Mohammed Nasser Alhajj

Mohammed Nasser Alhajj
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Mohammed verified their affiliation via an institutional email.
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Mohammed verified their affiliation via an institutional email.
Thamar University · Faculty of Dentistry - Department of Prosthodontics

BDS, MClinDent, PhD (Prosthodontics)

About

92
Publications
89,879
Reads
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1,205
Citations
Education
June 2019 - October 2022
University of Science Malaysia
Field of study
  • Prosthodontics
January 2013 - July 2016
University of Khartoum
Field of study
  • Prosthodontics
October 1999 - October 2004
Tishreen University
Field of study
  • Dentistry

Publications

Publications (92)
Article
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Determination of the occlusal vertical dimension (OVD) is an integral part of complete dentures fabrication. Due to the lack of teeth, the clinician faces the challenge of how to accurately establish the OVD of the new denture. Therefore, the purpose of this review article was to present, discuss and critique the available methods used in determini...
Article
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Aims The aim of this study was to explore the perceived sources of stress reported by dental students from fourteen different countries. Methods A total of 3568 dental students were recruited from 14 different dental schools. The dental environmental stress (DES) questionnaire was used including 7 domains. Responses to the DES were scored in 4‐poi...
Article
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Objectives: The extent to which dentists are happy with their profession and their life has not been well studied. The present study aimed to explore the level of happiness, satisfaction with life and psychological well-being among a sample of dental professionals from 21 countries. Materials and Methods: The sample comprised 2,200 dentists from...
Article
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Objectives E-cigarette use has become popular, particularly among the youth. Its use is associated with harmful general and oral health consequences. This survey aimed to assess self-reported oral hygiene practices, oral and general health events, and changes in physiological functions (including physical status, smell, taste, breathing, appetite,...
Article
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Background E-cigarette use is a trend worldwide nowadays with mounting evidence on associated morbidities and mortality. Dentists can modify the smoking behaviors of their patients. This study aimed to explore the knowledge, beliefs, attitude, and practice of E-cigarette use among dental students. Materials and methods This multinational, cross-se...
Article
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The prevalence of teeth impaction varies substantially between different populations, and the impaction of third molars is the most commonly recorded. This study aimed to explore the prevalence and pattern of the third molars impactions among Yemeni population. This was a retrospective radiographic study conducted in Yemen between 2022 and 2023. Th...
Article
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Objective The present study sought to assess the prevalence and determinants of tobacco use (cigarette smoking and shisha use) and khat chewing among Yemeni adolescents, and to evaluate their knowledge and attitudes toward these habits. Methods This school-based cross-sectional study was conducted among 13 to 19-year-old students attending middle/...
Article
Background and Objective Ageism represents an important barrier to high‐quality healthcare for older adults. The present study sought to translate and validate the Arabic version of the Ageism Scale for Dental Students (ASDS‐Arabic). Materials and Methods The 27‐item ASDS tool was translated from English into Arabic following recommended cross‐sec...
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Fracture resistance is an important parameter used to predict the performance of indirect dental restorations. The purpose of this in vitro study was to assess the fracture load of posterior milled nanoceramic crowns, in comparison with the lithium disilicate crowns, after fatigue loading, for two different restoration occlusal thicknesses. Forty t...
Article
Objectives The objective of this review was to assess clinical trials that have examined the materials, design, and bonding of ceramic cantilevered resin‐bonded fixed dental prostheses (RBFDPs) as a potential option for replacing missing anterior teeth. The evaluation primarily focuses on the rate of restoration failure and clinical complications....
Article
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Background The present systematic review and meta-analysis investigated the available evidence about the adherence of Candida Albicans to the digitally-fabricated acrylic resins (both milled and 3D-printed) compared to the conventional heat-polymerized acrylic resins. Methods This study followed the guidelines of the Preferred Reporting Items for...
