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Studies on kinetics, thermodynamics and sorption characteristics of an inorganic ion exchanger—Titanium phosphate synthetic from Abu-Tartur phosphoric acid towards Cu (II), Pb (II) and Zn (II)

A.T. Kandil¹, E.A. Abdel-Aal², M. H. Taha³and E.A. Abdel Rahman⁴

¹ Chemistry Department, Faculty of Science, Helwan University, Cairo, Egypt

² Central Metallurgical R & D Institute, P.O. Box 87 Helwan, Cairo, Egypt

³ Nuclear Materials Authority, P.O. Box 530, El Maddi, Cairo, Egypt

⁴Misr Phosphate Company, New Valley, El-Kharga Oasis, Abu-Tartur, Egypt

emadchemali@yahoo.com

Abstract: In the current study, amorphous titanium phosphate (TiP) was produced from Abu-Tartur phosphoric acid. TiP has been characterized for elemental analysis (ICP-OES), spectral analysis (FT–IR), thermal analysis (TGA and DTA), X-ray diffraction studies and SEM-EDX. Chemical resistivity of the material has been assessed in various media–acids, bases and organic solvents. The Na⁺ ion exchange capacity (IEC) has been determined. TiP was prepared as an adsorbent for heavy metals from waters. Uptake of Cu²⁺, Pb²⁺ and Zn²⁺ onto TiP was assayed by batch tests; different parameters controlled the adsorption process are discussed. The kinetic models of adsorption were analyzed by the pseudo-first order, pseudo-second order, Elovich kinetic and Morris-Weber models. The results have been indicated that the Lagergren first order kinetic model is more appropriate than the others for titanium phosphate adsorption process for Cu, Pb, and Zn metal ions. Obtained adsorption thermodynamic parameters (ΔH°.ΔS° and ΔG°) expose that Cu, Pb, and Zn metal ions adsorption to be an endothermic, physical and spontaneous process.

[A.T. Kandil, E.A. Abdel-Aal, M. H. Taha and E.A. Abdel Rahman. Studies on kinetics, thermodynamics and sorption characteristics of an inorganic ion exchanger—Titanium phosphate synthetic from Abu-Tartur phosphoric acid towards Cu (II), Pb (II) and Zn (II). J Am Sci 2017;13(10):1-19]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 1. doi:10.7537/marsjas131017.01.

Keywords: titanium phosphate, adsorption, phosphoric acid, inorganic ion exchanger, tetravalent metal acid salts, kinetics and thermodynamics of ion exchange, adsorption isotherms

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Nonlinearities in 20W50 and SAE 50 engine oils using low power visible laser beam

H. A. Sultan

Department of Physics, College of Education for Pure Sciences, University of Basrah, Basrah, Iraq.

hassabd67@yahoo.com

Abstract: Experimental and numerical studies of diffraction ring patterns generation in 20W50 and SAE50 engine oils under the irradiation with visible, 473 nm, low power continuous wave laser beam are reported. The nonlinear refractive index, n₂, for 20W50 and SAE50 are estimated to be 5.66x10^-7 and 7.36x10^-7 cm²/W due to diffraction ring patterns and 1.59x10^-9 and 2.57x10^-9 cm²/W due to closed aperture Z-scan technique respectively. Numerical results of the diffraction ring patterns are obtained based on Fresnel- Kirchhoff’s integral.

[H. A. Sultan. Nonlinearities in 20W50 and SAE 50 engine oils using low power visible laser beam. J Am Sci 2017;13(10):20-25]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 2. doi:10.7537/marsjas131017.02.

Keywords: Diffraction patterns, Z-scan technique, Nonlinear refractive index, Fresnel- Kirchhoff’s integral.

