Active clinical trials for "Bone Resorption"

The study evaluated the effect of local application of simvastatin around immediate implant on the amount of gap fill, ridge dimensional alterations and bone density in humans.

This study will be an open, prospective, split-mouth, randomised controlled clinical trial. A total of 14 patients searching for oral implant treatment and where a GBR procedure is indicated per implant treatment will be enrolled. All patients have to fulfill all of the inclusion criteria and none of the exclusion criteria. From all patients clinical photos will be taken. Two sites within a patient will be randomly allocated to the 'autologous bone chips and DBBM or 'DBBM particles alone' group. The study will be 1 year follow-up study comprising 9 visits

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.

The objective of the study is to investigate whether blood markers can be used to predict the development of bone metastases and to assess the efficacy and safety of zoledronic acid in cancer treatment induced bone loss.

The aim of the present study was to compare the half-packed grafts that are covered with either a collagen or a nonresorbable membrane to the conventional alveolar ridge preservation procedures involving full-packed grafts and collagen membrane. The primary purpose was to evaluate the bone dimensional changes between the groups, and the secondary objective was to assess the potential contributing factors to clinical, radiographic and implant-related outcomes under different alveolar ridge preservation procedures.

The purpose of this clinical and radiographic study will be to determine what influence on marginal bone loss has the thickness of soft tissues and the height of the prosthetic abutment and eventually determine which of the two factors is the most important.This research was designed as a multicentre cohort study. Two clinical centers will treat patients through the placement of a single dental implant. The implants will be prosthetically loaded about 4 months after placement and periapical radiographs will be acquired at each time-point.

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.

Hard and soft tissue deficiencies of an alveolar ridge arise as sequelae of tooth extraction when socket preservation is not applied. In addition, extraction of posterior maxillary teeth causes pneumatization of the maxillary sinus in relation to other fixed landmarks such as the teeth. These anatomic sinus limitations and alveolar bone deficiencies are the main challenges for dental implant placement. Different bone substitutes have been used to augment bone in pneumatized maxillary sinuses. Scaffolding materials such as xenografts or synthetics substitutes have been proven to be a viable alternative. Xenografts are obtained from nonhuman species and serve as a scaffold for the formation of new bone (osteoconduction). Histologic evaluation of maxillary sinuses grafted with xenografts revealed newly formed bone to be mostly woven bone with some remodeling to lamellar bone. These histologic findings reaffirm the osteoconductive ability of xenografts when used as the sole grafting material in maxillary sinus augmentation. Xenografts appear to be an effective method for maxillary sinus grafting and demonstrate limited resorption over time. Sinuses augmented with synthetic bone substitute (SBS) also appear to successfully integrate based on recent histomorphometric studies. Vascularization and trabecular bone formation in sinuses grafted with SBS has been previously demonstrated. One type of SBS includes porous granules of bioactive and resorbable silica-calcium phosphate nanocomposite (ShefaBone). ShefaBone grafts offer a novel alternative that can potentially unite the 3 salient bone-forming properties (osteoinduction, osteoconduction, and osteogenesis). ShefaBone has unique properties including: 1) bioactivity 2) bioresorbablility, and 3) allowing for the uptake of calcium ions from the physiological solution and releasing phosphate and silicate ions which aid in bone formation. A material with such properties will substitute bone in a more controlled and effective combination that can be obtained in many clinical situations, without the disadvantages found with autograft. ShefaBone has demonstrated successful regenerative properties for bony defects. To our knowledge, there is no reported clinical studies on the use of SCPC material to graft a pneumatized maxillary sinus. This aim of this current study is to compare SCPC to commonly used xenograft material in an augmented maxillary sinus.

Women and men consuming a low protein diet may be at risk for bone loss. The purpose of this study is to determine whether a daily protein supplement will improve bone health among healthy older adults.

This randomised double blind, placebo-controlled study examined the effects of post-exercise consumption of whey protein (PRO) or carbohydrate (CHO) on performance recovery, muscle damage and inflammatory cytokine responses following a high intensity interval swim (HIIS) in 10-17-year old male and female swimmers.