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Quick KK, Danciu TE, Ramaswamy V, Dehghan M, Haley CM, Godley LW, Snay S, Horvath Z. Oral health educators' reflections on teaching 2022 and beyond. J Dent Educ 2024. [PMID: 38558033 DOI: 10.1002/jdd.13534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 02/29/2024] [Accepted: 03/14/2024] [Indexed: 04/04/2024]
Abstract
INTRODUCTION The global pandemic prompted changes in health science education affecting both teaching and learning. This multi-institutional study assesses the near-term implications of these changes on faculty and faculty development. The project goals were to: (1) describe faculty experiences of teaching during the pandemic; (2) identify ways to sustain new pedagogical approaches, (3) describe the types of support faculty members need, and (4) offer recommendations to enhance oral health professions education. METHODS A mixed-method approach using exploratory sequential design was conducted in two phases collecting qualitative and quantitative data. Focus group participants included didactic, pre-clinical, and clinical faculty in dental school (DMD/DDS), dental hygiene and dental therapy programs, and also faculty members serving in administrative roles in these programs (N = 37). One hundred forty-four faculty participated in the multi-institutional follow-up survey. RESULTS Focus group and survey results led to 14 recommendations (nine structural and five individual) for oral health profession institutions and educators. CONCLUSION Oral health profession education faculty were dramatically impacted by the pandemic and new faculty development needs were identified. Traditional faculty development topics and practices may be no longer applicable in the post-COVID-19 environment. Additionally, the pandemic stimulated creative approaches for curriculum design, teaching, and assessment in oral health profession education. Strategies need to be implemented to sustain these innovations.
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Affiliation(s)
- Karin K Quick
- Department of Primary Dental Care, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Theodora E Danciu
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Vidya Ramaswamy
- Department of Curriculum Evaluation and Promotion of Teaching and Learning, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Mojdeh Dehghan
- Department of General Dentistry, College of Dentistry, University of Tennessee Health Sciences Center, Memphis, Tennessee, USA
| | - Colin M Haley
- Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Lance W Godley
- Department of Restorative Clinical Sciences, University of Missouri-Kansas City School of Dentistry, Kansas City, Missouri, USA
| | - Sarah Snay
- Program Evaluation Group, University of Michigan, Ann Arbor, Michigan, USA
| | - Zsuzsa Horvath
- Department of Dental Public Health, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Dehghan M, Tantbirojn D, Harrison J, Stewart CW, Johnson N, Tolley EA, Zhang YH. Oral Health and Behavior Patterns of Women with Eating Disorders-A Clinical Pilot Study. Life (Basel) 2023; 13:2297. [PMID: 38137898 PMCID: PMC10744595 DOI: 10.3390/life13122297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
BACKGROUND Chronic stomach regurgitation associated with eating disorders (EDs) poses a high risk for tooth erosion. This study investigated oral health conditions, behavioral patterns, and tooth erosion in women with EDs. METHODS 16 ED and 13 healthy women were enrolled; 14 ED and 10 healthy control subjects completed the study. Subjects completed demographic, medical, oral, and behavioral health history questionnaires. Dental caries status was recorded as Decayed, Missing and Filled Teeth (DMFT)index and the severity of tooth erosion as Basic Erosive Wear Examination (BEWE) scores. Saliva was collected for flow rate, pH, and buffering capacity analysis. RESULTS The ED group had a lower stimulated saliva flow rate and higher DMFT index but no significant difference in BEWE scores compared to the controls (t-test, significance level 0.05). Five of the fourteen ED subjects exhibited extensive tooth erosion, which may have been exacerbated by their tooth-brushing behavior. CONCLUSIONS Although some ED subjects showed extensive tooth erosion in this pilot study, the average BEWE score of the ED group was not significantly different from the controls. Extensive tooth erosion in ED may relate to the low stimulated salivary flow. A larger-scale clinical study is necessary to validate these results.