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The Protective and Therapeutic Effect of Resveratrol in Improving Renal and Hepatic Failure Induced by Aluminum Chloride in Experimental Animals

Saja Abdalrhman Al-Qhtani and Sara Khalid Farran

Department of Biochemistry, Faculty of Sciences, king Abdulaziz University Al-Faisaliah, KSA

Saja.alq94@gmail.com

Abstract: Aluminum is a toxic agent to humans and animals. It is found in the processed foods and medicines. It is added to the drinking water for purification purposes, thus increasing human exposure to this toxic metal. Resveratrol belongs to the polyphenol group, found in red grapes, peanuts and dark chocolate, has anti- oxidant and anti-inflammatory effect. This study was conducted to determine the protective and therapeutic role of resveratrol in improving renal and hepatic failure induced by aluminum chloride. The experimental rats were divided into four groups, as follows: Group 1: 1 ml Saline solution was given orally until the end of the experiment set as healthy control group. Group 2: Mice were given aluminum chloride (17 mg / kg B.W) orally daily for 45 days set as toxicity group. Group 3: Rats of this group were given resveratrol for 45 days then aluminum chloride was given for 45 days. This group set as protective effect of resveratrol. Group 4: This group was given aluminum chloride for 45 days then resveratrol was given for another 45 days as a therapeutic effect. At the end of the experiment, serum was used to perform biochemical analyses to measure liver and kidney functions. The results of this study showed a significant increase in the activity of liver enzymes, (AST, ALT, ALP) in AlCl3 induced group compared to the control group. The results illustrated a high level of urea, creatinine and uric acid was also shown in group treated with aluminum chloride compared to the healthy group. While, the results showed a significant improve in both liver and kidney function in the resveratrol treated group either as protecting or therapeutic effect. The current study provides an important insight into the use of natural products to treat and eliminate the toxicity of aluminum chloride. Where Albumin showed significant decrease in AlCl3 induced group.

[Saja Abdalrhman Al-Qhtani and Sara Khalid Farran. The Protective and Therapeutic Effect of Resveratrol in Improving Renal and Hepatic Failure Induced by Aluminum Chloride in Experimental Animals. J Am Sci 2017;13(10):26-31]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 3. doi:10.7537/marsjas131017.03.

Keywords: Aluminum chloride, resveratrol, liver function, kidney function, experimental animals.

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Association of virulent Helicobacter Pylori strain with Coronary artery disease and coronary risk factors

Elsayed A. Khalil¹, Ahmed Abdel Ghafar¹, Shreef A. Saker² and Fathallh Elssadi¹

¹Department of Internal Medicine, Faculty of Medicine, Mansoura University, Egypt

² Department of Cardiology, Faculty of Medicine, Mansoura University, Egypt

drahmedsaleh1981@gmail.com

Abstract: Background: Helicobacter Pylori (H. pylori) infection is the commonest infection in the world that has many extra gastrointestinal manifestations and probably Coronary artery disease (CAD) is one of them. The aim of this study is to investigate the relation between Helicobacter pylori infection with Coronary risk factors and CAD. Patients and methods: This prospective study enrolled 150 patients who referred to Specialized Medical Hospital, Mansoura University for coronary angiography. All patients were tested for H. pylori Stool Antigen Test and Serum Anti-CagA strain H. Pylori. According to result of coronary angiography, patients were divided into CAD + group and CAD – group. Both groups were compared as regard prevelance of H. pylori infection and CagA positive strain. Results: The study included 150 patients, 96 men and 54 women, 60%(90/150) CAD + group and 40% (60/150) CAD – group. There was no significant difference between CAD+ group and group CAD-group as regarding overall H. pylori infection when identified by stool antigen test, P value = 0.063. While, infection by CagA positive strain found to be statistically significant higher in CAD+ group compared to CAD- group, with P value = 0.012. There was a statistically significant positive association between H. pylori infection (identified by stool antigen test) and dyslipidemia, with P value < 0.05. Conclusions: Overall H. pylori infection is not independent risk factors for Coro/nary artery disease, but its pathogenic CagA strain is independent risk factors for Coronary artery disease.

[Elsayed A. Khalil, Ahmed Abdel Ghafar, Shreef A. Saker  and Fathallh Elssadi. Association of virulent Helicobacter Pylori strain with Coronary artery disease and coronary risk factors. J Am Sci 2017;13(10):32-38]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 4. doi:10.7537/marsjas131017.04.

Keywords: virulent helicobacter pylori strain, coronary artery disease, coronary risk factor

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Determination of Dickkopf-1 in serum of physically disabled Saudi girls and its correlation with BMI and bone turnover markers

¹Zahra Ali AL-Balawi, ²Hala Salim. Sonbol, ³Mohammed Saleh Aradwi

^1. Department of Biochemistry, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia.

