Volume Of Saliva Research Articles

The Effect of Controlled Diabetic and Non-diabetic Saliva on Candida albicans Adherence to Heat Polymerized Acrylic Resin Discs

Background: Oral candidiasis is one of the most common infections in diabetic patients that may occur due to a decrease in salivary flow rate, alterations in the salivary composition, or both. This study aimed to investigate the effect of diabetic and non-diabetic saliva on Candida albicans adherence to the acrylic resin disc specimens, regardless of saliva volume. Methods: In this case-control study, the population consisted of 26 subjects in 2 groups (13 diabetic patients and 13 non-diabetic patients). In both groups, unstimulated whole saliva was collected. It was investigated for pH, salivary flow rate, and adhesion of C. albicans to polymethylmethacrylate disc. After preparing the polymethylmethacrylate discs, the samples were stored in diabetic saliva, non-diabetic saliva, and distilled water (negative control group) for 60 minutes at 37ºC. Then they were immersed in the yeast suspensions containing C. albicans and stained with gram stain. Yeast cells were counted using a light microscope. Results: The pH of unstimulated whole saliva in diabetic patients was significantly lower than in the control group. There was no significant difference between the flow rates of saliva in the two groups. Findings indicated that the adhesion of C. albicans to resin in diabetic saliva was higher than in non-diabetic saliva. Conclusion: This study showed the same amount of salivary flow rate in diabetic and non-diabetic individuals, lower pH, and higher Candida adherence to heat polymerization acrylic resin in the diabetic group.

Saliva Secretion Is Significantly Lower in Female Patients with Mild Reflux Esophagitis than in Female Healthy Controls

Introduction: Saliva secretion is significantly lower in patients with mild reflux esophagitis than in healthy controls. A previous study on healthy controls showed that stimulated saliva secretion was lower in females than in males. Saliva secretion may be lower in female patients with mild reflux esophagitis than in male patients. Therefore, the present study investigated sex differences in saliva secretion in patients with mild reflux esophagitis. Methods: Twenty-five male patients with mild reflux esophagitis, 25 male healthy controls, 24 female patients with mild reflux esophagitis, and 24 female healthy controls were recruited for this case-control study. Saliva secretion was assessed as follows: each patient chewed sugar-free gum for 3 minutes prior to endoscopy, and the volume and pH of saliva before and after acid loading as an index of the acid-buffering capacity were measured. Results: No significant differences were observed in the amount of stimulated saliva secretion, salivary pH, or the acid-buffering capacity between male patients with mild reflux esophagitis and healthy controls. No significant differences were noted in salivary pH between female patients with mild reflux esophagitis and healthy controls; however, the amount of stimulated saliva secretion was significantly lower (p = 0.0023) in the former (2.5 [1.9–4.1]) than in the latter (4.6 [3.2–6.6]), while the acid-buffering capacity was slightly lower (p = 0.0578) in the former (5.9 [5.7–6.2]) than in the latter (6.2 [6.0–6.5]). Conclusion: The amount of stimulated saliva secretion was significantly lower in female patients with mild reflux esophagitis than in female healthy controls. This reduction in saliva secretion may affect the pathophysiology of mild reflux esophagitis in females.

Proteomic and phosphoproteomic landscape of salivary extracellular vesicles to assess OSCC therapeutical outcomes.

Circulating extracellular vesicles (EVs) have emerged as an appealing source for surrogates to evaluate the disease status. Herein, we present a novel proteomic strategy to identify proteins and phosphoproteins from salivary EVs to distinguish oral squamous cell carcinoma (OSCC) patients from healthy individuals and explore the feasibility to evaluate therapeutical outcomes. Bi-functionalized magnetic beads (BiMBs) with Ti (IV) ions and a lipid analog, 1,2-Distearoyl-3-sn-glycerophosphoethanolamine (DSPE) are developed to efficiently isolate EVs from small volume of saliva. In the discovery stage, label-free proteomics and phosphoproteomics quantification showed 315 upregulated proteins and 132 upregulated phosphoproteins in OSCC patients among more than 2500 EV proteins and 1000 EV phosphoproteins, respectively. We further applied targeted proteomics by coupling parallel reaction monitoring with parallel accumulation-serial fragmentation (prm-PASEF) to measure panels of proteins and phosphoproteins from salivary EVs collected before and after surgical resection. A panel of three total proteins and three phosphoproteins, most of which have previously been associated with OSCC and other cancer types, show sensitive response to the therapy in individual patients. Our study presents a novel strategy to the discovery of effective biomarkers for non-invasive assessment of OSCC surgical outcomes with small amount of saliva.

