Spotlight on therapeutic efficiency of green synthesis metals and their oxide nanoparticles in periodontitis

A state-of-the-art review of the recent advances in drug delivery systems for different therapeutic agents in periodontitis

Periodontitis (PD) is a chronic gum illness that may be hard to cure for a number of reasons, including the fact that no one knows what causes it, the side effects of anti-microbial treatment, and how various kinds of bacteria interact with one another. As a result, novel therapeutic approaches for PD treatment must be developed. Additionally, supplementary antibacterial regimens, including local and systemic medication administration of chemical agents, are necessary for deep pockets to assist with mechanical debridement of tooth surfaces. As our knowledge of periodontal disease and drug delivery systems (DDSs) grows, new targeted delivery systems like extracellular vesicles, lipid-based nanoparticles (NPs), metallic NPs, and polymer NPs have been developed. These systems aim to improve the targeting and precision of PD treatments while reducing the systemic side effects of antibiotics. Nanozymes, photodermal therapy, antibacterial metallic NPs, and traditional PD therapies have all been reviewed in this research. Medicinal herbs, antibiotics, photothermal therapy, nanozymes, antibacterial metallic NPs, and conventional therapies for PD have all been examined in this research. After that, we reviewed the key features of many innovative DDSs and how they worked for PD therapy. Finally, we have discussed the advantages and disadvantages of these DDSs.

Artificial Bone Materials for Infected Bone Defects: Advances in Antimicrobial Functions

Infected bone defects, caused by bacterial contamination following disease or injury, result in the partial loss or destruction of bone tissue. Traditional bone transplantation and other clinical approaches often fail to address the therapeutic complexities of these conditions effectively. In recent years, advanced biomaterials have attracted significant attention for their potential to enhance treatment outcomes. This review explores the pathogenic mechanisms underlying infected bone defects, including biofilm formation and bacterial internalization into bone cells, which allow bacteria to evade the host immune system. To control bacterial infection and facilitate bone repair, we focus on antibacterial materials for bone regeneration. A detailed introduction is given on intrinsically antibacterial materials (e.g., metal alloys, oxide materials, carbon-based materials, hydroxyapatite, chitosan, and Sericin). The antibacterial functionality of bone repair materials can be enhanced through strategies such as the incorporation of antimicrobial ions, surface modification, and the combined use of multiple materials to treat infected bone defects. Key innovations discussed include biomaterials that release therapeutic agents, functional contact biomaterials, and bioresponsive materials, which collectively enhance antibacterial efficacy. Research on the clinical translation of antimicrobial bone materials has also facilitated their practical application in infection prevention and bone healing. In conclusion, advancements in biomaterials provide promising pathways for developing more biocompatible, effective, and personalized therapies to reconstruct infected bone defects.

Green synthesized metal nanoparticles appear to meet expectations of low ecotoxicity: what about genotoxicity?

Advancements in technology and industry have made the use of nanomaterials indispensable. Due to concerns about the environmental damage caused by classical synthesis methods (Classical Synthesis, CS), the alternative 'Green Synthesis Method' (GS) has been developed, which aims to reduce toxicity by using environmentally friendly materials. This study examines whether nanoparticles synthesized through GS exhibit lower genotoxicity. To this end, research articles published between 2005 and 2025 on nanoparticle synthesis using the GS method were reviewed, and 551 studies were analyzed. The evaluation focused on gold, silver, platinum, copper, iron, and cobalt nanoparticles, which are widely used in various applications. The findings suggest that the GS method offers advantages in terms of genotoxicity. Additionally, this paper provides an in-depth analysis of how the GS method influences the properties of nanoparticles and explores the genotoxic mechanisms of nanoparticles synthesized through this approach.

Recent advances in nanomaterials and their mechanisms for infected wounds management

Wounds infected by bacteria pose a considerable challenge in the field of healthcare, particularly with the increasing prevalence of antibiotic-resistant pathogens. Traditional antibiotics often fail to achieve effective results due to limited penetration, resistance development, and inadequate local concentration at wound sites. These limitations necessitate the exploration of alternative strategies that can overcome the drawbacks of conventional therapies. Nanomaterials have emerged as a promising solution for tackling bacterial infections and facilitating wound healing, thanks to their distinct physicochemical characteristics and multifunctional capabilities. This review highlights the latest developments in nanomaterials that demonstrated enhanced antibacterial efficacy and improved wound healing outcomes. The antibacterial mechanisms of nanomaterials are varied, including ion release, chemodynamic therapy, photothermal/photodynamic therapy, electrostatic interactions, and delivery of antibacterial drugs, which not only combat bacterial infections but also address the challenges posed by biofilms and antibiotic resistance. Furthermore, these nanomaterials create an optimal environment for tissue regeneration, promoting faster wound closure. By leveraging the unique attributes of nanomaterials, there is a significant opportunity to revolutionize the management of infected wounds and markedly improve patient outcomes.

