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Showing 1-20 of 28 trials
NCT07433920
the rationale of the current study is to address a focused and clinically relevant gap in socket shield therapy: which biologic modality best supports healing of the shield-implant gap when SST is performed under a standardized, digitally guided workflow. The study will compare three shield-implant gap filling modalities: (i) L-PRF alone (without membrane), (ii) sticky tooth (autogenous dentin graft +i- PRF), and (iii) sticky bone (particulate graft + i- PRF) under AI-assisted, patient-specific guided implant placement based on IOS/CBCT superimposition, with CBCT follow-up at immediate, 3 months, and 6 months. The working hypothesis is that biologically active, cohesive composites (sticky tooth and sticky bone) will provide superior hard- and soft-tissue dimensional stability compared with PRF alone by improving space maintenance and early wound stability in the shield-implant gap . The null hypothesis is that there will be no statistically significant differences between the three modalities in radiographic and digitally assessed clinical outcomes over the 6-month follow-up period .
NCT06099717
The study aims to evaluate the clinical performance (implant and prosthetic survival/ success rates) of a novel implant-supported fixed dental prosthesis design: the dual-cantilevered single implant bridge (T-Bridge) made out of monolithic zirconia bonded to a titanium base abutment (Variobase abutments)
NCT05676268
To report the clinical and radiographic outcomes of implant-supported fixed dental prostheses with full-ceramic cantilever extensions (FDPCs) after a function time ≥ 12 months.
NCT06043037
The current trial aim was to evaluate clinically and radiographically the changes around dental implants inserted immediately in maxillary anterior esthetic zone using a novel combination of autogenous demineralized dentin graft (ADDG) with socket shield technique (SST) and compared this approach to socket shield technique (SST) alone. The present study included 50 participants, aged 20 to 45, with teeth that needed to be extracted. After Kafrelsheikh University research ethics committee approval, participants were randomized into 2 groups: the control group patients underwent immediate implantation using SS protocol, while the study group patients underwent the same procedure, but ADDG was created using the extracted palatal portion of the tooth; and then placed in the peri-implant gap defect.
NCT06288919
The aim of the study is to assess which prophylaxis methods is the most suitable for peri-implant hygiene between erythritol and ultrasonic scaler with peek inserts. A randomized clinical trial will be conducted on the patient. Patients will be randomly divided into two groups: * Erythritol group: erythritol with a particle size of \~14 µm will be used for 5 seconds (AIRFLOW® PLUS EMS) * Ultrasonic scaler group: a piezoelectric handpiece with peek inserts (Mini Piezon EMS; PI EMS) will be used. Different subgroups will be defined according to the material of the dental crown of the related implant. The oral hygiene session will be carried out every 6 months (2-years follow-up; 6 sessions), after instruction and motivation of the patient, completion of the clinical chart with the recording of the Probing Depth (evaluation in mm of the peri-implant sulcus taken by a periodontal probe; 4 surfaces of the gingival margin are detected: vestibular, palatal/lingual, mesial, distal), Bleeding on Probing and Plaque Index.
NCT06671678
This case report presents the long-term prognosis of an implant resulting in late failure with an osteointegrated root remnant on the fixture 11 years after implant placement. A 68-year-old female patient experienced issues with a maxillary right 4-unit implant-supported bridge placed 11 years ago. During removal, an osteointegrated root remnant was discovered on the middle supporting implant, which had been inadvertently placed over it. Clinicians should be cautious with retained root remnants, as they may impact osteointegration. However, both the implant and root fragment were osteointegrated without adverse effects.
NCT06570499
The aim of this clinical trial is to compare implant-supported definitive impressions in edentulous patients (mandible or maxilla) with 4 to 8 osseointegrated implants. The main questions it aims to answer are : The primary outcome of this prospective clinical comparative study is to analyse the precision of a complete-arch impression. The secondary aim is to obtain patient satisfaction with these new types of impression. The different impressions (conventional, intraoral scanner and photogrammetry) will be taken twice on the same patient.
NCT06554080
This is a retrospective cohort study that evaluates the survival (Outcome 1) of dental implant systems (external connection (Cohort 1) and internal connection (Cohort 2) and the effectiveness of maintaining crestal bone levels (Outcome 2), placed within United Kingdom Armed Forces personnel. The secondary objectives include: assessment of block bone grafting on outcome, assessment of restoration (bridge vs crown on outcome) and assessment of placement technique (immediate, early, delayed placement). Inclusion criteria: all military patients that received dental implants since 2014-2024. Exclusion criteria: military patients that have not received radiographic review or follow-up of the dental implant or who have left service or have a follow-up that is less than 12-months post placement of the dental implant..
