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Heliyon May 2024This study aims to assess and compare the micro-shear bond strength (SBS) of a novel resin-modified glass-ionomer luting cement functionalized with a methacrylate...
OBJECTIVES
This study aims to assess and compare the micro-shear bond strength (SBS) of a novel resin-modified glass-ionomer luting cement functionalized with a methacrylate co-monomer containing a phosphoric acid group, 30 wt% 2-(methacryloxy) ethyl phosphate (2-MEP), with different substrates (dentin, enamel, zirconia, and base metal alloy). This assessment is conducted in comparison with conventional resin-modified glass ionomer cement and self-adhesive resin cement.
MATERIALS AND METHODS
In this study, ninety-six specimens were prepared and categorized into four groups: enamel (A), dentin (B), zirconia (C), and base metal alloys (D). Enamel (E) and dentin (D) specimens were obtained from 30 human maxillary first premolars extracted during orthodontic treatment. For zirconia and metal alloys, 48 disks were manufactured using IPS e.max ZirCAD through dry milling and Co-Cr powder alloy by selective laser milling. Each group was further subdivided into three subgroups (n = 8) according to the luting cement used: (1) Fuji PLUS resin-modified glass ionomer luting cement (FP) as a control cement, (2) modified control cement (eRMGIC), and (3) RelyX U 200 (RU 200) self-adhesive resin cement. The two-way analysis of variance and Tukey's HSD were used to assess the data obtained from measuring the SBS of the samples.
RESULTS
The results of this study showed that the mean SBS values of eRMGIC were statistically higher compared to FP in all tested groups ( < 0.001). The mean SBS results of eRMGIC were non-significantly different from those recorded by RU 200 for all substrates except for the dentin substrate, where the RU200 cement produced significantly higher strength ( < 0.001). The failure modes were limited to a combination of mixed and adhesive failures without pure cohesive failure.
SIGNIFICANCE
The functionalization of FP with an organophosphorus co-monomer (2-MEP) directly affects the adhesion performance of the functionalized cement, which may be utilized to develop a new type of acid-base cement. It exhibited a performance comparable to that of resin-based cement and should serve well under different clinical conditions.
PubMed: 38765086
DOI: 10.1016/j.heliyon.2024.e30851 -
Journal of Dentistry Jul 2024The aim of this study is to compare the aesthetic outcomes of metal porcelain (C), lithium disilicate (T1) and porcelain-layered zirconium (T2) immediate... (Randomized Controlled Trial)
Randomized Controlled Trial Comparative Study
OBJECTIVES
The aim of this study is to compare the aesthetic outcomes of metal porcelain (C), lithium disilicate (T1) and porcelain-layered zirconium (T2) immediate implant-supported single crowns in the anterior maxilla.
MATERIALS AND METHODS
Forty-five immediate dental implants were provided for 45 patients that required the extraction of a single tooth in the anterior maxilla. A temporary prosthesis was provided at 8 weeks after placement followed by the final prosthesis at 24 weeks post-implantation. The patients were randomly allocated into 3 groups: 15 patients in the control group (C) received a metal-porcelain restoration, 15 patients (T1) received a lithium disilicate (LD) restoration and 15 patients (T2) received a porcelain-layered, zirconium (Z) restoration. Pink (PES) and White (WES) esthetic scores, radiographic bone levels, periodontal parameters and patient's esthetic satisfaction using a visual analogue scale (VAS) were evaluated at the time of final restoration placement (t0) and at 12-months post-loading (t12).
RESULTS
No implants were lost during the duration of this study. Statistically significant higher WES and VAS scores (p < 0.05) were recorded in T1 vs C and T1 vs T2 groups respectively. Similar radiographic bone levels and periodontal parameters were recorded in all groups.
CONCLUSION
Within the limitations of this study, it was concluded that T1 restorations provided better WES outcomes when compared to C restorations and better VAS scores when compared to T2 restorations at 12 months post-loading. Besides, different material interphases did not have an impact in PES, bone levels or periodontal parameters.
