Oral Products Research Articles

Development of Solid Lipid Nanoparticles for Controlled Amiodarone Delivery.

In various drug delivery systems, solid lipid nanoparticles are dominantly lipid-based nanocarriers. Amiodarone hydrochloride is an antiarrhythmic agent used to treat severe rhythm disturbances. It has variable and hard-to-predict absorption in the gastrointestinal tract because of its low solubility and high permeability. The aims of this study were to improve its solubility by encapsulating amiodarone into solid lipid nanoparticles using two excipients-Compritol® 888 ATO (pellets) (C888) as a lipid matrix and Transcutol® (T) as a surfactant. Six types of amiodarone-loaded solid lipid nanoparticles (AMD-SLNs) were obtained using a hot homogenization technique followed by ultrasonication with varying sonication parameters. AMD-SLNs were characterized by their size distribution, polydispersity index, zeta potential, entrapment efficiency, and drug loading. Based on the initial evaluation of the entrapment efficiency, only three solid lipid nanoparticle formulations (P1, P3, and P5) were further tested. They were evaluated through scanning electron microscopy, Fourier-transform infrared spectrometry, near-infrared spectrometry, thermogravimetry, differential scanning calorimetry, and in vitro dissolution tests. The P5 formulation showed optimum pharmaco-technical properties, and it had the greatest potential to be used in oral pharmaceutical products for the controlled delivery of amiodarone.

NMR spectroscopy study of the structure of hypromellose phthalate, a component of enteric coatings of medicinal products

Scientific relevance. Hypromellose phthalate is a component of enteric coatings used to modify active substance release from oral medicinal products in the small intestine. The release rate directly depends on the non-stoichiometric composition of the polymer, first of all, on the proportion of phthalate groups in the macromolecule. It is therefore necessary to develop reliable analytical procedures for determining the structure of hypromellose phthalate to evaluate the dissolution rate of medicinal products containing the polymer.Aim. The study aimed to develop an analytical procedure for quantifying the proportion of phthalate groups in hypromellose phthalate samples using NMR spectroscopy and to determine the relationship between the polymer dissolution rate in aqueous buffer solutions and its structural features (degree of molar substitution and molecular mass).Materials and methods. The study examined hypromellose phthalate samples isolated from enteric coatings of proton-pump inhibitors and used the reference standard for hypromellose phthalate. The non-stoichiometric composition of the polymer was determined by 13C NMR spectroscopy.Results. The authors established the conditions required to separate hypromellose phthalate from the other coating components and identified the characteristic 13C NMR signals that may be used to differentiate between the structural fragments of hypromellose phthalate. The study demonstrated the relationship between the dissolution rate and the structure of the polymer. Commercial grades of hypromellose phthalate were shown to differ in composition and, as a result, in their dissolution kinetics (in particular, the threshold pH for the onset of dissolution (5.0–5.5), as well as the dissolution rates at the same pH).Conclusions. The authors developed NMR-based procedures to determine the proportion of phthalate groups on the basis of their mass fraction in a weighted hypromellose phthalate sample and the degree of molar substitution of the polymer. The results support the applicability of these analytical procedures to the characterisation of sample composition in polymer dissolution rate studies. In principle, it is possible to derive a multiple linear regression equation that describes the dissolution rate of hypromellose phthalate as a function of the molecular mass and the molar substitution with phthalate groups. Further investigation of a larger number of polymer samples with different compositions is needed to improve the regression model and demonstrate its statistical significance. In addition to the proportion of phthalate groups, the pharmacopoeial analysis of hypromellose phthalate should also control the molecular mass of the polymer.

Comparative study on estrogen receptor alpha dimerization and transcriptional activity of parabens.

