scholarly journals The effect of fluoridated and iodized salt consumption by schoolchildren on acid solubility of permanent teeth enamel

2016 ◽  
Vol 97 (3) ◽  
pp. 359-363
Author(s):  
R M Ahmedbeyli
Keyword(s):  
Surface Layer ◽  
Calcium Release ◽  
Phosphorus Release ◽  
Iodized Salt ◽  
Enamel Surface ◽  
Permanent Teeth ◽  
Control Group ◽  
Blue Color ◽  
Acid Solubility ◽  
Calcium And Phosphorus

Aim. To study the acid solubility of enamel based on calcium and phosphorus from the enamel surface layer to the acid biopsy and test of enamel resistance indicators in school-age children in the presence of biogeochemical fluoride and iodide deficiency, as well as the changes in these parameters amid the 3-year fluoridated and iodized salt consumption.Methods. Enamel solubility on calcium and phosphorus was evaluated based on calcium and phosphorus release from surface layer of permanent teeth enamel into acid biopsy. Test of enamel resistance was determined by V.R. Okushko method. The color intensity was assessed using standard 10-point blue color scale.Results.. The effect of 3-year consumption of fluoridated and iodized (300±50 mg/kg fluoride, 40±10 mg/kg iodide) salt on the acid solubility of permanent teeth enamel in 155 schoolchildren, born and living in conditions of biogeochemical deficiency of fluoride (fluoride content in water 0.02-0.08 mg/l) and iodide (iodide content in water 3.38±5.07 g/l) was studied. Consumption of fluoridated and iodized salt during 36 months contributed to the maximal calcium and phosphorus release from the enamel surface layer to acid biopsy during the study period. At the end of the follow-up period in the main group of schoolchildren in relation to the control group, the calcium release from the enamel surface layer to acid biopsy was higher by 131.3%, phosphorus - by 114.5%.Conclusion. The presence of fluoridated and iodized salt in the children diet leads to a decrease in the solubility of permanent teeth enamel and, consequently, to increase in resistance to acids.

Evaluation of Primary Tooth Enamel Surface Morphology and Microhardness after Nd: YAG Laser Irradiation and APF Gel Treatment—An in vitro study

2011 ◽  
Vol 35 (4) ◽  
pp. 377-382 ◽  
Author(s):  
Naveen Reddy Banda ◽  
Vanaja Reddy G ◽  
N Shashikiran
Keyword(s):  
Laser Irradiation ◽  
Tooth Enamel ◽  
Morphological Changes ◽  
Enamel Surface ◽  
Permanent Teeth ◽  
Primary Tooth ◽  
Control Group ◽  
Yag Laser ◽  
Fluoride Treatment

Objective: Laser irradiation and fluoride has been used as a preventive tool to combat dental caries in permanent teeth, but little has been done for primary teeth which are more prone to caries. The purpose of this study was to evaluate microhardness alterations in the primary tooth enamel after Nd-YAG laser irradiation alone and combined with topical fluoride treatment either before or after Nd-YAG laser irradiation.Method: Ten primary molars were sectioned and assigned randomly to: control group, Nd-YAG laser irradiation,Nd-YAG lasing before APF and APF followed by Nd-YAG lasing. The groups were evaluated for microhardness. Surface morphological changes were observed using SEM. Results: Statistical comparisons were performed. The control group's SEM showed a relatively smooth enamel surface and lasing group had fine cracks and porosities. In the lasing + fluoride group a homogenous confluent surface was seen. In the fluoride + lasing group an irregular contour with marked crack propagation was noted. There was a significant increase in the microhardness of the treatment groups. Conclusion: Nd-YAG laser irradiation and combined APF treatment of the primary tooth enamel gave morphologically hardened enamel surface which can be a protective barrier against a cariogenic attack

scholarly journals Optimizing Manufacturing and Osseointegration of Ti6Al4V Implants through Precision Casting and Calcium and Phosphorus Ion Implantation? In Vivo Results of a Large-Scale Animal Trial

