Ricerc@Sapienza

Aim: To present a minimally invasive approach to solve the impaction of palatal canines using computer-guided orthodontic miniscrews. Materials and methods: Miniscrew-supported appliances for palatal canine disimpaction are performed with CAD/CAM technology. With adequate software, it is possible to match the STL files of the dental arch with the DICOM images of the maxilla, previously transformed into STL files. The ideal points for miniscrew insertion can be identified on the STL 3D model file on the basis of the width and thickness of the palatal vault.

AIM:

An orthodontic treatment is described that combines the use of clear aligners and computer-guided piezocision to overcome the drawbacks of traditional corticotomy in accelerating orthodontic tooth movement. The relapse at the 2-year follow-up was also evaluated.
MATERIALS AND METHODS:

BACKGROUND AND OBJECTIVES:
Some authors have recently postulated the possibility of a unilateral contraction of the palate in patients with crossbite. This study aimed to investigate palatal dimension size and morphology in subjects with functional posterior crossbite and to localize location of the contraction through a 3D analysis procedure.

Background: During rapid maxillary expansion (RME), heavy forces are transmitted to the maxilla by the anchored teeth causing buccal inclination and buccal bone loss of posterior teeth. Objective: To systematically review the literature in order to investigate whether RME causes periodontal sequelae, assessed by cone-beam computed tomography (CBCT). Search methods: Fifteen electronic databases and reference lists of studies were searched up to March 2017.

OBJECTIVES Realize a historical excursus of corticotomy technique, explaining its biological mechanisms and describing modified and improved surgical approaches over the years. MATERIALS AND METHODS A search for literature on different databases was conducted by crossing the keyword “corticotomy” with:“orthodontics, accelerated tooth movement, techniques, piezocision and corticision”. RESULTS 180 articles were included. The biological response to corticotomy is a local transitory osteopenia, able to accelerate dental movement through the application of orthodontic forces.

The aim of this report was to describe a new computer-guided technique for a controlled site preparation and palatal orthodontic miniscrew insertion using a dedicated software. A surgical guide was designed after planning the appropriate insertion sites on three-dimensional images created by the fusion of cone-beam computed tomography (CBCT) and digital dental model images. Pre- and postoperative CBCT images were compared and the angular, coronal, and apical deviations between the planned and the placed miniscrews were calculated.