Reduction of precocious peri-implant resorption cone.

Aim: After implant-insertion, bone tissue, newly-formed on peri-implant crest, undergoes to a mild marginal osseous readjustment due to build-up of inflammatory cell tissue (ICT). The present study verifies the possibility to limit bone resorption by placing implant fixtures 0.5 mm outside cortical bone edge.

Experimental analysis about the evaluation of tungsten carbide-bur, piezoelectric and laser osteotomies.

Aim: Osteotomies are performed in oral surgery with five kinds of cutting instruments: 1) burs (Tungsten carbide cylindric burs), 2-3) ultrasound Piezosurgery (type I and II), 4-5) and lasers (Er:YAG; Er,Cr:YSGG). This study compares the quality of cutting of every single instruments, evaluating accuracy (length, thickness, depth and morphology), velocity (number of passages and time) and entity of damage.

Methods: In vitro experiments with ten osteotomies were performed on one-hundred of cow ribs with each instrument.

Expression of Vascular Endothelial Growth Factor (VEGF) mRNA in healthy bone tissue around implants and in peri-implantitis.

Peri-implantitis is an inflammatory process involving peri-implant bone. Angiogenesis is critical for the development, remodeling and healing of bone. Vascular Endothelial Growth Factor (VEGF) is a glycoprotein that induces endothelial cell proliferation, angiogenesis and capillary permeability.

Calcium sulfate barrier for regeneration of human bone defects. 3 years randomized controlled study.

Several experimental studies have been performed in order to evaluate the behavior of different types of biomaterials involved in the process of tissue and bone regeneration. The guided bone regeneration (GBR) principles are applied in the rebuilding of periodontal tissues, damaged by the periodontal inflammatory process. Since the introduction of GBR biological principles, a wide range of materials have been tested and used as a physical barrier.