Imbalanced salivary electrolytes, COVID-19 severity, and dysgeusia

Early studies of patients who progressed to severe coronavirus disease 2019 (COVID-19) reported various serum electrolyte disturbances. Hyposalivation and dysgeusia are two of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection oral symptoms. This study investigated how SARS-CoV-2 infection affects saliva volume, pH, zinc, and inorganic components (sodium, potassium, calcium). The association between these salivary properties and dysgeusia was also investigated in patients with mild and severe COVID-19. Saliva volume, pH, zinc, sodium, potassium, and calcium were measured in 142 healthy persons (control) and 158 COVID-19 patients (72 mild and 86 severe). This study showed that saliva volume, pH, zinc, sodium, potassium, and calcium levels reduced dramatically during COVID-19. Likewise, these saliva characteristics were significantly lower in severe COVID-19 individuals than in mild COVID-19 cases. In addition, there was no correlation between dysgeusia and salivary composition, volume, or pH. All salivary indicators were reduced in the COVID-19 group reporting the loss of taste and smell and the group who perceived neither. These data suggested that COVID-19 is associated with many salivary abnormalities, including hyposalivation, decreased pH, and electrolyte imbalances. These were more pronounced in severe COVID-19 cases. According to the current study, saliva characteristics could be utilized for early diagnosis, quarantine, and therapy in COVID-19 patients. As a result, the virus transmission can be stopped, and the optimum therapeutic results might be obtained. COVID-19-associated dysgeusia was unrelated to the reduction of these changes.

Efficacy of sofpironium bromide gel on clozapine-induced hypersalivation in patients with treatment-resistant schizophrenia: double-blind, controlled crossover study.

Hypersalivation is a major side-effect of clozapine in patients with treatment-resistant schizophrenia. We investigated the efficacy of topical anticholinergic formulation sofpironium bromide gel for improving hypersalivation in patients with treatment-resistant schizophrenia receiving clozapine. A double-blind, controlled crossover study was conducted with sofpironium bromide gel and a placebo gel to treat clozapine-induced hypersalivation in 16 patients with treatment-resistant schizophrenia. Patients were randomly divided between groups A and B (each n = 8). Group A was treated with sofpironium bromide gel for 6 weeks, followed by a 2-week washout period and 6 weeks of placebo gel, after which they were observed for another 2 weeks. In contrast, group B was treated with placebo gel for 6 weeks, followed by a 2-week washout period, 6 weeks of sofpironium bromide gel and a 2-week observation period. One-minute saliva volume, objective salivation ratings (Drooling Severity and Frequency Scale and Nocturnal Hypersalivation Rating Scale) and subjective salivation ratings (Visual Analogue Scale) were assessed every 2 weeks. All patients completed the trials. Three patients reported mild, spontaneously resolved skin itching. Compared with baseline values, the 1-min saliva volumes of both groups were significantly decreased by approximately 30% at the second week of sofpironium bromide gel treatment (P < 0.001), and significantly decreased by >40% at the fourth and sixth weeks of treatment (P < 0.001). The effects were maintained for over 2 weeks even after the treatment was discontinued. We suggest that sofpironium bromide gel is effective in treating clozapine-induced hypersalivation in patients with treatment-resistant schizophrenia.

Relation between the risk factors for the severity of denture stomatitis and quality of life of complete edentulous individuals: a cross-sectional study.