^2. Department of Biochemistry, Faculty of Science, King Abdul Aziz University, Jeddah, Saudi Arabia.

^3. Centre of Excellence for Osteoporosis Research and Faculty of Medicine, King Abdul Aziz University, Jeddah, Saudi Arabia.

E-mail: hsunbol@kau.edu.sa

Abstract: Background: Physical disability is common in children. Dickkopf-1 (Dkk1) is a protein marker for the inhibition of bone formation. This study aimed to assess the level of Dkk1in girls with physical disability and evaluate its correlation with bone turnover markers (BTMs) and body mass index (BMI). Methods: This study included 36 physically disabled Saudi girls recruited from the Disabled Children's Association in Jeddah, Saudi Arabia. Forty healthy Saudi girls were enrolled as a control group. The serum levels of Dkk1, the correlation between serum Dkk1 with N-terminal propeptide of type I collagen (P1NP), alkaline phosphatase (ALP), and C-terminal cross-linking telopeptide of type I collagen (β-CTX), as well as body mass index (BMI) were determined. Results: Dkk1, PINP and ALP levels were significantly higher in the physically disabled girls than in the control girls. In the control girls, β-CTX were significantly higher than in the physically disabled girls. A moderately significant positive correlations between Dkk1, BMI and ALP in addition to a weak correlation with PINP in the physically disabled girls were presented, however, the Dkk1 did not correlate with β-CTX. Conclusions: The results indicated that Dkk1 might have a role in bone changes in physically disabled girls. Dkk1 may assist in the assessment of patients with aberrant bone turnover. Further studies are needed to establish the exact role in bone metabolism.

[Zahra Ali AL-Balawi,  Hala Salim. Sonbol,  Mohammed Saleh Aradwi. Determination of Dickkopf-1 in serum of physically disabled Saudi girls and its correlation with BMI and bone turnover markers. J Am Sci 2017;13(10):39-45]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 5. doi:10.7537/marsjas131017.05.

Keywords: Dickkopf-1; children disabilities; bone turnover markers; P1NP; β-CTX; BMI

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Using of molecular biology techniques compared with conventional detection methods for detection of salmonella in cattle in Egypt

Mohamed Refai¹, Mahmoud Essam Hatem¹, Mahmoud Elhariri¹, Gamal Helmy Salem², Ahmed Hassan Mohamed El-Said²

¹Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Egypt

²Department of Biotechnology, Animal Health Research Institute, Cairo, Dokki, Egypt

drahs1234@gmail.com

Abstract A total of 179 samples of fecal swabs from diarrhea suffering cattle and were randomly collected from slaughterhouses as well as dairy farms. The conventional cultural, biochemical and serological methods for detection and identification of Salmonella in fecal swabs were applied and the results were compared with those obtained by molecular screening assays using conventional PCR and Real-Time PCR techniques. The obtained results revealed that 9.1% of fecal swabs were positive for Salmonella species using conventional cultured methods while 11.8% by using conventional PCR were found to be positive for Salmonella species and 15.5% by using Real-Time PCR were found to be positive for Salmonella species. The results of the three methods were compared to each others. We conclude that the Real-Time PCR assay has highest sensitivity and specificity for detection of Salmonella species in dairy farms especially with large number of samples.

[Mohamed Refai, Mahmoud Essam Hatem, Mahmoud Elhariri, Gamal Helmy Salem, Ahmed Hassan Mohamed El-Said. Using of molecular biology techniques compared with conventional detection methods for detection of salmonella in cattle in Egypt. J Am Sci 2017;13(10):46-50]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 6. doi:10.7537/marsjas131017.06.

Key Words: Salmonella spp, PCR, Real-Time PCR, Fecal swabs

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The role of Thalamus in A sample of Egyptian Idiopathic Generalized Epilepsy: Clinical and Advanced Radiological Study

Ahmed E. Elsayed ¹, Sayed A. Alzayat², Sabry M. Fathy², Ahmed A. Nemr³ and Amgad M. Tawfik³

¹Department of Neurology, Kobry Elkoba Military Hospital, Cairo, Egypt.

²Department of neurology, Faculty of Medicine, Al Azhar University Hospital, Cairo, Egypt.