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Affiliation(s)
- Mojdeh Dehghan
- College of Dentistry, University of Tennessee Health Science Center, 875 Union Avenue, Memphis, TN 38163, USA
| | - Daranee Tantbirojn
- Department of General Dentistry, College of Dentistry, University of Tennessee Health Science Center, 875 Union Avenue, Memphis, TN 38163, USA
| | - Janet Harrison
- Department of General Dentistry, College of Dentistry, University of Tennessee Health Science Center, 875 Union Avenue, Memphis, TN 38163, USA
| | - Colette W. Stewart
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, 875 Union Avenue, Memphis, TN 38163, USA
| | - Nancy Johnson
- Transformation Center, 1088 Rogers Road, Cordova, TN 38018, USA
| | - Elizabeth A. Tolley
- Department of Preventive Medicine, College of Medicine, University of Tennessee Health Science Center, 66 N Pauline, Memphis, TN 38163, USA
| | - Yanhui H. Zhang
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, 875 Union Avenue, Memphis, TN 38163, USA
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Pierce S, Amini A, Tantbirojn D, Versluis A, Dehghan M, Almoazen H. Millennial drinks: acidity, fluoride content, and enamel softening. Gen Dent 2023; 71:36-43. [PMID: 37358581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
This in vitro study aimed to evaluate the acidity and fluoride content of beverages commonly consumed by millennials and the enamel-softening effect of these drinks on tooth enamel. The study included 13 beverages in 4 categories: energy (sports) drink, flavored sparkling water, kombucha, and other (an unsweetened iced tea, a vegetable-fruit juice blend, and a soft drink). The acidity was measured with a pH/ion meter, and the fluoride concentration was measured with a combined fluoride electrode coupled to the meter (n = 10 measurements per beverage). The Vickers hardness number of extracted molars was measured before and after a 30-minute immersion in 4 representative beverages via 2 immersion protocols (n = 10 per beverage per protocol): (1) immersion in the beverage only and (2) immersion alternating between the beverage and artificial saliva every other minute. The pH and fluoride concentrations of the beverages ranged from 2.652 to 4.242 and from 0.0033 to 0.6045 ppm, respectively. One-way analysis of variance (ANOVA) revealed that all differences between beverages in pH values were statistically significant, as were the majority of differences in fluoride concentrations (P < 0.001). The beverages and the 2 immersion methods significantly affected enamel softening (2-way ANOVA, P = 0.0001 to 0.033). The representative energy drink (pH 2.990; 0.0102 ppm fluoride) caused the greatest enamel softening followed by the representative kombucha (pH 2.820; 0.2036 ppm fluoride). The representative flavored sparkling water (pH 4.066; 0.0098 ppm fluoride) caused significantly less enamel softening than the energy drink and kombucha. A root beer (pH 4.185; 0.6045 ppm fluoride) had the least enamel softening effect. All tested beverages were acidic and had a pH below 4.5; only some contained fluoride. Flavored sparkling water, likely due to its higher pH, caused less enamel softening than the tested energy drink and kombucha. The fluoride content of kombucha and root beer lower their enamel-softening effects. It is imperative that consumers be aware of the erosive potential of beverages they consume.
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Quick KK, Horvath Z, Danciu TE, Dehghan M, Godley LW, Kabani FA. Scenario I: Opportunity lost. J Dent Educ 2021; 86:352-355. [PMID: 34888868 DOI: 10.1002/jdd.12839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/21/2021] [Accepted: 10/31/2021] [Indexed: 11/10/2022]
Affiliation(s)
- Karin K Quick
- Division of Dental Public Health, Global Programs, University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - Zsuzsa Horvath
- Department of Dental Public Health, Office of Academic Career Advancement, University of Pittsburgh School of Dental Medicine, Pittsburgh, Pennsylvania, USA
| | - Theodora E Danciu
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Mojdeh Dehghan
- Department of General Dentistry, University of Tennessee Health Science Center College of Dentistry, Memphis, Tennessee, USA
| | - Lance W Godley
- Restorative Clinical Sciences Department and the Director of the Somers Clinic, Clinical Operations at the University of Missouri-Kansas City School of Dentistry, Kansas City, Kansas, USA
| | - Faizan A Kabani
- Diversity and Faculty Development, Office of Academic Affairs, Texas A&M College of Dentistry, Dallas, Texas, USA
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Rezagholivand A, Nikkhah A, Khabbazan M, Mokhtarzadeh S, Dehghan M, Mokhtabad Y, Sadighi F, Safari F, Rajaee A. Feedlot performance, carcass characteristics and economic profits in four Holstein-beef crosses compared with pure-bred Holstein cattle. Livest Sci 2021. [DOI: 10.1016/j.livsci.2020.104358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Regelson S, Dehghan M, Tantbirojn D, Almoazen H. Evaluation of fluoride levels in commercially available tea in the United States. Gen Dent 2021; 69:17-20. [PMID: 33350950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The objective of this study was to compare fluoride levels in commercially available black tea, green tea, and matcha tea. Tea samples were purchased from a local supermarket in the United States and prepared according to the manufacturer's directions to mimic consumer activity. The selected products included 