Active clinical trials for "Alveolar Bone Loss"

This study aims to evaluate bone formation in grafts in terms of its quality (density), quantity (volume) and maturation obtained with the application of a tissue-engineered bone grafting compound containing concentrated autogenous cell-culture medium (CM) and a synthetic bone substitute. The present study was designed as an experimental prospective split-mouth randomized controlled clinical trial. After protocol approval by the Research Ethics Committee, a total of 20 consecutive participants in need of maxillary reconstruction aiming implant-supported oral rehabilitation will be invited to join the study. To collect autogenous adipose tissue-derived mesenchymal stem cells (hASCs), an outpatient lipoplasty procedure at the abdominal area of each patient will be performed. To isolate and expand hASCs from the lipoaspirate, specific cell culture protocols will be followed, resulting in cultured viable cells and their conditioned medium (CM). Cells and CM will be then separated by a sequence of filters and centrifugation, and isolated CM will be frozen. ELISA will analyze the presence of chemokines and their concentration in CM before grafting. Following pre-op surgical planning, both maxillary sinuses of each patient will be grafted internally applying a lateral window to each sinus. The bony floor of the test maxillary sinus will be augmented with synthetic bone substitute (BoneCeramic™ 1-2 mm) mixed with 10 to 15 ml of CM (test). The control site will receive bone substitute with saline. Lateral windows in both sinuses will be then closed with a collagen membrane (Bio-Gide™). After 6 months, first-stage implant surgery will be performed placing 6 implants in each patient. Registration of implant stability by manual torque wrench will be performed. Also, bone biopsies from each drilled implant site will be collected for histology, histomorphometry and immunohistochemistry (RT-PCR). Tomographic evaluation of the bone formation will include cone beam computed tomographies (CBCTs) at pre-operative [Baseline], 90 [T1] and 180 [T2 = implant placement] days for bone 3D image analysis.

The aim of this trial is to compare whole-tooth vs particulate dentin for their effects in alveolar ridge preservation.

Tooth extraction triggers a cascade of biological events mediated by both the local inflammatory response that follows the surgical intervention and the deprivation of masticatory stimulation of the periodontium, which elicit an alteration of the homoeostasis and structural integrity of the periodontal tissues. Bone remodeling kicks off after tooth loss and continues for several months with most changes taking place in the first three months. Interestingly, Schmidt-Schultz and Schultz, found that intact growth factors are conserved even in the collagenous extracellular matrix of ancient human bone and teeth. Thus, the application of stored dentin may have similar benefits as fresh dentin, preserving intact growth factors for a prolonged period avoiding the need to perform multiple surgical interventions simultaneously. The volume of the particulate dentin is more than twice of the original root volume. Thus, the idea of using autogenous stored mineralized dentin grafts (ASMDG) in ARP evolved.

Dental implants have become one of the most common treatments used for the rehabilitation of lost teeth. The success rate of dental implant treatment is quite high. One of the criteria used for long-term implant success is the evaluation of radiographic marginal bone loss. Implants are used at the bone and tissue level in implant treatment. In this study, it was planned to use 20 implants of the same brand, with a single implant in the bilateral posterior regions in 10 patients.The study will be designed as split-mouth. The implant will be placed at the bone level with the same protocol in the two edentulous areas and the flap will be closed primarily. After 3 months, the substructure of the two-piece abutment concept system will be placed in a region during the healing head placement stage, and the bone level implant will be converted to the tissue level. A conventional healing cap will be placed in the other area. Periapical radiographs will be taken from the patients who participated in our study, as in all implant patients, during the pre-surgical planning phase and after implant placement. With the control periapical radiographs to be taken as a result of one-year follow-up, the marginal bone loss amount in the implants will be evaluated using soft-ware. Clinical measurements will be taken in all patients at the prosthetic loading session and 1 year after loading.

Atrophied jaw is a condition where there is insufficient bone quantity to place root form implants. Several treatment plans are available for treating atrophied jaws, including subperiosteal implants. Subperiosteal implants were introduced in the last century. Poor clinical results led those implants to be progressively abandoned. Recently, several Authors suggested a revival of subperiosteal implants as an alternative to regenerative procedures.

The purpose of this study is to evaluate the survival rate of 5 mm short implants compared to longer implants (10 mm) placed in sinus-grafted sites. Primary aim: Compare bone loss between the two groups Secondary aim: Compare surgical time and patient-reported outcomes (satisfaction and post-operative pain)

Investigation of the volume stability of the alveolar ridge, the bone structure and soft tissue appearance at a delayed dental implantation using two bone substitute materials (1. Human-Spongiosa, gefriergetrocknet, CHB; 2. collacone®)

For patients having periodontal intrabony lesions, three treatment modalities were executed to evaluate the effect of protecting Leukocyte rich -Platelet Rich Fibrin harvests (applied in the bony defects) with resorbable collagen membranes. Clinical Outcomes recorded were the Plaque index (PI), Gingival index (GI), probing depth reduction (PD), Clinical attachment level (CAL), and radiographic defect depth changes. For the biochemical evaluation: levels of PDGF-BB and VEGF obtained from crevicular fluid by Perio-Paper strips were assessed using ELIZA.

The purpose of this randomized clinical trial was to evaluate the effect of cortical bone decortication on the angiogenesis and osteogenesis of augmented ridge by GBR.

Aim: dis double-blind split-mouth clinical trial study was performed to evaluate teh clinical and radiographic effect of local delivery of lovastatin gel as an adjunct to scaling and root planning (SRP) in teh treatment of chronic periodontitis. Method and Materials: 15 patients with two mandibular molar teeth with probing depth (PD)≥3 mm, clinical attachment level (CAL)≥3 mm and bone loss more than 3 mm according to parallel periapical x-ray and distance from CEJ to alveolar crest, were selected.Totally 24 mandibular molars were selected for teh study. Clinical periodontal parameters included PD, CAL, bleeding index(BI), plaque index(PI) were recorded for teh selected teeth at baseline and at 1,3 and 6 months. Radiographic assessments were performed at baseline and after 6 months. At one side teh pockets around randomly selected molar were injected with a blunt syringe filled with lovastatin gel 1.2%( case group=B), and on teh other side, teh pockets were filled with a placebo gel by a blunt syringe ( control group=A).Two-way repeated measure ANOVA test and T-test were used for statistic analysis Spss 23.( P<0.05) was considered significant.