DENTAL MATERIALS

Mechanical performance of endocrown restorations in anterior teeth: A systematic review and network meta-analysis
Fehrenbach J, de Soares JLS, do Nascimento Foly JCS, Miotti LL and Münchow EA
To conduct a systematic review and network meta-analysis (NMA) to answer whether endocrown restorations have similar mechanical behavior than other traditional core-crown systems with or without intracanal posts for the rehabilitation of anterior endodontically treated teeth.
Evaluation of polyaryletherketone materials as post-core abutments for removable partial dentures: A finite element analysis
Yagci F, Eraslan R and Esim E
The purpose was to compare the biomechanical behavior of single-piece post-core restorations made from polyaryletherketone materials with fiber post-core restorations when serving as abutments for RPD using finite element analysis (FEA).
Bonding neat hydrophobic-rich resins to etched dentin: A proof of concept
Stape THS, Ismail OA, Capitanio M and Tezvergil-Mutluay A
To examine whether the effectiveness of current dentin-priming approaches requiring solvated hydrophilic resins may be replicated by modifying the infiltration dynamics of neat methacrylate-based monomers into dry-etched dentin using dimethyl sulfoxide (DMSO) pretreatments.
Microspheres of stem cells from human exfoliated deciduous teeth exhibit superior pulp regeneration capacity
Ding J, Sun Z, Ma L, Wang L, Liao Z, Liang L, Yang H and Mao R
Engineering spheroids to create three-dimensional (3D) cell cultures has gained increasing attention in recent years due to their potential advantages over traditional two-dimensional (2D) tissue culture methods. Stem cells derived from human exfoliated deciduous teeth (SHEDs) demonstrate significant potential for pulpal regeneration applications. Nevertheless, the feasibility of microsphere formation of SHEDs and its impact on pulpal regeneration remain unclear.
Ability of a novel primer to enhance the polymerization of a self-cured resin composite
Guarneri JAG, Maucoski C, Ghaffari S, MacNeil BD, Price RB and Arrais CAG
This study evaluated the degree of conversion (DC), polymerization kinetics, and temperature of a new self-cure bulk-fill resin-based composite (Stela Automix, SDI).
Classification and bibliometric analysis of hydrogels in periodontitis treatment: Trends, mechanisms, advantages, and future research directions
Das R, Suryawanshi N, Burnase N, Barapatre A, Dharshini RS, Kumar B and Saravana Kumar P
The review assess the potential of hydrogel-based drug delivery systems in treating periodontitis. Hydrogels are classified based on source, composition, configuration, crosslinking methods, ionic charge, and response to stimuli.
Direct colour printing on zirconia using 222 nm UV-C photons
Bai X, Xu M, Jin S, Pow EHN, Chen Y and Tsoi JKH
To proof the feasibility of direct colour printing on 3Y-TZP using 222 nm UV-C through investigating the degree and durability of the colour changes, and testifying whether surface, mechanical and biological properties are influenced by the treatment.
Models for shrinkage stress: C-factor and all that
Fok A
Chemical analysis and performance evaluation of ClearCorrect® aligners as received and after intraoral use: Implications for durability, aesthetics, and patient safety
Bouchema T, Saunier J, Mauriello J, Tfayli A, Savard B and Yagoubi N
Orthodontic treatment with transparent aligners is popular with patients. Any alteration of the plastic material, as subjected to the oral environment, could influence the treatment's durability, the aligner's aesthetic appearance, and the patient's safety.
Current approaches to produce durable biomaterials: Trends in polymeric materials for restorative dentistry applications
Pfeifer CS, Lucena FS, Logan MG, Nair D and Lewis SH
Dental caries continues to be a public health issue, especially more evident in underserved populations throughout the U.S. Unfortunately, especially with an aging population, hundreds of thousands of resin composite restorations are replaced each year due to recurring decay and fracture. According to several cohort studies, the average life span of this type of restoration is 10 years or less, depending on the caries risk level of the patient and the complexity of the restorative procedure. Any new material development must depart from the simple restoration of form paradigm, in which the filling is simply inert/biocompatible. This review will discuss novel antibiofilm structures, based on a targeted approach specifically against dysbiotic bacteria. Biofilm coalescence can be prevented by using glycosyl transferase - GTF inhibitors, in a non-bactericidal approach. On the tooth substrate side, MMP-inhibiting molecules can improve the stability of the collagen in the hybrid layer. This review will also discuss the importance of testing the materials in a physiologically relevant environment, mimicking the conditions in the mouth in terms of mechanical loading, bacterial challenge, and the presence of saliva. Ultimately, the goal of materials development is to achieve durable restorations, capable of adapting to the oral environment and resisting challenges that go beyond mechanical demands. That way, we can prevent the unnecessary loss of additional tooth structure that comes with every re-treatment. CLINICAL SIGNIFICANCE: While proper restorative technique and patient education in terms of diet and oral hygiene are crucial factors in increasing the longevity of esthetic direct restorations, materials better able to resist and interact with the conditions of the oral environment are still needed. Reproducing the success of dental amalgams with esthetic materials continues to be the Holy Grail of materials development.
