[Orthodontic preparation for orthognathic surgery. Various specific points].

Orthodontic preparation before orthognatic surgery must straighten teeth alignment to enable correct adaptation of the upper and lower arches. It must also rectify dento-alveolar abnormalities partially responsible for the dysmorphosis and which can hinder smooth articulation of the bones. Thus before and after the operation, the orthodontist will have to prepare and monitor the surgical splints used in posterior deficiencies.

[Mandibular condyle hyperplasia. Therapeutic review].

Excessive cartilage growth on the condyle process of the mandible can result from primary hyperreactivity of the growth cartilage or be a secondary adaptation to an imbalance in occlusive and/or cervicofacial conditions. Treatment depends on the distinction between these two forms. Primary active overgrowth is treated by condylectomy sparing the distal apparatus although conservative surgery to re-centering the temporomandibular joint and re-establish symmetry without condylectomy may be used in quiescent moderately active forms saving the joint.

[Orthodontic repositioning technic of impacted lower 2nd molars].

Author explains an orthodontic appliance which permits uprighting of horizontal impacted mandibular second molar teeth, associating a mandibular anchorage and an uprighting auxiliary spring. The anchorage consist in a Mollin lower lingual arch. The auxiliary spring will upright the tooth in two steps.

[Schuchardt's procedure and surgery of open bite].

Posterolateral segmentary maxillary impaction osteotomy has a role to play in the treatment of gaps between the upper and lower jaws. It has several advantages, especially an uncomplicated postoperative period and the single-maxillary contention it provides. The indication must be established after an articulator assessment in order to take into account the mandibular protrusion caused by autorotation and to prevent a sagittal shift.