Parabens are used as preservatives in various household products, including oral products, cosmetics, and hair/body washes. In recent years, the widespread use of parabens has raised concerns due to the potential health risks associated with their estrogenic effects. In the present study, we evaluated and compared the estrogenic activity of parabens using two cell-based in vitro tests: (1) bioluminescence resonance energy transfer (BRET)-based estrogen receptor alpha (ERα) dimerization using HEK293 cells that were stably transfected with ERα-fused NanoLuc luciferase (Nluc) and HaloTag (HT) expression vector, and (2) stably transfected transcriptional activation (STTA) assays using ERα-HeLa9903 cells. The following parabens were tested using the BRET-based ERα dimerization assay and showed estrogenic activity (PC20 values): methyl paraben (MP, 5.98 × 10-5M), ethyl paraben (EP, 3.29 × 10-5M), propylparaben (PP, 3.09 × 10-5M), butyl paraben (BP, 2.58 × 10-5M), isopropyl paraben (IsoPP, 1.37 × 10-5M), and isobutyl paraben (IsoBP, 1.43 × 10-5M). Except MP, all other parabens tested using the STTA assay also showed estrogenic activity: EP, 7.57 × 10-6M; PP, 1.18 × 10-6M; BP, 3.02 × 10-7M; IsoPP, 3.58 × 10-7M; and IsoBP, 1.80 × 10-7M. Overall, EP, PP, BP, IsoPP, and IsoBP tested positive for estrogenic activity using both assays. These findings demonstrate that most parabens, albeit not all, induce ERα dimerization and possess estrogenic activity.

Preferences of Patients and Providers in High-Burden Malaria Settings for Long-Acting Malaria Chemoprevention.

Antimalarial medications are recommended for chemoprevention as part of malaria control programs to decrease the morbidity and mortality related to more than 200 million infections each year. We sought to evaluate patient and provider acceptability of malaria chemoprevention in a long-acting formulation. We administered questionnaires to patients and providers in malaria endemic districts in Kenya and Zambia. Questions explored preferences and concerns around long-acting antimalarial formulations compared with oral formulations. We recruited 202 patient respondents (Kenya, n = 102; Zambia, n = 100) and 215 provider respondents (Kenya, n = 105; Zambia, n = 110). Long-acting injection was preferred to oral pills, whereas oral pills were preferred to implant or transdermal administration by patient respondents. Of 202 patient respondents, 80% indicated that they 'definitely would try' malaria chemoprevention offered by injection instead of oral pills. Of parents or guardians, 84% of 113 responded that they 'definitely would' have their child age <12 years and 90% of 88 'definitely would' have their child ≥12 years receive an injection for malaria prevention. Provider respondents indicated that they would be more likely to prescribe a long-acting injectable product compared with an oral product for malaria chemoprevention in adults (70%), adolescents ages 12 years and older (67%), and children <12 years (81%). Potential for prolonged adverse effects with long-acting products was the highest concern for patient respondents, while higher medication-related cost was cited as the most concerning barrier to implementation by providers. Overall, these findings indicate enthusiasm for the development of long-acting injectable antimalarials to provide individual delivery method options across age groups.

Developing a Modular Continuous Drug Product Manufacturing System with Real Time Quality Assurance for Producing Pharmaceutical Mini-Tablets

The pharmaceutical industry has shown keen interest in developing small-scale modular manufacturing systems for producing medicinal products. These systems offer agile and flexible manufacturing, and are well-suited for use in situations requiring rapid production of drugs such as pandemics and humanitarian disasters. The creation of such systems requires the development of modular facilities for making solid oral drug products. In recent years, however, the development of such facilities has seen limited progress. This study presents a development of a prototype modular system that uses drop on demand (DoD) printing to produce personalized solid oral drug products. The system's operation is demonstrated for manufacturing mini-tablets, a category of pediatric drug products, in continuous and semi-batch modes. In this process, the DoD printer is used to generate molten formulation drops that are solidified into mini-tablets. These dosages are then extracted, washed and dried in a continuous filtration and drying unit which is integrated with the printer. Process monitoring tools are also incorporated in the system to track the critical quality attributes of the product and the critical process parameters of the manufacturing operation in real time. Future areas of innovation are also proposed to improve this prototype unit and to enable the development of advanced drug manufacturing systems based on this platform.

Challenges in Permeability Assessment for Oral Drug Product Development.