3 black teas (Bigelow Earl Grey, Twinings of London Lady Grey, and Lipton), 2 green teas (Bigelow and Lipton), and 3 matcha teas (Mighty Leaf, Celestial Seasonings, and Matcha Love). For all products except Mighty Leaf and Matcha Love, 250 mL of deionized water (DIW) was heated to boiling. One tea bag was added and stirred for 2 minutes. For Mighty Leaf matcha, 300 mL of DIW was used, but the sample was otherwise prepared as previously described. Matcha Love was prepared by stirring 0.5 tsp of green tea powder for 2 minutes in 30 mL of DIW heated to boiling. A 10-mL aliquot was taken from each tea group and from DIW alone (control) and combined with 10 mL of total ionic strength adjustment buffer (TISAB II) before it was measured with a combination fluoride electrode and pH/ion meter. The sample size was 5 separately prepared and independently measured tea servings per group. Fluoride concentrations were calculated from a calibration curve constructed from appropriate fluoride standards and then statistically analyzed using analysis of variance followed by the Student-Newman-Keuls post hoc test (α = 0.05). The DIW control group had negligible fluoride content. All tested tea samples contained fluoride in amounts ranging from 0.521 to 6.082 mg/L. The mean concentration differed significantly among brands and types of tea. Matcha green tea powder had the highest concentration of fluoride. Most teas contain a higher fluoride concentration than optimally fluoridated water (0.7 mg/L). Dental healthcare professionals should consider this information when advising caries prevention regimens for patients and determining the potential for dental or skeletal fluorosis in at-risk patients.
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Dehghan M, Behjat A. Deposition of zinc oxide as an electron transport layer in planar perovskite solar cells by spray and SILAR methods comparable with spin coating. RSC Adv 2019; 9:20917-20924. [PMID: 35515519 PMCID: PMC9065750 DOI: 10.1039/c9ra01839e] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 06/24/2019] [Indexed: 01/16/2023] Open
Abstract
CH3NH3PbI3 planar-structure perovskite solar cells were fabricated with the configuration FTO/ZnO/CH3NH3PbI3/Au. ZnO nanoparticles were synthesized by the precipitation method. Three different deposition methods including spin-coating, spraying and successive ionic layer adsorption and reaction (SILAR) were applied to fabricate the ZnO films as electron transport layers. Certain analyses, such as XRD, SEM, FESEM, UV-visible and I–V measurements, were carried out to evaluate the performance of the cells. The best cell performance was achieved for the perovskite solar cell with a ZnO film coated by the spin method. The average efficiency was 7% without using any hole transport materials and 10.25% using spiro-OMeTAD as a hole transport material. The average efficiencies of the cells coated by the spraying and SILAR methods using spiro-OMeTAD, were found to be 8.64% and 7.7% respectively. This study demonstrates the versatility of the spray and SILAR coating methods and their potential for fabricating low-cost, large scale, flexible and mass produced perovskite solar cells. We have examined the versatility of spray and SILAR coating methods in fabricating mass produced low cost efficient planar perovskite solar cells.![]()
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Affiliation(s)
- M. Dehghan
- Photonics Research Group
- Engineering Research Centre
- Yazd University
- Yazd
- Iran
| | - A. Behjat
- Photonics Research Group
- Engineering Research Centre
- Yazd University
- Yazd
- Iran
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Dehghan M, Vieira Ozorio JE, Chanin S, Tantbirojn D, Versluis A, Garcia-Godoy F. Protocol for measurement of enamel loss from brushing with an anti-erosive toothpaste after an acidic episode. Gen Dent 2017; 65:63-68. [PMID: 28682285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Tooth erosion from an acidic insult may be exacerbated by toothbrushing. The purposes of this study were to develop an in vitro methodology to measure enamel loss after brushing immediately following an acidic episode and to investigate the effect of brushing with an anti-erosive toothpaste. The null hypotheses tested were that tooth erosion after brushing with the toothpaste would not be different from brushing with water and that a 1-hour delay before brushing would not reduce tooth erosion. Forty bovine enamel slabs were embedded, polished, and subjected to baseline profilometry. Specimens were bathed in hydrochloric acid for 10 minutes to simulate stomach acid exposure before post-acid profilometry. Toothbrushing was then simulated with a cross-brushing machine and followed by postbrushing profilometry. Group 1 was brushed with water; group 2 was brushed with a 50:50 toothpaste-water slurry; and groups 3 and 4 were immersed in artificial saliva for 1 hour before brushing with water or the toothpaste slurry, respectively. The depth of enamel loss was analyzed and compared using 1-way analysis of variance and post hoc testing (α = 0.05). Greater enamel loss was measured in groups brushed with toothpaste than in groups brushed with water. One-hour immersion in artificial saliva significantly reduced enamel loss when teeth were brushed with water (group 3; P < 0.05) but not with toothpaste (group 4). This study established a protocol for measuring enamel loss resulting from erosion followed by toothbrush abrasion. The results confirmed the abrasive action of toothpaste on acid-softened enamel.