Functional hydrogels promote chronic infectious wound healing by re-rousing macrophage M1 and inducing bacterial copper-like death

Traditional antibiotics are often ineffective against biofilm-associated infections, and biofilm-induced macrophage immune evasion directly halts the wound healing process. Disrupting biofilms and regulating macrophage immune functions are critical to improving wound healing. In this study, we synthesized g-C3N4 with peroxidase (POD) enzyme activity via thermal polymerization and copper alginate microspheres (CAM) via gas cutting. These were co-encapsulated into GelMA hydrogels to form a functionalized wound repair system (GelMA/CAM@g-C3N4) with both anti-biofilm and local immune microenvironment remodeling capabilities. In vitro, this system exhibited excellent biocompatibility and promoted endothelial cell migration, vascular formation, and CD31 expression. It also polarized macrophages toward the M1 phenotype, restoring their pro-inflammatory functions, upregulating inflammatory cytokines (IL-1, IL-6, TNF-α), and inhibiting Staphylococcus aureus and Escherichia coli. In vivo, the system suppressed S. aureus growth, promoted angiogenesis and collagen deposition, and reshaped the pathological microenvironment to achieve wound repair and regeneration. Conclusions: This system offers a new therapeutic strategy for chronic infectious wounds.

3D-printed zinc oxide nanoparticles modified barium titanate/hydroxyapatite ultrasound-responsive piezoelectric ceramic composite scaffold for treating infected bone defects

Clinically, infectious bone defects represent a significant threat, leading to osteonecrosis, severely compromising patient prognosis, and prolonging hospital stays. Thus, there is an urgent need to develop a bone graft substitute that combines broad-spectrum antibacterial efficacy and bone-inductive properties, providing an effective treatment option for infectious bone defects. In this study, the precision of digital light processing (DLP) 3D printing technology was utilized to construct a scaffold, incorporating zinc oxide nanoparticles (ZnO-NPs) modified barium titanate (BT) with hydroxyapatite (HA), resulting in a piezoelectric ceramic scaffold designed for the repair of infected bone defects. The results indicated that the addition of ZnO-NPs significantly improved the piezoelectric properties of BT, facilitating a higher HA content within the ceramic scaffold system, which is essential for bone regeneration. In vitro antibacterial assessments highlighted the scaffold's potent antibacterial capabilities. Moreover, combining the synergistic effects of low-intensity pulsed ultrasound (LIPUS) and piezoelectricity, results demonstrated that the scaffold promoted notable osteogenic and angiogenic potential, enhancing bone growth and repair. Furthermore, transcriptomics analysis results suggested that the early growth response-1 (EGR1) gene might be crucial in this process. This study introduces a novel method for constructing piezoelectric ceramic scaffolds exhibiting outstanding osteogenic, angiogenic, and antibacterial properties under the combined influence of LIPUS, offering a promising treatment strategy for infectious bone defects.

Dual Action of Nanostructured α-Mangostin-Copper Oxide Complexes Against Dental Pathogen Biofilms and Oral Cancer via Apoptosis Gene Modulation

The development of effective treatments for dental pathogens and oral cancer remains a significant challenge. Copper oxide nanoparticles (CuO NPs) are recognized for their strong antimicrobial properties, attributed to the synthesis of oxygen-dependent radicals. α-Mangostin (MG), a natural xanthone from mangosteen fruit, is well-known for its antioxidant, antimicrobial, and anticancer potential. The combination of CuO NPs with MG would offer a synergistic approach to enhance therapeutic efficacy. CuO-MG NPs were synthesized and characterized for their size, morphology, and surface properties. The antimicrobial efficacy of these nanoparticles was tested against oral pathogens, including Staphylococcus aureus, Enterococcus faecalis, Streptococcus mutans, and Candida albicans. Antioxidant activity was assessed using superoxide anion and hydroxyl radical anion. The anticancer potential was evaluated by examining apoptosis induction in oral cancer cell lines, focusing on the expression of key apoptotic markers such as Caspase-3, Caspase-8, and FasL. Molecular docking simulations were performed to understand the interaction between MG and biofilm receptors. The CuO-MG NPs evidenced significant antimicrobial efficacy against all tested oral pathogens, with enhanced efficacy attributed to the combined effects of CuO-induced oxidative stress and the antimicrobial properties of MG. Antioxidant assays demonstrated a dose-dependent increase in radical scavenging activity. In oral cancer cells, CuO-MG NPs significantly reduced cell viability and induced apoptosis, as evidenced by the up-regulation of Caspase-3, Caspase-8, and FasL. Molecular docking studies revealed strong binding affinities of MG to key biofilm receptors, disrupting pathogen adhesion and biofilm formation. The combination of CuO NPs and MG offers a powerful and multifaceted therapeutic approach to oral healthcare. CuO-MG NPs demonstrate synergistic antimicrobial, antioxidant, and anticancer properties, offering a potential approach for the management of oral infections and oral cancer. Further preclinical and clinical studies are recommended to ensure their safety and stability in medical applications.

