scholarly journals Correlation between pH, buffering capacity, calcium and dental caries in schoolchildren

2018 ◽  
Vol 63 (01) ◽  
pp. 63-68
Author(s):  
Efka Zabokova Bilbilova ◽  
Ana Sotirovska Ivkovska ◽  
Olivera Sarakinova ◽  
Olga Kokoceva Ivanovska ◽  
Natasha Stavreva
Keyword(s):  
Dental Caries ◽  
Free Group ◽  
Buffer Capacity ◽  
Saliva Sample ◽  
Buffering Capacity ◽  
Active Group ◽  
Ph Buffering ◽  
Ph Values ◽  
Salivary Ph ◽  
Ph Buffering Capacity

The aim of this study was to determine salivary pH, buffering capacity and calcium levels in caries-free and caries-active children. We examined 80 children of both genders, 15 years of age. Subjects were divided into four groups as follows: caries-free females, caries-active females, caries-free males, caries-active males; each group consisted of 20 subjects. The unstimulated saliva sample was collected by the spitting method and then pH, buffering capacity and calcium in saliva was measured. The results showed that mean level of buffering capacity of saliva was decreased significantly in the caries-active group as compared to caries-free group. The obtained data showed that the mean levels of pH and calcium were decreased in the caries-active group as compared to the caries-free group, but the difference was not statistically significant. The saliva with its constituents plays an important role in maintaining oral and especially dental health. Salivary pH values were found to be higher in the caries-free group. In our study, there was no significant correlation of pH values and caries activity with gender. Buffer capacity values were significantly lower in the caries-active group than in the caries-free group. There were significant differences when the groups were compared in the caries-active group where buffer capacity values were higher in boys than in girls. Calcium content of saliva was higher in the caries-free group. The results obtained in this study related to the values of the pH, buffering capacity and calcium in saliva, may serve as parameters for determining the caries risk patients, and accordingly to plan and carry appropriate caries preventive measures. Keywords: saliva, dental caries, pH, buffer capacity, calcium

scholarly journals Estimation of salivary pH, buffering capacity, flow rate, caries prevalence and oral manifestation in chronic renal failure patients undergoing dialysis

2020 ◽  
Vol 10 (2) ◽  
pp. 19-24
Author(s):  
Bidhata Ojha ◽  
Radha Baral ◽  
Dipshikha Bajracharya
Keyword(s):  
Renal Failure ◽  
Chronic Renal Failure ◽  
Flow Rate ◽  
Oral Hygiene ◽  
Buffering Capacity ◽  
Caries Prevalence ◽  
Oral Manifestation ◽  
Ph Buffering ◽  
Salivary Ph ◽  
Ph Buffering Capacity

Background: Renal failure is a process that expresses a loss of functional capacity of the nephrons, independently of its etiology. Although acute renal failure is reversible in the majority of cases, chronic renal failure presents a progressive course towards terminal renal failure. Hemodialysis is the most widely used technique leading to systemic alterations, oral complications and variations in the flow and composition of the saliva. The purpose of this study was to estimate salivary pH, buffering capacity, flow rate in chronic renal failure patients undergoing hemodialysis with its oral manifestation and caries prevalence. Methods: Saliva samples were collected from 40 patients with chronic renal failure undergoing dialysis and 40 healthy subjects after taking the informed consent. Saliva samples were then taken to the lab for processing. Salivary pH, buffering capacity and flow rate was estimated. DMFT was calculated. The statistical analysis was done using SPSS version 23. Results: A statistically significant rise in salivary pH, buffering capacity with decrease in flow rate was noted in chronic renal failure patients undergoing dialysis compared to controls. Furthermore, decrease in DMFT value was noted in CRF group despite of poor oral hygiene of the patient. We could also observe different oral manifestations in CRF group among which uremic fetor being the commonest. Conclusions: Our report suggest that saliva is noninvasive tool which act as an adjunct in diagnos­ing oral lesions and manifestations in CRF patients whose oral hygiene is often neglected with their reluctance in long term dental appointment in the middle of regular hemodialysis schedule.

Children with a Higher Activity of Carbonic Anhydrase VI in Saliva Are More Likely to Develop Dental Caries

2017 ◽  
Vol 51 (4) ◽  
pp. 394-401 ◽  
Author(s):  
Daniele de Cassia Rodrigues Picco ◽  
Lenita Marangoni Lopes ◽  
Marcelo Rocha Marques ◽  
Sergio Roberto Peres Line ◽  
Thaís Manzano Parisotto ◽  
...  
Keyword(s):  
Dental Caries ◽  
Carbonic Anhydrase ◽  
Free Group ◽  
Flow Rate ◽  
Negative Correlation ◽  
School Children ◽  
Salivary Flow ◽  
Buffering Capacity ◽  
Salivary Flow Rate ◽  
Salivary Ph

