[Contribution of 3D imaging using 3DNEO(®) software in surgical-orthodontic treatment of impacted teeth].

Objectives: The aim of this investigation was to present and evaluate an original method of mini-invasive oral surgery and orthodontics based on 3D images from a computed tomography software (3DNEO(®), 3DNEOVISION).

Materials And Methods: Three patients with impacted teeth were examined and their data were analyzed with this software based on the "region growing" method.

Results: Several clinical interests emerge : locate and visualize precisely the relationships of the impacted tooth with the adjacent anatomical elements under the desired angle, associate/dissociate the different elements of the 3D scene, measure the distances, calculate the axes of traction, materialize the way of traction and the optimal point for bonding, prepare virtually the surgical exposure and orthodontic treatment plan.

[One phase or two-phase orthodontic treatment: comparisons].

Introduction: The optimal timing for starting an orthodontic treatment is discussed by many authors. This is even more difficult that there are different therapeutic approaches. In case of Class II, division 1 malocclusion, one approach consists of realising an early treatment during mixed dentition, then a surveillance phase and finally an alignment phase during adolescent dentition.

[Accelerated tooth movement by alveolar corticotomy or piezocision].

The relatively recent introduction of corticotomies and piezocision has made it possible for orthodontists to accelerate tooth movement and thereby to shorten the length of orthodontic treatment. Specialists emphasizing a mechanistic concept have been debating the underlying basic biological mechanics of these new therapeutic tools with opposing specialists who support a biological conception. Our analysis of different publications on the subject suggests that the biological explanation, with its emphasis on the Regional Acceleratory Phenomenon (RAP), is correct.

[Dento-facial orthopedics and osteopathy].

Osteopathy has grown rapidly. Given their common action on children and adolescents, the collaboration between dentofacial orthopedics and osteopathy is increasingly common. It therefore becomes necessary and urgent to investigate whether, based on data acquired from science, there is evidence of possible interrelations between the two disciplines.

[Early treatment of Class III: a long-term cohort study].

The aim of this comparative retrospective short- and long-term study was to evaluate the interceptive treatment in Class III malocclusion in daily orthodontic practice. The sample was composed of 69 children divided into two groups according to the interceptive treatment applied: 31 children in group F (facial mask) and 38 in group M (interceptive fixed appliance). A Pancherz cephalometric analysis was carried out on the lateral head films at the start of the study (t(0), after the active treatment (t(1) and 29 months after t(1) (t(2).