Clinical Research Directory

Oral Specimen and Data Acquisition Study of Subjects Requiring Third Molar Removal

Background: \- The third molars (wisdom teeth) normally grow in during late adolescence or early adulthood. Many people need or choose to have these teeth removed with oral surgery. Normally, the removed teeth and tissue are thrown away as medical waste. However, oral health researchers want to collect the teeth and tissue for research. They also want to encourage dentists at the National Institutes of Health to improve their skills in oral surgery. This study will collect the teeth and tissue of people who need to have oral surgery to remove their wisdom teeth. Objectives: * To provide continued dental skills training for dentists at the National Institutes of Health. * To collect teeth and tissue samples following wisdom tooth removal surgery. Eligibility: \- Individuals between 16 and 50 who need to have their wisdom teeth removed. Design: * This study will involve a minimum of three visits. There will be a screening visit, a surgery visit, and at least one follow-up visit. * Participants will be screened with a physical exam and medical history. A full dental exam with x-rays will be given to evaluate the need for surgery. * At the second visit, participants will have oral surgery to remove their wisdom teeth. The teeth and tissue removed during the surgery will be collected for study. * Participants will receive drugs to control the pain after surgery. They will also be able to contact a dentist if there are any problems. * Between 7 and 21 days after surgery, participants will have a followup visit to check the healing. If they are having no problems, this will be the last visit. If there are any postsurgery issues, they will be scheduled for additional visits as needed.

Comparison of Clinical Performance of Partial Restorations Fabricated With Three-Dimensional Printer and CAD-CAM

The aim of this clinical study is to compare CAD-CAM and 3D restorations in individuals with two hard tissue losses or restorations in their mouths. The main question it aims to answer is: Is there a difference between CAD-CAM and 3D restorations according to FDI criteria? Researchers will compare participants to see if there is a difference between the two restorations according to FDI criteria. In this split-mouth study, participants will be randomized to receive a CAD-CAM partial restoration on one tooth and a 3D partial restoration on the other tooth.

Oral Health, Dento-facial Condition and OHRQoL in Subjects With Mowat-Wilson Syndrome: an Epidemiologic Study.

Mowat-Wilson Syndrome (MWS) is a rare syndrome characterized by the presence of facial gestalt and delayed psychomotor development, variably associated with intellectual disability, epilepsy, Hirschsprung's disease (HSCR) and multiple congenital malformations. Although there is evidence of the presence of dental and craniofacial anomalies in MWS, little epidemiological data is available to date. The goal of this observational study is to assess oral health and dento-facial phenotype of people affected by Mowat-Wilson Syndrome (MWS). In addition, the Oral Health Related Quality of Life (OHRQoL) will be investigated.

Autogenous Tooth Transplantation With Instrumentally Simulated Open Apex and Platelet-Rich Fibrin

Autogenous tooth transplantation (autotransplantation) represents a biologically valid alternative to implant therapy, particularly in young patients where implant placement is contraindicated due to ongoing skeletal growth. This approach preserves alveolar bone volume, maintains periodontal proprioception, and allows physiological adaptation over time.

Clinical Comparison of Different Flowable Resin Composites

The aim of this study is to evaluate a self-adhesive flowable resin composite, a flowable resin composite with high viscosity and a conventional flowable resin composite in combination with a universal adhesive using two different application modes. All patients will receive at least 4 occlusal restorations. Cavities will be divided into four groups according to restorative systems used: Constic (a self-adhering flowable composite), G-ænial Universal Flo (a highly filled flowable composite), Tetric N-Flow (self-etch) (a conventional flowable composite), Tetrin N-Flow (etch\&rinse).

Comparative Evaluation of an Alkasite-based Restorative Material and Two Different Resin Composites

The clinical performance of an an alkasite-based restorative material and two different resin composites will be evaluated and compared in non-carious cervical lesions. After recruiting participants with at least three non-carious cervical lesions, all restorations will be placed by a single clinician. Lesions will be divided in three groups: an alkasite-based restorative material (Cention N, Ivoclar Vivadent, Schaan, Liechtenstein (CN)), hybrid resin composite (Gradia Direct Anterior, GC, Tokyo, Japan (GD)) and a highly filled flowable resin composite ((G-aenial Universal Flo, GC, Tokyo, Japan (GF)). All restorative procedures will be conducted according to manufacturers' instructions. Restorations will be scored using FDI criteria. Descriptive statistics will be performed using chi-square tests.

Clinical Evaluation of Three Different Universal Adhesives in Non-carious Cervical Lesions

The aim of this randomized, controlled prospective clinical trial is to evaluate and compare the performances of three different universal adhesives using a flowable universal composite resin in the restoration of non-caries cervical lesions over 48-month period.Participants over 18 will be included to the study. Oral hygiene instructions will be given before procedures. All the lesions will be restored by the same clinician who will not participate to the selection of patients for eligibility. Each patient will receive at least three restorations and randomization will be applied using a table of random numbers. All lesions will be cleaned before restoring. Adhesive procedures and restorations will be placed according to manufacturers' recommandation. The flowable universal composite resin will be placed in bulk and light-cured for 40 seconds. The restorations will be contoured and polished with Optidisc discs (Kerr Coorporation, Orange, CA, USA). Patients will be recalled at baseline and will be recalled at control periods after placement.

Accuracy of Immediate Implant Placement Using Robotic System Versus Dynamic Navigation System in Anterior Maxillae: a Random Controlled Clinical Trial

Prosthetic-driven immediate implant placement for optimal aesthetic restoration has been increasing in demand during the last decades but requires higher accuracy. Dynamic navigation has been reported better implant positioning in immediate implant placement compared to free hand procedure. On the basis of dynamic navigation, robotic system uses the robotic arm to replace the manual process of implant bed preparation and implant placement, therefore improving the accuracy of implant placement theoretically. The goal of this randomized controlled trial is to compare the positional implant accuracy, the surgical time, and patient satisfaction between dynamic navigation and robotic assisted immediate implant placement in maxillae. Subjects will be randomized to either group based on the allocation. The accuracy of placement will be assessed evaluating the difference between the planned and the actual position using a follow-up CBCT scan taken at the end of the surgery. Subjects will be followed up for one year to assess both patient reported and professional outcomes.

KAP of Dental Practitioners Regarding CRA

The aim of the study is to evaluate the knowledge, attitude, and practice of a group of dental practitioners from Cairo and Riyadh regarding caries risk assessment and management.