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1670 ◽  
Author(s):  
Wölfle-Roos JV ◽  
Katmer Amet B ◽  
Fiedler J ◽  
Michels H ◽  
Kappelt G ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Large Scale ◽  
In Vivo Studies ◽  
Control Group ◽  
Implant Surface ◽  
Precision Casting ◽  
Pull Out ◽  
Significant Difference ◽  
Calcium And Phosphorus

Background: Uncemented implants are still associated with several major challenges, especially with regard to their manufacturing and their osseointegration. In this study, a novel manufacturing technique—an optimized form of precision casting—and a novel surface modification to promote osseointegration—calcium and phosphorus ion implantation into the implant surface—were tested in vivo. Methods: Cylindrical Ti6Al4V implants were inserted bilaterally into the tibia of 110 rats. We compared two generations of cast Ti6Al4V implants (CAST 1st GEN, n = 22, and CAST 2nd GEN, n = 22) as well as cast 2nd GEN Ti6Al4V implants with calcium (CAST + CA, n = 22) and phosphorus (CAST + P, n = 22) ion implantation to standard machined Ti6Al4V implants (control, n = 22). After 4 and 12 weeks, maximal pull-out force and bone-to-implant contact rate (BIC) were measured and compared between all five groups. Results: There was no significant difference between all five groups after 4 weeks or 12 weeks with regard to pull-out force (p > 0.05, Kruskal Wallis test). Histomorphometric analysis showed no significant difference of BIC after 4 weeks (p > 0.05, Kruskal–Wallis test), whereas there was a trend towards a higher BIC in the CAST + P group (54.8% ± 15.2%), especially compared to the control group (38.6% ± 12.8%) after 12 weeks (p = 0.053, Kruskal–Wallis test). Conclusion: In this study, we found no indication of inferiority of Ti6Al4V implants cast with the optimized centrifugal precision casting technique of the second generation compared to standard Ti6Al4V implants. As the employed manufacturing process holds considerable economic potential, mainly due to a significantly decreased material demand per implant by casting near net-shape instead of milling away most of the starting ingot, its application in manufacturing uncemented implants seems promising. However, no significant advantages of calcium or phosphorus ion implantation could be observed in this study. Due to the promising results of ion implantation in previous in vitro and in vivo studies, further in vivo studies with different ion implantation conditions should be considered.

scholarly journals Comparative evaluation of osteogenic differentiation potential of stem cells derived from dental pulp and exfoliated deciduous teeth cultured over granular hydroxyapatite based scaffold

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Manal Nabil Hagar ◽  
Farinawati Yazid ◽  
Nur Atmaliya Luchman ◽  
Shahrul Hisham Zainal Ariffin ◽  
Rohaya Megat Abdul Wahab
Keyword(s):  
Stem Cells ◽  
Osteogenic Differentiation ◽  
Dental Pulp ◽  
3D Culture ◽  
Permanent Teeth ◽  
Deciduous Teeth ◽  
Osteogenic Potential ◽  
Control Group ◽  
Rt Pcr ◽  
Differentiation Potential

Abstract Background Mesenchymal stem cells isolated from the dental pulp of primary and permanent teeth can be differentiated into different cell types including osteoblasts. This study was conducted to compare the morphology and osteogenic potential of stem cells from exfoliated deciduous teeth (SHED) and dental pulp stem cells (DPSC) in granular hydroxyapatite scaffold (gHA). Preosteoblast cells (MC3T3-E1) were used as a control group. Methodology The expression of stemness markers for DPSC and SHED was evaluated using reverse transcriptase-polymerase chain reaction (RT-PCR). Alkaline phosphatase assay was used to compare the osteoblastic differentiation of these cells (2D culture). Then, cells were seeded on the scaffold and incubated for 21 days. Morphology assessment using field emission scanning electron microscopy (FESEM) was done while osteogenic differentiation was detected using ALP assay (3D culture). Results The morphology of cells was mononucleated, fibroblast-like shaped cells with extended cytoplasmic projection. In RT-PCR study, DPSC and SHED expressed GAPDH, CD73, CD105, and CD146 while negatively expressed CD11b, CD34 and CD45. FESEM results showed that by day 21, dental stem cells have a round like morphology which is the morphology of osteoblast as compared to day 7. The osteogenic potential using ALP assay was significantly increased (p < 0.01) in SHED as compared to DPSC and MC3T3-E1 in 2D and 3D cultures. Conclusion gHA scaffold is an optimal scaffold as it induced osteogenesis in vitro. Besides, SHED had the highest osteogenic potential making them a preferred candidate for tissue engineering in comparison with DPSC.