³Department of Neurology, Maadi Military Hospital, Cairo, Egypt.

drahmed 5233@gmail.com

Abstract: The determination of the role of thalamus in a sample of Egyptian IGE patient using advanced neuroradiological technique. We assess the structural integrity, volume and functions of the thalamus in patients with Idiopathic generalized epilepsy and their relation to seizure frequency and duration of epilepsy. Methods: forty IGE patients (10 with JAE, 20 with JME and 10 with GTCs), and 20 healthy matched controls were submitted manual tracing volumrtic study to bilateral thalamus in 3D MIP work station on FSPGR software for evaluation structure integrity of thalamus and to a single voxel MRS of bilateral thalamus measuring N-acetyl aspartate (NAA) and NAA/creatine (Cr).-acetyl aspartate (NAA) and NAA/creatine (Cr). And assess severity with liverpol severity scale. Results: Patients with IGE were found to reduction than controls in volumetric in bilateral thalami and individual subgroup. JAE, JME, GTCs than control group P value < 0.001 with non- significant difference in volumetry of right and left thalamus in between the IGE subgroup JAE versus JME (P value 0.153 & 0.115), JAE versus GTCS (P value 0.210 & 0.238) and JME group versus GTCS group (P value 0.989 & 0.821 no significant difference in between the IGE subgroup with negative correlation to disease duration and generalized attack per disease duration to all group and severity scale of liverpol to JME and JAE. A significant reduction of bilateral thalami NAA and NAA/Cr ratio was observed in patients with IGE P value < 0.001 with subgroup compare JME & JAE patients had statistically highly significant lower mean values of NAA ratio than GTCS. A significant correlation between the change in neurometabolites of the patient's age and the seizure duration. JME patients show significant reduction of NAA/Cr ratio in correlate with severity scale. Conclusion: IGE was associated with reduction of bilateral thalami volume implying reduced overall neuronal numbers or neuronal dysfunction supporting the hypothesis of abnormal thalamocortical circuitry as a substrate of seizure generation. Also, we speculate that greater thalamic atrophy could be consequence of duration and cumulative of seizure and that thalamic volume may have a potential role as biomarker for disease progression. NAA and NAA/Cr reduction in IGE patient with seem worsened with increasing age, duration of epilepsy and the frequent of generalized seizures. Are consistent with epilepsy related ecotoxicity as underlying mechanism. Different result in IGE sub syndrome may be due extend different specific modifying gene.

[Ahmed E. Elsayed, Sayed A. Alzayat, Sabry M. Fathy, Ahmed A. Nemr  and Amgad M. Tawfik. The role of Thalamus in A sample of Egyptian Idiopathic Generalized Epilepsy: Clinical and Advanced Radiological Study. J Am Sci 2017;13(10):51-66]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 7. doi:10.7537/marsjas131017.07.

Key words: Idiopathic generalized epilepsy, volumetric, Magnetic resonance spectroscopy, N-acetylaspartate, Thalamus, liverpolscale severity scale.

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Comparison of multifocal visual evoked potential, automated perimetry, optical coherence tomography and optic nerve MRI in assessing visual pathway in Egyptian multiple sclerosis patients

Mohamed Y. Alazazy¹, Tarik I. Menecie², Ahmed I. Aboeleinein³, Mahmoud A. Monzer², Ahmed A. Nemr¹ and Husien A. Elghrib²