Objective: This study aimed to analyze the concentration and activity of carbonic anhydrase (CA) VI in the saliva of school children. We investigated the relationship among caries, CA VI concentration/activity, flow rate, pH, and buffering capacity. Materials and Methods: Seventy-four school children were divided into a caries-free group and a caries group. Clinical examinations were conducted by one examiner according to World Health Organization criteria + early caries lesions. Salivary flow rate, pH, and buffering capacity were analyzed. Salivary CA VI concentration and activity were evaluated by ELISA and zymography, respectively. The data were analyzed using Student's t test and the Mann-Whitney test, and Pearson and Spearman correlation analyses were also done. In multivariate modeling, associations between variables were expressed as odds ratios. Results: The results showed that salivary flow rate, salivary pH, and BC were significantly higher in the saliva of caries-free children. Also, the salivary CA VI concentration was significantly higher in the saliva of caries-free children. The salivary CA VI activity was higher in children with caries. We found a negative correlation between BC and dental caries. Also, in the caries group we found a positive correlation between the concentration and the activity of CA VI and a negative correlation between BC and CA VI activity. A negative correlation between salivary pH and CA VI concentration was observed in the caries-free group. A high activity of CA and a low salivary flow rate were associated with dental caries. Conclusion: These results support the conclusion that dental caries is highly affected by the activity of CA VI in saliva as well as by the salivary flow rate.

Relation of Salivary Risk Factors to Dental Caries in Children with Cerebral Palsy

2010 ◽  
Vol 34 (4) ◽  
pp. 355-360 ◽  
Author(s):  
Priya Subramaniam ◽  
KL Girish Babu ◽  
Anil Rodriguez
Keyword(s):  
Risk Factors ◽  
Cerebral Palsy ◽  
Dental Caries ◽  
Flow Rate ◽  
Salivary Flow ◽  
Buffering Capacity ◽  
Ph Buffering ◽  
Salivary Ph ◽  
The Mean

One of the primary handicapping conditions of childhood is cerebral palsy (CP). Controversy exists about the incidence of dental caries and its associated salivary risk factors in cerebral palsied children. Thus the present study evaluated the correlation between dental caries and certain salivary risk factors in these children. One hundred non-institutionalized children in the age group of 5-12 years having cerebral palsy were selected. The W.H.O. criteria was used for diagnosis and recording of dental caries. Determination of the unstimulated salivary pH, buffering capacity and flow rate of stimulated saliva was carried out. The mean deft and DMFT values were 2.51 and 0.73, respectively. Salivary pH was 6.83, buffering capacity 10.84 and salivary flow rate 1.08ml/per min. A significant correlation was observed only between salivary pH and dental caries in the primary dentition of CP children.

Mapping Soil pH Buffering Capacity of Selected Fields in the Coastal Plain

2004 ◽  
Vol 68 (2) ◽  
pp. 662-668 ◽  
Author(s):  
A. R. Weaver ◽  
D. E. Kissel ◽  
F. Chen ◽  
L. T. West ◽  
W. Adkins ◽  
...  
Keyword(s):  
Soil Ph ◽  
Coastal Plain ◽  
Buffering Capacity ◽  
Ph Buffering ◽  
Ph Buffering Capacity

scholarly journals Effects of Refining Parameters on the Properties of Oil Palm Frond (OPF) Fiber for Medium Density Fibreboard (MDF)

2021 ◽  
Vol 87 (3) ◽  
pp. 64-77
Author(s):  
Zawawi Ibrahim ◽  
Aisyah Humaira Alias ◽  
Ridzuan Ramli ◽  
Noorshamsiana Abdul Wahab ◽  
Mansur Ahmad ◽  
...  
Keyword(s):  
Oil Palm ◽  
Bonding Strength ◽  
Medium Density Fiberboard ◽  
Steam Pressure ◽  
Buffering Capacity ◽  
Medium Density ◽  
Ph Buffering ◽  
Oil Palm Frond ◽  
Palm Frond ◽  
Ph Buffering Capacity

Studies on the manufacture of medium density fiberboard (MDF) from oil palm frond (OPF) fibre were conducted to provide a sustainable and feasible source of lignocellulosic materials. The quality and properties of the fibre are very important as it dictates the final MDF properties. The properties of fibre like fibre pH, buffering capacity, and morphology can influence most of the MDF performances. Refining condition is one of the most important factors which determine the properties of the refined fibre. In this study, the effects of different refining pressures and temperatures on OPF fibre were evaluated. The refining of OPF fibre was observed at four levels of refining parameters; which were categorized as low (2 bar at 130 °C), medium (4 bar at 150 °C), high (6 bar at 170 °C), and severe (8 bar at 190 °C). The refining heating time of 5 minutes was employed. The pH, buffering capacity, morphology, and the surface of the fibres were evaluated. The refined fibres were used to manufacture fibreboard panels at a target density of 720 kg/m3 and 12% urea formaldehyde (UF) resin. The panel's physical (thickness swelling) and mechanical properties (bending and internal bonding strength) were then evaluated according to European Standard (EN 622-5, 2006). The results indicated that refining conditions affected the properties of the fibres and final boards. High steam pressure and temperature-induced pH changes in OPF fibres, leading to more acidic fibres and greater acid buffering capacity. The fibre separation was more adequate at this level and produced fibre with a smooth surface. Based on the test results for fibreboard properties, high steam pressure and temperature produced better dimensional stability of panels and bending and bonding strength. However, at the highest refining condition (severe level), the board performances began to deteriorate. The best performances of the samples were found for the panels made under refining conditions of 6 bar at 170 °C.

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