To assess the association between risk factors for developing denture stomatitis (DS) and oral health-related quality of life (OHRQoL) in complete denture wearers. Participants of both sexes, wearing complete dentures, were classified using the modified Newton classification for the absence or the severity of DS and allocated to groups Normal or zero, IA, IB, II, and III. Lifestyle, oral and denture history, and medication use were assessed using specific questionnaires; clinical parameters such as anatomical characteristics of support were evaluated with the Kapur classification; salivary flow (SF) was calculated by the volume of unstimulated saliva per minute; and microbial load was determined by counting colony forming units (CFU) of target microorganisms present in the biofilm collected from dentures and palate. OHIP-EDENT assessed the OHRQoL. Kendall's tau_b and Spearman tests were applied with a significance level of 5%. 184 patients (143 female and 41 male) aged 65.5 ± 6.8 years were evaluated. Positive correlations were found for sex (women; p=0.013, r=0.16), individuals who started to consume alcoholic beverages as a young adult (18-27 years) (p=0.008, r=0.22), CFU of Candida spp. (p<0.001, r=0.27 denture; p<0.001, r=0.31 palate); Candida albicans (p=0.004, r=0.22 denture; p=0.003, r=0.25 palate), and Candida glabrata (p=0.004, r=0.22 denture; p=0.001, r=0.27 palate). Moreover, negative correlations with DS were found for CFU of Staphylococcus spp. (p=0.004, r=-0.20 palate) and enterobacteria (p=0.002, r=-0.24 palate), as well as a negative correlation between SF (p=0.009, r=-0.193) and DS. The CFU of Staphylococcus spp. and enterobacteria on the palate significantly correlated with OHRQoL. Being female, consuming alcoholic beverages as a young adult, CFU of Candida spp., Candida albicans, Candida glabrata, and salivary flow may be the most significant risk factors for DS. The microbial load of Staphylococcus spp. and enterobacteria seems to influence the quality of life for complete denture wearers.

Antisialogogue Effect of Atropine Sulfate at Dosages of 0.25 Mg and 0.5 Mg Under General Anesthesia with Ketamin

Introduction: Excessive saliva production can becomes an airway problem in conditions of decreased consciousness where there is impaired swallowing function. It increases the risk of aspiration of saliva into the airways that can result in choking. The use of premedication drugs to reduce the incidence of drug-induced hypersalivation can be done as a prevention. The anticholinergic drug class is the drug of choice for the management of hypersalivation in general anesthesia patients who have been given ketamine and ether. Ketamine as a sedating agent will provide a side effect of hypersalivation, where hypersalivation can cause laryngospasm or aspiration, as a form of prevention, anticholinergic drugs such as atropine can be given. The aim of this research was to compare the effect of antisialagogue on the administration of atropine sulfate at a dose of 0.25 mg and 0.5 mg in intravenous general anesthesia patients without ETT with ketamine at Haji Adam Malik General Hospital Medan and Putri Hijau Hospital Medan. Method: This study used a double blind RCT design. A total of 60 patients with intravenous general anesthesia without ETT with ketamine (1-2 mg/kg BW) were divided into 2 groups of Atropine Sulfas doses (0.25 and 0.5 mg) then the total salivary volume of each patient was measured and analyzed. Results: There was a significant difference between the treatment groups of 0.25 mg and 0.5 mg in the volume of saliva that had been collected (P-value = 0.008). Conclusion: There was a significant comparison between the use of 0.25 mg and 0.5 mg atropine in patients at Haji Adam Malik Hospital and Putri Hijau Hospital Medan.

Proton Pump Inhibitor Treatment Has Little Effects on Secretion of Saliva in Patients with Proton Pump Inhibitor-Responsive Mild Reflux Esophagitis and Non-Erosive Reflux Disease

Introduction: The secretion of saliva, which is triggered by acid reflux into the esophagus via the esophagosalivary reflex, plays a crucial role in the defensive mechanisms of the esophagus. The volume of saliva secreted in patients with gastroesophageal reflux disease (GERD) is reduced. However, the effects of proton pump inhibitors (PPI) on the secretion of saliva have rarely been reported. Therefore, the present study investigated changes in the volume and pH of saliva after the cessation of PPI. Materials and Methods: We retrospectively reviewed the records of consecutive patients previously diagnosed with mild reflux esophagitis (RE) or non-erosive reflux disease (NERD) controlled with PPI (including vonoprazan) who performed the salivary secretion test before and after a 2-week cessation of PPI. The volume, pH, and pH after acid loading (buffering capacity) of saliva were compared before and after the cessation of PPI. Results: Thirty-two patients (25 NERD, 7 mild RE) were included. The second saliva test was performed a median interval of 14 months [12.0–15.3] after the first test. No significant differences were observed in the volume of saliva secreted before and after the cessation of PPI (before 4.0 mL [2.7–6.0] vs. after 4.0 mL [2.3–5.9], p = 0.894). No significant differences were noted in pH or changes in pH after acid loading before and after the cessation of PPI (pH: before 7.1 ± 0.24 vs. after 7.0 ± 0.24, p = 0.1. Delta pH after acid loading: before 1.0 [0.8–1.2] vs. after 1.0 [0.8–1.2], p = 0.844). Conclusion: The cessation of PPI did not appear to affect the volume, pH, or buffering capacity of saliva in patients with PPI-responsive mild RE and NERD.

