- University of Nevada, Las Vegas, Biomedical Science, Faculty MemberUniversity of Nevada, Las Vegas, Clinical Sciences, Faculty Memberadd
- Dr. Neamat Hassan Abubakr, earned her Bachelor of Dental Medicine and Surgery from Mansoura University, Egypt during... moreDr. Neamat Hassan Abubakr, earned her Bachelor of Dental Medicine and Surgery from Mansoura University, Egypt during 1988; her diploma of surgical sub-specialty, in Vienna, Austria during 1993; her master’s in conservative dentistry from Dundee, Scotland during 1995; and her Ph.D. from Niigata University, Japan, during 2001. While at Niigata University, Dr. Hassan won the Monobusho scholarship grant for the duration of her Ph.D. program.
Dr. Neamat is an active contributor to educational, academic, clinical and research activities, with evidence of broad and high impact publications within the dental literature. Her approach to dental education has been to work her way up the hierarchy, learning and integrating information at each stage. She has made contacts within dental education, private practice, and dental research globally, which lead her to the commitment of academic excellence. Dr. Neamat has worked full time in dental education since 1995. She began at the University of Khartoum in Sudan where she quickly earned promotions to chair, and professor of the department. She also earned the distinction as the first female full professor of dentistry in Sudan. She supervised a significant number of master’s and Ph.D. students, as well as undergraduate and postgraduate activities that foster the development of dental education, research and clinical practice. Her research is in dental materials, oral health research, and clinical research. Her novel research was one of the first to highlight the impact of dietary components on the performance of dental materials within the oral cavity.
Degrees
Ph.D.: 2001: Niigata University, Japan
MS CRM: 2022: Arizona State University, USA
MDSc: 1995: Dundee University, Scotland, United Kingdom
DSS: 1993: University of Vienna, Austria
BDS: 1988: Mansoura University, Egypt(Dr. Neamat Hassan Abubakr, earned her Bachelor of Dental Medicine and Surgery from Mansoura University, Egypt during 1988; her diploma of surgical sub-specialty, in Vienna, Austria during 1993; her master’s in conservative dentistry from Dundee, Scotland during 1995; and her Ph.D. from Niigata University, Japan, during 2001. While at Niigata University, Dr. Hassan won the Monobusho scholarship grant for the duration of her Ph.D. program.<br /> Dr. Neamat is an active contributor to educational, academic, clinical and research activities, with evidence of broad and high impact publications within the dental literature. Her approach to dental education has been to work her way up the hierarchy, learning and integrating information at each stage. She has made contacts within dental education, private practice, and dental research globally, which lead her to the commitment of academic excellence. Dr. Neamat has worked full time in dental education since 1995. She began at the University of Khartoum in Sudan where she quickly earned promotions to chair, and professor of the department. She also earned the distinction as the first female full professor of dentistry in Sudan. She supervised a significant number of master’s and Ph.D. students, as well as undergraduate and postgraduate activities that foster the development of dental education, research and clinical practice. Her research is in dental materials, oral health research, and clinical research. Her novel research was one of the first to highlight the impact of dietary components on the performance of dental materials within the oral cavity.<br />Degrees<br />Ph.D.: 2001: Niigata University, Japan<br />MS CRM: 2022: Arizona State University, USA<br />MDSc: 1995: Dundee University, Scotland, United Kingdom<br />DSS: 1993: University of Vienna, Austria<br />BDS: 1988: Mansoura University, Egypt)edit
Limited information is available about the mechanical behavior of compomer under intraoral conditions. This in vitro study evaluated changes in the mechanical properties and surface texture of compomer and other materials, used in similar... more
Limited information is available about the mechanical behavior of compomer under intraoral conditions. This in vitro study evaluated changes in the mechanical properties and surface texture of compomer and other materials, used in similar clinical circumstances, when immersed in various media. Hardness measurement for 5 tested materials and 4 immersion media was obtained with a Vickers hardness testing machine. Compressive strength was measured using an Autograph at a crosshead speed of 0.75 mm/min. All readings were taken for up to a 60-day period. An electron probe microanalyzer was used to give an SEM image. The average compressive strength and Vickers surface hardness showed a significant difference between materials. Results showed an overall increase in the solubility of specimens immersed in low pH soft drinks. There was a difference in the mechanical properties and surface texture of the materials tested in this study when they were immersed in various media.
