Clinical Research Directory

Mandibular Biological Drilling at Different Speeds for Dental Implant Placement

This randomized controlled clinical trial aims to evaluate the effect of different biological drilling speeds (50, 150, and 300 rpm) during implant osteotomy preparation in the mandible on marginal bone level changes and implant stability. Thirty-nine patients requiring a single dental implant in the mandible will be randomly allocated into three groups according to drilling speed. All implants will be placed using a biological drilling protocol without irrigation. Implant stability will be measured using resonance frequency analysis at implant placement and follow-up visits. Marginal bone levels will be evaluated radiographically using standardized periapical radiographs during the follow-up period up to 12 months. The study aims to determine whether different low-speed drilling protocols influence peri-implant bone remodeling and implant stability.

Comparing Cleaning Tools for Full-Arch Implant-Supported Fixed Prostheses

For patients with complete edentulism, full-arch implant-supported fixed prostheses can effectively restore functions such as mastication, esthetics, and speech. Their long-term clinical outcomes are predictable, and patient satisfaction is generally high. However, the probability of biological complications associated with full-arch implant-supported fixed prostheses within 10 years can be as high as 91.2%. Poor oral hygiene and plaque accumulation are important risk factors for these biological complications. Proper cleaning and maintenance are crucial for the long-term success of full-arch implant-supported fixed prostheses. However, the most effective cleaning method remains unclear. Superfloss, interdental brushes, and water floss are commonly used auxiliary cleaning tools, but in vivo studies evaluating their cleaning efficacy are limited. Therefore, a randomized controlled study with a relatively long observation period is needed to better evaluate the cleaning effectiveness of different methods-superfloss, interdental brushes, and water floss-in patients with full-arch implant-supported fixed prostheses. This study adopts a self-controlled, three-phase crossover design. Participants will sequentially use superfloss (S), interdental brushes (I), and a water flosser (W) to clean the surface of full-arch implant-supported fixed prostheses. Each cleaning method will be used for three months, after which a follow-up examination will be conducted. The participants will then switch to the second cleaning method, followed by another evaluation after three months. Finally, they will switch to the third cleaning method, and a final examination will be performed after an additional three months, completing the study.

Effect of Mandibular Drilling Speed on Implant Stability and Osteogenic Potential: A Randomized Clinical Trial

This randomized clinical trial aims to evaluate the effect of different low-speed biological drilling protocols on implant stability and the osteogenic potential of autogenous bone particles collected during implant osteotomy. Patients requiring single dental implant placement in the mandible will be randomly assigned to different drilling speed protocols without irrigation. Implant stability will be measured clinically, while collected bone particles will be analyzed for osteogenic markers. The study aims to determine whether biological drilling improves implant stability and preserves the regenerative potential of autogenous bone.

Influence of Implant Insertion Depth on Peri-implant Bone Changes Around Short Implants

Dental implants are widely used to replace missing teeth and restore oral function and aesthetics. One of the key factors affecting the long-term success of dental implants is the stability of the bone surrounding the implant, particularly the crestal bone around the implant neck. Implant insertion depth relative to the alveolar crest may influence peri-implant tissue health and marginal bone remodeling. This randomized controlled clinical trial aims to evaluate the influence of implant placement depth on peri-implant health and radiographic bone changes around short dental implants placed using guided surgical protocol. All implants will be placed using the Bicon Implant System following computer-guided implant planning and surgical guide fabrication to ensure precise implant positioning. Participants requiring implant therapy will be randomly allocated into two groups. In the test group, implants will be placed 2 mm below the crestal bone level (subcrestal placement). In the control group, implants will be placed at the crestal bone level (crestal placement). Implant placement will be performed using guided implant surgery to standardize surgical positioning and minimize variability in implant angulation and depth. Clinical parameters related to peri-implant health, including Modified Plaque Index, Implant Mucosal Index, Peri-implant Mucosal Tissue Index and Probing Depth during follow-up visits at 3, 6 and 12 months. In addition, standardized radiographic examinations will be performed to measure peri-implant Crestal bone level changes at 12 months. The primary objective of this study is to determine whether subcrestal implant placement (2 mm below the bone crest) results in improved preservation of peri-implant crestal bone compared with crestal implant placement. Secondary outcomes will include assessment of peri-implant soft tissue health and overall implant stability. The findings of this study may help clarify the optimal implant insertion depth for short implants placed using guided surgery and may contribute to improving long-term implant success and peri-implant tissue stability.