A Preliminary Pilot Study: Metabolomic Analysis of Saliva in Oral Candidiasis.

Early detection of oral candidiasis is essential. However, most currently available methods are time-consuming and useful only for screening patients. Previous studies on the relationship between oral candidiasis and saliva have focused on saliva volume and not on its components. Therefore, to clarify the effects of oral candidiasis on salivary metabolites, the relationship between salivary components and oral candidiasis was investigated by comparing the salivary metabolites of oral candidiasis patients and those not previously diagnosed with candidiasis. Forty-five participants visiting our university hospital were included and classified into two groups, the Candida group and the control group, based on the Candida detection test results. The unstimulated saliva was collected using the spitting method over 15 min, and the stimulated saliva was collected using the gum-chewing method over 10 min. The saliva volume was measured, and the saliva samples were frozen and analyzed metabolomically. Metabolome analysis revealed 51 metabolites with peak detection rates exceeding 50%. There was no significant difference in age and sex between the Candida and control groups. In the Candida group, five metabolites (tyrosine, choline, phosphoenolpyruvate, histidine, and 6-phosphogluconate) were significantly elevated in the unstimulated, two (octanoic acid and uridine monophosphate(UMP)) were significantly increased, and four (ornithine, butyrate, aminovalerate and aminolevulinate) were significantly decreased in the stimulated saliva. This study suggests the possibility of identifying metabolites specific to patients with oral candidiasis, which could aid prompt diagnosis.

The altered production and property of saliva induced by ingesting fermented food ingredients affect the oral microbiome composition in mice.

Oral functions are diverse and critical to human health. Therefore, insufficient secretion or poor quality of saliva, which is secreted into the oral cavity and plays various roles, could have a crucial influence on the oral microenvironment and be associated with systemic disease development. Here, we investigated the effects of food ingredients on saliva quantity and quality, including fermented ones. Through the in vitro submandibular glands' organ culture analyses, we found that "Yomo gyutto," fermented Japanese mugwort (Artemisia princeps), altered the expression of aquaporin-5, a water channel protein. We also found that Yomo gyutto increased saliva volume, along with the amount of α-amylase in mice, and caused changes in the oral microbiome composition of mice. These results suggested that by ingesting Yomo gyutto, we could directly and effectively manipulate the quantity and quality of saliva secreted from the salivary glands, potentially altering the oral microbiome composition for individual health.

Acute Effects Of Different Exercise Modes On Salivary Iga And Plasma Cortisol Secretory Responses

Salivary Immunoglobulin A (IgA) prevent bacterial attachment to the mucosal surfaces. High-intensity or long-term exercise causes a transient decrease in oral immune function through decreased salivary IgA secretion, and this response is associated with exercise-induced stress, such as cortisol. However, it is unclear whether differences in exercise modes affect salivary IgA and plasma cortisol secretory responses. PURPOSE:The purpose of this study was to examine whether differences in exercise modes affect salivary IgA and plasma cortisol secretory responses to a single bout of exercise. METHODS:Seven healthy young males with no exercise habits participated in the study. Subjects randomly performed two conditions: moderate-intensity continuous exercise (MICE) for 20 min cycle exercise at a work rate equivalent to 70% VO2max, and high-intensity interval exercise (HIIE, same total exercising volume to MICE) for 20 min cycle exercise, consisting of five 2 min bouts at 90% VO2max with 2 min active recovery at 50% VO2max. Saliva and blood samples were collected before, immediately after, 30 min after each exercise condition. The salivary IgA secretion rate was calculated from salivary IgA concentration and saliva volume per minute. RESULTS:In MICE, change in salivary IgA secretion rate at immediately after and 30 min after exercise was significantly lower than that before exercise (P < 0.05), but did not change in HIIE. In addition, the amount of change (area under the curve) in salivary IgA secretion rate in MICE was lower than that in HIIE (P < 0.05). Plasma cortisol concentration did not change in both MICE and HIIE. However, there was a significant negative correlation between salivary IgA secretion rate and plasma cortisol concentration in MICE (r = -0.544, P < 0.05). CONCLUSIONS:These results suggest that the salivary IgA secretory response may differ with different exercise modes. In MICE, the reduced salivary IgA secretory response may be associated with the increase in systemic cortisol concentration. Supported by Grants-in-Aid for Scientific Research (#19 K22828, M. Iemitsu)