CLINICAL RELEVANCE
There is limited data comparing aesthetic outcomes of implant supported single crowns made of different ceramic materials based on accepted and comparable indexes and the evaluation of the patient's perspective regarding these aesthetic outcomes.
Topics: Humans; Esthetics, Dental; Dental Implants, Single-Tooth; Female; Male; Zirconium; Dental Porcelain; Crowns; Adult; Dental Prosthesis, Implant-Supported; Middle Aged; Treatment Outcome; Immediate Dental Implant Loading; Patient Satisfaction; Dental Materials; Maxilla; Metal Ceramic Alloys; Dental Prosthesis Design; Young Adult
PubMed: 38763385
DOI: 10.1016/j.jdent.2024.105067 -
JACC. Cardiovascular Interventions May 2024There was no study evaluating the effects of an aspirin-free strategy in patients undergoing complex percutaneous coronary intervention (PCI). (Comparative Study)
Comparative Study
BACKGROUND
There was no study evaluating the effects of an aspirin-free strategy in patients undergoing complex percutaneous coronary intervention (PCI).
OBJECTIVES
The authors aimed to evaluate the efficacy and safety of an aspirin-free strategy in patients undergoing complex PCI.
METHODS
We conducted the prespecified subgroup analysis based on complex PCI in the STOPDAPT-3 (ShorT and OPtimal duration of Dual AntiPlatelet Therapy after everolimus-eluting cobalt-chromium stent-3), which randomly compared low-dose prasugrel (3.75 mg/d) monotherapy to dual antiplatelet therapy (DAPT) with low-dose prasugrel and aspirin in patients with acute coronary syndrome or high bleeding risk. Complex PCI was defined as any of the following 6 criteria: 3 vessels treated, ≥3 stents implanted, ≥3 lesions treated, bifurcation with 2 stents implanted, total stent length >60 mm, or a target of chronic total occlusion. The coprimary endpoints were major bleeding events (Bleeding Academic Research Consortium 3 or 5) and cardiovascular events (a composite of cardiovascular death, myocardial infarction, definite stent thrombosis, or ischemic stroke) at 1 month.
RESULTS
Of the 5,966 study patients, there were 1,230 patients (20.6%) with complex PCI. Regardless of complex PCI, the effects of no aspirin relative to DAPT were not significant for the coprimary bleeding (complex PCI: 5.30% vs 3.70%; HR: 1.44; 95% CI: 0.84-2.47; P = 0.18 and noncomplex PCI: 4.26% vs 4.97%; HR: 0.85; 95% CI: 0.65-1.11; P = 0.24; P for interaction = 0.08) and cardiovascular (complex PCI: 5.78% vs 5.93%; HR: 0.98; 95% CI: 0.62-1.55; P = 0.92 and noncomplex PCI: 3.70% vs 3.10%; HR: 1.20; 95% CI: 0.88-1.63; P = 0.25; P for interaction = 0.48) endpoints without significant interactions.
CONCLUSIONS
The effects of the aspirin-free strategy relative to standard DAPT for the cardiovascular and major bleeding events were not different regardless of complex PCI. (ShorT and OPtimal duration of Dual AntiPlatelet Therapy after everolimus-eluting cobalt-chromium stent-3 [STOPDAPT-3]; NCT04609111).