Review of carbonaceous nanoparticles for antibacterial uses in various dental infections

The mouth cavity is the second most complex microbial community in the human body. It is composed of bacteria, viruses, fungi, and protozoa. An imbalance in the oral microbiota may lead to various conditions, including caries, soft tissue infections, periodontitis, root canal infections, peri-implantitis (PI), pulpitis, candidiasis, and denture stomatitis. Additionally, several locally administered antimicrobials have been suggested for dentistry in surgical and non-surgical applications. The main drawbacks are increased antimicrobial resistance, the risk of upsetting the natural microbiota, and hypersensitivity responses. Because of their unique physiochemical characteristics, nanoparticles (NPs) can circumvent antibiotic-resistance mechanisms and exert antimicrobial action via a variety of new bactericidal routes. Because of their anti-microbial properties, carbon-based NPs are becoming more and more effective antibacterial agents. Periodontitis, mouth infections, PI, dentin and root infections, and other dental diseases are among the conditions that may be treated using carbon NPs (CNPs) like graphene oxide and carbon dots. An outline of the scientific development of multifunctional CNPs concerning oral disorders will be given before talking about the significant influence of CNPs on dental health. Some of these illnesses include Periodontitis, oral infections, dental caries, dental pulp disorders, dentin and dental root infections, and PI. We also review the remaining research and application barriers for carbon-based NPs and possible future problems.

The role of green synthesis metal and metal oxide nanoparticles in oral cancer therapy: a review

There are 275,000 new cases of oral cancer (OC) per year, making it the sixth most common cancer in the world. Severe adverse effects, including loss of function, deformity, and systemic toxicity, are familiar with traditional therapies such as radiation, chemotherapy, and surgery; due to their unique properties, nanoparticles (NPs) have emerged as a superior alternative over chemo/radiotherapy and surgery due to their targeting capability, bioavailability, compatibility, and high solubility. Due to their unique properties, metallic NPs have garnered significant attention in OC control. In addition to the fact that metal NPs may be harmful to human cells, the reactive chemicals used to make them pose the same risk, which limits their use in medicine. Green synthesis (GS) is a novel strategy that uses biological materials like yeast, bacteria, fungi, and plant extracts. Compared to more traditional chemical synthesis processes, these are more environmentally benign and manageable for living organisms. This article summarises the GS of NPs made of metals and metal oxides and their anticancer effects on OC. The method's potential benefits and drawbacks in advancing metallic NPs' GS and shaping OC therapy's future were also discussed.

Revolutionizing oral care: Reactive oxygen species (ROS)-Regulating biomaterials for combating infection and inflammation

The human oral cavity is home to a delicate symbiosis between its indigenous microbiota and the host, the balance of which is easily perturbed by local or systemic factors, leading to a spectrum of oral diseases such as dental caries, periodontitis, and pulp infections. Reactive oxygen species (ROS) play crucial roles in the host's innate immune defenses. However, in chronic inflammatory oral conditions, dysregulated immune responses can result in excessive ROS production, which in turn exacerbates inflammation and causes tissue damage. Conversely, the potent antimicrobial properties of ROS have inspired the development of various anti-infective therapies. Therefore, the strategic modulation of ROS by innovative biomaterials is emerging as a promising therapeutic approach for oral infection and inflammation. This review begins by highlighting the state-of-the-art of ROS-regulating biomaterials, which are designed to generate, scavenge, or modulate ROS in a bidirectional manner. We then delve into the latest innovations in these biomaterials and their applications in treating a range of oral diseases, including dental caries, endodontic and periapical conditions, periodontitis, peri-implantitis, and oral candidiasis. The review concludes with an overview of the current challenges and future potential of these biomaterials in clinical settings. This review provides novel insights for the ongoing development of ROS-based therapeutic strategies for oral diseases.

A review on the potential use of bismuth nanoparticles in oral health

According to many investigations, persistent oral infections may be caused by oral pathogenic biofilms. Irritation of soft tissues and subsequent bone resorption due to bacterial biofilm contamination of the implant further worsen oral health. Dental problems may be effectively treated using metal nanoparticles (NPs) because they limit the development of many different types of bacteria. With their low toxicity, X-ray sensitivity, high atomic number, near-infrared driven semiconductor qualities, and cheap cost, multifunctional bismuth (Bi) NPs with therapeutic activities show significant potential for the domains of bacterial infection diagnostics and treatment. Also, by directly communicating with the bacterial cell wall, stimulating intracellular effects, inhibiting biofilm formation, producing reactive oxygen species, and inducing adaptive and innate immune responses, BiNPs offer an alternative to conventional antibiotics for treating bacteria with multiple drug resistance (MDR). Hence, BiNPs, which have more antibacterial activity and fewer side effects than chlorhexidine, might be a promising option to fight biofilm-forming bacteria in the mouth. This could lead to their usage in several areas of dentistry. The research delves into the many synthesis techniques of BiNPs and their antibacterial and anticancer capabilities. Next, we'll review how this nanoparticle has helped with dental infections, periodontitis, and dental implant problems. The anticancer effects of BiNPs on oral cancer were also studied. Thus, after this paper, we have highlighted the therapeutic limits and ways to address this issue for the clinical success of BiNPs in promoting oral and dental health.