NCT06488599
Few if any studies have compared marginal bone loss (MBL) around implant-retaining overdentures (2 implants with locators) versus implant supported fixed hybrid prosthesis (over 4 implants) in the mandible.
NCT06294171
The aim of the study is to determine the efficacy of modified piezosurgery with osseodensification drills in expanding narrow alveolar bone.
NCT06240416
The aim was to compare the osteoblast activity and osteogenic potential of autogenous bone particles harvested using three different techniques, determine the most advantageous method of collecting autogenous bone particles. Bone particles were harvested during dental implant surgery using low-speed drilling and high speed drilling. After the osteoblasts were cultured, cell proliferation, migration, mineralization, transcription of osteogenesis-related genes, secretion of osteogenesis-related proteins, and osteoinductive protein content in the bone particle matrix were evaluated
NCT06206499
Peri-implant mucositis is one of the most common peri-implant diseases. It was reported in more than 20% of the subjects rehabilitated with dental implants (Lee et al. 2017; Rodrigo et al. 2018; Wada et al. 2019). Furthermore, a significant association was found between peri-implant mucositis, and smoking, implant maintenance and peri-implant soft tissue characteristics (Wada et al. 2019). Soft tissue quality and volume of the peri-implant mucosa are considered important factors in the prognosis of osseointegrated implants. Linkevicius et al. showed that if its soft tissue thickness was less than 2 mm, crestal bone loss might occur (Linkevicius et al. 2009). In addition, when soft tissue width was evaluated, a wider soft tissue band was related to minimal bone remodeling (Linkevicius et al. 2015). Lin et al. reported in a systematic review and meta-analysis that a lack of keratinized tissue (KT) around osseintegrated implants was associated with plaque accumulation, peri-implant tissue inflammation, soft tissue recession and attachment loss (Lin et al. 2013). Moreover, recent studies established the need of a minimal band of 2 mm of KT around osseointegrated implants, and showed that a band less than 2 mm was associated with more brushing discomfort, plaque accumulation, tissue inflammation and marginal bone apical displacement, concluding that a KT\>2 mm had a protective effect on peri-implant tissues (Souza et al. 2015, Perussolo et al. 2018, Monje et al. 2019). Furthermore, peri-implant tissue diseases have also been related to an irregular compliance in situations of lack of KT (Monje et al. 2019). In the presence of peri-implant horizontal and/or vertical soft tissue deficiencias, soft tissue augmentation has been considered a priority, even prior or instead of bone augmentation (Burkhardt et al. 2008, Zucchelli et al. 2013).
NCT05973357
Multiple clinical studies have established high survival rates and tremendous predictability of dental implant treatment. However, a pleasant esthetic outcome is the patient's primary expectation regarding implants in the esthetic zone and several esthetic factors have been evaluated to contribute to an esthetic appearance. Among these, the midfacial soft tissue level is considered to be one of the most important factors; Cosyn and co-workers reported that among factors including soft tissue phenotype, the midfacial recession was associated with the position of the implant . Therefore, subcrestal implant placement has been advocated as it has been associated with the reduction of crestal bone loss in cases with decreased soft tissue thickness. If the vertical soft tissues on the crest of the alveolar ridge are 2 mm or less at the time of implant placement, implants will undergo unavoidable bone resorption by establishing sufficient biologic protection. Another option was proposed by Linkevicius et al, who introduced the subcrestal implant placement as a method to accommodate the problem of thin soft tissues. Research question: Does the placement of delayed implants with different vertical depth affect the marginal bone loss with immediate provisionalization?