Topics: Humans; Percutaneous Coronary Intervention; Platelet Aggregation Inhibitors; Male; Time Factors; Female; Aspirin; Aged; Middle Aged; Treatment Outcome; Hemorrhage; Dual Anti-Platelet Therapy; Risk Factors; Prasugrel Hydrochloride; Everolimus; Drug-Eluting Stents; Prosthesis Design; Drug Administration Schedule; Coronary Artery Disease; Coronary Thrombosis; Acute Coronary Syndrome; Chromium Alloys; Risk Assessment; Drug Therapy, Combination
PubMed: 38749592
DOI: 10.1016/j.jcin.2024.03.017 -
BMC Oral Health May 2024Alterations in the mechanical properties of the materials utilized in orthodontic appliances could affect the working properties of the appliances, thereby affecting... (Randomized Controlled Trial)
Randomized Controlled Trial Comparative Study
BACKGROUND
Alterations in the mechanical properties of the materials utilized in orthodontic appliances could affect the working properties of the appliances, thereby affecting clinical progress and outcome. Numerous studies have confirmed the correlation between alloy corrosion and raised surface roughness, which has a direct impact on the working characteristics of orthodontic archwires.
METHODS
Thirty nickel-titanium (NiTi) orthodontic archwires were utilized in this study. Patients were randomly selected and allocated into three groups according to the randomization plan; (The control group): subjects practiced regular oral hygiene; (The fluoride group): subjects used fluoride for intensive prophylaxis; (The chlorhexidine group): subjects used chlorhexidine. Representative samples were evaluated by SEM, and then SEM images with high resolution were examined using Image J software to determine the surface roughness and obtain the results for further statistical analysis.
RESULTS
Our findings indicated a significant difference was found between the three groups regarding the anterior and posterior parts between the control and the two other groups and a non-significant difference between NaF and CHX groups. Overall, the p-value for group comparisons was 0.000 for both parts, indicating a highly significant difference especially between the control and NaF groups.
CONCLUSION
Mouthwashes containing sodium fluoride demonstrated more significant surface alterations than the control and CHX groups and should be prescribed in accordance with orthodontic materials to reduce side effects.
Topics: Humans; Sodium Fluoride; Chlorhexidine; Corrosion; Surface Properties; Orthodontic Wires; Dental Alloys; Nickel; Alloys; Microscopy, Electron, Scanning; Titanium; Cariostatic Agents; Male; Female; Young Adult; Mouthwashes; Image Processing, Computer-Assisted; Adolescent; Adult; Oral Hygiene
PubMed: 38745154
DOI: 10.1186/s12903-024-04289-4 -
Journal of Breath Research May 2024Despite the widespread use of dental restorative materials, little information exists in the literature regarding their potential impact on bad breath. This in vitro...
Despite the widespread use of dental restorative materials, little information exists in the literature regarding their potential impact on bad breath. This in vitro study aims to fill this gap by investigating the influence of different restorative materials on the release of hydrogen sulfide (HS). Thirteen diverse dental restorative materials, including composites, flowable composites, glass ionomer restorative materials, high-copper amalgam, and CAD-CAM blocks, were examined. Cellulose Sponge models were used as negative and positive control. All samples were prepared with a diameter of 5 mm and a height of 2 mm. Except for the negative control group, all samples were embedded into Allium cepa L., and the emitted HS was measured using the Wintact W8802 hydrogen sulfide monitor. Surface roughness's effect on emission was explored by roughening the surfaces of CAD-CAM material samples, and gas emission was measured again. The data were statistically analyzed using the Kruskal-Wallis test and DSCF pairwise comparison tests. Fiber-reinforced flowable composite (EverX Flow), amalgam (Nova 70-caps), and certain composite materials (IPS Empress Direct, Tetric Evoceram, Admira Fusion X-tra) released higher HS concentrations compared to the negative control. The HS release period lasted longer in the same materials mentioned above, along with G-aenial Universal Injectable. Indirectly used materials, such as GC Cerasmart, Vita Enamic, and Vita YZ HT, demonstrated significantly lower emissions compared to other direct restoratives. Importantly, the surface roughness of indirect materials did not significantly affect peak HS concentrations or release times. The study reveals variations in HS release among restorative materials, suggesting potential advantages of indirect restorative materials in reducing HS-induced halitosis. This comprehensive understanding of the relationship between restorative materials and halitosis can empower both dental professionals and patients to make well-informed treatment choices. Notably, there is evidence supporting the enhanced performance of indirect restorative materials for individuals affected by halitosis.
