Clinical Research Directory

Guided Bone Regeneration Combined With PRGF for Atrophic Edentulous Maxilla

This prospective interventional clinical study evaluated guided bone regeneration combined with plasma rich in growth factors for vertical and horizontal augmentation of the atrophic edentulous maxilla. Participants with severe maxillary ridge atrophy requiring bone augmentation before implant-supported rehabilitation underwent guided bone regeneration using a composite graft of autogenous bone and anorganic bovine bone mineral combined with plasma rich in growth factors. Barrier membranes were stabilised with titanium pins, and lateral-window sinus floor elevation was performed when indicated. Implants were placed using a delayed protocol at re-entry after 6-9 months. Radiographic bone height and width were assessed by cone-beam computed tomography before surgery, immediately after surgery, at 6-9 months, and at 12 months. The study also recorded graft dimensional stability, implant placement, and surgical or postoperative complications.

Immediate Molar Implants With Customized Healing Abutments in Different Post-Extraction Socket Classes

Immediate implant placement into a fresh extraction socket shortens overall treatment time and reduces the number of surgical procedures, but the fit between the implant and the socket walls, and the resulting soft-tissue contour, differ substantially between socket types. This study evaluates immediate implant placement in the molar and posterior region combined with an individually fabricated (customized) healing abutment, or sulcus former, that seals the socket and shapes the emergence profile from the day of surgery. Consecutive patients with a non-restorable posterior tooth are treated with flapless atraumatic extraction, immediate implant placement, grafting of the residual gap, and a chairside customized healing abutment fabricated on a titanium temporary abutment. Participants are grouped by the class of the post-extraction socket (A, B or C) according to the interradicular septal bone available for primary stability. Outcomes are preservation of peri-implant soft-tissue volume assessed with an intraoral scanner, preservation of alveolar bone volume assessed on cone-beam computed tomography, implant stability measured by resonance frequency analysis (ISQ) at placement and before loading, and time to definitive loading. Early wound healing on the Landry index, the degree of bone corticalization before loading, implant survival, healing-abutment complications and analgesic requirement are also recorded.

Autogenous Dentin Graft for Alveolar Ridge Preservatio

When a tooth is extracted, the bone around the empty socket naturally shrinks over time, which can make it difficult to place a dental implant later without additional bone-building procedures. This study investigated whether grafting the socket with the patient's own extracted tooth material, processed into a graft (autogenous dentin graft), can help preserve this bone. The study also examined whether adding platelet-rich fibrin (PRF), a concentrate prepared from the patient's own blood that is rich in healing factors, could further improve outcomes. A total of 56 extraction sockets were randomly assigned to one of four treatment approaches: no grafting (natural healing), dentin graft alone, dentin graft combined with PRF, or a freeze-dried bone allograft, which is a commonly used bone substitute for comparison. Four months after treatment, small bone samples were taken from each site at the time of dental implant placement and examined under the microscope to measure how much new bone had formed, along with other markers of healing such as blood vessel formation and a bone-growth protein called BMP-2. The results showed that sockets treated with dentin graft healed at least as well as those treated with the standard bone substitute, and that combining dentin graft with PRF produced the best healing results of all groups tested. These findings suggest that a patient's own extracted tooth, which would otherwise be discarded, may serve as an effective and low-cost graft material for preserving bone after tooth extraction, particularly when combined with PRF.

