Yehia Ahmed Salah El-Mahallawy
@alexu.edu.eg
Scopus Publications
- Roadmap of computer-guided bi-axial alveolar distraction osteogenesis in the posterior mandible: neurosensory safety of double scan virtual protocol
Amany M. Alryess, Lydia N. Melek, Yehia El-Mahallawy
BMC Oral Health, 2026
Objective The study aims to assess the applicability and safety of using a fully digital workflow for the application of bi-axial alveolar distraction osteogenesis in the posterior mandibular region. Materials and methods This study included 7 patients with vertically deficient posterior mandible managed with the utilization of a bi-axial distractor and the implementation of a double scan computer-guided virtual planning protocol. The neurosensory safety of the procedure was assessed using an inferior alveolar nerve conduction test. Radiographic assessment was conducted for vertical bone gain, degree of alveolar segment tilt, bone density, and crown to available bone for implantation ratio appraisal. Results Full neurosensory recovery was documented for all patients one month after the activation period. Vertical bone gain reported a statistically significant difference across the radiographic follow-up ( P = 0.001). The mean bone density showed a statistically significant difference throughout the study period ( P = 0.001) while the degree of tilt of the distracted segment showed insignificant differences ( P = 0.072). Crown-to-available bone for implantation ratio showed a statistically significant change post-distraction ( P = 0.018). Conclusion Virtual planning and computer-guided workflow for the application of vector-dictating distraction osteogenesis in the posterior mandible showed a predictable application, ease of operation execution, neurosensory safety, and maintenance of the transport segment buccolingual orientation. Trial registration Trial was registered at clinicaltrials.gov [NCT05602909/ 2022-10-14]. - Three-dimensional Interlocking versus conventional miniplates for mandibular fractures fixation near the mental foramen: a split-mouth randomized clinical trial
Ibrahim Mohamed Abdelhamed, Ahmed Ossama Sweedan, Reem M. Ismail, Yehia El-Mahallawy
BMC Oral Health, 2026 - Impact of three miniplate configurations on mental nerve integrity in parasymphyseal mandibular fractures: a blinded randomized trial
Reem M. Ismail, Ibrahim Mohamed Abdelhamed, Wafaa Samir, Amany M. Alryess, Yehia El-Mahallawy
BMC Oral Health, 2026
Objectives To assess the mental nerve’s functional integrity after parasymphyseal mandibular fracture fixation using three different miniplates configurations. Methodology A total of 36 patients with unilateral parasymphyseal fractures were included in the study. Patients were randomly allocated into three groups based on the fixation modality configuration. Clinical evaluations were carried out in conjunction with radiographic assessments of mean bone density at the fracture line. Electrophysiological objective nerve testing was conducted 1 month postoperatively to assess the amplitude, onset latency, and conduction velocity of the mental nerve. Result Physiological nerve testing intergroup analysis demonstrated no statistically significant differences in latency or amplitude, while conduction velocity showed a trend toward intergroup variation without reaching statistical significance ( P = 0.072). Comparing the degree of agreement of nerve conduction parameters between the affected ipsilateral and healthy contralateral sides reported high levels of ICCs for all 3 miniplates configurations. Radiographic analysis revealed significantly greater bone density at the fracture site in the 3D-Interlocking group compared with twin fork and conventional miniplates ( P < 0.001). Conclusion Fixation of parasymphyseal mandibular fractures using 3D-Interlocking or Twin-Fork miniplates yielded a slightly enhanced mental nerve conduction profile and integrity preservation when compared to the conventional miniplate configuration. Furthermore, the 3D-Interlocking plate demonstrated improved stability and healing of the fracture line. These findings support the use of 3D-Interlocking or Twin-Fork miniplates as preferable alternatives to conventional miniplates in the mental foramen region. Trial Registration Trial was retrospectively registered at clinicaltrials.gov [NCT07058597/ 2025-07-01]. - Effect of diode laser biostimulation on implant stability, post-surgical inflammation, and bone healing in immediate implant in the maxillary premolars. A randomized double-blind trial
Basma Ashraf Kassem, Saeeda Mahmoud Osman, Yehia El-Mahallawy
Clinical Oral Investigations, 2026 - Prevalence and location of posterior superior alveolar artery in Lebanese population. A retrospective tomography study
Mohammad Adel Adel Raoof, Youssof Walid Abo Merhi, Mostafa Marwan Hammoud, Yehia El-Mahallawy, May Adham, et al.