Single-implant Versus Two-implant Mandibular Overdentures

This randomized controlled trial compares a mandibular overdenture retained by one implant placed in the parasymphyseal or canine region with a mandibular overdenture retained by two implants placed in the interforaminal region in completely edentulous adults. Primary outcomes are oral health-related quality of life, patient satisfaction, and masticatory performance measured by a two-color chewing gum mixing test, assessed at baseline before implant surgery and at 3, 6, and 12 months after overdenture insertion.

Accuracy of Digital vs Conventional Denture Impressions: An In Vivo Study

The goal of this clinical trial is to compare the accuracy of two denture impression techniques, digital intraoral scanning and conventional border-molded impressions, in adults who have lost all their teeth (fully edentulous patients). The main questions it aims to answer are: Is a digital intraoral scan as accurate as a conventional impression for capturing the shape of the mouth, including movable gum areas? Are repeated digital scans consistent (precise) when taken multiple times on the same patient? Researchers will compare digital impressions taken with an intraoral scanner to conventional impressions made with custom trays and border molding to see if digital scans can match the accuracy of the traditional "gold standard" method. Participants will: Attend Dubai Dental Hospital for two study visits. Have their mouth scanned three times using a digital intraoral scanner. Have a conventional impression taken using a custom tray and high-accuracy material after border molding. Provide informed consent and allow their impression data to be analyzed for accuracy.

3D-Printed Implant Overdentures: Comparing Impression Techniques

This randomized crossover clinical trial aims to compare three different impression techniques for the construction of 3d-printed mandibular implant overdentures in completely edentulous patients. Sixteen patients will receive two mandibular implants and three overdentures fabricated using:(1) conventional open-tray implant level impression (2) functionally generated reline impression, and (3)mucostatic base with functional borders impression. Each overdenture will be worn for three months with a washout period between interventions. The primary outcome is masticatory efficiency, assessed using a color -mixing ability test at 3,6, and9 months. Secondary outcome is patient satisfaction, assessed using a Visual Analog Scale (VAS) at the same intervals. the study hypothesis is that the impression technique influences both chewing efficiency and patient satisfaction

Platelet-Rich Fibrinogen in Extraction Socket Healing of the Aged

The purpose of this study is to better understand oral wound healing in the aged participant following placement of platelet-rich fibrinogen (PRF). In this study, 12 participants requiring a posterior tooth extraction will be enroll: 6 participants aged 14-18, 6 participants aged 50-80. All will undergo a posterior tooth extraction with a small tissue specimen taken from the extraction site. Half of the participants will also have their blood drawn and platelet-rich fibrinogen placed in the extraction socket. Participants will return in 2 weeks for suture removal and another soft tissue sample. Participants will return at 3 months for a final post-operative radiograph. All soft tissue samples will undergo immunofluorescence.

Accuracy of Metal Sleeve-Free Fully Guided Implant Surgery

This clinical trial aims to evaluate the in vivo accuracy of fully guided dental implant surgery using 3D-printed surgical guides without metal sleeves. The study is designed as a split-mouth clinical trial and will be conducted in partially or fully edentulous adult patients requiring complete-arch rehabilitation with dental implants. The primary objective of the study is to assess the accuracy of implant placement by comparing the virtually planned implant positions with the actual clinical positions achieved after guided surgery. Accuracy will be evaluated by analyzing linear and angular deviations between planned and placed implants. Participants will undergo a fully guided implant placement procedure using metal sleeve-free surgical guides. Two different drilling channel diameters (standard and reduced) will be randomly assigned in a split-mouth manner. Postoperative intraoral scans and cone-beam computed tomography (CBCT) scans with scan bodies will be obtained to register the final implant positions. The planned and achieved implant positions will be compared using three-dimensional analysis software to quantify deviations and determine whether the use of metal sleeve-free guides and reduced drilling diameters influences implant placement accuracy.