Research Interests: Materials Science, Dentistry, Biomedical Engineering, Medicine, Immersion, and 15 moreCompressive Strength, Prosthetic Dentistry, Composite Material, Hardness, Beverages, Composite resins, Alcoholic Beverages, Carbonated Beverages, In Vitro Studies, Polymethyl Methacrylates, Materials Testing, Electron Probe Microanalysis, Silicates, Mechanical Property, and Methacrylates
Research Interests: Materials Science, Dentistry, Biomedical Engineering, Laser, Dental Materials, and 15 moreMedicine, Immersion, Humans, Erosion, Microscope, Laser Scanning, Citrus, Beverages, Composite resins, Analysis of Variance, Alcoholic Beverages, Carbonated Beverages, Silicates, Statistics as Topic, and Methacrylates
Research Interests: Materials Science, Dentistry, Biomedical Engineering, Fluoride, Dental Materials, and 15 moreMedicine, Adhesive, Humans, Animals, Cement, Fluorides, Cattle, Cariostatic Agents, Dentin, Dental Enamel, Materials Testing, Electron Probe Microanalysis, Resin Cements, Pit and Fissure Sealants, and Dentin bonding agents
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The purpose of this study was to observe and measure the morphological changes that occur in the hard tissue after the application of Er:YAG laser. Another objective was to evaluate and compare the duration of application of both the... more
The purpose of this study was to observe and measure the morphological changes that occur in the hard tissue after the application of Er:YAG laser. Another objective was to evaluate and compare the duration of application of both the laser apparatus and a conventional cutting device. In this study, sound and newly extracted carious tissues were used. The morphological changes in hard tooth structures produced by Er:YAG laser irradiation were examined by using a laser scanning microscope. Results showed that appropriate laser irradiation was 100 mJ/pulse for dentin, and 200 mJ/pulse for enamel. Also, the laser scanning microscope images were less damaged than the SEM images due to pretreatment of the specimens. The time taken to remove carious enamel by laser irradiation was slightly longer than the compared rotary cutting device; however, no differences between the two methods were observed in case of carious dentin removal.
Research Interests: Materials Science, Dentistry, Biomedical Engineering, Laser, Confocal Microscopy, and 15 moreDental Materials, Medicine, Humans, Lasers, Dental Caries, Laser Scanning, Erbium, Analysis of Variance, Irradiation, Dentin, Laser Therapy, Dental Enamel, Electron Probe Microanalysis, Equipment Design, and coloring agents
Research Interests: Materials Science, Dentistry, Biomedical Engineering, Laser, Dental Materials, and 15 moreMedicine, Humans, Lasers, Erbium, Composite Material, Composite resins, Analysis of Variance, Irradiation, Dentin, Dental Bonding, Dental Enamel, Dental marginal adaptation, Dentin bonding agents, Dental leakage, and coloring agents
Research Interests: Materials Science, Dentistry, Colorimetry, Medicine, Color, and 15 moreEthanol, Fruit, Composite resins, Analysis of Variance, Esthetic, Esthetic Dentistry, Carbonated Beverages, Polymethyl Methacrylates, Materials Testing, Silicates, Resin Cements, Glass Ionomer Cement, Colorimeter, drug storage, and Methacrylates
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ABSTRACT ABSTRACT Background: The technical quality of root fillings performed by undergraduate students indicated unsatisfactory results. Aim: The aim of the present study was to investigate the difficulties and amount of time... more
ABSTRACT ABSTRACT Background: The technical quality of root fillings performed by undergraduate students indicated unsatisfactory results. Aim: The aim of the present study was to investigate the difficulties and amount of time encountered by final year dental students during performing conventional root canal treatment for a molar tooth. Methods: A questionnaire was distributed to 325 students in four different Dental Faculties in Sudan. The levels of difficulties during performing access cavity preparation, instrumentation, isolation and obturation of the root canals of a molar tooth. Also information regarding the time spent on procedures were recorded based on categorized groups. Results: Results showed that 64.9% had difficulty in maintaining an aseptic field. Moderate difficulty was recorded in both locating the canal orifices (48.3%) and mechanical preparation of the root canal (45.0%). Obturating the root canal was the most time demanding procedure among all other procedures according to 49.2% of the students. Conclusion: In conclusion, results seem to signify noticeable obstacles among undergraduate students to maintain an aseptic field. Also obturating the root canal appeared to be the most time demanding procedure.
