[Vertical ridge augmentation using a microplate in conjunction with a Gore-Tex membrane. A case report]. / Aumento verticale della cresta alveolare mediante utilizzazione di una micropiastra in combinazione con una membrana barriera Gore-Tex. Tecnica chirurgica.

Oral implantology is considered an acceptable treatment modality to replace missing teeth when a recipient site with a sufficient horizontal and vertical bone volume exists. Guided bone regeneration is based on the principle of selective exclusion of non osteogenic cells from the bony defect by a barrier membrane. Several supporting systems of the barrier membrane have been successfully used to treat non space-mantaining de-fects. A 35-year-old female affected by a partial edentulism in the molar area of the right mandible showed 8 mm of bone height of the residual ridge above the alveolar canal. A vertical ridge augmentation was performed using a Gore-Tex membrane in conjunction with a microplate and an irradiated freeze-dried cortico-cancellous allograft. Six months after the surgical procedure a 11.5 mm by 5 mm threaded implant was placed into the regenerated bone. After three months of healing, the implant was uncovered and considered integrated. Before the implant placement, a biopsy of the regenerated bone was arried out by a triphine. The histological examination of the bony core showed the attainment of biological goals of guided bone regeneration. The surgical technique followes in this case report has been effective in regenerating a vertical bone volume sufficient for implant treatment.

Distal extension mandibular removable partial denture connected to an anterior fixed implant-supported prosthesis: a clinical report.

This clinical report demonstrates the possibility of achieving positive results with a removable prosthesis connected to an implant-supported fixed prosthesis. Bone quality and quantity at the implant sites are essential requirements for the success of the treatment. The support of the RPD and its connection with the fixed prosthesis creates stability during chewing activity and allows a functional activity similar to that involving an overdenture. The adoption of an occlusal scheme with subocclusion of the fixed prosthesis contacts compared with those of the removable prosthesis, together with the stress-director system of the RPD can be effective factors that decrease the risk of loss of implant integration. Further long-term follow-up studies with a larger patient population are needed to confirm the clinical and biomechanical validity of the prosthetic solution described in this clinical report.