Amar Khamis

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Verified

Amar verified their affiliation via an institutional email.

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• PhD
• Professor (Full) at Mohammed Bin Rashid University of Medicine and Health Sciences

Background Trocar site hernia (TsH) is an uncommon complication of bariatric surgery but potentially serious. People with obesity are more susceptible due to the difficulty in approximating fascial tissue. This study aims to investigate whether fascial closure (FC) or non-fascial closure (NFC) of trocar sites, in patients undergoing bariatric surge...

Introduction Although curricula teaching skills related to resilience are widely adopted, little is known about needs and attitudes regarding resilience training of undergraduate-medical-trainees in Middle-East-and-North-Africa-region. The purpose of this study is to investigate the value of an innovative curriculum developed through design-based-r...

Background Type 2 diabetes mellitus (T2DM) and metabolic dysfunction–associated steatotic liver disease (MASLD), which have a reciprocal relationship compounded by obesity, are highly prevalent in the Middle East affecting morbidity, mortality, and healthcare costs. Objective This study aimed to assess the severity of MASLD and liver fibrosis amon...

Type 2 diabetes (T2D) is a heterogeneous disease influenced by both genetic and environmental factors. Recent studies suggest that T2D subtypes may exhibit distinct gene expression profiles. In this study, we aimed to identify T2D cluster-specific miRNA expression signatures for the previously reported five clinical subtypes that characterize the u...

Background/Objectives: In type 2 diabetes (T2D), collective damage to the eyes, kidneys, and peripheral nerves constitutes microvascular complications, which significantly affect patients’ quality of life. This study aimed to prospectively evaluate the risk of microvascular complications in newly diagnosed T2D patients in Dubai, UAE. Methods: Super...

Background: The orthopedic department at Al Jalila Children's Specialty Hospital (AJCH) was opened in April 2018. A focused hip ultrasound training course was conducted in April 2019 to improve hip ultrasound imaging quality. Objectives: This study aims to evaluate the impact of focused training courses on predefined image quality criteria of infan...

Objective: To assess the accuracy of three-dimensional (3D) printed one-piece vs. multiple segmented transfer trays for indirect bonding techniques in moderate and severe crowding cases. Methods: Eighty digital maxillary dental models were produced by an extraoral scanner. 3D-printed one-piece and segmented trays were virtually designed utilizing M...

The aim of the current study was to evaluate the pharyngeal airway dimensions of individuals with different skeletal patterns in a cohort of the Emirati population. The specific aim was to assess the relationship between pharyngeal airway dimensions and anterior facial height in relation to different skeletal patterns. This retrospective study was...

Introduction Medical educators strive to improve their curricula to enhance the student learning experience. The use of high-fidelity simulation within basic and clinical medical science subjects has been one of these initiatives. However, there is paucity of evidence on using simulation for teaching pharmacology, especially in the Middle East and...

Oral Presentation at the 4th International Congress of Health Workforce Education and Research (INHWE) Conference, Barcelona, Spain.

background: This study aimed to evaluate the effect of bioactive composite (ACTIVA) on enamel demineralisation when used as an orthodontic adhesive, compared to other adhesives. Materials and methods: Human upper premolars (n=64) were randomly divided into two equal groups; the first group stored the bonded teeth in deionised water for 30 days at 3...

Aim and background The Hall technique preformed metal crowns (HT-PMCs) are allegedly oversized, temporarily altering inter-arch relationships. Intra-arch dimensions and leeway space (LWS) HT effects are unknown. Aim To study single HT-PMC intra-arch effects and treated tooth dimensional changes. Materials and methods Split-mouth, quasi-experiment...

Background Attempts to subtype, type 2 diabetes (T2D) have mostly focused on newly diagnosed European patients. In this study, our aim was to subtype T2D in a non-white Emirati ethnic population with long-standing disease, using unsupervised soft clustering, based on etiological determinants. Methods The Auto Cluster model in the IBM SPSS Modeler...

