View clinical trials related to Bone Resorption.
Filter by:The goal of this clinical trial is to test two different implant neck designs in 36 patients. The main question[s] it aims to answer are: - do triangular neck designed implants placed immediately after dental extraction have the same influence on peri-implant hard and soft tissues than regular neck designed implants at one year? - do triangular neck designed implants placed immediately after dental extraction have the same influence on peri-implant hard and soft tissues than regular neck designed implants at three years? Participants that present an unrepairable tooth on the anterior upper maxilla will be asked to take a CBCT scan in order to verify the presence of the buccal bone. Once this is verified the patients will enter in the study and the day of the surgery they will be assigned to either control or test group. - Control group: C1 round-neck implant - Test groups: V3 triangular-implant neck Researchers will compare test and control groups to see if they have the same effects on hard and soft tissues at 4 months, 1 year and 3 years.
The aim of this clinical trial is to compare serum concentration of bone intake proteins [ sex hormone-binding globulin (SHBG), cross linked C-telopeptide of type I collagen (CTX-I)] and muscle atrophy marker [creatine kinase (CK-MB)] between patients after the fracture of proximal femur and their age corresponding counterpart without the fracture. The main question it aims to answer is: • Is the higher concentration of bone intake proteins and muscle atrophy marker a predictive factor of proximal femur fracture? The part of participants (Group 1) will be hospitalized at the Department of Orthopaedics and Rehabilitation and will undergo a surgical treatment (open reduction of the fracture). The rest (Group 2) will be admitted to the Department of Internal Medicine. Participants of both Groups will have the blood sample test taken, to evaluate and compare the serum concentration of SHBG, CTX-I and CK-MB proteins.
The aim of this randomized prospective clinical trial was to evaluate the outcome of bone block harvesting from the retromolar region using the Conventional and Piezosurgery Method. The study was planned on 19 patients (13F,6M) on 31 donor sites. In patients with bilateral bone harvesting, the donor site and the surgical method to be used were determined by the randomization protocol, while in patients with bone harvesting from a single site, the donor site was determined by considering parameters such as proximity to the operation site and distance to the inferior alveolar nerve. Clinical parameters such as operation time, pain, swelling, trismus, nerve damage were evaluated.
Nutrient intake of calcium and protein are known to function as regulators of bone remodeling. Specifically, a balanced rate of bone resorption and bone formation (i.e. bone remodeling process) is required to maintain bone health. However, a high remodeling rate, or an imbalance between formation and resorption, as well as suboptimal nutrient intake are known to contribute to fracture risk and bone dysfunction. Gut-derived hormones represent an important link between nutrient intake and bone remodeling (i.e. gut-bone axis). A sustainable nutritional intervention that positively modulates the postprandial responses of gut-derived hormones and the linked bone remodeling processes is an attractive option for the optimization of bone health in young adults. The proposed nutrient intervention seeks to explore the bioefficacy of a combination plant-based protein and marine-based multi-mineral supplement following oral ingestion in young, healthy men and women. A postprandial time-course study will be undertaken to examine the acute effects and/or associations between different gut-derived hormones and biomarkers of bone metabolism.
The purpose of this study is to determine the effects of a single dose of non-steroidal anti-inflammatory drugs on post-exercise markers of bone and muscle metabolism.
The study was conducted on 20 immediate implant placement sites in the anterior maxillary region. In the study group, 10 implants were inserted using socket shield technique, while in control group, 10 implants were inserted using conventional immediate placement technique. All patients received immediate and 6 months post-operative CBCT to assess horizontal bone loss, vertical bone loss, and measurement of bone density. Implant stability quotients (ISQs) was measured immediately, 1st, 3rd and 6 months post-operatively.
this study aims to evaluate horizontal bone augmentation achieved at the anterior maxilla using computer-guided cortical shell bone technique and accuracy of fixation of the bone shell away from the atrophic ridge by a calculated distance which is always a challenging step for inexperienced surgeons to fix a cortical shell at the ideal position in the conventional protocol it was never guided to be precisely fixed at the proper position and angulation the problem is if it fixed with insufficient distance with proposed volume loss leads to totally insufficient volume gain for future implant placement also to evaluate the efficacy of the CAD/CAM surgical guide during chin harvesting procedures in reducing the risk of anatomical structure damage and patient morbidity with more accuracy compared with the standard technique. this trial versus free hand conventional cortical shell bone technique both harvested from symphysis area (chin).