Comparative drug release kinetics of Terminalia arjuna mediated SeNPs NanoGel and ZnONPs NanoGel - An in-vitro study

Background

This study compared the drug release kinetics of Terminalia arjuna mediated selenium nanoparticles (SeNPs) gel and zinc oxide nanoparticles (ZnONPs) gel for their potential in local drug delivery for chronic periodontitis.

Material and method

The drug release was evaluated in-vitro by conducting tests on different formulations, including 1 %, 2 %, 3 %, 4 %, and 5 % Terminalia arjuna mediated SeNPs gel and ZnONPs gel. Each sample, approximately 0.1 mg, was mixed with 10 mL of phosphate buffer saline (PBS) at various pH levels and maintained at 37 °C. The suspension was then placed in an incubated shaker at 120 rpm for 1 h. Five-milliliter samples were withdrawn from the dissolution medium at 30-min intervals and replaced with fresh PBS buffer to maintain a constant volume. The released drug amount was measured using a UV spectrophotometer (Systronics, India) at 290 nm.

Result

The investigation revealed that SeNPs gel exhibited higher drug release percentages compared to ZnONPs gel across various concentrations and time points. The sustained release profiles of both formulations suggest effective control over drug release, maintaining therapeutic drug levels over an extended period. The near-complete release of the drug at 500 min highlights the potential for prolonged therapeutic efficacy, reducing the need for frequent dosing and enhancing patient compliance.

Conclusion

Terminalia arjuna mediated SeNPs gel shows promise for more rapid and sustained drug delivery in the management of chronic periodontitis through local drug delivery systems.

Antimicrobial Activity of Nano-GeO2/CTAB Complex Against Fungi and Bacteria Isolated from Paper

Microbial attack, particularly fungal degradation of cellulose, is a leading cause of paper damage. To address fungal spores and the rising concern of microbial drug resistance, a nano-Germanium dioxide (GeO2)/cetyltrimethylammonium bromide (CTAB) complex (nano-GeO2/CTAB complex) with potent antibacterial properties was synthesized. Its inhibitory effects were evaluated against bacteria, including Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli, as well as fungi isolated from paper (Fusarium spp., Aspergillus spp., and Penicillium citrinum). The nano-GeO2/CTAB complex exhibited significant (p < 0.05) inhibitory effects against S. aureus and E. coli. Moreover, a 60 min treatment with 1 mg/mL of the complex significantly inhibited the growth of all tested fungi and reduced their biomass after five days of culture, while 4 mg/mL completely deactivated spores. Filter paper pre-treated with the nano-GeO2/CTAB complex showed complete resistance to microbial attack, exhibiting no fungal growth and a clear inhibition zone devoid of bacterial growth. In contrast, untreated controls displayed fungal coverage exceeding 95% within five days. These findings highlight the nano-GeO2/CTAB complex as a promising antimicrobial agent for protecting paper materials from microbial degradation.

Albumin nanoparticles are a promising drug delivery system in dentistry

Periodontal infection is a long-lasting inflammatory condition caused by the growth and development of an abnormal and harmful community of microorganisms. This destructive illness leads to the loss of the tissues that support the teeth, degradation of the bone surrounding the teeth, and eventually tooth loss. To treat oral infections, it is necessary to use nonsurgical methods such as antibiotics. However, the indiscriminate and incorrect use of antibiotics results in drug resistance. Among these alternate therapeutic options, using nanoparticles to treat infectious dental disease was particularly significant. Consequently, researchers have worked to develop an effective and satisfactory drug delivery method for treating periodontal and dental illnesses. Albumin nanoparticles serve a considerable function as carriers in the drug delivery of chemical and biomolecular medications, such as anticancer treatments; they have several advantages, including biocompatibility and biodegradability, and they are well-tolerated with no adverse effects. Albumin nanoparticles have several benefits over other nanomaterials. Protein nanocarriers provide advantages such as biocompatibility, biodegradability, reduced immunogenicity, and lower cytotoxicity. Furthermore, this nanoparticle demonstrated significant intrinsic antibacterial properties without being loaded with antibiotic medicines. As a medication and antibacterial nanoparticle delivery method, albumin nanoparticles have substantial applications in periodontal and dental infectious disorders such as periodontal infection, apical periodontitis, and peri-implantitis. As a result, in this article, we studied the usage of albumin nanoparticles in dental disorders.

