wu, Zheng Zhou, Haiming Wong, Quan-Li Li
OBJECTIVE: Extrafibrillar demineralization is considered to be an ideal solution for addressing the durability of resin-dentin bonding interfaces. However, its theoretical basis is contradictory to ionization equilibrium of hydroxyapatite dissolution. In this study, various calcium chelators were selected as dentin conditioners to explore the essence of dentin demineralization with chelators and its effect on resin-dentin adhesion. METHODS: Polyethyleneimine grafted with EDTA and polyacrylic acid sodium (PAAN450k ) larger than 40 kDa, as well as PAAN (PAAN3k ) and EDTA smaller than 6 kDa, were prepared as dentin conditioners...
May 30, 2024: Dental Materials
Junjun Wang, Hongyan Chen, Hongmei Liu, Ruili Wang, Zongyi Qin, Meifang Zhu
OBJECTIVE: Although glass fibers are more common, quartz fibers (QFs) are also considered as the ideal reinforcing material in dentistry, due to their superior mechanical strength, high purity, and good photoconductive properties. However, the relatively inert surfaces limit their further applications. Therefore, the aim of this study is to modify the fiber surface properties to improve the interfacial interactions with polymeric resins. METHODS: In this study, we systematically introduced four different surface modification strategies onto short quartz fibers (SQFs) for the preparation of dental composites...
May 30, 2024: Dental Materials
Pmc Scaffa, M G Logan, M Y Icimoto, App Fugolin, F M Tsuzuki, S H Lewis, C S Pfeifer
Hydrolytically and enzymatically-stable multi-acrylamides have been proposed to increase the long-term durability of dental adhesive interfaces as alternatives to methacrylates. The aim of this study was to investigate the mechanical and biochemical properties of experimental adhesives containing multi-functional acrylamides concerning collagen reinforcement and metalloproteinases (MMP) activity. Multi-functional acrylamides, TMAAEA (Tris[(2-methylaminoacryl) ethylamine) and DEBAAP (N,N-Diethyl-1,3-bis(acrylamido) propane), along with the commercially available DMAM (N,N-dimethylacrylamide) (monofunctional acrylamide) and HEMA (2-Hydroxyethyl methacrylate) (monofunctional methacrylate - control) were tested for stability against enzymatic hydrolysis by cholesterol esterase/pseudocholinesterase (PC/PCE) solutions for up to 30 days...
May 30, 2024: Dental Materials
Thomas Niem, Antje Hübner, Bernd Wöstmann
OBJECTIVES: This study evaluated the impact of mutable water uptake on the durability of mechanical properties and the long-term reliability of artificial composites. METHODS: Three resin-based CAD/CAM restorative materials (CRMs) were investigated in three-point bending tests to calculate flexural strength (FS), modulus of elasticity (ME), modulus of resilience (MR), modulus of toughness (MT), and elastic recovery (ER). All specimens (n = 180) were stored under the same conditions and tested in four subsets (n = 15 per material) that were respectively withdrawn after repeated thermocycling (5000 cycles; 5-55 °C, H2 O) and repetitive drying (7 d; 37 °C, air)...
May 28, 2024: Dental Materials
Fucong Tian, Haili Mu, Yang Shi, Xiaobo Chen, Xiaoying Zou, Xuejun Gao, Xiaoyan Wang
OBJECTIVE: This study aimed to evaluate the long-term clinical performance of Giomer and a self-etch adhesive system compared with a nanofilled resin composite and etch-and-rinse adhesive system in Class I and Class II restorations. METHOD: The study was designed to be double-blinded with intra-individual control. 48 patients with 54 pairs of cavities (class I or class II) were recruited. Each pair of restorations was placed with either BEAUTIFIL II (BF) and FL-BOND II (FL) or Filtek Z350 (Z350) and Scotchbond Multi-Purpose (SMP)...
May 27, 2024: Dental Materials
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