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Research Interests: Chemistry, Dentistry, Fluoride, Medicine, Immersion, and 15 moreIon selective electrodes, Humans, Diffusion, Fluorides, Citrus, Beverages, Composite resins, Analysis of Variance, Alcoholic Beverages, Esthetic, Cariostatic Agents, Esthetic Dentistry, Carbonated Beverages, Materials Testing, and Electron Probe Microanalysis
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To investigate variations in the root canal systems of first and second permanent mandibular molar teeth in a Sudanese population using a clearing technique.
Research Interests: Dentistry, Dental Anthropology, Sri Lanka, Adolescent, Medicine, and 15 moreHumans, Odontology, Female, Male, Mandible, Morphological Variation, Middle Aged, Sodium Hypochlorite, Adult, Root Canal, Dental Pulp Cavity, European Continental Ancestry Group, Asian Continental Ancestry Group, Endodontic, and Molar
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IntroductionReflection on competency helps students become more proficient in performing skills, with the ultimate goal of better retention of knowledge and skill. Competency progression involves a complex interplay of factors, and not... more
IntroductionReflection on competency helps students become more proficient in performing skills, with the ultimate goal of better retention of knowledge and skill. Competency progression involves a complex interplay of factors, and not having the insight of such multiple perspectives of the same experience, we will not be able to understand students as learners fully and consequently may rely on assumption and may not be able to provide the necessary interventions for growth and progress towards competency. This study aims to investigate students' insight of their own progression during psychomotor skill development.Materials and MethodsData were obtained from scanned reflective dialogue log document portfolios from the preclinical fixed dental prosthodontics section, which is part of a comprehensive dental care course during the second year. Data were coded using NVivo software version 12 plus (QSR International Pty Ltd, Vic, Australia), and subsequent thematic analyses identified emerging themes.ResultsThree themes emerged and these were (a) challenges to overcome, (b) feed‐back and self‐appraisal, and (c) progress and growth. The qualitative data generated did not reveal considerable variation in the students' reflections, and the three themes seem to interrelate.ConclusionsThe main challenge was the concept of the single path of insertion and the perception that it was a source of frustration during this course. Self‐appraisal identified time management issues and the transformation from preconceived or learned concepts. As the semester progressed, students reflected progress and growth.
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Introduction: The aim of the present study was to compare hand stainless steel K-files and Nickel-Titanium Profile 0.04 taper 29 series rotary instruments for their efficiency, procedural errors and time consumed in preparation of root... more
Introduction: The aim of the present study was to compare hand stainless steel K-files and Nickel-Titanium Profile 0.04 taper 29 series rotary instruments for their efficiency, procedural errors and time consumed in preparation of root canal system. Materials and methods: A total of 46 maxillary and mandibular first premolars extracted for orthodontic purposes were collected (two contralateral teeth from each individual). The samples were divided into two groups of 34 canals each. Teeth in the first group were prepared with stainless steel hand K-files while the second groups were prepared with profile 0.04 taper series 29 rotary files. Preparation period was recorded for both groups. Impression material was introduced into the prepared canals so that the replica of prepared canals was achieved. These were assessed under stereomicroscope to assess the efficiency in preparing canals in respect to canal smoothness, ability of impression material to flow and quality of taper.Statistical analyses were performed using t-test, Chi-square and Fishers exact tests. Results: RESULTS showed significantly shorter preparation time for Profile than K-file. 8.8% of the canals prepared with K-files showed canal blockage, while all canals prepared with Profile remained patent. Alterations in working length working distance appeared in 23.5% of canals prepared with K-file and 11.7% in canals prepared with Profile. Failed instruments in K-files were significantly higher, mostly deformation (P<0.001). Profiles failed instruments were in the form of fracture and no deformation was detected. Both systems showed unsatisfactory walls smoothness and flow. Conclusion: Within the limitation of this study it was concluded that Profile 0.04 taper series 29 rotary systems prepare canals more rapidly, and have lower incidences of fracture and blockages, and only limited loss of working length. Canal preparation with K-file was time consuming and showed higher incidence of deformed instruments; overall, rotary instruments seem to offer greater advantages.
