View clinical trials related to Atrophic Maxilla.
Filter by:The objective of this randomized controlled clinical trial was to evaluate the effects of particulate xenogeneic bone grafts associated with autogenous bone graft or Leukocyte-and-Platelet-Rich Fibrin (L-PRF) for horizontal alveolar ridge augmentation. Twenty-eight patients presenting edentulous regions and requiring horizontal bone augmentation prior to dental implant placement were included in this study and randomly divided into two groups according to the proposed guided bone regeneration (GBR) treatment. Fourteen surgical sites corresponding to Group A received bone regeneration with particulate autogenous bone tissue associated with deproteinized bovine bone graft (Bio-Oss Small®; Geistlich AG, Wolhusen, Switzerland). In Group B, fourteen surgical sites were regenerated with deproteinized bovine bone graft (Bio-Oss Small®) associated with L-PRF. In both groups, the grafted region was protected by a collagen membrane (Bio-Gide® Compressed; Geistlich AG, Wolhusen, Switzerland) fixed to the buccal and palatal bone plates using titanium pins. Cone-beam computed tomography (CBCT) scans were performed preoperatively, immediately after the GBR surgical procedure, after 8 months of GBR healing, and immediately after dental implant placement to measure linear and volumetric changes in the alveolar ridge. At the time of dental implant placement, after an average period of 8 months following the guided bone regeneration procedures, bone biopsies were taken from the grafted area for histological, histomorphometric, and micro-CT analysis. After a period of 6 months, the dental implants were reopened to receive implant-supported prosthetic rehabilitation. Implant stability was assessed using resonance frequency analysis at the time of implant placement in the grafted area and after an average of 6 months during the reopening surgical stage. Patient pain perception following bone regeneration procedures was assessed using a visual analog scale. All obtained data were statistically analyzed.
Evaluation of computer guided placement of Zygomatic implants utilizing intra sinus versus extra sinus surgical approach for the reconstruction of atrophic maxilla. The expected benefit from the current study is to select the most suitable approach for Zygomatic implant placement with the least postoperative complications
The atrophatic anterior maxilla present a considerable challenge for both surgical and prosthetic rehabilitation, as it may require bone augmentation to enable implant placement. The techniques proposed for vertical augmentation of the alveolar ridge include distraction osteogenesis, only grafting, and sandwich osteoplasty. Sandwich osteotomy is reported to provide more stable and predictable results with respect to the height of the alveolar ridge. The main advantage of osteotomy techniques that employ Interpositional bone grafts is reported to be the improved blood supply in the augmented region.
The objective of study is to evaluate the influence of the use of Platelet Rich Fibrin (PRF) from the patient's produced by a new horizontal centrifugation protocol associated with particulate xenogenous bone graft in the rehabilitation of atrophic maxillary sinus for early osseointegrated implants plancement. In a split-mouth model, twelve patients in need of rehabilitation with at least two bilateral implants in the regions of atrophic maxillary sinus will simultaneously undergo bone reconstruction using deproteinized particulate xenogenous bone (Bio-Oss Small®; Geistlich AG, Wolhusen , Switzerland). Randomly, one of the surgical sites of each patient will be reconstructed using the associated technique of solid PRF + Liquid PRF with the xenogen material, where at the end of the grafting procedure, both sites will be protected by a collagen membrane (Bio-Gide® Compressed; Geistlich AG, Wolhusen, Switzerland) positioned over the surgical access of the maxillary sinus. During the research, cone-beam computed tomography scans will be performed preoperatively, immediately after surgical procedure, 3 months after maxillary sinus reconstruction, after immediate implants placement and 12 months after functional load of the implants for comparative volume measurement of tissue gain and the maintenance of the grafted tissue. During the implant surgery, bilateral biopsies will be collected after 4 months of the regenerative surgical procedure during the early dental implants surgery by virtually guided surgery. The stability of the implants will be measured by means of resonance frequency analysis (ISQ) after the immediate postoperative period and 6 postoperative months as the clinical success rates of the implants after 12 months with functional load. The tissue samples will be used for histological, histomorphometric, immunohistochemistry and microtomographic analysis. All data obtained will be statistically analyzed.
Assessment of bone quality and quantity for three dimensional bone augmentation for maxilla using titanium meshes loaded with bone marrow aspirate mixed with xenograft versus xenograft mixed with autografts only
The aim of the present study is to clinically and radiographically evaluate the effect of the use of recently developed Smart Box accompanied with OT Equator attachment in retaining of the inclined implant assisted overdenture for atrophic maxilla and to compare the vertical bone changes around axial implants with OT Equator attachment and inclined implants with smart box attachment radiographically using CBCT
A split-mouth design study will be performed regarding the use of platelet concentrates on ridge preservation: L-PRF vs A-PRF vs control. Patient needing multiple teeth extractions in the upper jaw (single-rooted teeth) will be recruited. The use of each platelet concentrate or control will be randomized by means of a computer program. The results will be analysed clinical and radiographically (CBCT). When the subject will choose for implant rehabilitation, a biopsy will be taken in the site of the preserved sockets. The region will be localized with a customized stent, fabricated with the position of the extracted teeth. VAS scales will be provided to evaluate the post-operative discomfort.