Comparison of Dental Caries Prevalence in Patients with Cleft Lip and/or Palate and Their Sibling Controls

2009 ◽  
Vol 46 (5) ◽  
pp. 529-531 ◽  
Author(s):  
Mahmoud Al-Dajani
Keyword(s):  
Dental Caries ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Maxillofacial Surgery ◽  
Permanent Teeth ◽  
Control Group ◽  
Oral And Maxillofacial Surgery ◽  
Caries Prevalence ◽  
Dmft Index ◽  
And Control

Objective: To evaluate the prevalence of dental caries in patients with cleft lip and/or palate and their cleft-free sibling controls. Methods: The two subject groups (patient and control) comprised 106 participants. The former group consisted of 53 patients with cleft lip and/or palate, aged 12 to 29 years, who visited the Oral and Maxillofacial Surgery Hospital at Damascus University of Syria. The control group consisted of the patients’ siblings who had no clefts, and they were sex matched to the patient group. Dental caries were examined clinically and were reported using the decayed, missing, and filled permanent teeth (DMFT) index. The DMFT scores were compared between the two groups. Results: The author found an overall association of dental caries with the presence of cleft lip and/or palate (odds ratio  =  2.52; 95% confidence interval  =  1.389–4.574; p < .05). The DMFT index scores were proportionally higher in patients with cleft lip and/or palate compared with the control group (p < .001). Conclusion: Subjects with cleft lip and palate are susceptible to dental caries independently of socioeconomic status.

scholarly journals Case-control study of oral disease indexes in individuals with head and neck cancer after antineoplastic therapy

2018 ◽  
Vol 16 (3) ◽  
Author(s):  
Reyna Aguilar Quispe ◽  
Adrielle Lindolpho Cremonesi ◽  
Jeanne Kelly Gonçalves ◽  
Cassia Maria Fischer Rubira ◽  
Paulo Sérgio da Silva Santos
Keyword(s):  
Head And Neck Cancer ◽  
Head And Neck ◽  
Neck Cancer ◽  
Permanent Teeth ◽  
Control Group ◽  
Study Group ◽  
Periodontal Index ◽  
Community Periodontal Index ◽  
History Of ◽  
Antineoplastic Treatment

ABSTRACT Objective To evaluate the oral health of patients with head and neck cancer after antineoplastic treatment, and to compare them with patients with no history of cancer. Methods A total of 75 patients, divided into Study Group, composed of individuals after antineoplastic treatment (n=30), and Control Group, with individuals with no history of cancer (n=45), aged 37 to 79 years. The oral health status was evaluated through the index of decayed, missing or filled permanent teeth (DMFT), community periodontal index and evaluation of the use and need of prosthesis. All of these items were evaluated according to the criteria recommended by the World Health Organization. The statistical analysis was descriptive and used the Pearson’s χ2 test. Results The community periodontal index was higher in the Study Group when compared to the Control Group (p<0.0001). The need for an upper (p<0.001) and lower (p<0.0001) prostheses was higher in the Study Group. Also, the use of upper prosthesis was higher in the Study Group (p<0.002). The missing or filled permanent teeth index between the two groups (p>0.0506) and the use of lower prosthesis (p>0.214) did not present a relevant statistical difference. Conclusion Periodontal disease and edentulism are the most significant changes in individuals who received antineoplastic therapy for head and neck cancer as well as greater need for oral rehabilitation.