In this study, concentrated growth factor obtained by centrifuging the patient's own blood and advanced platelet-rich fibrin liquids were applied to the implant cavity and surface. Thus, it was aimed to ensure that the osseointegration process would start earlier by ensuring a faster arrival of growth factor and healing mediators in the region, and thus, the time waited for the osseointegration process and the loading of the superstructure would be shortened. In this split-mouth study, a total of 32 patients including two separate study groups in different patients and a control group were included. While the CGF liquid was applied to the implant cavities and surfaces prepared in the study group of 16 patients, A-PRF liquid was applied to the study group of the other 16 patients. Conventional implant application was performed in the control groups of both groups. The torque values during the implantation were also recorded, and Resonance Frequency measurements were performed immediately after implantation with the Penguin RFA device and at postoperative weeks 2, 4, 6 and 12.
Platelet concentrates obtained from blood have been used as regenerative biomaterials in periodontal surgery. Along with the migration and proliferation of osteogenic cells, platelets accelerate bone regeneration by increasing the formation of blood vessels and inducing inflammatory reactions. Experimental studies revealed that growth factors released from platelets enhance osteoblastic differentiation on the implant surface, and enlarge the contact surface of the bone and implant. Platelet-rich fibrin (PRF), a platelet concentrate, was introduced by Choukroun in 2001, and it contains a significant amount of cytokines. Advanced-platelet rich fibrin (A-PRF), discovered in 2014, is a PRF derivative with a denser leukocyte concentration and a softer consistency. Concentrated growth factor (CGF), another platelet derivative, differs from A-PRF since it contains many concentrated growth factors trapped in a more rigid fibrin structure. It was reported that both A-PRF and CGF, obtained with variable centrifuge speeds, accelerated the proliferation and differentiation of bone cells. Stimulated osteoblasts and osteocytes initiate the remodelling process by producing macrophage colony-stimulating factor and receptor activator of nuclear factor-kappa B ligand (RANKL).Previous studies reported that TNF-α initiated bone resorption independently of RANKL.Osteoprotegerin (OPG) is a soluble cytokine receptor of the TNF family and is produced by osteoblasts, fibroblasts, and a number of host cells. OPG binds to RANKL and prevents the RANKL-RANK interaction Therefore, it inhibits osteoclastic activity. The RANKL/OPG ratio is used as an indicator for estimating bone remodelling, osteoclastic activity, or osteogenesis. The interactions among cytokines, growth factors, chemokines, and chemical mediators during blood clot formation result in a complex signalling process. High concentrations of cytokines and growth factors in the wound promote the migration of macrophages, neutrophils, and lymphocytes. Therefore, it was reported that the cytokines released from the fibrin matrix might affect those signaling pathways. In this study, investigators hypothesised that the application of CGF or A-PRF in dental implantation would contribute to inflammation, proliferation and the remodeling process. Therefore, the aim of this study was to investigate the effects of CGF and A-PRF on the osseointegration of dental implants in clinical, radiographic, and biochemical aspects.
According to previous scientific evidence lining on biological concept of bone regeneration into the maxillary sinus, an observational study was set up to record possible (hypothesized) difference in bone formation between different width of the maxillary sinus itself. Therefore, a multicenter study was set up that foresaw a surgical intervention of sinus lift with lateral approach, the 6 months healing phase, the implant insertion in two sites with the implant site preparation made by a trephine bur to retrieve a bone specimen for histomorphometric examination without any additive invasively for the patient.