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Introduction: The purpose of this in vitro study was to evaluate the sealing ability of the readymade temporary filling and hand mixed materials by assessing coronal microleakage. Materials and methods: Standardized access cavities were... more
Introduction: The purpose of this in vitro study was to evaluate the sealing ability of the readymade temporary filling and hand mixed materials by assessing coronal microleakage. Materials and methods: Standardized access cavities were prepared in 80 intact human permanent premolar teeth. They were divided randomly into four experimental groups (n=20). The teeth were restored using one of the temporary materials including Cavisol, Litrak, Zinc phosphate cement, Zinconol (IRM). Thermocycling was applied on the specimens. Methylene blue dye was applied and penetration was evaluated under stereomicroscope. Grading of the microleakage pattern was from 1 to 3, with 3 providing the best seal. Results were analyzed using one-way ANOVA test (P<0.05). Results: Microleakage of Cavisol and Litrak samples achieved grade 3; whereas zinc phosphate cement and Zinconol samples absorbed the dye into the bulk of the materials. Cavisol was found to exhibit the best seal amongst the four tested materials followed by Litrak, zinc phosphate cement, and Zinconol. There was a statistically significant difference in the microleakage scores obtained between the materials (P<0.01). Conclusion: Among the four materials tested, readymade temporary filling provided the best sealing ability over hand-mixed. This study emphasizes the importance of correct placement and sufficient thickness of temporary filling materials in endodontic access cavities to ensure a tight seal.
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Research Interests: Dentistry, Incidence Geometry, Adolescent, Medicine, Sudan, and 15 moreProspective studies, Humans, Female, Male, Root Canal Treatment, Young Adult, Visual Analogue Scale, Postoperative pain, Middle Aged, Endodontics, Adult, Randomized Controlled Trial, Root Canal, Root Canal Therapy, and root canal preparation
Research Interests: Dentistry, Dental Anthropology, Sri Lanka, Adolescent, Medicine, and 15 moreHumans, Odontology, Female, Male, Mandible, Morphological Variation, Middle Aged, Sodium Hypochlorite, Adult, Root Canal, Dental Pulp Cavity, European Continental Ancestry Group, Asian Continental Ancestry Group, Endodontic, and Molar
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Aims: Several factors influence the development of white spot lesions (WSLs), and one of these is fixed orthodontic appliances. This study aims to evaluate the awareness, preventive strategies, and management of WSLs among a group of... more
Aims: Several factors influence the development of white spot lesions (WSLs), and one of these is fixed orthodontic appliances. This study aims to evaluate the awareness, preventive strategies, and management of WSLs among a group of Orthodontists. Materials and Methods: A qualitative methodology was applied; four focus groups made up a purposive sample from Orthodontists with various training backgrounds while working within the same healthcare services. Results: Three main themes emerged: awareness and ability to diagnose WSLs, perceived influences on the development of WSLs, and prevention and management strategies and barriers to care delivery. All focus groups agreed that there is a need for continuous prevention and preventive strategies of WSLs, particularly among orthodontic patients. There was also a consensus that orthodontic treatment should be delayed until WSLs are managed appropriately. Conclusions: Within the limitation of this study, WSLs were collectively agreed to ...
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Blending face-to-face and online learning should create a focused environment that supports deep and meaningful teaching and learning that engages learners in a more active and collaborative educational experience. The present study aimed... more
Blending face-to-face and online learning should create a focused environment that supports deep and meaningful teaching and learning that engages learners in a more active and collaborative educational experience. The present study aimed to evaluate students’ online and blended learning educational environment self-perception at the Faculty of Dentistry, Kuwait University, during the COVID-19 pandemic. Methods: Undergraduate dental students who participated in blended learning with online lectures were invited to participate. The sample was a non-probability convenient sample, which included all clinical dental students invited to participate, who were enrolled in the fifth, sixth, and seventh (clinical year) years. All 69 students in these three clinical years were invited to participate. Electronic consent to participate and a self-administered questionnaire of two parts were completed. Part one of the questionnaire utilized the five subscales of the Dundee Ready Educational Envi...