VST vs Modified Periosteal Inhibition Technique

Losing a tooth in the upper front of the mouth is common, and many people choose a dental implant to replace it. When a tooth is removed, the thin layer of bone in front of the socket - the buccal, or front, bone - often shrinks as the area heals. If this bone shrinks, the final implant can look less natural and the gum can recede. The problem is greater when part of the front bone is already missing at the time the tooth is taken out; this type of socket is harder to treat. This study compares two surgical techniques that aim to protect the front bone and gum while a dental implant is placed on the same day the tooth is removed. In Vestibular Socket Therapy (VST), a thin bone membrane is inserted through a small incision high in the gum fold to cover the front bone, and bone graft material is packed into the socket. In Modified Periosteal Inhibition (MPI), a thin bone membrane is placed against the outside of the front bone and held in place with a tissue glue, and the socket is filled with a collagen sponge. Adults aged 20 to 50 with a non-restorable upper front tooth (canine to canine) and partial loss of the front bone can take part. Participants are randomly assigned to one of the two techniques and receive an implant immediately after the tooth is removed, then are followed for 12 months. Using cone-beam CT scans, intraoral scans, and an esthetic (appearance) score taken at the start and at 6 and 12 months, the investigators measure the thickness of the front bone, the level and thickness of the gum around the implant, and the overall appearance. The study tests whether one technique preserves or increases the thickness of the front bone and produces better gum and esthetic results than the other.

Simultaneous Implant Placement With Vertical and Horizontal Bone Augmentation

The purpose of this study was to report the clinical and radiographical outcomes of using autogenous cortical bone plates combined with sticky allogenic bone graft for augmenting maxillary anterior atrophic combined horizontal and vertical ridge defects with simultaneous versus staged implant placement.

Ultrasound for Socket Healing Evaluation

The design is a single blinded, dual comparative study of ultrasound versus micro-CT/LASCA in one study group. Up to a total of 140 subjects registered will be recruited. Subjects who are treatment planned for extraction of a hopeless tooth and socket augmentation with bone graft and are planned for a dental implant surgery. The socket will be evaluated before the extraction and multi-time points during healing until an implant is placed with various evaluation tools, including ultrasound.

Alveolar Ridge Preservation (ARP) in the Posterior Maxilla After the Extraction of Maxillary Molars

Dental implants are a fixed replacement solution with reported long-term survival rates between 94-98% over 20-40 years. In order to ensure successful implant therapy, adequate bone and soft tissue as well as correct 3D positioning of the implant are required. Upon extraction of a tooth, socket width can decrease by up to 60% within six months post-extraction, with a 11-22% vertical reduction. Additionally, sinus pneumatization occurs post-extraction as the maxillary sinus expands into the empty socket due to disuse atrophy and intra-sinus air pressure, as explained by Wolff's law. This further reduces residual bone height (RBH), often resulting in posterior maxillary sites requiring supplemental procedures to prevent bone loss or to augment the bone height at the time of implant placement. However, if the bone height and width dimensions are sufficient before and after extraction - in that, even with the aforementioned loss in width and height percentages in the latter, a standard implant may still be placed in the surrounding bone, one can argue that grafting may not be necessarily done at the time of extraction. Rather, it can be tailored to the patients' needs; thus potentially reducing overall post-operative discomfort and pain.

Demineralized Dentin Allograft Versus Demineralized Dentin Autograft for Socket Preservation

This study is designed to evaluate and compare clinically and radiographically the effectiveness of Demineralized Dentin Allograft (DDA) versus Demineralized Dentin Autograft (Auto-DD) for preservation of alveolar ridge dimensions after surgical extraction of the impacted mandibular third molar.

Osseodensification for Narrow Alveolar Ridge Expansion

This prospective, single-arm, non-randomized interventional clinical study was designed to evaluate the immediate horizontal dimensional change in narrow alveolar ridges following osseodensification-assisted dental implant-site preparation. Eligible participants with healed edentulous sites in the maxilla or mandible underwent implant-site preparation using osseodensification burs operated in densifying mode. Alveolar ridge width was measured directly using standardized Micro Castroviejo bone calipers at three predefined levels: the crestal level and 5 mm and 10 mm apical to the crest. Measurements were obtained immediately before and immediately after osseodensification-assisted osteotomy preparation. The primary outcome was the within-site change in alveolar ridge width at the three measurement levels. Additional assessments included insertion torque at implant placement and recorded postoperative complications. The study included a single treatment group and did not include a conventional-drilling or alternative ridge-expansion comparison group

Crestal Sinus Lifting in Periodontally-Compromised Patients Utilizing Autologous Dentin Graft

The integration of artificial intelligence and computer-guided technology offers the potential for improving surgical accuracy, reducing complications, and enhancing outcomes. Additionally, advancements such as electromagnetic mallets for bone manipulation and autologous dentin grafts provide promising alternatives for bone regeneration. This study aims to combine these technologies to assess the efficacy and clinical outcomes of AI-assisted, computer-guided crestal sinus lifting with immediate implant placement in periodontally compromised sites.