Introduction Medical educators strive to improve their curricula to enhance the student learning experience. The use of high-fidelity simulation within basic and clinical medical science subjects has been one of these initiatives. However, there is paucity of evidence on using simulation for teaching pharmacology, and the effectiveness of this teac...

Polycystic ovary syndrome (PCOS) is the most common endocrine disorder affecting women of reproductive age. It increases the risk of type 2 diabetes, cardiovascular disease, endometrial cancer, infertility, gestational diabetes, preeclampsia, and preterm birth. Accurately identifying predictors of these health risks is crucial. Electronic health re...

Background: The Hall-Technique preformed-metal-crowns (HT-PMCs) are allegedly oversized, temporarily altering inter-arch relationships. Intra-arch dimensions/Leeway-space (LWS) HT effects are unknown. Aim: To study single HT-PMC intra-arch effects and treated tooth dimensional changes. Materials and Methods: Split-mouth quasi-experimental pilot stu...

Background An outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection occurred in a medical ward involving patients and hospital staff from May to June 2020. Aim The aim of this study is to determine risk factors related to the outbreak of SARS-CoV-2 in six healthcare workers (HCWs) in a medical ward with initially unreco...

Introduction During non-surgical endodontic retreatment, gutta-percha (GP) solvents are indispensable in difficult cases when used with mechanical removal, however studies comparing their efficacy against different types of GP are limited. The purpose of this study was to investigate the softening effect of three solvents on the conventional (CGP),...

Objective Periodontal disease is one of the most common infectious diseases. Several factors are associated with increased susceptibility of periodontal disease such as hormonal changes during pregnancy. Although pregnancy does not directly cause gingivitis, it can aggravate preexisting periodontal disease. This study aimed to evaluate knowledge of...

Background: Globally, patients with diabetes suffer from increased disease severity and mortality due to coronavirus disease 2019 (COVID-19). Old age, high body mass index (BMI), comorbidities, and complications of diabetes are recognized as major risk factors for infection severity and mortality. Aim: To investigate the risk and predictors of h...

Background Multisystem inflammatory syndrome in children (MISC) is a phenomenon that appeared in children infected with or exposed to severe acute respiratory syndrome‐coronavirus‐2 (SARS‐CoV‐2). The typical onset of MISC is 4−6 weeks following SARS‐CoV‐2 infection and is formulated to be due to an immune response. Methods Our study retrospectivel...

Objectives: The aims of this paper were twofold: first, to evaluate dental anxiety levels among patients undergoing oral surgery procedures; second, to assess how dental anxiety and fear are connected to age, gender, educational background, past traumatic experiences, and the frequency of dental appointments. Methods: A cross-sectional Likert-sc...

Purpose: Hall technique (HT) preformed metal crowns (PMCs) are allegedly oversized compared to conventional (C) PMCs. To investigate paediatric dentists' (PDs) perception of HT-PMCs and perception/ability to identify HT or C-PMCs on bitewings radiographs. Methods: An online cross-sectional questionnaire including ten bitewings (five of each of H...

Calculated panel reactive antibody (CPRA) is used to help increase sensitized patient’s access to transplantation. United Arab Emirates (UAE) has a diverse resident population hence we developed a UAE–CPRA calculator based on HLA antigen frequencies of the different ethnic groups that represent the UAE population. HLA antigen frequencies at serolog...

Background: Preterm labor and delivery remain a major problem in obstetrics accounting for perinatal morbidity and mortality. The challenge is to identify those with true preterm labor to avoid unnecessary hospital admissions. The fetal fibronectin (FFN) test is a strong predictor of preterm birth and can help identify women with true preterm labor...

Purpose: Pavlik harness treatment is the most common treatment in newborns diagnosed with developmental dysplasia of the hip (DDH). The success rates and predictors for failure have been debated over the last decade. In this study, we explored our treatment failure rate and potential prognostic factors that could predict the failure of Pavlik harn...

Objective criteria have been scarce in published data on the occurrence of polycystic ovary syndrome (PCOS) in the United Arab Emirates (UAE). It is crucial that we enhance our comprehension of PCOS prevalence in the UAE to inform key stakeholders about the disease’s burden and enable comparisons with other nations. This research aimed to examine t...