Exploring salivary biomarkers and swallowing perceptions in Sjogren's syndrome: A case–control feasibility study

AbstractBackgroundThe autoimmune disease Sjogren's syndrome (SS) is often characterized by salivary changes that may affect swallowing. No known study has investigated the association between salivary biomarkers and perceptions of swallowing in individuals with SS. Our objectives were to explore: (1) the operational feasibility of investigating saliva volume and composition, along with perceptions of swallowing, in those with and without SS; and (2) the relationship between saliva composition and perceptions of oral dryness, swallowing, and quality of life.MethodsWe conducted a prospective, case–control feasibility study, collecting feasibility data (recruitment rate and optimal saliva collection methods) and whole mouth saliva samples (unstimulated and stimulated). We measured total protein content and conducted sialochemical (α‐amylase, cortisol, C‐reactive protein [CRP], and mucins), sialometric (flow rate), and perceptual (oral dryness and swallowing‐related quality of life [SWAL‐QOL]) assessments. Our exploratory analyses focused on the main and fixed effects. We summarized all data descriptively, comparing: (a) outcomes between groups (t tests or Mann–Whitney U) and (b) salivary and perceptual data across participants (partial least‐squares correlation [PLSC]).ResultsWe enrolled 12 (N) participants (6 per group), all providing analyzable saliva. Cases had lower flow rate (p = 0.003) and higher total protein, cortisol, and CRP concentrations (p &lt; 0.02) than controls. PLSC revealed inverse covariance between sialochemical and SWAL‐QOL data across participants.ConclusionOur study was feasible as designed. We explored novel relationships between salivary outcomes and participant‐reported perceptions, distinguishing individuals with and without SS. Our findings support further study of saliva's role in perceptions of swallowing, specifically analytes with lubricative properties.

Hijama (wet cupping therapy) enhances oral and dental health by improving salivary secretion volume and pH in adult patients at King Abdul Aziz University Hospital (KAUH), Jeddah, KSA: A controlled trial study

ObjectiveThe aim of this study was to explore the potential effect of Hijama in promoting oral health by analyzing its effects in modulating saliva flow and pH. MethodAn open-label, non-randomized controlled trial design was conducted at the Hijama clinic of Y.A. Jameel Scientific Chair of Prophetic Medical Applications at King Abdul Aziz University Hospital (KAUH), Jeddah, KSA. Forty-one healthy volunteers were divided into two groups: Hijama (intervention, N = 21) and control (N = 20). Saliva volume and pH were measured in salivary samples collected in a standardized fashion, 1 h before admission to the Hijama room (pre-Hijama) and 30 min after the procedure (post-Hijama) in both groups. The Hijama group underwent an additional salivary collection 7 days after Hijama. ResultEarly post-Hijama assessment showed an increase in saliva volume by an average of 1 mL in the Hijama group, whereas that in the control group decreased by 0.6 mL (p < 0.001; large effect size, Cohen's d = 1.24). Saliva pH also increased in the Hijama group by an average 0.22 but decreased by 0.08 in controls (p < 0.001; large effect size, Cohen's d = 1.22). The multivariate model demonstrated that Hijama explained 48.8% of the variability of both pH and volume together (group × time effect, eta squared = 0.488, p < 0.001), whereas time and sex had no effect. At 7 days post-Hijama, both the volume and pH of saliva had increased in the Hijama group with respect to the early post-Hijama time point; however, only the volume increase was statistically significant. ConclusionHijama enhanced salivary function and induced a significant increase in saliva volume and pH, which was maintained 7 days after the intervention. Further studies are warranted to identify other effects of Hijama on salivary glands and explore its long-term efficacy and clinical applications.

Saliva Changes in Pediatric Patients with Eating Disorders.