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Dehghan M, Davoodnia A, Bozorgmehr MR, Bamoharram FF. Evaluation of catalytic activity of two newly prepared functionalized sulfonic acids ionic liquids in the synthesis of carbamatoalkyl naphthols under mild conditions. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363217020268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Gheisari S, Meybodi MR, Dehghan M, Ebadzadeh MM. BNC-VLA: bayesian network structure learning using a team of variable-action set learning automata. APPL INTELL 2016. [DOI: 10.1007/s10489-015-0743-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Dehghan M, Anand S, Mente A, Yusuf S. OC06_01 Association of Nutrients With Blood Lipids in 19 Countries and 5 Continents: The Pure Study. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Dehghan M, Tantbirojn D, Kymer-Davis E, Stewart CW, Zhang YH, Versluis A, Garcia-Godoy F. Neutralizing salivary pH by mouthwashes after an acidic challenge. ACTA ACUST UNITED AC 2015; 8. [DOI: 10.1111/jicd.12198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 10/03/2015] [Indexed: 01/30/2023]
Affiliation(s)
- Mojdeh Dehghan
- Department of Restorative Dentistry; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
| | - Daranee Tantbirojn
- Department of Restorative Dentistry; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
| | - Emily Kymer-Davis
- Summer Research Program; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
| | - Colette W. Stewart
- Department of Bioscience Research; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
| | - Yanhui H Zhang
- Department of Bioscience Research; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
| | - Antheunis Versluis
- Department of Bioscience Research; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
| | - Franklin Garcia-Godoy
- Department of Bioscience Research; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
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Dehghan M, Harrison J, Langham S, Scarbecz M, Amini M. Comparing comprehensive care and departmental clinical education models: students' perceptions at the University of Tennessee College of Dentistry. J Dent Educ 2015; 79:133-139. [PMID: 25640617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In summer 2012, the University of Tennessee Health Science Center College of Dentistry transitioned from a departmental clinical education model to a comprehensive care/group leader model. The aim of this study was to investigate the perspectives of the fourth-year class of dental students who, because the transition took place during their training, had experienced treating patients under both educational models. To achieve this objective, a questionnaire was designed to assess the students' opinions on the efficiency of their effort, availability of specialty faculty, stress, collaboration with classmates, and availability of exposure to different practice styles and techniques under the two systems. The students were also given an opportunity to provide open-ended feedback on the shortcomings and advantages of the systems. The Class of 2013 had 81 students, 55 of whom participated in the survey for a response rate of 67.9%. The majority (86%) of the respondents preferred the comprehensive care model and reported feeling that, in it, they were able to accomplish more comprehensive dentistry with greater consistency of supervision from faculty in a more patient-centered environment than in the departmental model. However, 56 percent considered having the same group leader for two years a disadvantage and recommended rotation of at least one group leader every six months. The results of this survey can help this college and other dental schools that are seeking to optimize their educational model to best serve students' educational experience and the dental needs of their patient population.