Ovate Pontic Versus Essix Provisional After Tooth Extraction and Alveolar Ridge Preservation (Pontic-Essix)

This randomized controlled trial compares two provisional socket-sealing concepts following single non-molar tooth extraction and alveolar ridge preservation: a fixed, tooth-supported, 3D-printed ovate pontic provisional restoration providing active soft tissue support (test) versus a removable Essix-type provisional restoration without intentional soft tissue contact combined with a porcine collagen matrix seal (control). Both groups receive alveolar ridge preservation using a deproteinized bovine bone mineral with 10% collagen. The primary endpoint is interproximal soft tissue height at 5 months, adjusted for baseline, assessed by digital superimposition of intraoral surface scans. Up to 40 participants will be enrolled at the University of Bern School of Dental Medicine.

Description of Pain in Pediatric Patients With Cleft Lip and Palate Undergoing Alveolar Grafting Using Two Surgical Strategies: Stem Cells and Autogenous Iliac Crest Bone (Pain Evaluation in Children Undergoing Alveolar Grafting: Stem Cells vs. Iliac Crest Bone)

Study Objective The objective of this study was to evaluate and compare postoperative pain and hospital costs in pediatric patients with cleft lip and palate undergoing alveolar bone grafting surgery. The study compared a new tissue engineering approach against the traditional surgical technique. Background and Strategies To correct the bone defect in the upper jaw (alveolus), the standard treatment involves harvesting bone from the patient's hip (iliac crest). Although highly effective, this traditional method requires a second surgical site, which often leads to significant pain and complications at the donor site. To eliminate donor-site pain and morbidity, researchers evaluated an alternative approach using Stem Cells from Human Exfoliated Deciduous Teeth (SHED), which are naturally shed by children in this age group. These stem cells were combined with a collagen-hydroxyapatite scaffold (a supportive biomaterial sponge) to fill the bone defect, completely avoiding the need to harvest bone from the hip. Study Design A randomized controlled clinical trial was conducted with 20 pediatric patients aged 7 to 12 years with unilateral cleft lip and palate. Participants were randomly assigned into two equal groups: Group 1 (Control): Received the conventional autogenous bone graft harvested from the iliac crest. Group 2 (Experimental): Received the bioengineered graft combining SHED and the scaffold biomaterial. The researchers monitored the intensity and duration of pain in the Post-Anesthesia Care Unit (PACU) and the hospital ward. They also measured the consumption of simple analgesics and opioids (such as morphine and codeine) needed for pain relief, monitored postoperative complications, and performed an economic projection of medication expenditures.

Bone Level Changes Using Clear Aligners Compared to Fixed Appliances in Non-Extraction Treatment of Adults

This study compares two common ways of straightening teeth in adults who have mild-to-moderate crowding of the lower front teeth and do not need any teeth removed: clear aligners and traditional fixed braces. The main aim is to find out whether the two methods differ in how they affect the bone that surrounds the teeth. Using three-dimensional X-ray scans (cone-beam CT) and digital models of the teeth taken before and during treatment, the researchers measure the level and thickness of the bone around the lower front teeth, the tilt (inclination) of the lower front teeth, and how quickly the crowding is corrected. Adults are randomly assigned to receive either clear aligners or fixed braces, and the same measurements are compared between the two groups over about six months.

Khoury's Bone Shell Technique Versus Titanium-Reinforced Polytetrafluoroethylene for Augmentation of Horizontal Deficiency in Posterior Mandible (Histomorphometry Analysis)

The purpose of the study is the comparison of bone gained histologically from the Bone Shell Khoury's Technique in comparison with the usage of non-resorbable membrane polytetrafluoroethylene and discussing its eligibility for implant placement in restoring the atrophic posterior mandible.