Article
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Objective The purpose of this study is to investigate the type of ridge (degree of angulation of the lingual concavity) and the buccolingual dimensions in the area of the first and second molars in both genders of different ages and how this will affect implant placement in the posterior mandible. Materials and Methods This retrospective cross‐sec...
Article
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Background Photodynamic therapy (PDT) has been recently proposed as a promising alternative therapy for Denture Stomatitis (DS). The present systematic review and meta-analysis investigated the current available evidence regarding the efficacy of PDT in the management of DS. Materials and methods PubMed, Scopus, Web of Science, Google Scholar, and...
Article
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Background and Objectives: Due to a lack of long-term clinical studies that would clarify whether the insertion of three mini-implants (MDIs) can be as successful treatment as the insertion of four MDIs for the retention of mandibular overdentures (ODs), this 5-year prospective cohort study was set up. Materials and Methods: Participants (n = 83) r...
Article
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Objectives This study aimed to assess the color stability, surface roughness, and flexural properties of the injection-molded thermoplastic polyamide Vertex ThermoSens denture base resin following a 3-minute immersion in Polident 3-minute denture cleanser. Methods Sixty specimens (Vertex ThermoSens) were processed and divided into two main groups...
Article
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Background A possible relationship between periodontitis (PD) and COVID-19 and its adverse outcomes has been suggested. Hence, the present systematic review and meta-analysis aimed to investigate the available evidence regarding the potential association between periodontitis (PD) and COVID-19 and its adverse outcomes. Materials and methods PubMed...
Preprint
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Background: Photodynamic therapy (PDT) has recently been proposed as a promising therapeutic option for Denture Stomatitis (DS). This updated systematic review and meta-analysis investigated the current evidence regarding the efficacy of PDT for DS. Materials and methods: PubMed, Scopus, Web of Science, Google Scholar, and ProQuest were searched up...
Article
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Background In the era of the internet, patients seek health information ahead of getting the required treatment. Dental implant, which is among the most sought dental treatments, is not an exception. Incorrect health related information may lead to harmful deeds, so this study sought to assess the quality of web-based Arabic health information on d...
Article
Objective: whether gag reflex, a common problem encountered during dental procedures, is associated with the different types of the soft palate has not been addressed so far. This preliminary study sought to assess the potential association between the different types of soft palate and gag reflex. Material and Methods: one hundred dental patients...
Article
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Purpose: This systematic review and meta-analysis aimed to summarize available evidence regarding the effect of horizontal glass fiber posts (HGFP) on fracture strength and fracture pattern of endodontically treated teeth (ETT) compared to controls without HGFP. The review protocol was registered on the OSF registries. Methods: Literature search...
Article
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Purpose: The present meta-analysis aimed to answer the following research question: In endodontically treated teeth (ETT), what is the effect of partial ferrule (PF) on fracture resistance compared to complete ferrule (CF) and/or no ferrule (NF)? Study selection: PubMed, Scopus, Web of Science, and Google Scholar were searched for relevant studies...
Article
Objective: To investigate the effect of calcium hydroxide intracanal medicament on the push-out bond strength of resin-based and calcium silicate-based endodontic sealers. Methods: A comprehensive search of was conducted for all relevant in-vitro studies. All randomized controlled in-vitro studies that evaluated the effect of calcium hydroxide o...
Article
Objectives : To investigate the available evidence on the efficacy of lycopene in the management of oral potentially malignant disorders (OPMDs). Methods : PubMed, Scopus, Web of Science, Google Scholar, China National Knowledge Infrastructure (CNKI) and ProQuest databases were searched up to 20 April 2022. All clinical trials that assessed the ef...
Article
Titanium production using mold sintering is a time-consuming and costly technique. This study aimed to develop a formula for moldless porous titanium that can be used for dental post systems in dentistry. Three different percentages of titanium powder (size ≤ 150 µm) were selected as follows: 85 wt% titanium powder (G1), 90 wt% titanium powder (G2)...