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Affiliation(s)
- Mojdeh Dehghan
- Dr. Dehghan is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Harrison is Professor and Chair, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Langham is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Scarbecz is Professor, Department of Bioscience Research, and Assistant Dean for Institutional Affairs, University of Tennessee Health Science Center College of Dentistry; and Dr. Amini is Professor, Supply Chain Management, Department of Marketing and Supply Chain Management, The University of Memphis.
| | - Janet Harrison
- Dr. Dehghan is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Harrison is Professor and Chair, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Langham is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Scarbecz is Professor, Department of Bioscience Research, and Assistant Dean for Institutional Affairs, University of Tennessee Health Science Center College of Dentistry; and Dr. Amini is Professor, Supply Chain Management, Department of Marketing and Supply Chain Management, The University of Memphis
| | - Sue Langham
- Dr. Dehghan is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Harrison is Professor and Chair, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Langham is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Scarbecz is Professor, Department of Bioscience Research, and Assistant Dean for Institutional Affairs, University of Tennessee Health Science Center College of Dentistry; and Dr. Amini is Professor, Supply Chain Management, Department of Marketing and Supply Chain Management, The University of Memphis
| | - Mark Scarbecz
- Dr. Dehghan is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Harrison is Professor and Chair, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Langham is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Scarbecz is Professor, Department of Bioscience Research, and Assistant Dean for Institutional Affairs, University of Tennessee Health Science Center College of Dentistry; and Dr. Amini is Professor, Supply Chain Management, Department of Marketing and Supply Chain Management, The University of Memphis
| | - Mehdi Amini
- Dr. Dehghan is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Harrison is Professor and Chair, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Langham is Assistant Professor, Department of Restorative Dentistry, University of Tennessee Health Science Center College of Dentistry; Dr. Scarbecz is Professor, Department of Bioscience Research, and Assistant Dean for Institutional Affairs, University of Tennessee Health Science Center College of Dentistry; and Dr. Amini is Professor, Supply Chain Management, Department of Marketing and Supply Chain Management, The University of Memphis
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Dehghan M, Harrison J, Langham S, Scarbecz M, Amini M. Comparing Comprehensive Care and Departmental Clinical Education Models: Students’ Perceptions at the University of Tennessee College of Dentistry. J Dent Educ 2015. [DOI: 10.1002/j.0022-0337.2015.79.2.tb05867.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mojdeh Dehghan
- Department of Restorative Dentistry; University of Tennessee Health Science Center College of Dentistry
| | - Janet Harrison
- Department of Restorative Dentistry; University of Tennessee Health Science Center College of Dentistry
| | - Sue Langham
- Department of Restorative Dentistry; University of Tennessee Health Science Center College of Dentistry
| | - Mark Scarbecz
- Department of Bioscience Research; University of Tennessee Health Science Center College of Dentistry
| | - Mehdi Amini
- Supply Chain Management; Department of Marketing and Supply Chain Management; The University of Memphis
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Dehghan M, Kashaninia Z, Sajedi F, Soltani P. Effect of Kangaroo Mother Care on the Self-esteem of Mothers of Preterm Infants Hospitalized in the Neonatal Intensive Care Unit. JCCNC 2015. [DOI: 10.15412/j.jccnc.04010402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Harrison JL, Simon JF, Dehghan M. Technological Innovations in the Restorative Department at the University of Tennessee College of Dentistry. J Tenn Dent Assoc 2015; 95:30-33. [PMID: 27008767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The UT College of Dentistry has been one of the leaders in the introduction of the CAD/CAM delivery of dentistry to the dental students. The integration of technology into a dental school curriculum requires a change in thinking and a modification of the curriculum in order to introduce it to the present day students This article updates the integration of the CEREC system into the UT Dental School curriculum, discussing the changes in equipment and teaching techniques since the last article in 2012.
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Benvidi A, Ghanbarzadeh M, Dehghan M, Mazloum-Ardakani M, Vafazadeh R. Thiocyanate ion selective electrode based on bis(N-3-methylphenyl salicylidenaminato)copper(II) ionophore. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Dehghan M, Stanley PJ, Tantbirojn D, Versluis A. Investigation of treatment options to minimize the effects of acid erosion on enamel. Gen Dent 2014; 62:e30-e33. [PMID: 24983182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This in vitro study investigated 4 products (containing calcium, phosphate, and/or fluoride) and their ability to reharden enamel softened by hydrochloric acid as compared to hardening with saliva alone. Extracted human molars were embedded and polished, and baseline Vickers hardness (VH) of enamel was measured. Statistical analysis was performed with ANOVA followed by Student-Newman-Keuls post hoc tests (P = 0.05). For all groups, VH decreased significantly after immersion in hydrochloric acid. Fluoride in combination with casein phosphopeptide amorphous calcium phosphate was the most effective treatment for enamel hardness recovery.