Topics: Humans; Halitosis; Hydrogen Sulfide; Dental Materials; In Vitro Techniques; Dental Restoration, Permanent; Composite Resins; Materials Testing; Dental Amalgam; Surface Properties
PubMed: 38744271
DOI: 10.1088/1752-7163/ad4b57 -
Indian Journal of Dental Research :... Oct 2023To evaluate and compare the formation of dentinal defects using hand Hedstrom files, XP-Shaper, TruNatomy, and Reciproc Blue file systems when used for oval shaped root... (Comparative Study)
Comparative Study
AIM
To evaluate and compare the formation of dentinal defects using hand Hedstrom files, XP-Shaper, TruNatomy, and Reciproc Blue file systems when used for oval shaped root canals.
MATERIALS AND METHODS
One hundred and five extracted human mandibular premolars with single root and oval canals were selected for the study. Twenty-one teeth were unprepared (control), and the remaining teeth were divided into the prepared groups (n = 21), that is, Group H-Files, Group XP-Shaper, Group TruNatomy, and Group Reciproc Blue. All selected teeth were de-coronated perpendicular to the long axis of the tooth by using a diamond-coated disk with water cooling, leaving root segments approximately 16 mm in length. Each group was prepared according to the above file system. Then all roots were sectioned perpendicular to their long axes at 3, 6, and 9 mm from the apex using a diamond-coated disk under a continuous water stream. Each specimen was then checked for the presence of dentinal defects/microcracks.
RESULT
The XP-Endo shaper group had the lowest number of defects (01/21 roots) 4.7%; TN (04/21) 19%, H-Files (04/21) 19%, and RC Blue (05/21) 23.8% had the highest incidence of defects. However, no significant difference was detected among these groups (P > 0.05).
CONCLUSION
The motor-driven root canal instrumentation with rotary and reciprocating files and hand files may create microcracks in the radicular dentine, whereas the XP-Shaper file system produces minimal or less cracks compared to other tested rotary file systems and H-file instrumentation.
Topics: Humans; Root Canal Preparation; Dentin; Dental Pulp Cavity; Equipment Design; Dental Instruments; Bicuspid; Dental Alloys; Nickel; Titanium; Materials Testing; Rotation
PubMed: 38739827
DOI: 10.4103/ijdr.ijdr_132_23 -
Cureus Apr 2024The evolution of root canal instrumentation techniques has significantly impacted the field of endodontics, enhancing both the efficiency and outcomes of treatments.... (Review)
Review
The evolution of root canal instrumentation techniques has significantly impacted the field of endodontics, enhancing both the efficiency and outcomes of treatments. This review outlines the transition from manual to mechanical and rotary instruments, highlighting the role of nickel-titanium (NiTi) alloys and smart technologies in advancing procedural precision and reducing patient discomfort. Key historical developments and technological innovations, such as digital imaging and navigation systems, are explored for their contributions to improved clinical outcomes and patient satisfaction. Additionally, the review addresses the challenges presented by the complex anatomy of the root canal system and the advent of current instrumentation techniques. The potential of emerging trends, including artificial intelligence and advances in materials science, is discussed in the context of future endodontic practices. Despite the progress, challenges related to using advanced instrumentation methods, ethical considerations, and the cost factor of new technologies persist. The present review underscores the ongoing need for research and development to further refine root canal instrumentation techniques, ensuring that advancements in endodontic care remain patient-centered and accessible.
PubMed: 38738101
DOI: 10.7759/cureus.58045 -
Polymers Apr 2024The goal of the study was to compare the surface characteristics of typical implant materials used in orthopedic surgery and traumatology, as these determine their...