Article
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Objective: The aim of this study was to investigate the alveolar bone density and thickness in Chinese participants with and without periodontitis. Methodology: This study was retrospective and cross-sectional in nature and used cone-beam computed tomography (CBCT) to evaluate alveolar bone loss, bone density, and bone thickness around 668 mandi...
Article
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Objectives: This study aimed to investigate the possible risk factors associated with periodontal diseases among adult dental patients in Yemen. Methods: The study population comprised of 805 patients attending the teaching dental hospital in Dhamar city, Yemen. The first part of investigation was interview including age, gender, systemic diseases,...
Article
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Background: Gingival enlargement (GE) is one of the most common soft tissue problems encountered during fixed orthodontic treatment. Aims: This study aimed to evaluate the factors affecting GE in adolescents and young adults, compared with their normal peers. Subjects and methods: This is a cross-sectional comparative study. The sample consisted...
Article
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Introduction: The objective of a complete denture prosthesis is restoring aesthetics, comfort, and function by the replacement of missing dental and alveolar structures employing a stable prosthesis. Case Report: Many conditions can complicate the treatment plan and fabrication of a complete denture prosthesis. Complete denture fabrication in clini...
Article
Purpose : The fracture resistance of dental post systems is influenced by the material of the post. The purpose of this systematic review and meta-analysis was to assess if there is a difference in fracture resistance between prefabricated dental titanium posts and fiber posts. Methods : An online electronic search was performed using the PubMed,...
Article
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Background: Oral lichen planus (OLP) is a chronic inflam-matory disorder with a potential of malignant transformation. Despite the extensive research on the topic, the management of OLP is still quite challenging, with no definitive cure. Objective: The present systematic review assessed the efficacy of topical hyaluronic acid in the management of...
Article
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Aim: The aim of this study was to determine the lateral pterygoid muscle (LPM) in relation to preauricular skin measured from computed tomography (CT) scan measurements. Materials and methods: CT scans of 160 patients aged between 18 and 75 years were retrospectively collected and analyzed, and the distances were measured to determine the locati...
Article
Statement of problem: A comprehensive bibliometric analysis to determine different aspects of the Journal of Prosthetic Dentistry is lacking. Purpose: The purpose of this bibliometric study was to analyze the characteristics of the Journal of Prosthetic Dentistry between 1970 and 2019. Material and methods: The Web of Science Core Collection w...
Article
Objectives The purpose of the present systematic review and meta-analysis was to assess the available evidence regarding the efficacy of curcumin mouthwashes on plaque and gingivitis. Methods A comprehensive online search of multiple databases (PubMed, Scopus, Web of Science, and Google Scholar) was performed to identify all relevant studies publi...
Article
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Background: Hemimaxillectomy of acquired palatal defects may predispose the patient to hypernasal speech, leakage of fluids into the nasal cavity, impaired masticatory function, and swallowing difficulties leading to a detrimental impact on the quality of life. Sequentially, it can also affect individual character and trust in social life, leading...
Article
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Objective: The aim of this experimental study was to assess the effect of khat extract with different concentrations on the corrosion resistance of cobalt-chromium (Co-Cr) dental alloys used for removable denture. Material and Methods: The corrosion resistance of three Co-Cr alloys (Neobond II®, Kera 501® and PD Casta H®) was evaluated in artificia...
Article
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Background Currently, the Internet seems to be a helpful tool for obtaining information about everything that we think about, including diseases, their prevention and treatment approaches. However, doubts exist regarding the quality and readability of such information. This study sought to assess the quality and readability of web-based Arabic info...
Article
A number of epidemiological studies have suggested a positive association between periodontal diseases and oro-digestive cancers, including liver cancer. The purpose of the present systematic review was to analyze the current evidence regarding the potential association between periodontitis and/or tooth loss and the risk of liver cancer. A compreh...
Article
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Background This study sought to assess the quality and readability of web-based Arabic health information on COVID-19. Methods Three search engines were searched on 13 April 2020 for specific Arabic terms on COVID-19. The first 100 consecutive websites from each engine were analyzed for eligibility, which resulted in a sample of 36 websites. These...
