Clinical trials

Mandibular fractures represent a significant portion of maxillofacial trauma, primarily resulting from motor vehicle accidents, interpersonal violence, and sports-related injuries. Achieving successful treatment requires accurate anatomical reduction, stable internal fixation, and restoration of pre-traumatic occlusion and masticatory function . Open reduction and internal fixation (ORIF) using titanium miniplates has long served as the gold standard for mandibular fracture management due to their superior mechanical strength, excellent biocompatibility, and proven structural reliability . Despite their widespread clinical adoption, conventional titanium plates present notable drawbacks. Their high elastic modulus compared to human cortical bone often leads to stress shielding, which can impede normal bone healing and cause local osteopenia .Additionally, titanium hardware can cause temperature sensitivity, scatter artifacts on computed tomography (CT) and magnetic resonance imaging (MRI) scans, and may necessitate secondary surgical removal due to palpability or infection . To address these limitations, Polyether Ether Ketone (PEEK)-a high-performance thermoplastic polymer has emerged as a promising alternative biomaterial in maxillofacial surgery. PEEK exhibits an elastic modulus close to natural bone, thereby reducing stress shielding and promoting physiological strain distribution during fracture healing. Furthermore, PEEK is radiolucent, non-magnetic, and chemically inert, allowing artifact-free postoperative radiologic assessment . With advancements in digital dentistry, computer-aided design and computer-aided manufacturing (CAD/CAM) alongside 3D printing have enabled the fabrication of patient-specific, custom-made implants. Custom-made titanium and PEEK plates eliminate the need for intraoperative manual bending, significantly reducing surgical time, improving contour accuracy, and enhancing mechanical stability across the fracture site . While custom-made titanium provides rigid fixation suitable for high-load zones, custom-made PEEK implants offer an biomechanically compatible and artifact-free alternative. However, direct comparative clinical and biomechanical evaluations between custom-made titanium and custom-made PEEK plates for mandibular fracture fixation remain limited. Therefore, this study aimed to evaluate and compare the clinical outcome, stability, and surgical efficiency of custom-made titanium versus custom-made PEEK plates in the fixation of mandibular fractures.

Background: Carbetocin is an established single-dose uterotonic agent for postpartum hemorrhage prophylaxis at elective cesarean delivery. Despite its proven efficacy, many clinicians routinely add a supplemental oxytocin infusion following carbetocin administration without evidence-based justification. Concurrent oxytocin receptor stimulation may be redundant, counterproductive through receptor desensitization, or incrementally beneficial - a mechanistic uncertainty that remains unresolved in the published literature. Objectives: To determine whether carbetocin monotherapy (100 micrograms IV bolus plus placebo infusion) is non-inferior to carbetocin plus supplemental oxytocin infusion (10 IU over 4 hours) in preventing the need for additional uterotonic agents within 24 hours of elective cesarean delivery. Study Design: Prospective, randomized, double-blind, placebo-controlled, non-inferiority trial with an integrated pilot phase. Phase 1 (Pilot, n=60) establishes local feasibility and event rate. Phase 2 (Full trial, n=332) provides the definitive non-inferiority analysis. Participants: Women aged 18-45 years undergoing elective cesarean delivery under spinal anesthesia at Qassim University Medical City, singleton pregnancy at or beyond 37 weeks, ASA physical status II, preoperative hemoglobin 9 g/dL or more. Interventions: Group C (Monotherapy): Carbetocin 100 micrograms IV bolus plus placebo saline infusion 500 mL over 4 hours. Group C+O (Combination): Carbetocin 100 micrograms IV bolus plus oxytocin 10 IU in 500 mL saline over 4 hours. Primary Outcome: Proportion of patients requiring at least one additional uterotonic agent within 24 hours of delivery. Secondary Outcomes: Quantitative intraoperative blood loss by gravimetric measurement; total 24-hour blood loss; actual blood loss by Gross formula; hemoglobin and hematocrit changes; uterine tone scores by verbal numerical rating scale (0-10) at 2, 5, and 10 minutes; incidence of postpartum hemorrhage; blood transfusion requirement; hemodynamic profiles; adverse effects. Sample Size: 332 patients (166 per group), non-inferiority margin 10 percentage points, one-sided alpha 0.025, 80% power, estimated baseline event rate 10%, with 15% dropout allowance.