The goal of the study was to compare the surface characteristics of typical implant materials used in orthopedic surgery and traumatology, as these determine their successful biointegration. The morphological and chemical structure of Vortex plate anodized titanium from commercially pure (CP) Grade 2 Titanium (Ti2) is generally used in the following; non-cemented total hip replacement (THR) stem and cup Ti alloy (Ti6Al4V) with titanium plasma spray (TPS) coating; cemented THR stem Stainless steel (SS); total knee replacement (TKR) femoral component CoCrMo alloy (CoCr); cemented acetabular component from highly cross-linked ultrahigh molecular weight polyethylene (HXL); and cementless acetabular liner from ultrahigh molecular weight polyethylene (UHMWPE) (Sanatmetal, Ltd., Eger, Hungary) discs, all of which were examined. Visualization and elemental analysis were carried out by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Surface roughness was determined by atomic force microscopy (AFM) and profilometry. TPS Ti presented the highest R value (25 ± 2 μm), followed by CoCr (535 ± 19 nm), Ti2 (227 ± 15 nm) and SS (170 ± 11 nm). The roughness measured in the HXL and UHMWPE surfaces was in the same range, 147 ± 13 nm and 144 ± 15 nm, respectively. EDS confirmed typical elements regarding the investigated prosthesis materials. XPS results supported the EDS results and revealed a high % of Ti on Ti2 and TPS surfaces. The results indicate that the surfaces of prosthesis materials have significantly different features, and a detailed characterization is needed to successfully apply them in orthopedic surgery and traumatology.
PubMed: 38732662
DOI: 10.3390/polym16091193 -
BMC Oral Health May 2024Releasing of metal ions might implicate in allergic reaction as a negative subsequent of the corrosion of Stainless Steel (SS304) orthodontic wires. The aim of this...
BACKGROUND
Releasing of metal ions might implicate in allergic reaction as a negative subsequent of the corrosion of Stainless Steel (SS304) orthodontic wires. The aim of this study was to evaluate the corrosion resistance of zinc-coated (Zn-coated) SS orthodontic wires.
METHODS
Zinc coating was applied on SS wires by PVD method. Electrochemical impedance spectroscopy (EIS), Potentiodynamic polarization tests and Tafel analysis methods were used to predict the corrosion behavior of Zn-coated and uncoated SS wires in both neutral and acidic environments.
RESULTS
The values of E ,i and Rwhich were the electrochemical corrosion characteristics, reported better corrosion behavior of Zn-coated SS wires against uncoated ones in both artificial saliva and fluoride-containing environments. Experimental results of the Tafel plot analyses were consistent with that of electrochemical impedance spectroscopy analyses for both biological solutions.
CONCLUSION
Applying Zn coating on bare SS orthodontic wire by PVD method might increase the corrosion resistance of the underlying stainless-steel substrate.
Topics: Corrosion; Stainless Steel; Orthodontic Wires; Zinc; Dielectric Spectroscopy; Saliva, Artificial; Materials Testing; Dental Alloys; Coated Materials, Biocompatible; Fluorides; Hydrogen-Ion Concentration; Humans; Surface Properties; Potentiometry
PubMed: 38725023
DOI: 10.1186/s12903-024-04242-5 -
Nederlands Tijdschrift Voor... May 2024A 56-year-old woman presented with persistent unilateral gnathological complaints after replacing an amalgam restoration. The patient reported tension and pain in the...
A 56-year-old woman presented with persistent unilateral gnathological complaints after replacing an amalgam restoration. The patient reported tension and pain in the right side of her jaw, along with crackling sounds in the temporomandibular joint. Physical examination revealed tenderness in the right masseter muscle and temporomandibular joint, as well as anterior disc replacement with reduction on both sides. The initial treatment focused on providing rest to the temporomandibular joint, the Yoda exercise, and later, wet-needling. Despite initially limited improvement, the symptoms persisted. This case underscores the complexity and various treatment options for temporomandibular joint issues following dental procedures.
Topics: Humans; Female; Middle Aged; Temporomandibular Joint Disorders; Dental Amalgam; Treatment Outcome; Dental Restoration, Permanent
PubMed: 38715536
DOI: 10.5177/ntvt.2024.05.23106