Article
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Aim: This study aimed to assess the quality and readability of the available health information on the net regarding denture hygiene. Materials and methods: Three search engines (Google, Yahoo!, and Bing) were searched. The first 20 consecutive websites from each engine were obtained and checked for eligibility. For the quality of the websites,...
Article
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Background The perception of dentofacial esthetics differs considerably between patients and dentists. Patient’s expectations regarding his/her esthetics are important and should be assessed ahead of any planning of esthetic treatment. The aim of this study was to explore the differences in perception of orofacial appearance by laypersons with diff...
Article
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Objective: Endodontically treated teeth may require posts for retaining the core and replacing the coronal structures that have been lost. The objective of this study was to evaluate and compare the push-out bond strength between different types of post cemented with different types of luting cement at different types of root level. Materials and...
Preprint
Full-text available
Objective: The study sought to assess the quality and readability of the web-based Arabic health information on COVID-19. Methods: Selected search engines were searched on 13 April 2020 for specific Arabic terms on COVID-19. The first 100 consecutive websites from each engine were obtained. The quality of the websites was analyzed using the Health...
Article
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Background: Recurrent aphthous stomatitis (RAS) is a highly prevalent oral mucosal disease. The management of RAS is quite challenging, and as yet, there is no definitive cure. The present systematic review and meta-analysis assessed the efficacy of a single application of topical doxycycline for the management of RAS. Methods: A comprehensive o...
Article
Background Oral lichen planus (OLP) is a relatively common inflammatory disease, with unclear etiology. A number of studies have linked Epstein‐Barr virus (EBV) with OLP. The present systematic review and meta‐analysis aimed to evaluate the available evidence regarding the potential association between EBV and OLP. Methods Online databases (PubMed...
Article
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Statement of problem Displacement of impression copings and/or implant replicas during impression making and dimensional changes that occur during clinical and laboratory phases of making multiunit implant prostheses may affect the accuracy and fit of the prostheses. Purpose The purpose of this qualitative study was to investigate and compare 3 di...
Article
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Objective: The present study aimed to explore the prevalence of melanin pigmentation in a sample of Yemeni population and its relation to some possible risk factors. Material and Methods: This cross-sectional study was performed on 440 patients attending a private clinic. Printed questionnaires were introduced to the patients and a clinical examina...
Article
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Objectives Bisphosphonates (BPs) are used for treatment of various benign and malignant medical conditions. Medications-related osteonecrosis of the jaws (MRONJ) is a very serious complication of prolonged therapy with BPs. This study aimed to assess the level of knowledge among dental professionals in Saudi Arabia regarding MRONJ. Materials and Me...
Preprint
Full-text available
Background A number of epidemiological studies have suggested a positive association between periodontal diseases and oro-digestive cancers, including liver cancer. The present systematic review aimed to assess the potential association between periodontitis and/or tooth loss and the risk of liver cancer.Methods A comprehensive search of PubMed, Sc...
Article
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Background: Education related to health sciences appears to be the most stressful. Aims: The aim of this study was to evaluate the perceived stress among Yemeni dental students and to explore the effect of the war circumstances on the perceived stress. Methods: This cross-sectional study targeted all dental students at the two main dental facu...
Article
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Background: Dental students are future dentists. Continuous assessment and improving of the educational curricula will ensure excellent academic performance of dental students and thus providing the community with the best treatment modalities. The aim of this study was to evaluate the root canal filling quality performed in extracted teeth by pre...
Article
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Color change of prosthodontic materials may result in patient dissatisfaction and additional expenses for replacement. This study aimed to determine the effect of daily-consumed beverages (tea, coffee, and Pepsi®) on the color stability of two types of heat-cured acrylic resin denture base materials (Hiflex-H and DPI® Heat Cure). A total of 136 dis...
