1,720,965 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
COMPARATIVE RADIOLOGICAL STUDY OF BONE DENSITY AND THICKNESS BETWEEN OPEN AND CLOSED REDUCTION OF COMMINUTED MANDIBULAR BONE FRACTURE
Get PDFBackground and Objectives: Mandibular fractures, often caused by trauma, can lead to significant functional and aesthetic impairments, including difficulty chewing and speaking, and facial deformities, especially when comminuted. This study compares bone density and thickness in patients with comminuted mandibular fractures resulting from gunshot wounds, using advanced radiological methods to determine treatment efficacy and inform clinical decisions.
Subjects and Methods: This retrospective study compared the treatment of comminuted mandibular fractures resulting from gunshot wounds at Sana'a Military Hospital. The study included patients who underwent open or closed reduction, and demographic data, injury characteristics, and post-treatment examinations were collected. Bone density and thickness were measured using cone-beam computed tomography (CBCT) or CT scans, and statistical analysis was performed to compare the two groups.
Results: The study included five patients in each group who underwent intermaxillary fixation (IMF) and open reduction internal fixation (ORIF). The age distribution of patients was heterogeneous, with 30% between 22 and 24 years old, 20% between 25 and 27 years old, 30% between 28 and 30 years old, and 20% over 30 years old. Malunion was the most common complication, followed by bone loss in 30% of patients. No significant differences in bone density and thickness were observed between the IMF and ORIF groups at the site of injury.
Conclusion: Ultimately, a patient's previous bone density is the determining factor in determining the appropriate treatment for a jaw fracture and is not a criterion for comparison between IMF and ORIF. Although both treatments have risks and benefits, the success of the outcome depends on the quality of the underlying bone to ensure stable healing.
Peer Review History:
Received 6 August 2025; Reviewed 12 September 2025; Accepted 22 October; Available online 15 November 2025
Academic Editor: Dr. Sally A. El-Zahaby, Pharos University in Alexandria, Egypt, [email protected]
Reviewers:
Dr. Mahmoud S. Abdallah, University of Sadat city, Egypt, [email protected]
Dr. Mohamed Salama, Modern University for Technology & Information, Egypt, [email protected]
IMPACT OF 3D PRINTING IN RECONSTRUCTION OF MAXILLOFACIAL BONE DEFECTS EXPERIMENTAL STUDY IN A MILITARY HOSPITAL IN SANA’A CITY, YEMEN
Get PDFBackground and aims: The study explores the use of PEEK and PMMA as alternatives for 3D reconstruction of orbital bone defects. It aims to evaluate their durability, develop a standardized protocol, and design implant-specific implants using 3D printing technology.
Subjects and methods: A study at the Military Hospital in Sana'a, Yemen, found maxillofacial fractures in six patients who underwent maxillofacial reconstruction using 3D printing technology. The patients had previously undergone unsuccessful traditional treatments. The study involved preoperative assessments, CT scans, and functional evaluations. Custom 3D printed implants were designed using GOM and ATOS, and surgical procedures were performed under general anesthesia.
Results: A group of patients aged 20-43 years, with a mean age of 28.8 years, experienced pain, aesthetic deformity, limited mouth opening, difficulty eating, and bacterial infections. Causes included G.S.I., RTA, bomb explosion, and falls from height. The study found that all patients had unilateral fractures, with 33.3% having segmental fractures, 66.7% having displacement, and 50 having tripod fractures. Debridement operation was performed in all patients, with bone grafting and ORIF performed in 83.3%. Instability, insufficient, and infection were the most common reasons for failure.
Conclusion: This study highlights the potential of 3D printing technology in enhancing the outcomes of maxillofacial bone defect reconstruction by use PEEK and PMMA materials, especially in patients with prior treatment failures.
Peer Review History:
Received 13 December 2024; Reviewed 11 January 2025; Accepted 22 February; Available online 15 March 2025
Academic Editor: Dr. Asia Selman Abdullah, Pharmacy institute, University of Basrah, Iraq, [email protected]
Reviewers:
Dr. Neelam H. Zaidi, Fiji National University, Fiji, [email protected]
Dr. Nicola Micale, University of Messina, Italy, [email protected]
MAXILLOFACIAL FRACTURE TYPE AND THEIR MANAGEMENT IN INDIVIDUALS REFERRED TO THE MILITARY HOSPITAL IN SANA’A CITY, YEMEN
Get PDFBackground and aims: Maxillofacial fractures, injuries to facial bones, are treated based on type and severity, including common types like mandible, maxilla, zygomatic bone, and nose. University hospitals like Military Hospital use advanced surgical techniques and multidisciplinary care to handle complex cases requiring closed reduction or open reduction and internal fixation. This retrospective study aimed to examine the types and treatment of maxillofacial fractures among individuals referred to the Military Hospital in Sana'a, assess associated complications, evaluate recovery experience, and postoperative quality of life.