ObjectivesTo determine the differences between pediatric patients with eating disorders (ED) and the control group in the amount of saliva and the concentration of total amylase and electrolytes in saliva, and to evaluate the correlation between the saliva changes and nutritional status.Material and methodsThe study included 101 participants (14.34 ±1.99 years), out of which 50 participants with ED subgroups and 51 participants in the control group. Data were statistically analyzed (Mann-Whitney, Kruskal-Wallis, chi-square, Spearman rank correlation test, α=0.05).ResultsNo significant differences in salivary volume between the groups were found. A significant difference in the volume of saliva secreted in the 5th and 15th minute was found between the anorexia nervosa and bulimia nervosa subgroups. The examined anthropometric parameters were marginally or significantly positively associated with saliva volume at 5 and 15 minutes, noting a more significant correlation of the same at 15 than at 5 minutes. The patients with ED had a significantly higher concentration of inorganic phosphates in saliva while the concentrations of other electrolytes and total amylase in saliva did not differ significantly.ConclusionsNutritional status affects salivation. There is a difference in saliva volume in pediatric patients with different ED disorders. Variations in saliva electrolytes in pediatric patients with ED are possible.

Development and validation of a chewing robot for mimicking human food oral processing and producing food bolus.

More and more studies have being done on the deformation process of food and the formation of food bolus during chewing. However, it is hard to observe the food oral processing (FOP) of subjects and obtain related data directly. A bionic chewing robot based on a six-axis parallel mechanism was proposed in this paper. The robot can not only simulate the movement of the lower jaw but also set a variety of oral processing parameters, such as the number and shape of teeth, oral temperature, saliva volume, chewing cycles, speed and force. Meanwhile, dental wax and peanuts were taken as food samples, and the chewing experiments were carried out by the bionic chewing robot and subjects, respectively. The results showed that the bionic chewing robot could be used to mimic human FOP and produce food bolus. Especially when the chewing cycles met the requirement of swallowing, the median particle size of the peanut bolus and the mixing effect index of the dental wax bolus in the two different experiments were highly consistent. In addition, the robot was proved to have the same food texture detection function as the texture analyzer.

Effects of Methamphetamine Withdrawal on the Volume and pH of Stimulated Saliva.

Statement of the Problem: As a stimulant drug of the central nervous system, methamphetamine reduces salivary secretion by stimulating inhibitory α2-receptors in the sympathetic system. The acidity of this substance reduces the salivary pH and causes severe dental caries and erosion in the cervical region of teeth, appearing as "meth mouth".Purpose: This study aimed to determine the effects of methamphetamine withdrawal on the volume and pH of stimulated saliva in patients under treatment at rehabilitation centers.Materials and Method:This descriptive cross-sectional study was conducted on a total of 20 individuals at the rehabilitation centers of Gorgan, Iran. The volume and pH of stimulated saliva were measured at three intervals: before withdrawal, four days after withdrawal, and 30 days after withdrawal. Data analysis was performed using ANOVA test in SPSS.Results: The results showed a significant difference in the mean volume of saliva before and after withdrawal (p< 0.05). Thirty days after withdrawal, the mean volume of saliva was significantly different from the mean volume after four days (p< 0.05). Moreover, the mean pH of saliva after withdrawal was significantly different from the mean pH before withdrawal (p< 0.001). On the other hand, the mean salivary pH at 30 days after withdrawal was not significantly different from the mean pH on the fourth day after withdrawal (p> 0.05).Conclusion: It seems that methamphetamine withdrawal influences the volume and pH of stimulated saliva in patients under treatment at rehabilitation centers.

Introducing a Novel Biorelevant In Vitro Dissolution Method for the Assessment of Nicotine Release from Oral Tobacco-Derived Nicotine (OTDN) and Snus Products

The rate at which oral tobacco-derived nicotine (OTDN) and snus pouches release nicotine into saliva is crucial to determine product performance. As no standardized method is available for this purpose, this study sought to develop a biorelevant dissolution method that could both discriminate between different products and predict in vivo behavior. Using a μDISS Profiler™ as a surrogate for the US Pharmacopoeia standard apparatuses and a custom-made sinker, nicotine release from an OTDN pouch product (ZYN® Dry Smooth) and a snus product (General® Pouched Snus White Portion Large) was determined in biorelevant volumes (10 mL) of artificial saliva. In addition, nicotine extraction in vivo was measured for both products. Strikingly, the method showed distinct dissolution curves for OTDN and snus pouches, and the nicotine release observed in vitro did not significantly differ from the nicotine extracted in vivo. The custom-made sinker was designed to accommodate both loose and pouched oral tobacco/nicotine products, and thus the proposed in vitro dissolution method is suitable to assess nicotine release from OTDN and snus pouches. Apart from providing individual dissolution curves, the method was also able to predict in vivo nicotine extraction. Thus, this method could serve as a (biorelevant) monograph for product equivalence studies.