Microbiological evaluation of vitamin C rich acerola mediated silver and copperoxide nanogel in treatment of periodontitis with and without diabetes mellitus

Aim

Nanotechnology presents a promising approach for managing chronic periodontitis, a common oral disease characterized by gum inflammation and loss of supporting bone around teeth. This study aimed to evaluate the antimicrobial efficacy of acerola-mediated silver nanoparticles (AgNPs) gel and copper oxide nanoparticles (CuONPs) gel in periodontitis patients with and without diabetes.

Materials and methods

The antimicrobial efficacy of acerola-mediated AgNPs gel and CuONPs nanogel was assessed using the agar well diffusion technique, Minimum Inhibitory Concentration (MIC) assay, Minimum Bactericidal Concentration (MBC) analysis, time-kill curve assay, and cytoplasmic and protein leakage analysis from periodontitis patients with and without diabetes.

Results

The study found that acerola-mediated AgNPs gel demonstrated more consistent and effective antimicrobial activity against periodontitis, with lower MIC and MBC values compared to the CuONPs gel, across all tested concentrations. These results suggest that acerola-mediated AgNPs gel may be a more effective and targeted therapeutic agent for periodontal disease management.

Conclusion

The findings emphasize the importance of nanoparticle gel concentration in optimizing periodontal treatment outcomes. Acerola-mediated AgNPs gel, with its superior efficacy and consistency in bactericidal activity, shows significant potential for periodontal therapy.

Clinical significance

Innovative nanoparticles like copper and silver oxides exhibit antibacterial, anti-inflammatory, and antioxidant properties, making them promising agents for targeting periodontal pathogens. Acerola (Malpighia emarginata), with its high vitamin C content and antioxidant properties, is beneficial in mitigating oxidative stress associated with chronic periodontitis.

Integrating enzyme-nanoparticles bring new prospects for the diagnosis and treatment of immune dysregulation in periodontitis

Enzymes play a significant role in mediating inflammatory and immune responses in periodontitis. Effective diagnosis, timely treatment, and continuous management of periodontal enzymes are essential to prevent undesirable consequences; however, this remains a significant challenge. Nanoparticles (NPs) have attracted significant attention in biomedicine because of their advantageous nanosized effects. NPs are conjugated with specific enzyme substrates at responsive sites that are triggered by periodontitis enzyme biomarkers, leading to functional or characteristic changes. In contrast, NPs with enzyme-mimetic activities exhibit catalytic activity, effectively destroying pathogenic biofilms and modulating the immune response in periodontitis. The unique properties of enzyme-targeting NPs have enabled the development of biosensors and fluorescent probes capable of identifying enzyme biomarkers associated with periodontitis. Enzyme-responsive and enzyme-mimetic NPs both exert therapeutic applications in the treatment of periodontitis. In this review, we provide a comprehensive overview of the enzymes associated with periodontitis, the mechanisms of enzyme-responsive and enzyme-mimetic NPs, recent advancements in the use of NPs for detecting these enzymes, and the therapeutic applications of NPs in targeting or mimicking enzyme functions. We also discuss the challenges and prospects of using NPs in the diagnosis and treatment of periodontitis.

Unlocking the potential of RGD-conjugated gold nanoparticles: a new frontier in targeted cancer therapy, imaging, and metastasis inhibition

In the rapidly evolving field of cancer therapeutics, the potential of gold nanoparticles (AuNPs) conjugated with RGD peptides has emerged as a promising avenue for targeted therapy and imaging. Despite numerous studies demonstrating the effectiveness of RGD-conjugated AuNPs in specifically targeting tumor cells and enhancing radiation therapy (RT), a comprehensive review of these advancements is currently lacking. This review aims to fill this critical gap in the literature. Our analysis reveals that RGD-conjugated AuNPs have shown significant promise in improving the diagnosis and treatment of various types of cancer, including breast cancer. However, the full potential of this technology is yet to be realized. The development of multifunctional nanoplatforms incorporating AuNPs has opened new horizons for targeted therapy, dual-mode imaging, and inhibition of tumor growth and metastasis. This review is of paramount importance as it provides a comprehensive overview of the current state of research in this area, and highlights the areas where further research is needed. It is hoped that this review will inspire further investigations into this promising nanotechnology, ultimately leading to improved cancer diagnosis and therapy. Therefore, the findings presented in this review underscore the potential of AuNPs conjugated with RGD peptides as a revolutionary approach in cancer therapeutics. It is our fervent hope that this review will serve as a catalyst for further research in this exciting field.