Saudi Dental Journal, 2026 - Evaluation of computer-guided visco-supplementation in the management of internal derangement of temporomandibular joint: a randomized controlled clinical trial
Baraa Sami Kamal Atmeh, Riham Mostafa El Dibany, Yehia El-Mahallawy
Oral Surgery Oral Medicine Oral Pathology and Oral Radiology, 2025 - Automatic detection of temporomandibular joint osteoarthritis radiographic features using deep learning artificial intelligence. A Diagnostic accuracy study
Louloua Mourad, Nayer Aboelsaad, Wael M. Talaat, Nada M.H. Fahmy, Hams H. Abdelrahman, et al.
Journal of Stomatology Oral and Maxillofacial Surgery, 2025 - Does strontium coated titanium implants enhance the osseointegration in animal models under osteoporotic condition? A systematic review and meta-analysis
Osama Sayed, Mohamed Mahmoud Abdalla, Ayman Elsayed, Yehia El-Mahallawy, Haytham Al-Mahalawy
Bdj Open, 2024
Purpose The aim of this study was to systematically review the literature to address the effect of strontium modified titanium implants on the osseointegration in the presence of osteoporotic conditions through animal models. Materials and methods The databases (PubMed, Scopus, Web of Science, and EBSCO) were searched electronically, and manual searches were performed till December 2022 to identify preclinical studies on the osseointegration of strontium coated titanium implants in animals with induced osteoporotic conditions. The primary outcomes were the bone-implant contact percentage (BIC%), bone area (BA) from the histomorphometric analysis, and the osseointegration parameters from biomechanical tests; the secondary outcomes were the osseointegration parameters from the micro computed tomography. Results Nineteen articles were included for the quantitative analysis on basis of the inclusion criteria. The results revealed that Sr-modified implants showed a significant 19.05% increase in BIC, and 15.01% increase in BA. The results of biomechanical tests indicated a significant effect in favor of Sr-coated implants. Furthermore, Results of the secondary outcomes supported the significant advantages of Sr-coated implants over the un-coated implants. The overall, systematic analysis of implants osteointegration parameters proved a significant increase in favor of Sr-coated titanium implants (P < 0.01). Conclusion The present results provide evidence that strontium-coated titanium implants enhanced the osseointegration in animal models under osteoporotic condition as this surface modification techniques have improved the mechanical and biological properties of the titanium implants. - AI AND RADIOLOGIST ASSESSMENTS ON THE PREVALENCE OF TMJ OSTEOARTHRITIS USING RADIOGRAPHIC IMAGES: A COMPARATIVE STUDY
Louloua Z. MOURAD, Nayer ABO EL SAAD, Yehia EL MAHALLAWY
International Arab Journal of Dentistry, 2024
Objectives: This study aims to address the significant discomfort and functional impairment associated with temporomandibular joint osteoarthritis (TMJ OA), which negatively impacts the quality of life. It emphasizes the importance of prompt diagnosis and explores the potential of an Artificial Intelligence (AI) system to enhance TMJ OA diagnosis.Methods: The prevalence of TMJ OA was evaluated using 3 diagnostic tools: the gold standard, the AI model, and an examiner. In total, 132 patients who performed 190 cone-beam computed tomography (CBCT) images were included.Results: The prevalence of TMJ OA was 62.11% using the gold standard, 63.68% using the AI model, and 58.42% when assessed by the examiner. No gender variation in TMJ OA diagnosis was reported (p-value>0.05). Age variations were reported with the gold standard and the examiner diagnosis. When compared to the gold standard, the AI model had remarkable sensitivity (97.46%) and specificity (91.67%).Conclusions: The AI model shows promise in enhancing the accuracy of TMJ OA diagnosis, offering potential benefits for early detection and improved patient outcomes. - Evaluation of the resection plane three-dimensional positional accuracy using a resection guide directional guidance slot; a randomized clinical trial