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ABSTRACT Abstract Introduction The aim of the present study was to investigate and compare the fracture resistance of root canals filled with Resilon/Epiphany and those that were obturated with Gutta percha/AH plus endodontic sealers.... more
ABSTRACT Abstract Introduction The aim of the present study was to investigate and compare the fracture resistance of root canals filled with Resilon/Epiphany and those that were obturated with Gutta percha/AH plus endodontic sealers. Materials and methods A total of 60 extracted human single rooted teeth were selected; 25 teeth for each test group and 5 for each control group. After conducting conventional endodontic treatment, the teeth were immersed in physiologic saline solution for thirty days, and subsequently sealed and stored. All root specimens were stored for 2 weeks in 100% humidity to allow complete setting of the sealer. Each specimen was mounted in acrylic in a polyvinyl ring and tested for fracture resistance with the Universal testing machine. The loading fixture of the machine was mounted with its spherical tip aligned with the center of the canal opening of each root. A vertical loading force was applied until it fractured the root. Results were evaluated statistically by sing using one-way ANOVA and the multiple comparisons among the groups were carried out by the Kruskal–Wallis test. Results The results showed no significant differences in the fracture resistance between the two tested groups of endodontic sealers. Conclusion Within the limitation of the present in vitro study, there were no significant differences in term of fracture resistance of teeth obturated with Resilon/Epiphany sealer and those with Gutta percha/AH Plus sealer.
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Research Interests: Dentistry, Adolescent, Medicine, Sudan, Humans, and 8 moreFemale, Male, Young Adult, Aged, Middle Aged, Adult, Mastication, and Oral Science
Background: Molar incisor hypomineralization (MIH) is the presentation of an enamel defect, where incisors and one (or more) molars are affected. Identifying MIH is significant in restoring its visual defect and avoiding pain or other... more
Background: Molar incisor hypomineralization (MIH) is the presentation of an enamel defect, where incisors and one (or more) molars are affected. Identifying MIH is significant in restoring its visual defect and avoiding pain or other consequences of this condition. The present cross-sectional study aimed to evaluate the awareness, ability, and confidence in identifying MIH among postgraduate residents in the state of Nevada. Methods: This cross-sectional study was conducted among postdoctoral dental residents at the School of Dental Medicine, University of Nevada, Las Vegas. This cross-sectional study used images of cases of MIH and a survey to collect the data. The survey included demographics, educational background, and basic knowledge of MIH. Results: The response rate to the invitation to participate was 91%. The confidence in identifying MIH was 100%, 50%, and 33.3% for pediatric, orthodontic, and general practice residency (GPR). A total of 70% were aware of this anomaly fro...
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Aims: The aim of this study was to evaluate the cultural, psychological, and religious influences on the choice of autografts, allografts, xenografts, and synthetic bone products for the grafting procedure and with implant placement.... more
Aims: The aim of this study was to evaluate the cultural, psychological, and religious influences on the choice of autografts, allografts, xenografts, and synthetic bone products for the grafting procedure and with implant placement. Materials and Methods: A qualitative methodology was employed, using the principles of the constant comparative method of the grounded theory; to investigate how people perceive and understand their experiences regarding the graft materials in implant dentistry. The data were collected using detailed qualitative interviews, till saturation was achieved, from 10 patients. Results: The three main themes that emerged in the analysis were: (a) grafting material preference, (b) religious and psychological influences, and (c) trust the doctor and cost influences. The three themes that emerged seemed to be interrelated. There were many statements of preference or rejection of choice based on religious, cultural, and psychological influences. Conclusions: Withi...