Materials & methods: The records of 94 patients, ages 8 to 60, who suffered maxillofacial fractures between January 1, 2022, and December 29, 2022, were examined in this retrospective analysis. From the archival records, information about age, gender, the location and cause of the fracture, and the method of treatment was extracted and examined.
Results: The study involved 94 patients aged 8-60, mostly 16-25, with traffic accidents being the most common cause. Fractures were common, with symphysis being the most common type (62.8%), followed by zygomatic (30.9%). Other types included palate, lateral, suspensory, maxillary sinus, and alveolar process fractures. The study revealed that nasal bridge fractures were the most common nasal bone fracture, accounting for 7.4% of cases. Orbital and facial fractures accounted for 12.8% and 5.3%, respectively.
Conclusions: Traffic accidents were the most common cause of fractures, and the most common type of fracture was a symphysis fracture, followed by a zygomatic fracture. Other types included fractures of the palate, lateral, suspensory, maxillary sinus, and alveolar process.
Peer Review History:
Received 2 June 2025; Reviewed 11 July 2025; Accepted 17 August; Available online 15 September 2025
Academic Editor: Prof. Dr. Gorkem Dulger, Duzce University, Turkey, [email protected]
Reviewers:
Dr. Andrzej Szymański, Poznan University of Technology, Poland, [email protected]
Dr. Anthony C. C. Egbuonu, Michael Okpara University of Agriculture, Nigeria, [email protected]
EVALUATION OF NEUROSENSORY RECOVERY IN INFRAORBITAL AND INFERIOR ALVEOLAR NERVE IMPAIRMENTS AFTER MAXILLOFACIAL FRACTURES: A SYSTEMATIC REVIEW
Get PDFBackground and aims: FSR has a substantial impact on patients' quality of life, but it is yet unknown how age, gender, repair timing, and surgical methods affect this. Optimizing surgical methods and enhancing clinical results depend on closing this knowledge gap. By looking at these factors, this study aims to offer evidence-based recommendations to direct patient treatment and improve recuperation techniques. Assessing the results of sensory neurological recovery in individuals with impairments in the inferior alveolar nerve (IAN) and infraorbital nerve (ION) after mandibular and zygomatico-maxillary complex (ZMC) fractures was the goal of this investigation.
Methods: The PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) criteria were followed in conducting a systematic review. Age, sex, time from damage to repair, and repair method were prognostic factors. All reviews, animal studies, research papers published before 2014, and those without full-text access were excluded. On February 25, 2025, electronic searches were conducted in the Cochrane Library, PubMed, and Scopus databases.
Results: The analysis included a comprehensive dataset of 3491 patients, with a mean age of 34.25 years. The primary causes of fractures were traffic accidents (58.65 %), falls (20.56%), and assaults (20.79%). Treatment methods included open reduction (72.70%), closed reduction (7.27%), and conservative treatment (20.03%). Recovery outcomes indicated an overall recovery rate of 73.23%, with a mean follow-up duration of 186.5 days. The results were equal in both sexes, with higher rates in open reduction and early inferior alveolar nerve (IAN) repair.
Conclusions: Recovery outcomes indicated a high recovery rate, equally observed in both sexes, with higher rates for open reduction and early inferior alveolar nerve repair. The study emphasizes the critical role of treatment modalities and timing in influencing neurosensory recovery and calls for the adoption of standardized treatment protocols and expanded follow-up care. To validate these results and enhance clinical guidelines, more excellent research is required.
Peer Review History:
Received 11 June 2025; Reviewed 14 July 2025; Accepted 19 August; Available online 15 September 2025
Academic Editor: Dr. Iman Muhammad Higazy, National Research Center, Egypt, [email protected]
Reviewers:
Dr. Branislav Ranković, University of Kragujevac, Serbia, [email protected]
Dr. Cecilia Nwadiuto Amadi, University of Port Harcourt, Port Harcourt Rivers State, Nigeria, [email protected]
MAXILLOFACIAL FRACTURES AT THE TIME OF HARDWARE REMOVAL: AETIOLOGY, SURGICAL THERAPY, IDENTIFICATION OF POSTOPERATIVE INFECTIONS, AND ANTIBIOTIC PATTERN OF ISOLATES
Get PDFBackground and Aims: A mandibular fracture, or jaw fracture, typically occurs at two sites in about 60% of cases, potentially limiting mouth opening and causing gum bleeding and misalignment of teeth. This study aimed to identify the bacterial causes of postoperative infections, the aetiology of fractures, surgical treatment, and the antibiotic resistance profile of bacteria from patients with maxillofacial fractures at the Military Hospital in Sana'a, Yemen.