Drug permeation across the intestinal epithelium is a prerequisite for successful oral drug delivery. The increased interest in oral administration of peptides, as well as poorly soluble and poorly permeable compounds such as drugs for targeted protein degradation, have made permeability a key parameter in oral drug product development. This review describes the various in vitro, in silico and in vivo methodologies that are applied to determine drug permeability in the human gastrointestinal tract and identifies how they are applied in the different stages of drug development. The various methods used to predict, estimate or measure permeability values, ranging from in silico and in vitro methods all the way to studies in animals and humans, are discussed with regard to their advantages, limitations and applications. A special focus is put on novel techniques such as computational approaches, gut-on-chip models and human tissue-based models, where significant progress has been made in the last few years. In addition, the impact of permeability estimations on PK predictions in PBPK modeling, the degree to which excipients can affect drug permeability in clinical studies and the requirements for colonic drug absorption are addressed.

Quantification of Drospirenone- and Ethinyl Estradiol-Related Impurities in a Combined Pharmaceutical Dosage Form by a Chromatography Method With a QbD Robustness Study.

The estimation of drugs containing drospirenone (DRSP) and ethinyl estradiol (EE), and their related impurities, in low-dose oral contraceptive drug products is an extremely challenging target. The proposed research sought to develop and validate a stability-indicating method for quantifying drug substances and their related impurities in tablet formulation. To develop and validate a simple, specific, accurate, precise, and stability-indicating reverse-phase (RP)-HPLC method for quantification of DRSP, EE, and their impurities in accordance with International Conference on Harmonisation (ICH) guidelines. The separation was achieved using an Agilent Zorbax SB C18 column (4.6 mm × 250 mm, 5 µm) with a detection wavelength of 215 nm and mobile phases A (100% acetonitrile) and B (acetonitrile-water, 1 + 3, v/v) at a flow rate of 1.3 mL/min and a column temperature of 40°C. The recovery study of each impurity was conducted in the range of 24 to 72 µg/mL for DRSP-related impurities and 0.2 to 0.6 µg/mL for EE-related impurities with respect to the specification limit. A linearity study was conducted over a range of 1.5 to 90 µg/mL for DRSP and DRSP-related impurities, and 0.125 to 0.75 µg/mL for EE-related impurities. A Quality by Design (QbD) study demonstrated the method's robustness. As per current guidelines, a stability-indicating method has been developed for the determination of impurities in DRSP/EE film-coated tablets. A QbD-based robustness test was performed and the method was found to be robust. An accurate, precise, stability-indicating, gradient RP-HPLC method has been developed and validated to determine DRSP, EE, and nine related impurities in tablet formulation. A QbD technique was used to establish a robustness study.

Compliance with oral hygiene and dietary advice for the prevention of post-radiotherapy dental disease among head and neck cancer patients – a qualitative study

ObjectivesTo elicit head and neck cancer (HANC) patients’ views about their oral health and to identify potential issues regarding compliance with clinical oral hygiene and dietary advice for the prevention of post-radiotherapy dental disease. MethodsA purposive sample of twelve HANC patients between 6- and 12-months post-radiotherapy were recruited to undergo a semi-structured interview with a qualitative researcher. A pre-piloted topic guide was used to frame each interview. Qualitative data were analysed via thematic analysis. ResultsData were categorised into four main themes – ‘How HANC patients perceive oral health’, ‘Cancer diagnosis and cancer care pathway’, ‘Impact of oncology treatment (radiotherapy, surgery, and chemotherapy)’, and ‘Post-oncology treatment recovery’, with 14 subthemes. Oral health was viewed as an important component of HANC patients’ overall physical and mental health post-treatment. Patients’ non-compliance with adequate oral hygiene practice was related to oral mucositis, a “burning” sensation associated with high fluoride toothpaste, forgotten or inconsistent clinical advice, and an inadequate supply of preventive oral hygiene products. The potentially highly cariogenic nature of prescribed nutritional supplements for patients at risk of malnutrition did not tend to be communicated to patients in advance of their prescription. ConclusionsAdequate oral health is essential for the overall physical and mental well-being of post-treatment HANC patients. Non-compliance with preventive clinical advice increases the risk of post-treatment oral health deterioration and was related to miscommunication, inadequate supplies of oral hygiene products, and treatment-related oral discomfort. Clinical significancePost-treatment HANC patients are at increased risk of dental disease. Educational and behavioural techniques should be employed to enhance patients’ compliance with clinical oral hygiene and dietary advice for the prevention of post-radiotherapy dental disease. Patients should be informed about the potentially highly cariogenic nature of nutritional supplements, and these patients should undergo frequent dental recall. Clinical advice regarding oral hygiene and dietary practices needs to be given consistently to HANC patients by different specialists of the HANC multidisciplinary team.