How is the Oral Hygiene of Elementary School Students?- Saliva pH, Saliva Volume and Saliva Viscosity

Background: Salivary pH, saliva volume, and saliva viscosity as part of the host affect the health of the oral cavity. High saliva viscosity affects the decrease in salivary flow rate which causes the accumulation of food debris which can eventually lead to plaque and tartar. Objective: This study aims to determine the effect of saliva status on the OHI-S index in elementary school children. Methods: This type of research is observational with a cross-sectional design. The study was conducted on elementary school students in four elementary schools in Sleman City, Yogyakarta, with a total sample of 100 children. The independent variable is salivary status and the dependent variable is the OHI-S index. Collecting data by examining salivary status and examining OHI-S and analyzing data using Chi-Square. Result: there is an effect between pH, volume, and viscosity of saliva on the OHI-S index in children aged 9-11 years with p&lt;0.05. Conclusion: saliva status affects the oral hygiene of elementary school students.&#x0D;

Optimisation of saliva volumes for lipidomic analysis by nanoflow ultrahigh performance liquid chromatography-tandem mass spectrometry

Saliva is a readily accessible and clinically useful biofluid that can be used to develop disease biomarkers because of a variety of biologically active molecules in it that are also found in blood. However, even though saliva sampling is simple and non-invasive, few studies have investigated the use of salivary lipids as biomarkers, and the extraction of lipids from saliva needs to be examined thoroughly. In the present study, methods (i.e., saliva sample volume, 0.1–1.0 mL) for the extraction and analysis of salivary lipids by nanoflow ultrahigh performance liquid chromatography-tandem mass spectrometry (nUHPLC-ESI-MS/MS) were evaluated according to the matrix effect, extraction recovery, and number of quantifiable lipids. A total of 780 lipids were identified in a pooled saliva sample from 20 healthy volunteers, and 372 lipids without differentiating acyl chain structures were quantified, along with comprehensive information on salivary lipid composition and individual lipid levels. Even though extraction recovery was maintained at saliva sample volumes as low as 0.2 mL, the matrix effect and limit of detection (LOD) were relatively large with 1.0 mL. Considering the matrix effect, LOD, and number of quantifiable lipids (>limit of quantitation), the minimum volume of saliva sufficient for lipidomic analysis using nUHPLC-ESI-MS/MS was determined to be 0.5 mL.

THE DIFFERENCES OF SALIVARY VOLUME, pH AND ORAL CONDITIONS BETWEEN MENOPAUSAL AND NON-MENOPAUSAL WOMEN

Background: Menopause is the permanent cessation of menstrual cycles due to the loss of ovarian activity. This phase is characterized by physiological changes, mostly influenced by the decrease of estrogen and progesterone, as well as by the aging of tissues. These changes can involve oral cavity. Postmenopausal women are prone to changes in the oral cavity such as volume, salivary pH and oral conditions such as ulceration, bleeding gums, dry mouth and caries due to hormonal changes. Purpose: This study aimed to determine the differences in volume, salivary pH and oral conditions in menopausal women and non-menopausal women. Method: This study was using an analytic comparative method. The data obtained was secondary data from the results of the Unpad Lecturer Competency Research (RKDU) by taking a convenience sampling of 27 menopausal women and using simple random sampling of 27 non-menopausal women. The volume and salivary pH were analyzed using the non-parametric Mann-Whitney test and the data on the condition of the oral cavity were analyzed using the z-parametric test with a significance level of p&lt;0.05. Results: The results showed that there were significant differences in salivary volume (p=0.0016), salivary pH (p=0.0191) and caries (p=0.0142), and there was no significant differences in ulceration conditions (p=0.5), bleeding gums (p=0.0806) and dry mouth (p= 0.2756) in menopausal women and non-menopausal women. Conclusion: There are differences in salivary volume, salivary pH and caries conditions, but there are no differences in ulceration, bleeding gums and dry mouth conditions in menopausal women and non-menopausal women. Keywords: Menopausal women, Oral changes, Saliva pH, Saliva volume