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OBJECTIVE To investigate the effect of benfotiamine on urinary albumin excretion (UAE) and the tubular damage marker kidney injury molecule-1 (KIM-1) in patients with type 2 diabetes and nephropathy. RESEARCH DESIGN AND METHODS Patients... more
OBJECTIVE To investigate the effect of benfotiamine on urinary albumin excretion (UAE) and the tubular damage marker kidney injury molecule-1 (KIM-1) in patients with type 2 diabetes and nephropathy. RESEARCH DESIGN AND METHODS Patients with type 2 diabetes and UAE equivalent to 15–300 mg/24 h, despite ACE inhibitors (ACE-Is) or angiotensin receptor blockers (ARBs), were randomly assigned to 12 weeks of benfotiamine (900 mg/day) (n = 39) or placebo (n = 43). RESULTS Compared with placebo, benfotiamine treatment resulted in significant improvement of thiamine status (P < 0.001). Benfotiamine treatment did not significantly decrease 24-h UAE or 24-h KIM-1 excretion. CONCLUSIONS In patients with type 2 diabetes and nephropathy, high-dose benfotiamine treatment for 12 weeks in addition to ACE-Is or ARBs did not reduce UAE or KIM-1 excretion, despite improvement of thiamine status.
Research Interests: Immunology, Medicine, Humans, Internal Medicine, Diabetes mellitus, and 15 moreDamage, Female, Disease, Male, Diabetic Nephropathy, Clinical Sciences, Aged, Adult, Biological markers, Controlled Clinical Trial, Albuminuria, Angiotensin Converting Enzyme Inhibitors, Diabetes Care, Medical and Health Sciences, and Diabetic nephropathies
Introduction The aim of the present study was to investigate and compare the apical sealing ability of Resilon/Epiphany-filled root canals with those that were obturated with gutta-percha/AH-Plus endodontic sealer. Materials and Methods A... more
Introduction The aim of the present study was to investigate and compare the apical sealing ability of Resilon/Epiphany-filled root canals with those that were obturated with gutta-percha/AH-Plus endodontic sealer. Materials and Methods A total of 60 extracted human single-rooted teeth were selected; 25 teeth for each test group and five for each control group. After conducting conventional endodontic treatment, the teeth were immersed in physiologic saline solution for thirty days, and subsequently sealed and stored in methylene blue dye solution for seven days. The teeth were sectioned to evaluate the linear apical leakage using a stereoscopic microscope. The data were statistically analyzed by non-parametric Kruskal-Wallis and Mann-Whitney U tests. Results The results showed significant differences between the two groups of endodontic sealers (P<0.001). Conclusion Within the limitation of the present in vitro study, Resilon/Epiphany sealer had better apical sealing ability tha...
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The aim of the present study was to compare hand stainless steel K-files and Nickel-Titanium Profile 0.04 taper 29 series rotary instruments for their efficiency, procedural errors and time consumed in preparation of root canal system. A... more
The aim of the present study was to compare hand stainless steel K-files and Nickel-Titanium Profile 0.04 taper 29 series rotary instruments for their efficiency, procedural errors and time consumed in preparation of root canal system. A total of 46 maxillary and mandibular first premolars extracted for orthodontic purposes were collected (two contralateral teeth from each individual). The samples were divided into two groups of 34 canals each. Teeth in the first group were prepared with stainless steel hand K-files while the second groups were prepared with profile 0.04 taper series 29 rotary files. Preparation period was recorded for both groups. Impression material was introduced into the prepared canals so that the replica of prepared canals was achieved. These were assessed under stereomicroscope to assess the efficiency in preparing canals in respect to canal smoothness, ability of impression material to flow and quality of taper.Statistical analyses were performed using t-tes...
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INTRODUCTION: The purpose of this in vitro study was to evaluate the sealing ability of the readymade temporary filling and hand mixed materials by assessing coronal microleakage. MATERIALS AND METHODS: Standardized access cavities were... more
INTRODUCTION: The purpose of this in vitro study was to evaluate the sealing ability of the readymade temporary filling and hand mixed materials by assessing coronal microleakage. MATERIALS AND METHODS: Standardized access cavities were prepared in 80 intact human permanent premolar teeth. They were divided randomly into four experimental groups (n=20). The teeth were restored using one of the temporary materials including Cavisol, Litrak, Zinc phosphate