NCT05838365
The main aim of the present study is to investigate implant success rate after 5 years of function of immediate (Test group; within 7 days of implant placement) versus delayed (Control group; 8 weeks after implant placement) loading of two-pieces zirconia implant, placed in pristine bone without bone regeneration. Implant success rate will be defined according to Buser's criteria. Secondary endpoints: Marginal bone level (MBL) evaluation by means of standardized radiographs; Clinical evaluation of biological (e.g. Plaque Index, PI; Probing Pocket Depth, PPD, Bleeding on Probing, BOP; suppuration upon probing/palpation) and prosthetic/technical complications; Clinical evaluation of soft tissue width, keratinized tissue, marginal and interproximal soft tissue recession; Patient reported outcome measures (PROMs) by questionnaire administration:
NCT05754970
The health of peri-implant soft tissues is important for the long-term success rate of dental implants and the surface topography is pivotal in influencing it. Thus, the aim of this study was to evaluate, in human patients, the inflammatory mucosal microenvironment in the tissue surrounding a new, nanoscale, laser-treated healing abutment characterized by engineered nanopores versus a standard machined-surface. The prospective clinical study will evaluate the effect of the presence of a laser-etched surface in the coronal portion of healing stumps in forming the coronal seal and reducing the accumulation of bacterial plaque around it. The screws will serve as their own control group since they have both a laser-etched and a smooth portion. Primary objective: To evaluate the adhesion of fibroblastic cells from the peri-implant mucosa on the surface of the healing stump through scanning electron microscope analysis, expressed in terms of the area covered by the cells. Secondary objectives: To evaluate the amount of bacterial adhesion around healing stumps with a laser-etched and smooth altered surface through scanning electron microscope analysis, expressed in terms of the area covered by the cells. To evaluate the presence of hemidesmosomal structures through the expression of α-6 and β-4 integrins. To evaluate bacterial adhesion on healing screws. To evaluate the healing of peri-implant soft tissues through clinical indices, such as Plaque Index and Gingival Index. The healing period was 12 ± 4 weeks (T1) before the second surgical procedure, during which all healing abutments were placed. To prevent allocation bias among patients, each healing abutment was designed with two surfaces that alternated between laser-treated/machined and ma-chined/laser-treated. The experimental healing abutment was removed after 30 ± 7 days, which coincided with the soft tissue biopsy.
NCT04884126
Regional oral and maxillofacial defects secondary to ablative tissue resection can contribute to severe aesthetic and functional loss, which influences patients' regular life and may cause psychological problems. Microvascular free flaps are considered the gold standard for reconstructing large oral and maxillofacial defects. In the past decade, with the help of computer-aided design (CAD)/ computer-aided manufacturing (CAM) customized implants and prosthesis (CIP) have led to a significant improvement of the operative accuracy, improve the flap survival rate and enhance the patients' quality of life. Concerning the increased overall survival rate of the patients, people pay more attention to the quality of life and aesthetic appearance which are influenced by the fitness and compatibility of the CIP. However, from literature reviews, the evaluation was various to be concluded in some certain conditions from pooled studies.
NCT04518020
Implant placement in the posterior part of the maxilla is frequently compromised due to atrophy of the alveolar process. Therefore, alveolar ridge augmentation is frequently necessary before or in conjunction with implant placement. The most commonly used method to augment the maxillary premolar and molar region involves the maxillary sinus floor augmentation (MSFA) with autogenous bone graft or a bone substitute. However, the use of autogenous bone grafts is associated with risk at the donor site morbidity and unpredictable graft resorption. Consequently, short implants are used increasingly to eliminate the need for bone augmentation. However, long-term studies comparing short implants and standard implants in conjunction with MSFA supporting single crown restoration in the posterior maxilla are missing. The primary outcome measures include survival of implant and suprastructures, peri-implant marginal bone level (MBL), professional evaluation of the suprastructure and soft tissue using pink esthetic score (PES) and white esthetic score (WES), patient satisfaction using visual analogue scale (VAS), and oral health related quality of life using oral health impact profile (OHIP-14) questionnaire. Secondary outcome measure include evaluation of the complication rate related to the two treatment modalities.
NCT03715439
A prospective study to evaluate and compare implants placed in preserved versus non-preserved extraction sockets using L-PRF (Leucocyte- and platelet-rich fibrin) after 1, 3 and 5 years.
NCT05390242
The impact of smoking on dental implant failure has been a constant topic of discussion for the past decade and the current literature confronts the inconclusive evidence of tobacco for a marginal bone loss risk factor. The aim of the present investigation is to determine the association between tobacco and marginal bone loss or implant failure in a sample of patients who had received implant-supported restorative therapy in the Dentistry Hospital of the University of Barcelona (Campus of Bellvitge). Considering that peri-implant marginal bone is essential for dental implant success, in this study we would like to establish the relationship between marginal bone loss around implants and smoking, in our own population study, in order to improve the prognosis of implant success in smoking patients. On the other hand, knowing the negative effect tobacco has on marginal bone loss in dental implants, we will be able to better predict peri-implant bone loss and reveal the probability of implant failure in short and long-term in smokers. By informing the patient correctly, we can raise awareness and create an additional reason for them to stop smoking, or at least reduce the number of cigarettes they smoke per day.
NCT04905758
patients were randomly divided into Maxi-Z plus dental implant group versus Maxi-Z implant group