Green synthesis of NiO and NiO@graphene oxide nanomaterials using Elettaria cardamomum leaves: Structural and electrochemical studies

An eco-friendly synthetic route was developed for the formation of nickel oxide (NiOaq and NiOet) nanoparticles (NPs) by treating Ni(NO3)2.6H2O with aqueous/ethanolic extracts of Elettaria cardamomum leaves; the same reaction was performed in the presence of graphene oxide (GO) to produce NiOaq@GO and NiOet@GO nanocomposites (NCs), respectively. The NMs were characterized by XRD, FT-IR, SEM, EDX, UV-visible spectroscopy, and TGA-DSC analysis. They were also subjected to electrochemical investigations and photocatalytic degradation of crystal violet (CV) dye. XRD analysis revealed the average crystallite sizes of 8.84-14.07 nm with a face-centered cubic form of NiO NPs and a hexagonal structure of their nanocomposites with GO. FT-IR spectroscopy confirmed the presence of Ni-O vibrations at 443-436 cm-1. SEM images confirmed the spherical morphology of NiO NPs while NiOaq@GO NCs contained randomly aggregated, thin, and wrinkled graphene sheets. NiOaq and NiOet have shown particle sizes of 27.7-30.63 nm which were decreased to 19.33-26.39 nm in their respective NiOaq@GO and NiOet@GO NCs. EDX spectra verified the homogeneous distribution of elements (Ni, O, C) on the surface of the particles. The synthesized NCs have shown smaller band gaps (NiOaq@GO = 3.74 eV; NiOet@GO = 3.34 eV) as compared to their respective NPs (NiOaq = 5.0 eV; NiOet = 3.89 eV). TGA/DSC data was used to find the thermal stabilities, glass transition temperatures, and enthalpies. Cyclic voltammetry measurements exhibited distinct oxidation and reduction peaks. NCs exhibited better potential as electrode materials for supercapacitor applications as compared to their respective NPs. NiOet@GO exhibited the best electrochemical performance and photocatalytic degradation efficiency of CV dye. After 120 min exposure to sunlight, the degradation coefficient of CV was observed to be 82.93, 86.34, 89.99, 90.27 and 81.65 % in the presence of NiOaq, NiOet, NiOaq@GO, NiOet@GO and GO, respectively.

Potential role of metal nanoparticles in treatment of peri-implant mucositis and peri-implantitis

Peri-implantitis (PI), a pathological condition associated with plaque, affects the tissues around dental implants. In addition, peri-implant mucositis (PIM) is a precursor to the destructive inflammatory PI and is an inflammation of the soft tissues surrounding the dental implant. It is challenging to eradicate and regulate the PI treatment due to its limited effectiveness. Currently, there is a significant interest in the development and research of additional biocompatible materials to prevent the failure of dental implants. Nanotechnology has the potential to address or develop solutions to the significant challenge of implant failure caused by cytotoxicity and biocompatibility in dentistry. Nanoparticles (NPs) may be used as carriers for the release of medicines, as well as to make implant coatings and supply appropriate materials for implant construction. Furthermore, the bioactivity and therapeutic efficacy of metal NPs in peri-implant diseases (PID) are substantiated by a plethora of in vitro and in vivo studies. Furthermore, the use of silver (Ag), gold (Au), zinc oxide, titanium oxide (TiO2), copper (Cu), and iron oxide NPs as a cure for dental implant infections brought on by bacteria that have become resistant to several medications is the subject of recent dentistry research. Because of their unique shape-dependent features, which enhance bio-physio-chemical functionalization, antibacterial activity, and biocompatibility, metal NPs are employed in dental implants. This study attempted to provide an overview of the application of metal and metal oxide NPs to control and increase the success rate of implants while focusing on the antimicrobial properties of these NPs in the treatment of PID, including PIM and PI. Additionally, the study reviewed the potential benefits and drawbacks of using metal NPs in clinical settings for managing PID, with the goal of advancing future treatment strategies for these conditions.

The Integration of Gold Nanoparticles into Dental Biomaterials as a Novel Approach for Clinical Advancement: A Narrative Review

Gold nanoparticles (AuNPs) have gained significant attention in the biomedical field owing to their versatile properties. AuNPs can be customized by modifying their size, shape and surface characteristics. In recent years, extensive research has explored the integration of AuNPs into various dental materials, including titanium, polymethylmethacrylate (PMMA) and resin composites. This review aims to summarize the advancements in the application of modified AuNPs in dental materials and to assess their effects on related cellular processes in the dental field. Relevant articles published in English on AuNPs in association with dental materials were identified through a systematic search of the PubMed/MEDLINE, Embase, Scopus and ScienceDirect databases from January 2014 to April 2024. Future prospects for the utilization of AuNPs in the field of dentistry are surveyed.