Antibacterial Activities of Oral Care Products Containing Natural Plant Extracts from the Thai Highlands against Staphylococcus aureus: Evaluation and Satisfaction Studies

In this research, we aimed to assess antibacterial activity and develop oral care products from three natural plant extracts from the Thai highlands. The plants, including Camellia sinensis var. assamica, Zanthozylum limonella Alston, and Acorus calamus L., were extracted using two traditional extraction techniques: maceration and hydrodistillation methods. The extracts were characterized by percentage yield, total phenolic, and total flavonoid contents. Antibacterial activity against Staphylococcus aureus, which play a role in oral health and disease, was investigated. C. sinensis var. assamica extract had the highest content of phenolic acid (38.15 ± 4.12 mg GAE/g extract) and flavonoids (44.91 ± 2.76 mg QE/g extract). Interestingly, a combination of C. sinensis with Z. limonella and A. calamus provides a greater inhibitory effect against S. aureus. Furthermore, oral care products were prepared as a natural product mixture in two preparations: (i) oral ulcers gel and (ii) oral spray. Apart from antibacterial efficiency, volunteer satisfaction after the usage of oral care products containing traditional plant extracts was investigated via organoleptic evaluation. The findings of the volunteer surveys indicated positive feedback for both oral care products with high satisfaction levels. Hence, these oral care products could potentially be natural antimicrobial agents and can be further developed and applied for oral applications in the pharmaceutical and cosmetic industries.

Dynamicity, emerging patterns, and spatiotemporal trends of scientific production on the use of activated carbon in oral health: a scientometric study

BackgroundThe use of activated carbon (AC) in oral hygiene products has gained significant interest; however, its potential benefits for oral health remain uncertain. This study aimed to conduct a scientometric analysis to examine the dynamicity, emerging patterns, and trends over time in scientific production concerning the use of AC in oral health.MethodsThe Web of Science database was searched for articles published between 2005 and 2022. Various bibliometric indicators, including the H-index, annual growth, Lotka’s law, Bradford’s law, and Sankey diagram, were used for data analysis. Overlay maps, timezone visualization, and three field plots were used to evaluate visualization patterns, time–temporal relationships, and trends. Information retrieval process was performed on March 11, 2023.ResultsThe analysis revealed that only six studies constituted the top references with the highest number of citations in recent years, with Brooks’ 2017 study demonstrating the most significant increase in citation. The dual-map overlay demonstrated a close citation relationship between cluster 4 (Molecular Biology Immunology) and the areas of Environmental, Toxicology, and Nutrition. The visualization graph of publication patterns indicated the journals that accumulated the highest number of citations during the study period.ConclusionThis scientometric study provides valuable insights into the use of AC in oral health and its impact on the field of dentistry. It determines the most productive journals, authors, and countries with the greatest influence. AC effectively removes pollutants and is gaining interest for use in dental effluent treatment. Thus, it may be a viable option for professionals.

Oral Aloe vera products may cause kidney-related AEs

Oral Aloe vera products may cause kidney-related AEs

Experience in using NFC tags and QR codes for home oral care recommendations

Relevance. The wide range of home oral care products on the dental market requires professional attention and expertise. The method and tools are necessary to create efficient patient recommendations, providing for modern digital reality.Purpose. To study the patient loyalty to receiving oral care recommendations and reveal common points of interest between dentists and patients of different age groups to optimize information delivery using NFC tags and QR codes.Material and Methods. Using the questionnaire developed by the authors, the study surveyed 106 subjects in two age groups to obtain data on patient awareness of oral hygiene. We found out patients’ preferences for receiving oral care recommendations and their loyalty to the modern technology of getting information.Results. The study revealed opposite views of different age groups in some questions, but the subjects unanimously spoke in favour of the pro-active position of a dentist regarding home oral care product choice.Conclusion. Both age groups agreed on the need to hear specific professional recommendations on oral care product purchase, up to the names of stores, which explains the need to organize and optimize the advisory activity of dental clinics. We offered our method of recommendation delivery using modern technology.

