[Comparative clinical and histological studies on keratinized and non-keratinized tissues transplanted onto the periosteum and the denuded alveolar bone].

Our clinical and histological investigations in humans and beagle dogs in a unilateral trial with free and pedicled grafts applied to the periosteum and to exposed alveolar bone established that from the clinical aspect it is better to place the graft on the exposed bone to obtain a firmly fixed base instead of a movable periosteal one.