Histological evaluation of periodontal ligament in human after orthodontic treatment with piezosurgery and monolateral tooth dislocation and ligament distraction technique: a first morphologic and histologic evaluation.

Traditional orthodontic tooth movement is based on the concept that application of a protracted force causes alveolar bone remodelling and adaptive changes in periodontal and dental tissues. Thus, if orthodontic tooth movement is described as a biological bone reaction to orthodontic forces mediated by the periodontal ligament (PDL), this event involves a series of sophisticated signal transduction processes that allows the PDL compression with specific histologic and biomolecular modifications. However, the preservation of the integrity of the PDL is generally difficult to achieve when it is associated with a long duration of orthodontic treatment. A total of 20 Caucasian patients with different dental-skeletal were treated using the Monocortical Tooth Dislocation and Ligament Distraction (MTDLD) technique with Piezosurgery associated with morphologic and histological evaluation of the PDL. The histological results obtained, confirm a good clinical outcome with an improvement of the speed on orthodontic treatment without any signs of tissue injury of PDL fiber without areas of hyalinization. The data suggests that MTDLD with Piezosurgery seems to be a valid alternative to the traditional orthodontic movement in adult patients preserving the anatomy and the integrity of PDL.

STABLE: an innovative device for three-part maxillary osteotomy.

Le Fort I osteotomy of the maxilla continues to be one of the most common techniques used in the surgical correction of a variety of dento-midfacial deformities. Occasionaly, however, surgeons may encounter difficulties during three-pieces Le Fort I procedures because the surgical movements are also prone to adverse movement and subsequent relapse. This case report describes a 26 year old man, who presented with a skeletal Class III malocclusion and a transverse maxillary deficency. The malocclusion was corrected with a bilateral sagittal split osteotomy (BSSO) and a segmental Le Fort I and post-treatment stabilization was achieved with the STABLE (Surgical Tripartition Auxiliary Block Element), a new and innovative device usefull after three-part maxillary Le Fort I surgery.