Electron Microprobe Analyses of the Remineralization of Enamel

1970 ◽  
Vol 49 (3) ◽  
pp. 621-625 ◽  
Author(s):  
Stephen H.Y. Wei
Keyword(s):  
Acetic Acid ◽  
Electron Microprobe ◽  
Potassium Acetate ◽  
Enamel Surface ◽  
Acetate Buffer ◽  
Demineralized Enamel ◽  
Calcium And Phosphorus

The electron microprobe was used to analyze the calcium and phosphorus concentrations of sound, acid-etched, and remineralized enamel. By use of a weak acetic acid-potassium acetate buffer, it was found that the demineralization probably affected only the first 10 micrometers of the enamel surface. This demineralized enamel was successfully remineralized by the use of a calcifying solution. The changes in calcium and phosphorus concentrations and the Ca/P ratios were determined.

An Absorption Assessment of Eggshell Calcium Citrate Treated by PEF in Mice

2013 ◽  
Vol 634-638 ◽  
pp. 1413-1416 ◽  
Author(s):  
Song Yi Lin ◽  
Tong Shen ◽  
Hai Qing Ye
Keyword(s):  
Acid Phosphatase ◽  
Electric Field ◽  
Calcium Absorption ◽  
Calcium Deficiency ◽  
Control Group ◽  
Tartrate Resistant Acid Phosphatase ◽  
Calcium Citrate ◽  
Male Mice ◽  
Normal Range ◽  
Calcium And Phosphorus

Eggshell calcium citrate (ESCC) prepared by pulsed electric field (PEF) may be a new calcium resource to help treat and prevent calcium deficiency. An absorption assessment of ESCC prepared by PEF was performed in male mice with apparent calcium absorption. Compared with control group, ESCC prepared by PEF at doses of 133.0 mg/(kg•d) significantly improved the alkalinity phosphatase (ALP) activity (P < 0.05) and decreased the levels of tartrate-resistant acid phosphatase (TRAP) (P < 0.05). The ratio of calcium and phosphorus were in the normal range. Therefore, ESCC prepared by PEF could promote the absorption of calcium in mice.

An in Vivo Comparison of Antimicrobial Efficacy of Sodium Hypochlorite and Biopure MTAD™ against Enterococcus Faecalis in Primary Teeth: A qPCR Study

2014 ◽  
Vol 39 (1) ◽  
pp. 30-34 ◽  
Author(s):  
SG Tulsani ◽  
N Chikkanarasaiah ◽  
S Bethur
Keyword(s):  
Root Canal ◽  
Primary Teeth ◽  
Antimicrobial Efficacy ◽  
Permanent Teeth ◽  
Control Group ◽  
Statistical Significant Difference ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Root Canal Irrigant

Objectives: Biopure MTAD™, a new root canal irrigant has shown promising results against the most common resistant microorganism, E. faecalis, in permanent teeth. However, there is lack of studies comparing its antimicrobial effectiveness with NaOCl in primary teeth. The purpose of this study was to compare the in vivo antimicrobial efficacy of NaOCl 2.5% and Biopure MTAD™ against E. faecalis in primary teeth. Study design: Forty non vital single rooted primary maxillary anterior teeth of children aged 4-8 years, were irrigated either with NaOCl 2.5% (n=15), Biopure MTAD™ (n=15) and 0.9% Saline (n=10, control group). Paper point samples were collected at baseline (S1) and after chemomechanical preparation (S2) during the pulpectomy procedure. The presence of E. faecalis in S1 & S2 was evaluated using Real time Polymerase Chain Reaction. Results: Statistical significant difference was found in the antimicrobial efficacy of NaOCl 2.5 % and BioPure MTAD™ when compared to saline (p&gt;0.05). However, no statistical significant difference was found between the efficacies of both the irrigants. Conclusions: NaOCl 2.5% and BioPure MTAD™, both irrigants are equally efficient against E. faecalis in necrotic primary anterior teeth. MTAD is a promising irrigant, however clinical studies are required to establish it as ideal root canal irrigant in clinical practice.