Materials and Methods: The Department of Oral and Maxillofacial Surgery at the Military Hospital in Sana'a, Yemen, treated thirty patients with maxillofacial fractures from January to December 2024. They used fracture fixation hardware and conducted follow-ups six months post-surgery. The study assessed the incidence of postoperative bacterial infections at surgical sites after hardware removal, employing standard microbiological techniques for isolate identification and the Kirby-Bauer method for antibiotic susceptibility testing, alongside collecting clinical and demographic data from participants.
Results: Most fractures were open compound fractures (56.7%), all of which were mandibular fractures. For 60% of patients, open reduction internal fixation (ORIF) was the most frequently used surgical procedure. Staphylococcus aureus accounted for 27 (90%) of all isolates from surgical sites, with Klebsiella pneumoniae coming in second at 30%. Three instances (10%) had no bacterial growth. Amoxicillin, augmentin, aztreonam, cefotaxime, cefoxitin, ceftazidime, piperacillin, ceftriaxone, and doxycycline did not work at all against isolates of S. aureus.
Conclusion: According to the survey, individuals aged 20 to 24 represented 56.7% of cases, primarily due to gunshot wounds. The bacterium S. aureus, noted for its significant multidrug resistance, was the most commonly isolated pathogen. Vancomycin emerged as the most effective treatment for Staphylococcus aureus infections.
Peer Review History:
Received 5 October 2025; Reviewed 9 November 2025; Accepted 17 December; Available online 15 January 2026
Academic Editor: Dr. Ahmad Najib, Universitas Muslim Indonesia, Indonesia, [email protected]
Reviewers:
Dr. Dina Abd Elfattah Eldakhs, Pharos university (PUA), Egypt, [email protected]
Ahmed Tagelsir Mohamed Ali, National University, Sudan, [email protected]
SUCCESSFUL ANTERIOR ILIAC CREST BONE GRAFTING FOR MANDIBULAR DEFECT RECONSTRUCTION: EVALUATION AND OUTCOMES USING NVBG TECHNIQUE IN YEMEN
Get PDFBackground and Aims: Bone grafting from the anterior iliac crest is a common and effective method for reconstructing large mandibular defects, as it provides a good source of cortical and cancellous bone. The anterior iliac crest is a preferred donor site due to the large amount of bone available, its anatomical similarity to the mandible, and the possibility of performing a two-team procedure, which reduces overall surgical time. However, potential complications at the donor site include pain, sensory changes, and gait disturbance. This study aimed to evaluate data from 11 patients undergoing mandibular reconstruction using the NVBG technique at our center.
Materials and Methods: There were eleven individuals with mandibular reconstruction. Continuity defect and non-continuity defect patients were separated. Factors influencing success were examined, including immediate repair, smoking habit, medical comorbidities, defect site and size, surgical technique, and use of maxilla-mandibular fixation. Success was defined as the preservation of the bone graft for non-continuity defects (NCD) and the continuity and stability of the bone for continuity defects (CD), as well as the absence of infection at the most recent clinical and radiographic assessment. There were two categories for complications: minor and significant.
Results: Reconstruction was successful in 12 procedures out of 13 procedures. Analyses showed that the size of the defect was strongly associated with failure. Three patients experienced major complications such as bacterial infection and non-union, and eight experienced minor complications.
Conclusion: Non-vascularized iliac crest bone grafts achieve high success in restoring continuity of the mandible in fractures caused by gunshots, bomb explosions and should be considered the first choice for defects less than 6 cm in diameter. No defects larger than 5.5 cm were recorded in current study.
Peer Review History:
Received 1 October 2025; Reviewed 5 November 2025; Accepted 11 December; Available online 15 January 2026
Academic Editor: Dr. Asia Selman Abdullah, Pharmacy institute, University of Basrah, Iraq, [email protected]
Reviewers:
Dr. Tamer Elhabibi, Suez Canal University, Egypt, [email protected]
Dr. Vanina Doris Edo’o, University of Yaounde I, Yaounde, Cameroun, [email protected]
- …