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Dehghan M, Ilow R, Zatonska K, Szuba A, Zhang X, Mente A, Regulska-Ilow B. Development, reproducibility and validity of the food frequency questionnaire in the Poland arm of the Prospective Urban and Rural Epidemiological (PURE) study. J Hum Nutr Diet 2012; 25:225-32. [DOI: 10.1111/j.1365-277x.2012.01240.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dehghan M. P-570 - Oxidative stress in epileptic patients in two entirely different geographical regions of Iran, Ardabli & Alborz 2009–2011. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)74737-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Dehghan M, Simon JF, Harrison J. Integrating the CEREC technology at UT College of Dentistry. J Tenn Dent Assoc 2012; 92:19-22. [PMID: 22870548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The computer-aided design/computer-aided manufacturing (CAD/CAM) has evolved during the past 25 years, and this evolution has improved the speed and precision in which dentists can deliver high quality esthetic restorations. CEREC is an acronym for "ceramic reconstruction" and is one of the CAD/CAM systems available to dentists in private practice. The University of Tennessee College of Dentistry was one of the first dental schools in the United States to embrace this technology and integrate it into the four-year curriculum. In a dental school setting, this technology can prove to be an educational tool for the dental students, cost effective for the University and provide exceptional service for the patients.
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Affiliation(s)
- Mojdeh Dehghan
- Department of Restorative Dentistry, Collge of Dentistry, University of Tennessee Health Center, USA.
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Joshi M, Nikalje AP, Shahed M, Dehghan M. HPTLC Method for the Simultaneous Estimation of Emtricitabine and Tenofovir in Tablet Dosage Form. Indian J Pharm Sci 2011; 71:95-7. [PMID: 20177471 PMCID: PMC2810064 DOI: 10.4103/0250-474x.51951] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Revised: 09/15/2008] [Accepted: 02/19/2009] [Indexed: 11/23/2022] Open
Abstract
A simple, precise, accurate and rapid high performance thin layer chromatographic method has been developed and validated for the estimation of emtricitabine and tenofovir simultaneously in combined dosage form. The stationary phase used was precoated silica gel 60F 254. The mobile phase used was a mixture of chloroform: methanol (9:1 v/v). The detection of spots was carried out at 265 nm. The method was validated in terms of linearity, accuracy, precision and specificity. The calibration curve was found to be linear between 200 to 1000 ng with regression coefficient of 0.9995. The proposed method can be successfully used to determine the drug content of marketed tablet formulation.
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Affiliation(s)
- Maithilee Joshi
- Y. B. Chavan College of Pharmacy, Dr. Rafiq Zakaria Campus, Rauza Bagh, Auranagabad-431 001, India
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Abstract
BACKGROUND The higher consumption of fruit and vegetables is considered to be an indicator of healthy eating and the protective effects of fruit and vegetable (FV) consumption for noncommunicable diseases have been investigated extensively. The present study aimed to investigate the association between fruit and vegetable intake (FVI), health behaviours and socio-demographic factors among adult Canadians. METHODS This analysis was based on the information from the Canadian Community Health Survey, Cycle 3.1. Daily intake of fruit and vegetables from a total number of 15,512 apparently healthy individuals, aged 18-64 years, were assessed using a structured questionnaire, which included 20 questions on the frequency of consumption of different types of fruit and vegetables. Multiple logistic regression models were used to determine the association between FVI and some socio-economic factors and lifestyle behaviour among adult Canadians. RESULTS In total 77% of Canadian adults consumed fruit and vegetables less than five times per day. Females were more likely to consume more fruit [odds ratio (OR) 2.05; 95% confidence interval (CI) 1.75-2.4], vegetables (OR 1.95; 95% CI 1.65-2.29) and FV (OR 2.52; 95% CI 2.20-2.90) than males. Single/never married individuals, individuals with higher levels of education, never smokers, former drinkers and older people reported more consumption of fruit and vegetables than others. CONCLUSIONS The results obtained in the present study indicate an association between FVI and some socio-economic and healthy lifestyle behaviours, and that a substantial gap exists between the recommended level and the actual intake of the FV among the Canadian population. Because a higher intake of FV improves public health, it is imperative to tailor nutrition education at the individual and community levels in Canadian populations.
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Affiliation(s)
- M Dehghan
- Departments of Medicine, Clinical Epidemiology and Biostatistics, Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada.