Background: Recording accurate impressions from maxillary defects is a critical and challenging stage in the prosthetic rehabilitation of patients following maxillectomy surgery. The aim of this study was to develop and optimize conventional and 3D-printed laboratory models of maxillary defects and to compare conventional and digital impression te...

Objectives: The COVID-19 pandemic has greatly impacted health and care workers (HCW) globally, whom are considered at greater risk of infection and death. This study aims to document emerging evidence on disease prevalence, clinical outcomes, and vaccination rates of HCWs. Methods: Three databases were surveyed resulting on 108 final articles betwe...

The last 20 years have witnessed steady research originating in Western societies on the possible correlation between spatial qualities of places and individual wellbeing. Cultural and place-specific factors, however, may limit generalizability to different settings. This study explored whether the spatial qualities of neighborhoods in the city of...

Introduction: Pregnancy, complicated by coronavirus disease 2019 (COVID-19), results in higher hospitalization and mortality rate. Pathogenesis of COVID-19 is similar to any other systemic inflammatory condition but results in a cytokine storm of higher magnitude causing severe acute respiratory distress syndrome and multiorgan failure. Tocilizuma...

Objective To study the effect of chlorhexidine on elastomeric orthodontic separators (EOS) bacterial-colonisation and gingival-health in Hall technique (HT) patients. Material and Methods Prospective in-vivo pilot clinical study of EOS bacterial colonisation and primary-molar gingival health assessment in 20 patients (mean age 5.45±1.27 years) req...

Background Embedding into undergraduate medical programs experiential research curricula, based on holistic theories of education which emphasize participation in the social world, remains uncommon. The purpose of this study was to investigate the journey of undergraduate medical students in relation to an innovative compulsory curriculum-based res...

Polycystic ovary syndrome (PCOS) is a prevalent condition that not only has the potential to impede conception but also represents the most common endocrine dysfunction in fertile women. It is considered a heterogeneous and multifaceted disorder, with multiple reproductive and metabolic phenotypes which differently affect the early- and long-term s...

Methods: This is a cross-sectional study utilizing an online questionnaire anonymously to investigate the awareness and views of dentists about SDA. The questionnaire was sent to all 901 dentists registered with the Emirates Medical Association (EMA). The questionnaire consists of 17 questions, which comprise demographics, awareness, and applicati...

BACKGROUND The secondary-to-tertiary education transition is a significant milestone in the students’ academic journey, which is characterized by multiple stressors. Although this crucial transition has been repetitively explored, the concept of proactively intervening to support this transition is still novel. OBJECTIVE In the current study, we i...

Background The high school–to–medical school education transition is a significant milestone in the students’ academic journey, which is characterized by multiple stressors. Although this crucial transition has been repetitively explored, the concept of proactively intervening to support this transition is still novel. Objective In this study, we...

Background The use of COVID-19 convalescent plasma (CCP) for the treatment of SARS-CoV-2 infection in pregnancy is intriguing in view of its safety profile in pregnancy and historical precedence of the use of plasma for other viral illnesses. This study aimed to evaluate the use of CCP in pregnant women with early COVID-19 infection. Methods This...

Background: Dental general anesthesia (DGA) is a widely utilized technique in pediatric dentistry and is indicated for a variety of cases such as very young children and children with special healthcare needs (SHCN). In the United Arab Emirates (UAE), there is a paucity of studies relating to this subject. Objective: To analyze the characteristi...

Background: Pregnant women with COVID-19 are more likely to be hospitalized and require respiratory support than non-pregnant women. There is little published data on Remdesivir use in pregnant women with COVID-19. We aimed to investigate the clinical course and obstetric outcomes for pregnant women with COVID-19 administered Remdesivir versus stan...

Introduction This study aimed to evaluate the dynamic cyclic fatigue resistance of heat-treated nickel-titanium (NiTi) files after usage and autoclaving. Methods Two heat-treated NiTi file systems with the tip sizes of #25 of ProTaper Gold F2 (PG) and TruNatomy Prime (TN) were selected. Files in each system was divided into three experimental subg...