Polymer powerhouse: Methyl methacrylate - A breakthrough blend for superior adhesion to gingiva
Sanchez Armengol E, Sánchez Soler LA, Valverde Offermann N and Laffleur F
The goal of this study was to develop a new poly(methyl methacrylate) (PMMA)-based conjugate with enhanced mucoadhesive features for gingiva. Five MMA-based conjugates with varying amounts of hydroxyethyl maleimide (HEM) and poly(ethylene glycol) (PEG) were synthesized and characterized using infrared spectroscopy and proton nuclear magnetic resonance. Quantification of attached HEM and PEG was performed using assay kits and established protocols. Mucoadhesiveness was tested through rheological measurements, retention time, and tensile strength studies. Results showed successful unification of MMA with HEM and PEG, with varying degrees of modification and no toxic effects. Dynamic viscosity was enhanced up to 13-fold for MMA-100Mal, decreasing incrementally for MMA-75Mal, MMA-50Mal, MMA-25Mal, and MMA-0Mal. Retention time improved up to 120-fold for MMA-100Mal, decreasing to 37.5-fold for MMA-0Mal. Mucoadhesiveness followed the order: MMA-100Mal > MMA-75Mal > MMA-50Mal > MMA-25Mal > MMA-0Mal. In conclusion, the novel modification of MMA with increased mucoadhesive features to buccal gingiva suggests its potential as a long-term total denture base material, paving the way for more patient-friendly prostheses.
The preventive effect of silver diamine fluoride-modified salivary pellicle on dental erosion
Chawhuaveang DD, Lam WYH, Chu CH and Yu OY
To investigate the preventive effect of silver diamine fluoride (SDF) modified salivary pellicle (SP) against dental erosion.
Development and characterization of nitazoxanide-loaded poly(ε-caprolactone) membrane for GTR/GBR applications
Arora V, Lin RY, Tang YL, Tan KS, Rosa V, Sriram G and Dubey N
Guided tissue/guided bone regeneration (GTR/GBR) membranes are widely used for periodontal bone regeneration, but their success depends on a bacteria-free environment. Systemic antibiotic treatment often proves inadequate, moreover, the increasing prevalence of antibiotic resistance in oral infections exacerbates this challenge. This study aimed to fabricate antibacterial membranes using a new class of antibiotics for local drug delivery, to eradicate infections and promote tissue regeneration.
Surface and bulk viscoelastic stability of solvent-stored bulk-fill resin-based composite
Thanoon H, Silikas N and Watts DC
Investigate the effect of solvent-storage on surface hardness and bulk creep of fast photo-cured bulk-fill resin-based composite (RBC) compared to conventionally irradiated bulk-fill RBCs.
Graphene nanocoating on titanium maintains structural and antibiofilm properties post-sterilization
Morin JLP, Dubey N, Luong-Van EK, Yu B, Sabino CF, Silikas N, Agarwalla SV, Neto AC and Rosa V
To evaluate the impact of sterilization methods on the structural integrity and antimicrobial properties of graphene nanocoating on titanium (GN).
Effect of metal elements in coloring liquids used in the infiltration method on the physical properties of zirconia
Sugiki T, Suzuki S, Seto M and Ueda K
This study aimed to clarify the effect of metal elements in the coloring liquids used in the infiltration method on the physical properties of zirconia.
Assessment of 10-MDP and GPDM monomers on viability and inflammatory response in human dental pulp stem cells
Cavallaro-Mota FD, Esposo GN, Kury M, Fronza BM, Saraceni CHC, Andia DC and Lima AF
to assess the cytotoxicity of the following functional monomers used in dental adhesives: 10-Methacryloyloxydecyl dihydrogen phosphate (10-MDP) and glycerol phosphate dimethacrylate (GPDM), and their effect on cytokine release from human dental pulp stem cells (hDPSCs).
Role of 3Y-TZP grain boundaries in glazing and layering
Shahmiri R, Standard OC, Hart JN, Gharagozlu N, Bahmanrokh G, Yin Y, Mofarah SS, Adabifiroozjaei E, Webster R and Sorrell CC
Monolithic 3 mol% Yttria-stabilized tetragonal zirconia polycrystal or 3Y-TZP exhibits transformation toughening phenomena which is suitable for dental restorations with minimizing the risk of fracture and to decrease reduction of natural tooth. However, the staining/glazing or layering is required to achieve of a match with the optical properties of natural dentition. The hypothesis under examination is that the physical, chemical, and structural aspects of the 3Y-TZP grain boundaries after the staining/glazing or layering.
How many tooth colors are there?
Hein S, Morovič J, Morovič P, Saleh O, Lüchtenborg J and Westland S
This study aimed to estimate the number of distinct tooth colors using a large dataset of in-vivo CIELAB measurements. It further assessed the coverage error (CE) and coverage error percentage (CEP) of commonly used shade guides and determined the number of shades needed for an ideal guide, using the Euclidean distance (ΔEab) and thresholds for clinical perceptibility (PT) and acceptability (AT) as evaluation criteria.
Digital light printing of zirconia/resin composite material with biomimetic graded design for dental application
Li Q, Liu Y, Zhao D, Yang Y, Liu Q, Zhang Y, Wu J and Dong Z
Stress concentration and excessive wear on the opposite jaw teeth are the main problems that lead to the failure of all-ceramic crown restoration. The objectives of this study were to: (1) Synthesize the biomimetic gradient zirconia/resin composites. (2) Control the porosity and structure so that the mechanical properties of the biomimetic gradient zirconia/resin composites are close to enamel and dentin.
Impact of citric acid exposures on the erosion susceptibility and microhardness of anatomically different enamel surfaces
Almansour A, Bartlett D and Addison O
To determine the indentation-load dependency of the observed changes in surface microhardness of occlusal and buccal enamel polished surfaces before and after a dietary acid exposure.