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Eslami A, Ranjbar-Bahadori S, Meshgi B, Dehghan M, Bokaie S. Helminth infections of stray dogs from garmsar, semnan province, central iran. Iran J Parasitol 2010; 5:37-41. [PMID: 22347264 PMCID: PMC3279852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/13/2010] [Accepted: 10/18/2010] [Indexed: 10/27/2022]
Abstract
BACKGROUND The aim was to study the gastro-intestinal helminths of stray dogs of Garmsar, Semnan Province, Central Iran, and its impacts on human health and animal production. METHODS During 2006, the alimentary tracts of 50 stray dogs at necropsy, selected from villages around Garmsar, were removed, and examined for helminth infections. Subsequently helminths were collected from the contents of each part and scraped sample of small intestines of washed materials in a 100-mesh sieve. To identify the species of helminths, the nematodes were cleared in lactophenol and cestodes were stained using carmine acid. RESULTS Mixed infection was the rule and 40 dogs (80%) harbored more than one species of helminth. Taenia hydatigena was the most prevalent species (80%) followed by Echinococcus granulosus (64%), Toxocara canis (22%), Mesocestoides lineatus (12%), Taenia multiceps (10%) and Dipylidium caninum (4%). The mean intensity of worm infection was low (1-3) except for that of E. granulosus (645). No significant difference was noticed between sex, age and most helminth infections except for that of sex and T. hydatigena (P=0.001) as well as age and T. canis (P=0.001). CONCLUSION Although human infection with T. hydatigena is unlikely, but other helminths reported in this study are of zoonotic importance, and may pose a threat to community health, and reduce the productions of ruminants harboring taeniid metacestodes.
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Affiliation(s)
- A Eslami
- Department of Parasitology, School of Specialized Sciences of Veterinary Medicine, Researches and Sciences Unit, Islamic Azad University, Hessarak, Tehran, Iran
| | - Sh Ranjbar-Bahadori
- Department of Parasitology, College of Veterinary Medicine, Islamic Azad University, Garmsar Branch, Garmsar, Iran
| | - B Meshgi
- Department of Parasitology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - M Dehghan
- Department of Parasitology, College of Veterinary Medicine, Islamic Azad University, Garmsar Branch, Garmsar, Iran
| | - S Bokaie
- Department of Epidemiology, Tehran Veterinary Faculty, University of Tehran, Tehran, Iran
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Hodgson JG, Sharafi M, Jalili A, Díaz S, Montserrat-Martí G, Palmer C, Cerabolini B, Pierce S, Hamzehee B, Asri Y, Jamzad Z, Wilson P, Raven JA, Band SR, Basconcelo S, Bogard A, Carter G, Charles M, Castro-Díez P, Cornelissen JHC, Funes G, Jones G, Khoshnevis M, Pérez-Harguindeguy N, Pérez-Rontomé MC, Shirvany FA, Vendramini F, Yazdani S, Abbas-Azimi R, Boustani S, Dehghan M, Guerrero-Campo J, Hynd A, Kowsary E, Kazemi-Saeed F, Siavash B, Villar-Salvador P, Craigie R, Naqinezhad A, Romo-Díez A, de Torres Espuny L, Simmons E. Stomatal vs. genome size in angiosperms: the somatic tail wagging the genomic dog? Ann Bot 2010; 105:573-84. [PMID: 20375204 PMCID: PMC2850795 DOI: 10.1093/aob/mcq011] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2008] [Revised: 07/04/2008] [Accepted: 12/21/2009] [Indexed: 05/02/2023]
Abstract
BACKGROUND AND AIMS Genome size is a function, and the product, of cell volume. As such it is contingent on ecological circumstance. The nature of 'this ecological circumstance' is, however, hotly debated. Here, we investigate for angiosperms whether stomatal size may be this 'missing link': the primary determinant of genome size. Stomata are crucial for photosynthesis and their size affects functional efficiency. METHODS Stomatal and leaf characteristics were measured for 1442 species from Argentina, Iran, Spain and the UK and, using PCA, some emergent ecological and taxonomic patterns identified. Subsequently, an assessment of the relationship between genome-size values obtained from the Plant DNA C-values database and measurements of stomatal size was carried out. KEY RESULTS Stomatal size is an ecologically important attribute. It varies with life-history (woody species < herbaceous species < vernal geophytes) and contributes to ecologically and physiologically important axes of leaf specialization. Moreover, it is positively correlated with genome size across a wide range of major taxa. CONCLUSIONS Stomatal size predicts genome size within angiosperms. Correlation is not, however, proof of causality and here our interpretation is hampered by unexpected deficiencies in the scientific literature. Firstly, there are discrepancies between our own observations and established ideas about the ecological significance of stomatal size; very large stomata, theoretically facilitating photosynthesis in deep shade, were, in this study (and in other studies), primarily associated with vernal geophytes of unshaded habitats. Secondly, the lower size limit at which stomata can function efficiently, and the ecological circumstances under which these minute stomata might occur, have not been satisfactorally resolved. Thus, our hypothesis, that the optimization of stomatal size for functional efficiency is a major ecological determinant of genome size, remains unproven.
