Esthetic Class II treatment with the Beneslider and aligners.

treatment method for dental Class II pa ­ tients with excessive overjet, anterior crowding, or both. Given the unpopularity of headgear among pa tients,1,2 clinicians increasingly prefer intraoral appliances with minimal need for patient coop­ eration. Unfortunately, most of the conventional non­compliance devices produce unwanted side effects. Anchorage loss of 24­55% can result in mesial migration and protrusion of the anterior dentition.3­5 An acrylic palatal button reduces the effects of reciprocal forces, but this soft­tissue­borne appliance is not always completely stable, and it impairs oral hygiene in the palatal area. In recent years, temporary anchorage devices (TADs) have been integrated into distalization appliances to prevent anchorage loss.6­15 Mini­implants are par­ ticularly attractive because of their minimal inva­ siveness and low cost.16­20 Various insertion sites for distalization mechanics using TADs have been recommended. The retromolar region proved unsuitable for mini­ implant insertion due to its poor bone quality and thick soft tissue.21 The alveolar process also seems inappropriate, since TADs may impede distal tooth movement when the premolars are pulled along with the molars by interdental fibers. Mini­ implants placed in the alveolar process also fail at a much higher rate compared to the anterior palate, which offers good bone quality, a thin attached mucosa, and no risk of dental injury from tooth contact.22