scholarly journals The Influence of Highly Dispersed Metal Forms on Calcium and Phosphorus Metabolism in Polygastric Animals

2022 ◽  
Author(s):  
Makaeva Ayna Maratovna ◽  
Sizova Elena Anatolevna ◽  
Atlanderova Ksenya Nikolaevna
Keyword(s):  
Feed Additives ◽  
The Body ◽  
Feed Additive ◽  
Utilization Rate ◽  
Control Group ◽  
Ruminal Fluid ◽  
Group I ◽  
Calcium And Phosphorus ◽  
Group Ii ◽  
Experimental Group

Determining which forms of mineral feed additives can increase farm animal productivity is a key area of research. This study assessed the mineral composition of ruminal fluid and the effectiveness of calcium and phosphorus used by animals after the introduction of finely dispersed particles (FDP) of SiO2 (group I) and FeCo (group II) with a hydrodynamic radius of 109.6 ± 16.6 and 265 ± 25 nm, respectively. The deposition and use of calcium and phosphorus in the body of the experimental animals exceeded the control values. In group I, 30.8% more calcium was deposited (p ≥ 0.05), and in group II, the value was 30.3% (p ≥ 0.01). In the experimental groups, the calcium utilization rate was 27.3% higher in group I (p ≥ 0.05), and 28.2% higher in group II (p ≥ 0.01) compared to in the control. Phosphorus deposition was 34% higher (p ≤ 0.01) in experimental group I and 6% higher in experimental group II, compared with the control. Group I had a high utilization rate of phosphorus from the feed (with a 29% difference compared to the control). Comparison of the experimental groups revealed that the introduction of SiO2 FDP promoted an increase in the concentration of silicon, phosphorus, and calcium in the ruminal fluid. The introduction of FeCo FDP was accompanied by a decrease in the concentration of iron and cobalt in the ruminal fluid. Thus, the use of feed additive in finely dispersed form in the diet of animals was accompanied by an increase in the use of calcium and phosphorus by the animal’s body, which is advisable when intensifying milk and meat productivity. The obtained results require further research. Keywords: finely dispersed forms of microelements, ruminants, calcium and phosphorus exchange, feeding

scholarly journals Efficacy of Laser Doppler Flowmetry, as a Diagnostic Tool in Assessing Pulp Vitality of Traumatised Teeth. A Split Mouth Clinical Study

2021 ◽  
Vol 11 (8) ◽  
pp. 801
Author(s):  
Ani Belcheva ◽  
Maria Shindova ◽  
Reem Hanna
Keyword(s):  
Laser Doppler Flowmetry ◽  
Test Group ◽  
Laser Doppler ◽  
Permanent Teeth ◽  
Control Group ◽  
Eligibility Criteria ◽  
Doppler Flowmetry ◽  
Registration Number ◽  
Pulp Vitality ◽  
And Control

Aim: This study aimed to evaluate the efficacy of laser Doppler flowmetry (LDF) in determining the changes in the pulpal blood flow (PBF) during post-traumatic period of the traumatised permanent teeth. Methods: 88 teeth of 44 patients (mean age 10.30 ± 2.38) were recruited according to the eligibility criteria and divided into two groups: test group (44 traumatised teeth) and control group (44 sound and healthy teeth). The measurement of PBF was performed, using a LDF monitor. Results: The analysis of the LDF outcomes in function of diagnosis indicated that the measurements of the traumatised teeth were significantly higher than those of non-traumatised teeth (p ˂ 0.05). Conclusions: LDF application provides dentists with fundamental benefits in terms of an early and precise investigation of PBF. In addition, LDF is a useful monitoring tool for revascularization of traumatised teeth and reliable objective diagnostic indicator of pulp vitality. Trial registration: ClinicalTrials.gov (Registration number: NCT04967456).

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