The Antibacterial Potential of Essential Oils of Oral Care Thai Herbs against Streptococcus mutans and Solobacterium moorei—In Vitro Approach

Oral malodor, often known as halitosis, is an irritating breath odor that originates in the mouth and can cause significant psychological and social distress. Chlorhexidine, a powerful antimicrobial agent effective against bacteria and fungi, has become the standard treatment for halitosis. However, it has drawbacks including altered taste perception, dry mouth, and more noticeable dental staining. The use of natural essential oils to avoid these unwanted effects has proven to be an attractive strategy. This study aims to evaluate the potential of four essential oils consisting of Ma-kwean fruit (Zanthoxylum limonella, MK), clove bud (Syzygium aromaticum, CV), star anise fruit (Illicium verum, SA) and cinnamon bark (Cinnamomum aromaticum, CM) for the purpose of combating bad breath by assessing their antibacterial efficacy against halitosis-associated bacteria (Streptococcus mutans and Solobacterium moorei). The hydro-distillation process was used to prepare the essential oils, which were obtained as yellowish to colorless liquids with yields of 6.58 ± 0.81, 12.21 ± 2.98, 4.29 ± 0.15 and 1.26 ± 0.09% for MK, CV, SA and CM, respectively. The terpenoid compounds terpinene-4-ol (47.04%), limonene (17.19%), sabinene (13.27%) and alpha-terpineol (6.05%) were found as the main components in MK essential oil, while phenylpropanoids were identified as the primary components of other essential oils, namely trans-cinnamaldehyde (83.60%), eugenol (83.59%) and anethol (90.58%) were identified as the primary components of CM, CV and SA essential oils, respectively. For the antibacterial properties, the minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) values were investigated. CM essential oil exhibited the greatest capacity to inhibit growth and eradicate S. mutans, with MIC and MBC values of 0.039%, followed by CV (MIC of 0.078% and MBC of 0.156%) and MK (MIC and MBC of 0.156%), whereas the MIC of SA was 1.250% without eradication. Both CM and CV essential oils demonstrated exceptional efficacy against S. moorei, with MIC and MBC values of 0.019% and 0.033%, respectively. Furthermore, the inhibition of S. moorei biofilm formation was investigated and we discovered that the lowest effective concentration necessary to eliminate the S. moorei biofilm was one quarter of the MIC for MK, CM and CV, while that for SA essential oil was half of the MIC. These encouraging results suggest that the incorporation of MK, CM and CV essential oils into oral care products could potentially enhance their efficacy in halitosis treatment.

Evaluation of a protocol to assess a novel artificial biofilm equivalent for dentures-A prospective clinical pilot study.

This pilot study aimed to carry out preliminary tests of the removability of an artificial biofilm equivalent (ABE) and to verify the reproducibility of the ABE testing protocol for a planned main study. There is a lack of data to develop suitable artificial biofilm substitutes, which may be helpful to perform denture hygiene education and to carry out in vitro examinations of oral hygiene products. This single-group, prospective, longitudinal, interventional pilot study was conducted in Dresden (Germany) from February until December 2020. Participants were recruited who wore fully functional upper complete dentures. Denture biofilm was grown on acrylic specimens by wearing dentures for 12 h and 36 h using intraoral appliances. Acrylic specimens were coated with ABEs of three compositions: chitosan (ChS) 0.3 g, methylcellulose (MC) 1.7 g; ChS 0.2 g, MC 1.8 g; ChS 0.1 g, MC 1.9 g (labelled 1.7MC, 1.8MC and 1.9MC, respectively). All specimens underwent standardised mechanical brushing. The percentages of remaining biofilm (POB) were measured. Thirty-one participants were prescreened, and eight (26%) were included. The appliances were well tolerated, and biofilm was collected. ABE was prepared and brushed as planned. Three and six brushing strokes were needed to remove 12-h and 36-h natural denture biofilm, respectively. Correspondingly, three brushing strokes were needed to remove 1.9MC ABE and six brushing strokes to remove 1.8MC and 1.7MC ABE. A reproducibility of ABE removal was indicated. The removability of ABE and the ABE testing protocol were feasible and reproducible for conducting the future main study.