Yehia El-Mahallawy, Noha Y. Dessoky, Hams H. Abdelrahman, Haytham Al-Mahalawy
BMC Oral Health, 2024
Aim The study was performed to compare the mandibular resection guide with a directional guidance slot with the conventional guide regarding three-dimensional positional accuracy. Materials and methods Twenty-six patients with lateral segmental mandibular defects were selected, and randomly allocated into two groups. All defects were managed with preoperative virtual surgical planning. Resection in the test group was conducted using a resection guide with a directional guidance slot, while a conventional resection guide design was utilized in the control group. The linear and angular deviation of the osteotomy planes was analyzed for both groups, along with the accuracy of the insertion of the reconstruction bone block in the resected defect. Data were documented, absolute deviation was calculated, statistical analysis was performed and significance was set at the 5% level. Results The cases conducted with a directional guidance templet reported a statistically significant difference when compared to the conventional edge-cutting guide regarding the linear and angular spatial osteotomy plane position (P < 0.001). The defect span analysis reported excellent levels of agreement in both groups (ICC = 1.00, ICC = 0.995), however, the difference between the groups was statistically significant (P < 0.001). Conclusion The study demonstrated the enhanced positional accuracy of the resection plane and reconstruction block placement when a directional slot is incorporated in the computer-generated resection guide. - Accuracy of virtual surgical planning in mandibular reconstruction: application of a standard and reliable postoperative evaluation methodology
Yehia El-Mahallawy, Hams H. Abdelrahman, Haytham Al-Mahalawy
BMC Oral Health, 2023 - Bilateral collagenous fibroma of the hard palate: a case report and review of the literature
Hagar A. El-naggar, Yehia A. El-Mahallawy, Mohamed I. Harby, Nourhan A. Abou Madawi
Journal of Medical Case Reports, 2023 - Articaine versus Lidocaine in only buccal infiltration anesthesia for the extraction of mandibular anterior teeth. A prospective split-mouth randomized-controlled clinical study
Haytham Al-Mahalawy, Yehia El-Mahallawy, Hams H. Abdelrahman, Shaimaa Mohsen Refahee
BMC Oral Health, 2023 - Post-COVID-19 related osteonecrosis of the jaw (PC-RONJ): an alarming morbidity in COVID-19 surviving patients
Haytham Al-Mahalawy, Yehia El-Mahallawy, Noha Y. Dessoky, Sally Ibrahim, Hatem Amer, et al.
BMC Infectious Diseases, 2022 - Pycnodysostosis: a case report and literature review concerning oral and maxillofacial complications and their management
Yehia El-Mahallawy, Ahmed Ossama Sweedan, Haytham Al-Mahalawy
Oral Surgery Oral Medicine Oral Pathology and Oral Radiology, 2021 - Dentists’ practices and patient safety: A cross-sectional study
Haytham Al‐Mahalawy, Yehia El‐Mahallawy, Maha El Tantawi
European Journal of Dental Education, 2020 - The Use of A Solitary Multi-Planer Herbert Cannulated Bone Screw Osteosynthesis for The Treatment of Mandibular Angle Fracture
Yehia El-Mahallawy, Haytham Al-Mahalawy
Journal of Craniofacial Surgery, 2020 - Is nasopalatine nerve block still mandated for the extraction of maxillary anterior teeth?
Haytham A. Al-Mahalawy, Yehia El-Mahallawy
British Dental Journal, 2020 - Evaluation of orbital volume after orbitozygomatic complex fractures fixation: A radiographical study
Yehia A. El-Mahallawy, Haytham A. Al-Mahalawy
Journal of Oral Biology and Craniofacial Research, 2020 - Herbert Cannulated Bone Screw Osteosynthesis in Anterior Mandibular Fracture Treatment: A Comparative Study With Lag Screw and Miniplate
Yehia El-Mahallawy, Haytham Al-Mahalawy
Journal of Oral and Maxillofacial Surgery, 2018