Objective Diabetes mellitus is a major cause of morbidity in the United Arab Emirates (UAE), highlighting a significant social and economic burden impacting the development of the country. Studies have shown a bidirectional relationship between diabetes and periodontal disease. The awareness of this relationship is imperative not only for dentists...

Background: Participating in volunteering activities during students’ higher education experience is becoming more commonplace. Studies have noted that volunteering has a positive impact on the academic performance of undergraduate medical students. However, most of these studies rely on self-reported data like surveys, interviews, and journals. In...

Traumatic brain injuries (TBIs) associated with maxillofacial fractures (MFFs) are a public health concern worldwide, especially among adult-aged males. There is an urgent need for early detection of associated TBIs in patients with MFFs during the initial assessment and treatment stage to reduce morbidity and mortality. The objective of the presen...

Background: Participating in volunteering activities during students’ higher education experience is becoming more commonplace. Studies have noted that volunteering has a positive impact on the academic performance of undergraduate medical students. However, the majority of these studies rely on self-reported data like surveys, interviews, and jour...

Purpose: This study aimed to evaluate the severity of high-risk SDB in children and adolescents seeking paediatric dental care. Sleep-disordered breathing (SDB) has many untoward consequences that may interfere with children's health and is associated with several risk factors. Methods: In this cross-sectional study, the convenience sample inclu...

Our study aimed to describe the root and canal morphology of mandibular second molars in Emirati population and to study the prevalence and types of morphological change in C-shaped canal configuration along the root length in an effort to describe C-shaped molars as a unit. Cone beam computed tomography (CBCT) scans of Emirati patients were analyz...

Background: COVID-19 has infected over 123 million people globally. The first confirmed case in the United Arab Emirates (UAE) was reported on January 29, 2020. According to studies conducted in the early epicenters of the pandemic, COVID-19 has fared mildly in the pediatric population. To date, there is a lack of published data about COVID-19 infe...

Background and aims: Although the Government of Bangladesh (GoB) developed some policy initiatives during the first phase of COVID-19, their efforts were questioned due to indecision, late policy decisions and implementation, and a proliferation of fake testing and fake news. As such, this research aims to examine public trust in preparedness and...

Background: Women with gestational diabetes mellitus (GDM) are at a seven-fold higher risk of developing type 2 diabetes (T2D) within 7-10 years after childbirth, compared with those with normoglycemic pregnancy. Although raised fasting blood glucose (FBG) levels has been said to be the main significant predictor of postpartum progression to T2D,...

Background Whilst the impact of Covid-19 infection in pregnant women has been examined, there is a scarcity of data on pregnant women in the Middle East. Thus, the aim of this study was to examine the impact of Covid-19 infection on pregnant women in the United Arab Emirates population. Methods A case-control study was carried out to compare the c...

This study presents the design of a DL-framework to deliver anatomy teaching that provides a microfiche of the onsite anatomy learning experience during the mandated COVID-19 lockdown. First, using nominal-group technique, we identified the DL learning theories to be employed in blueprinting the DL-framework. Effectiveness of the designed DL-framew...

Background: Participating in volunteering activities during students’ higher education experience is becoming more commonplace. Studies have noted that volunteering has a positive impact on the academic performance of undergraduate medical students. However, the majority of these studies rely on self-reported data like surveys, interviews, and jour...

Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for causing the COVID-19 pandemic.

Background: The secondary-to-tertiary education transition is a significant milestone in the students’ academic journeys. This is particularly relevant to entry into medical schools, which is characterized by multiple stressors. Although this crucial transition has been repetitively explored, the concept of proactively intervening to support this t...

Background Diagnosis of Group A Streptococcus (GAS) pharyngitis in children is hindered by variable sensitivity of clinical criteria and rapid Strep A tests (SAT), resulting in reliance on throat cultures as the gold standard for diagnosis. Delays while awaiting culture reports result in unnecessary antibiotic prescriptions among children, contribu...