Polyhexamethylene guanidine hydrochloride as promising active ingredient for oral antiseptic products to eliminate microorganisms threatening the health of endangered wild cats: a comparative study with chlorhexidine digluconate.

The aim of this study was to evaluate the antimicrobial efficacy of polyhexamethylene hydrochloride guanidine (PHMGH) compared to chlorhexidine digluconate (CLX) for use as an oral antiseptic during dental procedures in wild cats. This research is crucial due to limited information on the diversity of oral microorganisms in wild cats and the detrimental local and systemic effects of oral diseases, which highlights the importance of improving prevention and treatment strategies. Samples were collected from the oral cavities of four Puma concolor, one Panthera onca, and one Panthera leo, and the number of colony-forming units per milliliter (CFU/mL) was counted and semi-automatically identified. The antimicrobial susceptibility profile of bacterial isolates was determined using minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and time-kill kinetics of PHMGH and CLX. A total of 16 bacterial isolates were identified, consisting of six Gram-positive and 10 Gram-negative. PHMGH displayed MIC and MBC from 0.24 to 125.00 μg/mL, lower than those of CLX against three isolates. Time-kill kinetics showed that PHMGH reduced the microbial load by over 90% for all microorganisms within 30 min, whereas CLX did not. Only two Gram-positive isolates exposed to the polymer showed incomplete elimination after 60 min of contact. The results could aid in the development of effective prevention and treatment strategies for oral diseases in large felids. PHMGH showed promising potential at low concentrations and short contact times compared to the commercial product CLX, making it a possible active ingredient in oral antiseptic products for veterinary use in the future.

Comparison of treatment of hypokalemia with oral administration of potassium chloride vial or oral tablets

Introduction: Treatment of mild to moderate hypokalemia is a high potassium-containing diet and oral pharmaceutical potassium products. However, several medical centers in Iran use injectable dosage forms orally, which is not a confirmed method by reliable guidelines. Objectives: This study investigated the advantages and side effects of oral tablets versus injection vials of potassium chloride orally. Patients and Methods: This descriptive-analytical cross-sectional study was performed from March 2022 to June 2022. Thirty patients received tablets ("potassium chloride tablet" group), and thirty patients received injection vials ("potassium chloride vials orally" group) of potassium chloride orally. The variables, including age, gender, clinical side effects, and serum level of potassium, were regularly recorded. Results: The mean duration of serum potassium normalization was 42.00 hours for the "potassium chloride tablet" group and 84.57 hours for the "potassium chloride vials orally" group. The mean total potassium intake was 127.20 mEq/L in the "potassium chloride tablet" group and 280.03 mEq/L for the "potassium chloride vials orally" group. No significant difference was observed in gastrointestinal complications, including esophagitis, bloating, stomach ache, and nausea. None of the patients have required endoscopy due to esophagitis. Conclusion: Our result suggested that prescribing oral potassium chloride tablets has superior benefits over injection vials. However, more detailed research is needed to reveal the other aspects of this problem. Study Registration: This study was retrospectively registered in Research Registry UIN (UIN: reviewregistry1668).

STUDY OF THE COMPOSITION OF AUXILARY SUBSTANCES WHICH ARE BEEN RESPONSIBLE FOR CONDUCT OF PROLONGED (MODIFIED) ACTION OF MEDICINES

Abstract. &#x0D; Introduction. Realization of action of medicines, including prolonged and modified, depends on composition of auxiliary substances in a medicinal form.&#x0D; Aim. Study of the composition of auxilary substances which are been responsible for conduct of prolonged (modified) action of medicines.&#x0D; Methods. Content analysis, system analysis, documental analysis.&#x0D; Results. Hydrophilic and inert components are prevailing among auxiliary substances of prolonged (modified) solid oral medicinal products (SOMP) presented in the State Register of Ukraine. Hydrophobic substances and substances, soluble at the defined values of рН, are being in less. Auxiliary substances of prolonged (modified) SOMP are presented by the derivatives of Cellulose, Ethyleneglycol, Acrylic acid, Pyrrolidone, Alginic acid, inorganics and wax-like components. Gummi and hydrocarbons are also being in the composition of prolonged SOMP.&#x0D; Conclusion. The nomenclature of auxiliary substances that are in the composition of prolonged (modified) SOMP has differences. Certain ratios of auxiliary components in the composition of SOMP are providing adjusting of time of release of medicinal substance from medicinal form.&#x0D;