Dental Implant Healing With TNF-Alpha Inhibitors

The goal of this pilot study is to learn about healing after dental implant placement in patients taking a class of biologic drug called Tumor Necrosis Factor or TNF-alpha antagonist or inhibitor. The main questions it aims to answer are: Do patients taking TNF-alpha inhibitors have any complications after the placement of dental implants? Do patients taking TNF-alpha inhibitor experience increased pain after dental implant placement compared to the expected levels when healing from this procedure? Researchers will recruit patients both taking these drugs and those not taking these drugs to compare the outcomes between the two groups. Participants missing teeth will be recruited to receive dental implants to meet ideal dental status and will be followed before and after the implant placement to determine levels of health and ensure proper healing. Participants will be followed for a total of one year and follow up visits will consist of both clinical examination and radiographs (x-rays) to evaluate bone level and implant status. Participants will also be asked to rate their pain during clinic visits and at home on a diary and record the amount of pain control medication they take after the implant procedure.

Accuracy of Intraoral Photogrammetry vs Optical Scanners for Immediate Full-Arch Implant Loading

This prospective in vivo clinical trial evaluates and compares the accuracy (trueness) and scanning time of intraoral photogrammetry scanners (IPS) versus conventional intraoral optical scanners (IOS) for immediate full-arch implant impressions. The reference standard will be a verified conventional splinted open-tray impression taken at the uncovering stage. Sixty edentulous arches receiving 4-6 implants will be included. Linear, angular, and 3D Euclidean deviations will be calculated to assess accuracy.

Multicentric Prospective Observational Study of Neodent Implantable Devices of Helix Short System

This is a post-market prospective observational study to prospectively collect clinical data to confirm the long-term safety and clinical performance of implants and abutments Helix Short in a daily dental practice setting, by means of success and survival rates of these devices. Additionally, from the collected data, the study aims to identify previously unknown side-effects and monitor the known side-effects and contraindications stated on the IFU, identify and analyze emerging risks on the basis of factual evidence, and ensure the continued acceptability of the benefit-risk ratio with the intent to verify that the intended purpose is correct for all JJGC products involved in the procedure that get in contact with the patient.

Subcrestal vs Juxtacrestal PRAMA Implants With Variable Necks

The goal of this clinical trial is to understand how different implant neck designs and placement depths affect the surrounding bone and peri-implant tissue (the tissue around a dental implant) in adults who need implants in the back areas of the mouth (molars and premolars). The main questions it aims to answer are: Does placing implants deeper under the bone crest (subcrestally) help preserve more bone and peri-implant tissue over time? Do implants with longer, conical necks and micro-threaded surfaces result in more stable peri-implant tissue than implants with shorter necks? Researchers will compare three types of one-piece dental implants with different neck heights (short, standard, and long), placed at different depths in the jawbone, to determine which combination better maintains bone and peri-implant tissue levels. Participants will: Receive two dental implants in the posterior upper or lower jaw Be randomly assigned to one of three groups depending on implant neck design and placement depth Undergo implant surgery using a digital workflow, with healing over three months Be rehabilitated with custom zirconia bridges Return for regular clinical and imaging checkups over a period of at least 3 years This study aims to generate evidence that helps clinicians choose implant designs and techniques that promote long-term peri-implant tissue health.

Assessment of Wear and Muscular Efficiency of 3D Printed Versus Conventional Denture Teeth: A Cross-Over In Vivo Study

This study aims to evaluate the wear resistance and muscular efficiency of denture teeth fabricated using two different methods: 3D printing and conventional techniques. The research is designed as a crossover in vivo study, where completely edentulous patients will receive both types of dentures sequentially. The primary outcome is the amount of wear observed in the denture teeth over time, while the secondary outcome is the muscular efficiency measured using electromyography (EMG). The study seeks to determine whether 3D printed denture teeth offer advantages in durability and functionality compared to conventionally fabricated denture teeth. Results from this study may provide valuable insights into improving the quality and comfort of dentures for edentulous patients.