This crossover clinical trial aims to compare the accuracy of conventional splinted open-tray implant impressions with intraoral digital scanning using a calibrated framework in completely edentulous patients rehabilitated with full-arch implant-supported prostheses. Accurate transfer of implant positions is essential for achieving a passive fit of the prosthetic framework and minimizing biological and mechanical complications. Twenty healthy completely edentulous patients requiring full-arch implant rehabilitation will be enrolled. Each participant will undergo both conventional and digital impression techniques following implant placement, allowing direct within-subject comparison. The conventional technique consists of a verified splinted open-tray impression, while the digital technique uses an intraoral scanner in combination with a calibrated stock framework. The accuracy of the two impression techniques will be evaluated by superimposing the resulting STL files using Geomagic Control X software. Linear deviations in the x-, y-, and z-axes, angular deviations, and global deviations will be measured and compared. The findings of this study are expected to provide clinical evidence regarding the accuracy of calibrated framework-assisted intraoral scanning compared with the conventional impression technique for full-arch implant rehabilitation.

This study aims to evaluate the effect of web-based health education on information, motivation, behavioral skills related to human papilloma virus vaccination among female University students Research hypothesis * Female University students who receive web based education are expected to improve information about human papilloma virus vaccination more than control group. * Female University students who receive web based education are expected to exhibit greater motivation compared with the control group. * Female University students who receive web based education are expected to demonstrate greater behavioral skills compared with the control group.

The purpose of this study is to evaluate and compare the clinical and radiographic outcomes of using photofunctionalized (UV-treated) dental implants with or without the application of melatonin hormone in the posterior maxilla (upper back jaw). The posterior maxilla is known to have lower bone quality, which can negatively affect the primary and secondary stability of dental implants,. UV photofunctionalization is a method that modifies the titanium surface of the implant, changing it from hydrophobic (water-repelling) to superhydrophilic (water-attracting). This enhancement aims to accelerate protein adsorption and promote bone-building cells (osteoblasts). On the other hand, melatonin acts as an anti-inflammatory and antioxidant agent that stimulates bone formation and reduces bone resorption. A total of 21 dental implants will be placed in patients requiring tooth replacement in the posterior maxilla. The implants will be divided into three main approaches: one using UV-treated implants alone, and the other combining UV-treated implants with melatonin. and one using conventional implant Patients will be followed up clinically and radiographically to assess implant stability, bone healing, and overall implant success over time.

This study aims to investigate the prevalence of refusal of participation in surgical clinical trials in our community. Furthermore, it aims to highlight potential factors contributing to refusal of participation. Finally, it aims to know how to engage patients and their representatives in future surgical clinical trials.

This randomized controlled clinical trial aims to compare the effect of topical oxygen therapy (Blue®M Gel) and hyaluronic acid on the stability of immediately loaded dental implants placed in the posterior maxilla. Twenty-four dental implants will be placed in eligible patients and randomly assigned to one of three groups: control implants without surface treatment, implants immersed in Blue®M Gel before placement, and implants immersed in hyaluronic acid gel before placement. Implant stability will be evaluated using resonance frequency analysis immediately after implant placement and during follow-up. Clinical healing outcomes, including pain, edema, soft tissue inflammation, wound dehiscence, and signs of infection, will also be assessed. Radiographic evaluation of crestal bone level changes will be performed using cone beam computed tomography (CBCT). The study seeks to determine whether topical oxygen therapy or hyaluronic acid can improve implant stability and peri-implant healing in the posterior maxilla.