¹Maadi Military Hospital, Multiple Sclerosis Unit, Cairo, Egypt

²Neurology Department, Faculty of Medicine, Al-Azhar University, Cairo, Egypt

³Kobri Alkobba Military Hospital, Ophthalmology Department, Cairo, Egypt

alazazy77@yahoo.com

Abstract: Background: Multifocal visual evoked potentials (mfVEP) measure local response amplitude and latency in the field of vision Objective: To compare the sensitivity of mfVEP, Humphrey visual field (HVF), optical coherence tomography (OCT) and MRI optic nerve in detecting visual abnormality in multiple sclerosis (MS) patients. Methods: MfVEP, HVF, OCT (retinal nerve fiber layer [RNFL]) and MRI optic nerve were performed in 25 MS-ON eyes (last optic neuritis (ON) attack ≥ 6 months prior) and 25 MS-Non-ON eyes without ON history. Criteria to define an eye as abnormal were: mfVEP ) amplitude/latency: either amplitude or latency probability plots meeting cluster criteria with 95% specificity ) amplitude or latency alone (specificity: 97% and 98%, respectively); HVF, OCT, mean deviation and RNFL thickness meeting p < 0.05, respectively. Results: MfVEP (amplitude/latency) identified more abnormality in MS-ON eyes (95%) than HVF (72%), OCT (62%), mfVEP amplitude (66%) or latency (67%) alone. 20% of MS-non-ON eyes were abnormal for both mfVEP (amplitude/latency) and HVF compared to 8% with OCT. Agreement between tests ranged from 60% to 80%. MfVEP (amplitude/latency) categorized an additional 20% of MS-ON eyes as abnormal compared to HVF and OCT combined. Conclusions: MfVEP, which detects both demyelination (increased latency) and neural degeneration (reduced amplitude) revealed more abnormality than HVF, OCT and MRI optic nerve in MS patients.

[Mohamed Y. Alazazy, Tarik I. Menecie, Ahmed I. Aboeleinein, Mahmoud A. Monzer, Ahmed A. Nemr and Husien A. Elghrib. Comparison of multifocal visual evoked potential, automated perimetry, optical coherence tomography and optic nerve MRI in assessing visual pathway in Egyptian multiple sclerosis patients. J Am Sci 2017;13(10):67-73]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 8. doi:10.7537/marsjas131017.08.

Keywords: Comparison; multifocal visual; potential; automated perimetry; optical coherence tomography; optic nerve; MRI; visual pathway; Egyptian; multiple sclerosis; patient

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Smell and taste disorders; recent management approaches

Abu Bakr Elshafey Abd Elraouf¹, Hesham Abd El-Rahman¹, Ahmed Mohammed Mohammed El Refai¹, Rashad Abd El-Nabi Mohammed Atlam²

¹Department of Otolaryngology, Benha Faculty of Medicine, Benha, Egypt.

² Free Medical Postgraduate Student, Egypt

rasatlam@gmail.com

Abstract: Olfactory or gustatory loss should be taken seriously, as it makes a person more liable to risk for toxic exposures, such as gas leaks, smoke, and rotting food, and it also decreases the enjoyment of some of life’s pleasures, such as the fragrance of flowers or the taste of good food or fine wine. In many patients, the loss follows a viral upper respiratory tract infection, and the only real treatment is psychological reassurance of the patients that the problem may resolve if the damaged sensory cells regenerate. Olfactory or gustatory loss has many other causes that require a careful investigation and appropriate treatment. This article reviews the proper steps to take when investigating and treating chemosensory difficulties.

[Abu Bakr Elshafey Abd Elraouf Hesham Abd El-Rahman  Ahmed Mohammed Mohammed El Refai, Rashad Abd El-Nabi Mohammed Atlam. Smell and taste disorders; recent management approaches. J Am Sci 2017;13(10):74-84]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 9. doi:10.7537/marsjas131017.09.

Keywords: olfaction, gustation, flavor, anosmia and dysgeusia.

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Evaluation of Different Soil Salinity Mapping Using Remote Sensing Indicators and Regression Techniques, Basrah, Iraq

Amal Muhammad Saleh

College of Agriculture / University of Baghdad

mhmmd1961@aol.com

Abstract: Soil salinity is one of the most damaging environmental problems especially in arid and semi-arid regions. Remotely sensed data with a significant correlation to ECe were considered for developing the regression models. The aim of this study was to develop statistical regression models based on remotely sensed data to predict and map spatial variation in soil salinity in Basrah area. Different spectral indices were calculated from original bands of Landsat OLI and TIRS satellite images. Statistical correlation between field measurements of Electrical Conductivity (ECe) with the salinity indices showed that the Brightness Index (BI_1) had the highest correlation with ECe (R2 = 0.95). Ordinary Cokriging geostatistical technique was applied to estimate and identify the spatial variability of ECe (the primary variable) with the soil salinity indices (the secondary variables). The results suggest that estimation can be significantly improved using Cokriging. Compared with the Ordinary Kriging results using only primary data set of ECe, Cokriging improves the estimations greatly by increasing correlation of estimated and actual ECe (R2 = 0.668). Soil salinity map generated by the Ordinary Cokriging procedure showed that strongly saline soils (>16 dS m-1) with variable spatial distribution were the dominant class over the study area. The results of these models allow to interpolate and classify salinity on a more realistic, and continuous scale.

