SBR magazine December 2012
No. 20/2

summary

• Class III orthopedics and maxillary growth. C. Benyounes-Uzan
• Transverse maxillary osteodistraction associated with orthognathic surgery: new tools for one-stage surgery. P. Leyder, G. Wycisk, J. Quilichini
• National Conference in Marseille, September 14-16, 2012. Main theme…/ A. Chays
• Towards the disappearance of brackets? / J. Philippe
• The PUL (Universal Light Propulsor): 10 years of use by 2 practitioners / A. Firmin-Vincent, É. Allouch
• Today's obligations, tomorrow's security (4) / A. Béry

Class III Orthopedics and Maxillary Growth by C. BENYOUNES-UZAN

Heavy orthopedic treatments and surgery are often offered as the only therapeutic solution to resolve mandibular prognathism and maxillary hypoplasia.

Reverse bites are detectable very early in childhood, even in the primary dentition stage.
Numerous authors, including Miyama and McNamara, have shown that without treatment, maxillary retrusion does not improve over time, while mandibular protrusion increases. This invariably leads to a worsening of the initial skeletal disharmony.

Parents generally realize quite early on that there is a problem with their child's jaws, and intervention is necessary from that point on.
A loss of vertical dimension of occlusion due to bilateral posterior edentulism results in Class III intermaxillary relationships, as is often the case in the elderly, even though they are no longer growing.

In growing children, increasing the occlusal height by raising the posterior teeth will help to slow down mandibular advancement and promote maxillary growth.

Transverse maxillary osteodistraction associated with orthognathic surgery: new tools for one-stage surgery by P. LEYDER, G. WYCISK, J. QUILICHINI
Severe transverse maxillary deficits in adults are traditionally treated in two stages when associated with complete sagittal and vertical dysmorphosis.

Transverse correction is initially performed using surgically assisted osteodistraction; then a second surgical correction of other spatial anomalies is carried out.
The authors describe a technique that allows for simultaneous transverse correction by osteodistraction and complex maxillary and mandibular surgery.

To this end, two new tools are presented: sliding maxillary plates and a modular distractor with bone or tooth support.
All patients achieved consolidation, and we corrected the transverse defect as predicted in the preoperative setup. The results of the distraction are quantified using study models and/or CT scans.

We present two patients operated on using this new strategy.
This is an innovative approach that allows for the positioning, in three dimensions of space, in a single surgical procedure, of a maxillomandibular dysmorphosis with endomaxillary resection.

Towards the Disappearance of Brackets? by J. PHILIPPE
Techniques based on the use of brackets are rightly considered the best mechanical orthodontic treatment techniques. However, they have numerous drawbacks, particularly poor intercuspation on the lingual side. It can be assumed that, given the increasing demands of practitioners, these techniques will be replaced by devices specifically adapted to each type of tooth movement and, to restore alignment and intercuspation, by an elastic positioning method.

The PUL (Universal Light Propulsor): 10 Years of Use by 2 Practitioners by A. FIRMIN-VINCENT, É. ALLOUCH.
Designed in 1997 by Élie Callabe, orthodontist, and Jean-Charles Morin, orthotist, the PUL, or Universal Light Propulsor, was first presented in France in 2001, after four years of clinical and technical validation.
Originally used in the treatment of Class II malocclusions, it has benefited from technical improvements that allow for correction in the sagittal, vertical, transverse, and functional dimensions, earning it the name "4D Harmonizer."

The PUL system allows for gentle, physiological propulsion, granting a wide range of motion to the temporomandibular joint (TMJ) and its meniscus, both laterally and, more importantly, in retroposition thanks to the mandibular springs. Indeed, with each swallow (2,000 times a day), the condylemus can reposition itself within its glenoid fossa, thus maintaining a functional TMJ, relieving ligamentous tension, and reducing the risk of inflammation, leading to improved condylo-mandibular growth.