Histologic and Histomorphometric Analyses of Free Gingival Grafts After Mechanical Expansion: A Study in Dogs.

This study assessed the histologic and histomorphometric changes of free gingival grafts in a canine model after mechanical expansion. A total of eight epithelialized tissue samples were obtained from the palate of eight Beagle dogs. Samples were cut in half and separated into two groups: the test group, in which a device was used to expand the grafts, and the control group, without expansion.

Bone demineralization promotes superior spread of preosteoblast in culture.

Previous studies have shown substances capable of similar effects of demineralization, accelerating the process of bone remodeling. This study investigated preosteoblasts behavior in cell culture after bone demineralization with citric acid and tetracycline. Seventy-four Wistar rats provided 144 calvarial bone samples, 126 of which were randomly divided in seven groups according to the treatment given to the surface: no demineralization (C), citric acid (CA), tetracycline (TCN) during 15, 30, and 60 s.

Bone Graft and Substitutes Associated with Titanium Dome for Vertical Bone Formation in Osseointegrated Implants: Histomorphometric Analysis in Dogs.

Purpose: This animal study investigated vertical bone formation (VBF) around implants and used histomorphometric analysis to compare different bone-filling materials associated with a massive titanium dome as a tissue barrier.

Materials And Methods: Seven dogs were submitted to surgical procedures with extraoral access to the lower edge of the mandible, and four implants were semi-inserted in each animal. Each implant received one treatment: autogenous bone with clot (AB), control clot (C), synthetic graft (Biogran [BG]), or xenograft (Bio-Oss [BO]).

Viability analysis of subepithelial connective tissue grafts subjected to a mechanical expansion process: a histologic study in dogs.

The aim of this study was to histologically evaluate the viability of mechanically expanded subepithelial connective tissue grafts. Sixteen samples of palatal connective tissue were collected from eight beagle dogs. Half of the samples were subjected to the expansion procedure and used as subepithelial grafts in the canine region, and the samples not subjected to expansion were grafted at the contralateral side.