Impact of Hyaluronic Acid and Bone Graft on Peri-Implant Tissue

This randomized controlled clinical trial aims to evaluate the effect of hyaluronic acid (HA) and particulate bone graft on the peri-implant tissue phenotype in patients receiving dental implants. Healthy adult participants requiring dental implant placement will be randomly allocated into one of three equal groups (12 implants per group): Group 1 will receive dental implants combined with hyaluronic acid gel (Gengigel); Group 2 will receive dental implants combined with both hyaluronic acid and particulate bone graft; and the control group will receive dental implants alone. Clinical and radiographic assessments will be performed using a customized measurement stent to ensure standardized evaluations at baseline, immediately postoperatively, and at 8 and 16 weeks of follow-up. The primary and secondary outcomes include alterations in ridge width, keratinized tissue width/thickness, radiographic soft tissue height, and marginal bone height. The study aims to determine whether the adjunctive use of hyaluronic acid and bone grafts enhances the quality of the peri-implant soft and hard tissue phenotype.

Linear Micro-Perforation Osteotomy Ridge Split Approach

The traditional ridge split technique might be performed simultaneously with implant placement, resulting in a shortened treatment time. However, this approach has the potential for serious complications, including buccal bone fracture, prolonged pain or paresthesia, and loss of bone height. Linear Micro-Perforation Osteotomy (LMPO) has emerged as a less invasive alternative, promoting natural bone expansion through controlled micro-perforations in the cortical bone, allowing for ridge widening without extensive grafting. However, the precision required for LMPO can be difficult to achieve manually, especially in anatomically complex or narrow ridge areas, leading to variability in outcomes and potential risks such as bone fractures or inadequate expansion.Our study aims to evaluate the efficacy, clinical, and radiological outcomes of the flapless AI-powered/computer-guided LMPO ridge split/expansion technique compared to the traditional LMPO ridge split/expansion method for lateral ridge reconstruction of mandibular horizontal ridge deficiencies.

Assessment of the Impact of Neocement Inject P® (Beta-Tricalcium Phosphate) on Bone Volume in Alveolar Ridge Preservation After Tooth Extraction

The goal of this randomized clinical trial is to assess whether β-TCP (Beta-Tricalcium Phosphate) improves alveolar ridge preservation (ARP) in patients who need tooth extraction. The main question it aims to answer is whether using β-TCP for alveolar ridge preservation has a positive effect on bone volume compared with natural healing. The main questions it aims to answer are: Does β-TCP improve ridge preservation compared with natural healing? Researchers will compare β-TCP grafted sockets to natural healing sockets to see if β-TCP better preserves ridge volume. Participants will: Have a tooth indicated for extraction. Be assigned to either β-TCP or natural healing. Undergo CBCT (Cone Beam Computed Tomography) and intra-oral scanning after extraction and after six months of healing to measure horizontal and vertical resorption and bone density.

Alloplastic Graft vs Xenograft for Horizontal Alveolar Ridge Augmentation

This prospective split-mouth randomized controlled trial compared horizontal alveolar ridge augmentation using alloplastic bone graft versus xenograft, both performed simultaneously with implant placement using the decompression technique in the posterior mandible. Outcomes included postoperative edema, pain, soft tissue healing, and horizontal bone gain at 6 months assessed by CBCT.