[Amal Muhammad Saleh. Evaluation of Different Soil Salinity Mapping Using Remote Sensing Indicators and Regression Techniques, Basrah, Iraq. J Am Sci 2017;13(10):85-97]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 10. doi:10.7537/marsjas131017.10. 

Keywords: Salinity index; electrical conductivity; semivariogram; remotely sensed data; cross‐semivariogram; kriging; cokriging.

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Effect of two training units onwet dust to develop the special force and some of functional abilities of volley ball players

Suhad Qasim Saeid Al-Mosawi and Huda Badawi Shibeib

College of Physical Education for Women, Baghdad University, Iraq.

dr_suhad@yahoo.com

Abstract: The research aimed at: 1. Preparing two training units with the wet and dry dust. 2- Identifying the effect of two training units with wet and dry sand to develop the special force and some of the functional abilities for volleyball players for the pre-post-tests of the two research communities. 3-Identifying the effect of two training units with wet and dry sand to develop the special force and some of the functional abilities for volleyball players for the pre-post-tests of the two research communities. 4-The two researchers used the experimental method considered suitable for the research requirements being the suitable manner to prove its hypothesis. The research sample is represented by Al-Sinaa club players whose number (12) and the sample is divided into two experimental groups randomly included (6) players trained on the wet sand and (6) players trained on dry sands the two training units lasted for (8weeks) of three training units weekly equivalent 24 training units with observance the individual differences and the research individuals levels.

The two researchers concluded the following:-

1-     The training on the wetsands has positive effect to develop the special force and the functional abilities currently understudy.

2-     The two training units prepared by the two researchers has clear effect on development of the two groups.

3-     Performing similar researches to identify effect of wet and dry sands training to develop the basic skill of various games and their effect on the practical performance.

[Suhad Qasim Saeid Al-Mosawi and Huda Badawi Shibeib. Effect of two training units onwet dust to develop the special force and some of functional abilities of volley ball players. J Am Sci 2017;13(10):98-102]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 11. doi:10.7537/marsjas131017.11.

Keywords: Effect; training; unit; develop; functional ability; volley ball players

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Assessment of the Effect of Implant Recipient Site´s Bone Density on Initial Implant Stability in the Anterior Mandibular Region.

Yasser Araby ¹, Wael Zakaria ¹, Mohamed Ramadan ¹, Walid Samir ²

^1. Department of Prosthetic Dental Sciences, College of Dentistry, Qassim University, Saudi Arabia

². Department Oral and Maxillofacial Radiology, Beni Suef University, Egypt. & Department Oral and Maxillofacial Surgery and Diagnostic Science, Prince Sattam bin Abdul Aziz University, Saudi Arabia

dr.yasser.araby@qudent.edu.sa

Abstract: Objective: The aim of this study was to assess the correlation between the bone density of the potential implant sites and the initial implant stability in the anterior mandibular region. Subjects and Methods: A total of 54 implants were placed in the anterior mandibular region of 27 patients. The preoperative bone densities of the implant recipient sites were evaluated using Cone Beam Computed Tomography [CBCT] and the initial implant stability using Resonance Frequency Analysis [RFA] measured as implant stability quotient values [Osstell, ISQ]. Results: The mean bone density among all implant sites was 830.4± 141.1 HU (range: 546.7 to 1265.7) and the mean ISQ values was 67.9± 6.3 (range: 55 to 79). There was a statistically significant correlation between the bone density of the recipient implant sites and the ISQ values measured immediately after implant placement Conclusion: The results from this study demonstrated a significant correlation between preoperative bone densities of the implant recipient sites in the anterior mandibular region as evaluated using cone beam computed tomography and the initial implant stability measured using resonance frequency analysis.

[Araby Y, Zakaria W, Ramadan M, Samir W. Assessment of the Effect of Implant Recipient Site´s Bone Density on Initial Implant Stability in the Anterior Mandibular Region.. J Am Sci 2017;13(10):103-109]. ISSN 1545-1003 (print); ISSN 2375-7264 (online). http://www.jofamericanscience.org. 12. doi:10.7537/marsjas131017.12.

Keywords: implant stability, bone density, cone beam computed tomography, resonance frequency analysis

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