This study assess the ability of Asiaticoside based Intracanal medication compared to the commonly used Intracanal medicament ( calcium hydroxide Ca(OH) 2) on the outcome of the revascularization process in immature permanent teeth with pulp necrosis

Neonates, particularly those hospitalized in neonatal intensive care units (NICUs), are subjected to numerous painful procedures essential for their diagnosis and monitoring. Heel lance, performed for routine blood sampling, stands as one of the most frequently encountered painful experiences for these vulnerable infants, as robust neurobiological evidence confirms that even preterm infants possess the anatomical and functional capacity to perceive pain, manifesting measurable physiological, hormonal, and behavioral responses. The daily average of acute painful events can reach up to 10-15 procedures in the NICU, and repeated exposure to inadequately managed procedural pain has been associated with immediate physiological instability as well as longer-term alterations in stress regulation, somatosensory processing, and neurodevelopmental outcomes. These vulnerabilities are further compounded in preterm and low birth weight infants who require prolonged hospitalization and specialized care.

This randomized clinical trial will evaluate the effect of using an enamel matrix derivative during immediate dental implant placement in the mandibular molar region. Patients who require extraction of a non-restorable mandibular molar and immediate implant placement will be randomly assigned to receive an implant placed with enamel matrix derivative or without enamel matrix derivative. Clinical and radiographic outcomes, including implant stability and peri-implant bone changes, will be assessed over a follow-up period of six months. The results of this study aim to determine whether the use of enamel matrix derivative improves osseointegration and healing around immediate dental implants.

This study aims to compare and evaluate the safety and efficacy of ultrasound guided retrolaminar block versus transverse abdominis plane block in laparoscopic upper abdominal surgeries. Both RLB and TAP blockade are hypothesized to reduce analgesic consumption, manage pain effectively and minimize side effects but their comparative effectiveness has not yet to be thoroughly explored.

This crossover clinical trial aims to compare the microbial colonization associated with double-structure bar implant-supported mandibular overdentures retained by either MK1 or conventional clip attachments. Seven completely edentulous patients will receive both attachment systems sequentially, allowing each participant to serve as their own control. Microbial samples will be collected from the intaglio surface of the prosthesis and peri-implant areas at different follow-up intervals to assess the prevalence of oral microorganisms. The findings will help determine whether the type of attachment influences microbial accumulation and may contribute to improved maintenance and long-term success of implant-supported overdentures.

Real-world data from a single-center experience evaluating patients with hepatocellular carcinoma (HCC) receiving systemic therapies

Treatment options of mandibular fractures can be accomplished with either closed treatment or open reduction internal fixation (ORIF). Maxillomandibular fixation (MMF) refers to any method used to secure the maxilla and mandible in proper dental occlusion. MMF is a standard component of mandibular fracture management essential for closed treatment and commonly used du ring ORIF. Its three main principles are to establish occlusion, provide stability, and immobilize the jaws.

This randomized clinical trial aims to compare two membrane materials used in Vestibular Socket Therapy (VST) technique during immediate implant placement in Type II extraction sockets in the esthetic zone. A total of 30 patients will be randomly allocated to receive VST using either a biodegradable magnesium membrane or a cortical lamina membrane. Both groups will receive immediate implant placement and xenogeneic bone graft. The study will compare changes in facial bone dimensions, soft tissue volume, implant stability, pink esthetic score, patient satisfaction, surgical time, and postoperative complications over a 6-month follow-up period.

This randomized crossover clinical trial compares the passivity of fit of complete-arch mandibular implant-supported frameworks fabricated using three impression techniques: a non-calibrated splinted digital scan body system (IO-Connect), a Reverse Scan Body (RSB) digital impression technique, and a conventional splinted open-tray impression technique. Eight completely edentulous patients each receiving four mandibular implants will be included. Passivity of fit will be evaluated clinically using the Sheffield one-screw test and radiographically using intraoral periapical radiographs obtained with the parallel technique.

This randomized controlled clinical trial aims to evaluate the effect of posterior disarticulatory resin bite turbos on the rate of maxillary expansion using a HYRAX expander in early adolescent patients. Participants will be randomly assigned to receive either maxillary expansion with posterior resin bite turbos or conventional expansion without bite turbos. The study will assess and compare the rate and effectiveness of maxillary expansion between the two groups during the treatment period. Clinical measurements will be recorded to evaluate skeletal and dental changes associated with the intervention.