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Affiliation(s)
- J G Hodgson
- Peak Science and Environment, Station House, Leadmill, Hathersage, Hope Valley S32 1BA, UK.
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Abstract
BACKGROUND The prevalence of obesity and being overweight is rising among adult Canadians and diet is recognised as one of the main causes of obesity. The consumption of fruit and vegetables is shown to be protective against obesity and being overweight but little is known about the association of fruit juice consumption and obesity and being overweight. The present study aimed to investigate the association between fruit juice consumption and self-reported body mass index (BMI) among adult Canadians. METHODS This analysis is based on the Canadian Community Health Survey, Cycle 3.1. A regression method was used to assess the association of fruit juice consumption with self-reported BMI in 18-64-year-old Canadians who had been adjusted for sex, age, total household income, education, self-rated health, and daily energy expenditure. Because the analysis is based on a cross-sectional dataset, it does not imply a cause and effect relationship. RESULTS Almost 38.6% of adult Canadians reported a fruit juice intake of 0.5-1.4 times per day and 18.2% consumed fruit juice more than 1.5 times per day. Participants with normal weight were likely to consume more fruit juice than obese individuals. Regression analysis showed a negative association between fruit juice consumption and BMI after adjusting for age, sex, education, marital status, income, total fruit and vegetable intake, daily energy expenditure, and self-rated health. On average, for each daily serving of fruit juice, a -0.22 unit (95% confidence interval = -0.33 to -0.11) decrease in BMI was observed. CONCLUSIONS The results obtained showed a moderate negative association between fruit juice intake and BMI, which may suggest that a moderate daily consumption of fruit juice is associated with normal weight status.
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Affiliation(s)
- N Akhtar-Danesh
- School of Nursing and Department of Clinical Epidemiology & Biostatistics, McMaster University, Hamilton, ON, Canada.
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Rezaei M, Dehghan M, Ayatollahy M. Short Communication: Determination of metabolisable energy of five cultivars of hulless barley using adult Leghorn cockerels. S AFR J ANIM SCI 2008. [DOI: 10.4314/sajas.v38i1.4105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Dehghan M, Hamad N, Yusufali A, Yusuf S, Merchant A. 311: Development of a Semi-Quantitative Food Frequency Questionnaire for use in United Arab Emirates and Kuwait. Am J Epidemiol 2005. [DOI: 10.1093/aje/161.supplement_1.s78b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Dehghan
- Population Health Research Centre, McMaster University, Hamilton ON, L8L 2X2
| | - N Hamad
- Population Health Research Centre, McMaster University, Hamilton ON, L8L 2X2
| | - A Yusufali
- Population Health Research Centre, McMaster University, Hamilton ON, L8L 2X2
| | - S Yusuf
- Population Health Research Centre, McMaster University, Hamilton ON, L8L 2X2
| | - A Merchant
- Population Health Research Centre, McMaster University, Hamilton ON, L8L 2X2
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Hosmane NS, Dehghan M, Davies S. Significance of the trimethylsilyl moiety in synthetic carborane transformations: conversion of nido-(Me3Si)2C2B4H6 to nido-(Me3Si)2C4B8H10 by thermal elimination of trimethylsilane, an important advance in carborane chemistry. J Am Chem Soc 2002. [DOI: 10.1021/ja00333a063] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dehghan M, Faez K, Ahmadi M, Shridhar M. Unconstrained Farsi handwritten word recognition using fuzzy vector quantization and hidden Markov models. Pattern Recognit Lett 2001. [DOI: 10.1016/s0167-8655(00)00090-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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