A Comprehensive Review on the Importance of Sustainable Synthesized Coinage Metal Nanomaterials and Their Diverse Biomedical Applications

From a historical perspective, coinage metals (CMNMs) are most renowned for their monetary, ornamental, and metallurgical merits; nevertheless, as nanotechnology's potential has only just come to light, their metal nanostructures and uses may be viewed as products of modern science. Notable characteristics of CMNMs include visual, electrical, chemical, and catalytic qualities that depend on shape and size. Due diligence on the creation and synthesis of CMNMs and their possible uses has been greatly promoted by these characteristics. This review focuses on solution-based methods and provides an overview of the latest developments in CMNMs and their bimetallic nanostructures. It discusses a range of synthetic techniques, including conventional procedures and more modern approaches used to enhance functionality by successfully manipulating the CMNMs nanostructure's size, shape, and composition. To help with the design of new nanostructures with improved capabilities in the future, this study offers a brief assessment of the difficulties and potential future directions of these intriguing metal nanostructures. This review focuses on mechanisms and factors influencing the synthesis process, green synthesis, and sustainable synthesis methods. It also discusses the wide range of biological domains in which CMNMs are applied, including antibacterial, antifungal, and anticancer. Researchers will therefore find the appropriateness of both synthesizing and using CMNMS keeping in mind the different levels of environmental effects.

The ROS Mediates MCUb in Mitochondria-Regulated Apoptosis of TM4 Cells Induced by Titanium Dioxide Nanoparticles

Titanium dioxide nanoparticles (TiO2 NPs) can cause mitochondrial apoptosis of TM4 cells associated with reactive oxygen species (ROS) accumulation and Ca2+ overload, but the relations among these processes remain unclear. This study aimed to evaluate whether the accumulation of ROS caused by TiO2 NPs inhibits MCUb expression, leading to mitochondrial calcium overload and subsequent cell apoptosis through the mitochondrial pathway. TM4 cells were exposed to different concentrations of TiO2 NPs (0, 25, 50, 75, 100 μg/mL) for 24 h. We assessed cell viability, ROS level, MCUb and VDAC1 expression, mitochondrial and cytoplasmic Ca2+ levels, mitochondrial membrane potential (MMP), apoptosis rate, and key proteins related to mitochondrial apoptosis (Bcl-2, Bax, Caspase 3, Caspase 9, p53 and Cyt c). Additionally, the effect of N-acetylcysteine (NAC) on MCUb expression, calcium homeostasis, and cell apoptosis was evaluated. Compared to control group, TiO2 NPs significantly increased ROS level, downregulated MCUb expression, elevated Ca2+ levels in mitochondria and cytoplasm, and enhanced mitochondria-regulated apoptosis, starting from the 50 μg/mL TiO2 NPs group. However, NAC significantly increased MCUb expression, attenuated Ca2+ levels in mitochondria and cytoplasm, and reduced mitochondria-related apoptosis. In conclusion, TiO2 NPs induced ROS accumulation, which inhibited the expression of MCUb. The decreased MCUb level led to Ca2+ overload in mitochondria, causing TM4 cell apoptosis via the mitochondrial pathway. This research elucidates, for the first time, the role of MCUb and its relation with ROS in apoptosis of TM4 cells induced by TiO2 NPs, which supplementing the molecular mechanism of cell apoptosis caused by TiO2 NPs.

An In Vitro Study of Antioxidant, Anti-inflammatory, and Cytotoxic Effects of Echinacea-Mediated Zinc Oxide Nanoparticles

Background Plant extracts, such as Echinacea, are preferred in the pharmaceutical industry for their natural availability and minimal adverse effects. Echinacea is known for its anti-inflammatory and other biological properties. Zinc oxide nanoparticles (ZnONPs) are cost-effective, safe, and easily synthesized, making them prominent in nanoparticle research. This study aims to determine the anti-inflammatory, cytotoxic, and antioxidant properties of ZnONPs synthesized using Echinacea. Methodology In this study, 5 mg of powdered Echinacea was mixed with 100 mL of distilled water, heated at 44°C until vaporization, cooled, and filtered twice. The extract was mixed with 0.1 g of zinc oxide and exposed to sunlight for two weeks for nanoparticle synthesis. After centrifugation at 3,500 rpm for eight minutes, nanoparticles were collected. Scanning electron microscope analysis was done to determine nanoparticle formation. Cytotoxicity analysis was conducted using the brine shrimp method, with surviving nauplii counted after exposure to different nanoparticle concentrations. Antioxidant activity was assessed via 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and ferric-reducing antioxidant power (FRAP) assay. Anti-inflammatory activity was assessed using membrane stabilization assay and bovine serum albumin (BSA) assay. Using SPSS Statistics Version 23 (IBM Corp., Armonk, NY, USA), the mean and standard deviation between the prepared extract and the standard were compared for all assays. Results In the cytotoxicity assessment, at 5 µL, the mortality of nauplii remained unchanged from the control. However, at 10 and 20 µL, a 10% increase in mortality was observed, which then stabilized at 40 and 80 µL with 20%. Regarding antioxidant activity, as nanoparticle concentration increased from 10 to 50 µL in the DPPH and FRAP assays, their effectiveness also increased accordingly. According to the anti-inflammatory assay, the membrane stabilization and BSA assay showed an increase in activity with increasing concentrations of 10 to 50 μL extract against similar concentrations of standard diclofenac sodium. Conclusions Echinacea-based ZnONPs demonstrated effective antioxidant and anti-inflammatory properties with low cytotoxicity, suggesting their potential use in future pharmaceutical or therapeutic applications.