Article
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Background: Self-perceived health is an essential measure of health status and even a paramount predictor of mortality. So long as it is said that oral health (OH) and general health (GH) are mirrors to each other. This study sought to determine how Yemeni adults rate their OH and GH, whether such a self-rating influenced by some potential risk fa...
Article
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Objective: Congenitally missing maxillary lateral incisors present challenges to dentists in terms of treatment planning and can negatively affect aesthetics and function in patients. The aim of the present study was to determine the preferred treatment approach of dentists with different specialties. Materials and Methods: We carried out a descrip...
Article
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Objective: The present study aimed to explore the existence of golden proportion (GP) between the widths of maxillary anterior teeth and golden standard (GS) for width to height ratio of maxillary central incisor in individuals with attractive and non-attractive smiles. Materials and Methods: A total of 82 females were recruited and divided into 2...
Article
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Objectives The present systematic review assessed the efficacy of aloe vera mouthrinse on plaque and gingival inflammation. Methods A comprehensive search of PubMed, Embase, Scopus, and Web of Science was conducted in February 2018 to identify all relevant studies using the following keywords: aloe vera, gingivitis, gingival inflammation, plaque‐i...
Article
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Purpose The aim of this study was to translate and validate an Arabic version of the 5-item Oral Health Impact Profile (OHIP). Methods A total of 320 subjects (aged 18 years and above) were consecutively recruited from dental clinics. The self-administered OHIP5-Ar was distributed and the data were collected and analyzed. The dimensionality of the...
Article
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Background: The assessment of oral heath related quality of life (OHRQoL) for complete denture wearers according to a participant's subjective perception may provide an indication of the adaptive capacity of the individual. The aim of this study was to compare and assess the validation of two quality of life measures, the Oral Health Impact Profil...
Article
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Objectives: To investigate the quality of communication between dentists and dental laboratory technicians in private dental laboratories in Khartoum State related to fabrication of removable partial dentures. Methods: This was a descriptive cross-sectional study, in which dental technicians were interviewed regarding the quality of instructions...
Article
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Introduction: Publication trends of Prosthodontic literature in the PubMed-indexed journals in the year 2016 was studied to assess the number of authors, country affiliation of principal author, international collaboration in authorship, type of studies, major field of study. The bibliometric study helps to determine the scientific growth and devel...
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p>Pertinent literature search about changes or effects of prosthodontic treatment on nutritional status was performed. The articles were electronically and hand searched in all available journals including research works, reviews, randomized controlled trials and systematic reviews. The information were obtained to answer the question whether dentur...
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Aim This study aimed at evaluating the perceived stress and its sources among undergraduate dental students at Jazan University, Saudi Arabia. Materials and Methods In this cross-sectional study, the data were collected using the DES questionnaire. The overall score of stress and scores by individual domains were described and analyzed by differen...
Article
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Background: Maxillary defects predispose patients to different undesirable effects. The aim of this study was to assess the quality of life (QoL) of patients with maxillary defects (acquired/congenital) wearing obturators. Methods: The study comprised 30 patients aged between 16 and 78 years. Interviews were conducted to collect information pert...
Article
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Statement of problem: Masticatory performance is an important and complex multifactorial process in clinical practice. An exploration of the relationships and effects of the associated factors is lacking. Purpose: This clinical survey compared masticatory efficiency (mixing index) with perceived masticatory ability (masticatory index) among comp...
Article
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This study investigated the effect of 1% and 5.25% of sodium hypochlorite (NaOCl) as spray and immersion solutions on the dimensional accuracy of an irreversible hydrocolloid impression material. Impressions of master models were taken using irreversible hydrocolloid impression material, which was then treated with NaOCl 1% or 5.25% solution, eithe...
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Objective: To develop the Croatian version of the 41-item Dental Environment Stress questionnaire (DES) for stress assessment of dental students in both, preclinical and clinical years of study and to test its psychometric properties in Croatian dental student population. Materials and Methods: The English version of the 41-Item DES questionnaire w...