Evaluation of Children’s Use of Oral Health Products, Familiarity of Parents With These Products, and Their Availability

Background: In addition to mechanical methods, mouthwash, toothpaste, and fluoride gels are high-performance methods that can play an important role in reducing plaque and preventing caries in children. The purpose of this study was to determine the availability and use of oral health products related to children, and the familiarity of parents with methods to prevent decay. Methods: In this cross-sectional study, a checklist containing questions about the familiarity of parents with and the use of products related to children’s oral health was prepared and then completed by 325 parents of children aged 6 to 9 years who referred to the pediatric department dental clinics of the School of Dentistry. A dental student obtained information about the availability of products from pharmacies using a checklist. Data were analyzed with descriptive statistics and linear regression tests using SPSS 26 software. Results: This study showed that parents were relatively familiar with some health products such as dental floss and children’s toothpaste and mouthwash, but the information of parents was not enough on products such as casein phosphate, xylitol, and fluoride gel. About 40% of the pharmacies did not have finger toothbrushes or children’s toothbrush brands. One third of pharmacies did not have children’s mouthwash. No pharmacy had fluoride gel. Conclusion: This study showed that parents’ familiarity with children’s oral health products was low. Action should be taken to increase the awareness of parents. The reason for the lack of products in pharmacies should also be investigated and the existing obstacles to access them should be alleviated.

Simultaneous voltammetric determination of female hormones using different carbonaceous electrodes in a non-aqueous environment

An undemanding electroanalytical method for the simultaneous determination of estrogens, namely 17β-estradiol (E2) or synthetic 17α-ethinylestradiol (EE2), with dienogest (DGN) has been developed for the analysis of oral contraceptives and hormone replacement therapy products. This approach is based on their anodic oxidation at carbonaceous electrode materials in pure acetonitrile using square-wave voltammetry. The electrochemical behaviour of these hormones at a glassy carbon electrode (GCE) in a nonaqueous environment was investigated using cyclic voltammetry to verify their reaction mechanisms. As part of the optimisation, commercially available GCE and boron-doped diamond electrodes were found to provide similar analytical performance, characterized by a wide linear range (>100 μmolL−1) with limits of quantification approximately 1.6 μmolL−1 for each hormone. A satisfactory precision (relative standard deviation < 4%) has been achieved for a mixture of 10 μmolL−1 E2 and DGN. Finally, the developed electroanalytical method was applied to the determination of female hormones present in pharmaceutical preparations and the results acquired were comparable to those obtained by a reference method employing reversed-phase high-performance liquid chromatography coupled to a diode array detector, which confirmed the practical use of this method in routine pharmaceutical analysis.

Salting-Out-Assisted Liquid-Liquid Extraction Method for the Determination of Nicotine from Oral Traditional and Innovative Tobacco Products Using UPLC-MS/MS.

In this study, we developed and validated a novel method that allows for the extraction and quantitation of nicotine from a variety of commercially available oral tobacco products including loose and pouched traditional moist smokeless tobacco products, and oral tobacco-derived nicotine (OTDN) lozenges, gums, and pouches. The method employed an extraction technique consisting of salting-out assisted liquid-liquid extraction using sodium hydroxide and acetonitrile in conjunction with ultra-high pressure liquid chromatography coupled to mass spectrometry. Accurate quantitation was obtained using nicotine methyl-d3 isotopically labeled internal standard. Chromatographic separation of nicotine and nicotine methyl-d3 internal standard was achieved using a Waters Acquity C18 column (50 mm × 2.1 mm i.d., 2.5 μm) with 10 mM ammonium acetate buffer (pH = 10) and acetonitrile as mobile phase A and B, respectively. Using a gradient elution and a flow rate of 0.4 mL/min for 5 min runtime, nicotine eluted at 1.74 min. The method was validated according to ICH guidelines for all the sample types with an accuracy for nicotine within 89-109%. Repeatability and intermediate precision were both estimated to be ≤7% relative standard deviation (% RSD). This method is applicable for a wide range of traditional moist smokeless and OTDN tobacco products.