[Combined use of Beneslider and lingual braces, mechanical aspects and procedures]. / Utilisation combinée du Beneslider et d'appareils multi-bagues linguaux, mécaniques et procédure clinique.

Over the last years, a tendency to prefer purely intra-oral appliances with minimal need for patient cooperation is noticed if upper molars should be distalized. Unfortunately, most of the conventional devices for non-compliance upper molar distalization produce unwanted side effects such as anchorage loss. To minimize or eliminate anchorage loss, mini-screws attracted a great attention in recent years because of minimal surgical invasiveness and low cost. Using the anterior palate as an insertion site, the failure rate is extremely low, there is no risk of root damage and the appliances are out of the path of tooth movement. Based on comprehensive clinical documentation, the rational and practical applications of the Beneslider in combination with lingual braces are presented. By this procedure, extractions in the upper arch and reactive forces in the lower arch resulting in a protrusion of the incisors can be avoided with an invisible treatment appliance.

[Improvement of mini-implant stability in orthodontics]. / Amélioration de la stabilité des mini-implants orthodontiques.

Orthodontists are continuing to increase the use of mini-implants as a source of skeletal anchorage. However, the relatively high 16.4% rate of their failures remains a problem. An analysis of articles in the literature on the loss of mini-implants shows that larger size anchorage screws and plates inserted in the anterior and median regions of the hard palate are highly stable and, accordingly, contribute to a high rate of optimum orthodontic outcomes. It is the reliability of the mini-implant/skeletal structure couple that is the principal factor in this success. With mini-implants whose heads possess internal threads, orthodontists can attach different types of stable, screwed-in abutments. And with long plates with specifically designed perforations splinting two mini-implants together, orthodontists can further increase the stability of this artificial anchorage. By employing a system with pre-fabricated components orthodontists can quickly create skeletal anchorage adaptable to the mechanics of different techniques.