The main objective of the current study is to clinically and biochemically evaluate the effectiveness of epigallocatechin-3-gallate-loaded chitosan nanoparticulate gel as a local drug delivery system, when used in conjunction with mechanical debridement, for treating periodontal pockets in patients with stage II periodontitis. The primary endpoint will be the assessment of pocket depth reduction after 3 months of therapy, whereas the secondary endpoints include the changes in clinical attachment gain, bleeding on probing, plaque and gingival indices and gingival crevicular fluid level of tumor necrosis factor alpha (TNF-α).

Sixty patients will be selected from the outpatient clinic in the Oral Medicine and Periodontology Department, Faculty of Dentistry, Mansoura University, Egypt, according to preoperative clinical and radiographic data that will be used to evaluate the bone destruction pattern.

Burn injuries are very painful for children, especially during dressing changes when the wound is cleaned and re-bandaged. This procedure, while necessary, can cause pain, fear, and distress that may make children afraid of future treatments. Virtual reality (VR) is a technology that uses a headset to show an immersive, interactive 3D world. It can distract children from painful medical procedures. This study aims to find out if using VR during burn dressing changes can reduce pain, fear, and behavioral distress in children aged 6 to 12 years. Half of the children will receive standard burn care plus VR distraction during their dressing change. The other half will receive standard care only. The study will take place at the Burns and Plastic Surgery Center, Mansoura University, Egypt. Children will be recruited from both inpatient wards and outpatient clinics. Pain will be measured using a number scale, fear using a faces scale, and distress will be observed throughout the procedure. It is expected that children who use VR will report less pain, show less fear, and display less distress during their dressing changes compared to children who receive standard care alone.

Thyroiditis includes inflammatory thyroid disorders such as Hashimoto's thyroiditis and subacute thyroiditis. These conditions may cause thyroid pain, neck tenderness, elevated inflammatory markers, thyroid dysfunction, fatigue, and recurrence. Current management includes observation, symptomatic treatment, nonsteroidal anti-inflammatory drugs, and corticosteroids. Although corticosteroids may be effective, relapse after tapering and treatment-related adverse effects remain limitations. Colchicine is hypothesized to reduce inflammatory activity and may improve biochemical and clinical recovery. This study will evaluate the efficacy and safety of low-dose colchicine compared with corticosteroid therapy and supportive care in adults with autoimmune or subacute thyroiditis.

This study aims to evaluate the impact of using a mobile application-based medication reminder on medication adherence among patients diagnosed with chronic diseases and memory impairment. Adherence to prescribed therapy is a significant challenge for this patient population, often leading to poor health outcomes and increased healthcare costs. From a nursing leadership perspective, innovative digital solutions can play a crucial role in supporting patient self-management. Using a quasi-experimental design, the study will investigate whether a customized mobile reminder system can effectively improve adherence rates and support patients in managing their therapeutic regimens.

This randomized controlled clinical trial aims to evaluate and compare the remineralizing effect of nano-eggshell varnish, CPP-ACP paste (GC Tooth Mousse), and sodium fluoride varnish on initial enamel caries among adolescents aged 15-20 years. Participants will be randomly allocated into three groups. Remineralization and caries activity will be assessed using DIAGNOdent readings, International Caries Classification and Management System (ICCMS) criteria, and the decayed, missed, and filled surfaces (DMFS) index over a 12-month follow-up period.

The aim of this study is to evaluate the efficacy of hyaluronic acid and I-PRF mixture for intra-articular injection following arthrocentesis in the management of TMJ reducible disc displacement.

This randomized clinical trial aims to evaluate the effect of integrating digital jaw tracking into the workflow for fabrication of full-arch maxillary implant-supported screw-retained restorations. Twenty completely edentulous maxillary patients opposing natural mandibular dentition will be randomly assigned to either a conventional workflow group or a digital jaw-tracking workflow group. The study will compare patient satisfaction and occlusal accuracy between the two groups. Patient satisfaction will be assessed using a visual analogue scale (VAS), while occlusal accuracy will be evaluated using the OccluSense system.