Evaluation of the Effectiveness of Odontogenic Grafts Obtained From Human Teeth on Bone Formation

Tooth extraction triggers a cascade of biological events mediated by the local inflammatory response following surgical intervention and by the loss of masticatory stimulation to the periodontium. These factors disrupt the homeostasis and structural integrity of the periodontal tissues. Following tooth loss, bone remodeling is initiated and continues for several months, with the majority of dimensional and morphological changes occurring within the first three months. This early alveolar bone resorption may compromise future implant placement and prosthetic rehabilitation. Previous studies by Schmidt-Schultz and Schultz have demonstrated that biologically intact growth factors can be preserved within the collagenous extracellular matrix of ancient human bone and teeth. These findings suggest that stored dentin may retain biologically active growth factors and provide regenerative benefits comparable to those of freshly prepared dentin, while eliminating the need for simultaneous multiple surgical interventions. Moreover, the volume of particulate dentin exceeds twice the original root volume, allowing for the acquisition of sufficient graft material for clinical application. Based on these biological and volumetric advantages, the use of autogenous stored mineralized dentin grafts (ASMDG) has emerged as a promising approach for alveolar socket preservation. ASMDG may contribute to limiting post-extraction alveolar ridge resorption and maintaining ridge dimensions during the critical early healing period.

Reduced Time Interval for Implant Placement After Extraction Socket Preservation Using the Vega Plus Implants

This randomized controlled clinical trial aims to evaluate whether reducing the healing interval for implant placement after extraction socket preservation improves clinical and radiographic outcomes compared with the conventional waiting period. Participants requiring single-tooth extraction and implant therapy will be randomly assigned to implant placement either 4 months or 6 months after ridge preservation using the Vega Plus implant system (Klockner). Clinical and radiographic assessments will be performed at baseline and during follow-up visits. The primary outcome will be the mean change in horizontal alveolar ridge width measured using cone-beam computed tomography (CBCT). Secondary outcomes will include vertical bone height changes measured on CBCT, implant stability measured using resonance frequency analysis (ISQ values), marginal bone level changes assessed on standardized periapical radiographs, and postoperative pain assessed using the Visual Analog Scale (VAS). The results of this study may contribute to optimizing treatment timing and improving efficiency in implant dentistry while maintaining favorable clinical outcomes.

The Application of a Biphasic Calcium Sulfate Graft Material in Sinus Floor Elevation

Pneumatization of the maxillary sinus may lead to insufficient bone volume for dental implant placement in the edentulous posterior maxilla. Sinus floor elevation (SFE) surgery with the lateral window technique is a safe and predictable surgical intervention to restore bone height in the maxillary premolar and molar areas. According to the literature, several bone graft materials may be successfully applied for SFE surgery. There is a lack of evidence regarding the application of biphasic calcium sulfate (BCS) for SFE. The healing period following staged SFE is 2-9 months. The aim of this study is: * to evaluate the success of SFE surgery using BCS as graft material, * to compare the microarchitecture of the augmented bone depending on the healing period, * to evaluate the success of dental implants placed in the augmented bone and that of the prostheses delivered on the dental implants.

Socket Shield Technique With CGF and Xenograft for Immediate Implants

This prospective case series aims to evaluate the clinical and radiographic outcomes of immediate implant placement using the socket shield technique combined with concentrated growth factors (CGF) and xenograft in the esthetic zone. The study will assess crestal bone level changes and implant stability over a 6-month follow-up period.

Immediate Implant Placement Using Socket Shield With CGF

This prospective case series study aims to clinically and radiographically evaluate the effectiveness of the socket shield technique combined with concentrated growth factors (CGF) in immediate implant placement in the esthetic zone. Outcomes will include crestal bone level changes assessed by CBCT and implant stability measured using Osstell.

Evaluation of Stem Cell Exosomes Versus Platelet-Rich Fibrin in Tooth Extraction Socket Healing

This study evaluates two different treatments used to help the jawbone heal after a tooth is removed. When a tooth is extracted, the surrounding bone often shrinks, which can make it difficult to place dental implants later. Currently, doctors often use Platelet-Rich Fibrin (PRF), which is made from the patient's own blood, to help the area heal. This research compares PRF to a newer treatment using "exosomes" derived from stem cells. Exosomes are tiny particles that carry signals to tell the body to repair tissue and grow new bone. The goal of this study is to see if these exosomes work better than PRF at keeping the bone strong and thick after an extraction. Researchers will use specialized X-rays (CBCT) to measure the bone three months after the procedure to see which treatment provided better results.