The potential use of nanozymes as an antibacterial agents in oral infection, periodontitis, and peri-implantitis

Several studies suggest that oral pathogenic biofilms cause persistent oral infections. Among these is periodontitis, a prevalent condition brought on by plaque biofilm. It can even result in tooth loss. Furthermore, the accumulation of germs around a dental implant may lead to peri-implantitis, which damages the surrounding bone and gum tissue. Furthermore, bacterial biofilm contamination on the implant causes soft tissue irritation and adjacent bone resorption, severely compromising dental health. On decontaminated implant surfaces, however, re-osseointegration cannot be induced by standard biofilm removal techniques such as mechanical cleaning and antiseptic treatment. A family of nanoparticles known as nanozymes (NZs) comprise highly catalytically active multivalent metal components. The most often employed NZs with antibacterial activity are those that have peroxidase (POD) activity, among other types of NZs. Since NZs are less expensive, more easily produced, and more stable than natural enzymes, they hold great promise for use in various applications, including treating microbial infections. NZs have significantly contributed to studying implant success rates and periodontal health maintenance in periodontics and implantology. An extensive analysis of the research on various NZs and their applications in managing oral health conditions, including dental caries, dental pulp disorders, oral ulcers, peri-implantitis, and bacterial infections of the mouth. To combat bacteria, this review concentrates on NZs that imitate the activity of enzymes in implantology and periodontology. With a view to the future, there are several ways that NZs might be used to treat dental disorders antibacterially.

Recent advances in nanomaterial-based biosensor for periodontitis detection

Periodontitis, a chronic inflammatory condition caused by bacteria, often causes gradual destruction of the components that support teeth, such as the alveolar bone, cementum, periodontal ligament, and gingiva. This ultimately results in teeth becoming loose and eventually falling out. Timely identification has a crucial role in preventing and controlling its progression. Clinical measures are used to diagnose periodontitis. However, now, there is a hunt for alternative diagnostic and monitoring methods due to the progress of technology. Various biomarkers have been assessed using multiple bodily fluids as sample sources. Furthermore, conventional periodontal categorization factors do not provide significant insights into the present disease activity, severity and amount of tissue damage, future development, and responsiveness to treatment. In recent times, there has been a growing utilization of nanoparticle (NP)-based detection strategies to create quick and efficient detection assays. Every single one of these platforms leverages the distinct characteristics of NPs to identify periodontitis. Plasmonic NPs include metal NPs, quantum dots (QDs), carbon base NPs, and nanozymes, exceptionally potent light absorbers and scatterers. These find application in labeling, surface-enhanced spectroscopy, and color-changing sensors. Fluorescent NPs function as photostable and sensitive instruments capable of labeling various biological targets. This article presents a comprehensive summary of the latest developments in the effective utilization of various NPs to detect periodontitis.

Mesenchymal Stem Cell-based Scaffolds in Regenerative Medicine of Dental Diseases

Biomedical engineering breakthroughs and increased patient expectations and requests for more comprehensive care are propelling the field of regenerative dentistry forward at a fast pace. Stem cells (SCs), bioactive compounds, and scaffolds are the mainstays of tissue engineering, the backbone of regenerative dentistry. Repairing damaged teeth and gums is a significant scientific problem at present. Novel therapeutic approaches for tooth and periodontal healing have been inspired by tissue engineering based on mesenchymal stem cells (MSCs). Furthermore, as a component of the MSC secretome, extracellular vesicles (EVs) have been shown to contribute to periodontal tissue repair and regeneration. The scaffold, made of an artificial extracellular matrix (ECM), acts as a supporting structure for new cell development and tissue formation. To effectively promote cell development, a scaffold must be non-toxic, biodegradable, biologically compatible, low in immunogenicity, and safe. Due to its promising biological characteristics for cell regeneration, dental tissue engineering has recently received much attention for its use of natural or synthetic polymer scaffolds with excellent mechanical properties, such as small pore size and a high surface-to-volume ratio, as a matrix. Moreover, as a bioactive material for carrying MSC-EVs, the combined application of scaffolds and MSC-EVs has a better regenerative effect on dental diseases. In this paper, we discuss how MSCs and MSC-derived EV treatment may be used to regenerate damaged teeth, and we highlight the role of various scaffolds in this process.