Objectives: Facial look and expression affect how people are viewed by others. This study aimed to evaluate how schoolchildren in the Emirate of Sharjah, United Arab Emirates view their peers who have discolored teeth. Materials and methods: A cross-sectional study using randomized cluster sampling of Sharjah public schools was conducted. A prev...

Background The prevalence of obesity is increasing worldwide, and the Middle East is not an exception to this increasing trend. Obesity increases the risk of multiple metabolic complications, such as diabetes mellitus. Measurement of obesity has primarily relied on the BMI to identify risk; however, both bedside and office-based anthropometric meas...

Background A putative link between asthma and asthma severity with the occurrence of cancer has been suggested but has not been fully investigated. The objective of this study is to assess the incidence of all types of cancer in a cohort of asthmatic patients. Methods and findings A single center cohort retrospective study was conducted to investi...

Background: The COVID-19 pandemic has forced medical schools to suspend on-campus live-sessions and shift to distance-learning (DL). This precipitous shift presented medical educators with a challenge, 'to create a "simulacrum" of the learning environment that students experience in classroom, in DL'. This requires the design of an adaptable and v...

Embedding an experiential research curriculum into medical programs is still not widely adopted. This study investigated, using convergent mixed methods design, the journey of medical students in relation to a research module. The students perception of the experience was qualitatively explored using thematic analysis. The students performance data...

BACKGROUND Coronavirus disease 2019 (COVID-19) has infected over 123 million people globally. The first confirmed case in the United Arab Emirates (UAE) was reported on 29th January 2020. COVID-19 has fared mildly in the pediatric population according to available literature out of early epicenters of the pandemic. To date there is a lack of publis...

Background: Coronavirus disease 2019 (COVID-19) has infected over 123 million people globally. The first confirmed case in the United Arab Emirates (UAE) was reported on 29th January 2020. COVID-19 has fared mildly in the pediatric population according to available literature out of early epicenters of the pandemic. To date there is a lack of publ...

Background: The coronavirus disease 2019 (COVID-19) pandemic continues to cause global havoc posing uncertainty to educational institutions worldwide. Understanding the clinical characteristics of COVID-19 in children is important because of the potential impact on clinical management and public health decisions. Methods: A meta-analysis was con...

BACKGROUND According to WHO prevalence of overweight is reported as 70.9% in females and 70.5% in males while the prevalence of obesity is reported as 41.2% in females and 31.6% in males in UAE. There is a paralleled rise in the incidence of related metabolic conditions, particularly type 2 diabetes, metabolic syndrome and non-alcoholic fatty liver...

Background Diagnosis of Group A Streptococcus (GAS) pharyngitis in children is hindered by variable sensitivity of clinical criteria and rapid Strep A tests (SAT), resulting in reliance on throat cultures as the gold standard for diagnosis. Delays while awaiting culture reports result in unnecessary antibiotic prescriptions among children, contribu...

BACKGROUND The COVID-19 pandemic is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). To date 267,258 cases have been reported in the United Arab Emirates (UAE) with 766 deaths. In United States of America, the Centers for Disease Control and Prevention (CDC) has categorized diabetes in terms of ‘increased risk of severe illne...

Background: Whilst the impact of Covid-19 infection in pregnant women has been examined, there is a scarcity of data on pregnant women in the Middle East. Thus, the aim of this study was to examine the impact of Covid-19 infection on pregnant women in the United Arab Emirates population. Methods: A case-control study was carried out to compare the...

Background: Enamel defects (EDs) are commonly reported dental findings in preterm/low birthweight children. EDs potentially increase caries susceptibility. Aim: To assess the prevalence of EDs and dental caries in a group of preterm children (aged 5–10 years) in Dubai, United Arab Emirates (UAE). Methodology: A retrospective cohort study of medical...

To describe a study protocol of a randomised control trial (RCT) assessing the effectiveness, in reducing dental anxiety, of an acclimatising nitrous oxide sedation (N2O) session prior to actual dental treatment with N2O. A single-centre investigator-blinded parallel-group RCT conducted in a postgraduate dental hospital in Dubai, United Arab Emirat...