The Impact of Palatal Rugae Addition to Complete Dentures on Patients' Satisfaction and Oral Health Related Quality of Life

In conventional maxillary complete dentures, the palatal surface is typically smooth and polished, lacking the natural anatomy of the palatal rugae. While this design facilitates ease of cleaning, it may compromise the functional feedback required for speech and other oral functions. Since the palatal rugae contain mechanoreceptors essential for guiding the tongue during phonation and mastication, replicating these structures may enhance oral function and patient adaptation. Given the variation in clinical outcomes reported in prior studies, a randomized crossover clinical trial is warranted to assess the impact of adding anatomically replicated palatal rugae to complete dentures.

A Clinical Trial of Dental Device Cemented with Polymethyl Methacrylate (PMMA) Bone Cement

Conventional bridge and dental implants have been playing a significant role in replacing missing tooth/teeth. But they come with shortcomings. Hence, to explore the possibility of addressing such shortcomings, a clinical trial study of a new dental device made of zirconia is intended to be studied to see if it could serve as an additional option for fixed prosthodontics. An approach to explore possibilities for cheaper and faster procedure with regards to the treatment of tooth/teeth loss.

Evaluation of Different Attachments on Implant-Retained Mandibular Overdenture.

Patients will be selected from the outpatient clinic of Removable Prosthodontic Department. Faculty of Dental Medicine for Girls, Al-Azhar University.. Each patient will be assessed for eligibility and Informed consent will be obtained from patient after explanation of the treatment protocols and expected outcomes or alternative management.

Examining the Effects of Removable Denture Use in Patients Over 60 Years of Age

Patients over the age of 60 who do not currently have any removable dentures but require them will be included in the study. Patients who will receive complete dentures and those who will receive partial dentures will be assessed in separate groups. Before the fabrication of the dentures, the Mini-Mental State Examination Test (MMSE), the physical normative value test (TUG), and the Oral Functional Capacity (OFC) scoring will be conducted. No intervention will be made to the treatment during the prosthetic treatment process. The same questionnaires will be administered again three weeks after the completion of the prosthetic treatments. The impact of the use of removable dentures on test results will be evaluated. Additionally, during this session, patients will complete a patient satisfaction test regarding their dentures (OHIP-14 for patients with a removable partial denture indication, and OHIP-edent for patients with a complete denture indication). Patients will be called back after three months, and all tests will be repeated. The relationship between the Mini-Mental State Examination, the TUG test, and the OFC test with patient satisfaction will be assessed and any changes in test scores related to denture use will be investigated.

Success and Safety of the Implant Placement Using Navigated Surgery

Subjects with severely atrophic mandibles were treated with implants and implant-based restorations. Subjects will be required to consent to study participation and data processing according to General Data Protection Regulation (GDPR). Implant positions were planned digitally in a dental software DTX Studio, and implants placed with navigated surgery (Nobel Biocare X-Guide). Implants eligible for this study must be placed 2 mm or less from the alveolar nerve. Implants placed are NobelParallel TiUnite and NobelActive TiUnite. All subjects were followed up for 1 year after surgery to monitor success and adverse events related to the alveolar nerve. Data analysis will include demographics, medical history, Cone-beam Computed Tomography (CBCT) scans/peri-apical x-ray data, soft tissue parameters, and adverse events.

Pilot Study on the Effectiveness of a Flexible Hydroxyapatite-Based Composite for Jaw Bone Regeneration

Following a review of the scientific literature, it was found that there are no clinical studies but only in vitro and in vivo studies, which show promising results in terms of bone formation and integration. However, it is necessary to evaluate how well the regenerated bone maintains its structural integrity over time, considering masticatory function and real-life biomechanics. Factors such as mechanical load, remodeling dynamics, and interactions with surrounding tissues could influence the long-term stability of the regenerated bone. Additionally, another important aspect to study is the potential complications and adverse effects associated with the use of the flexible HAp-based composite.

5-Years PMCF Study of Ceramic Dental Implants One-piece Versus Two-piece.

The goal of this cohort observational study is to compare in the survival rate of ceramic dental implants placed in patients with missing or hopeless teeth . The main question\[s\] it aims to answer are: * Are there any significant differences in survival rate between the use of one-piece ceramic implant versus the two-piece (TL) variant? * What are the complications associated to the procedure and differences between the two groups.