Efficacy of the Sander bite‐jumping appliance in growing patients with mandibular retrusion: a randomized controlled trial

Abstract

The BJA can effectively correct class II malocclusions by a combination of dentoalveolar and skeletal effects. The long-term stability of the correction needs to be evaluated.

A prospective controlled evaluation of Class II division 1 malocclusions treated with fixed lingual mandibular growth modificator

“…2,4,29 In the present trial, in agreement with the results of the Martina et al 15 trial using the BJA, it is interesting to note that no significant modifications in the inclinations of the maxillary and mandibular lines were seen, thus avoiding the undesirable tendency toward clockwise mandibular rotation during treatment. However, the initial divergence of the jaws should be taken into account in any future studies using FLMGM.…”

“…7,8,13,14 Moreover, there was an increase in mandibular length, and this increase was associated with significant chin advancement. These outcomes are in agreement with the findings of previous clinical studies using the MARA, 6 FMA, 5 BJA, 15 and twin-block appliance, 4 but they contradict the findings of studies by Lund and Sandler 25 and McNamara et al 26 in which functional treatment led to an increase in the mandible length with no significant chin advancement. In principle, the clinical significance of a recorded increase in mandibular length needs to be considered in terms of forward chin positioning and must be assessed in relation to changes in the gonial angle.…”

“…It is proven that palatal cribs eliminate the tongue/incisors contact, improve lip posture, and subsequently produce significant lingual incisor inclination. 30 The double-plate system, 7,15 and most functional appliances 2,25 in general, frequently cause upper incisor retroclination and lower incisor proclination, which are usually considered unfavorable effects and should be limited, as they reduce the potential for orthopedic change. 31 The FLMGM appeared to be advantageous in terms of lower incisor retroclination, and this is somehow in accordance with the results of Cura et al, 29 who found the Bass appliance to have little effect on the lower incisors, and Sander and Lassak, 7 who observed a minimal/clinically insignificant increase of the labial inclination of lower incisors as a result of the double-plate appliance.…”

“…[7][8][9][10] The original design and all its modifications, however, incorporate an inclined plane in the mandible and guide bars in the maxilla as the mechanism of action. 11 Numerous studies 3,7,8,[12][13][14][15] have verified the effectiveness of the double-plate system in treating Class II/ 1 malocclusions. A recent randomized, controlled trial carried out by Martina et al 15 concluded that BJA effectively corrects Class II malocclusions and produces a significant increase in mandibular length, reduction in dental overjet, and improvement in molar relationship.…”

“…11 Numerous studies 3,7,8,[12][13][14][15] have verified the effectiveness of the double-plate system in treating Class II/ 1 malocclusions. A recent randomized, controlled trial carried out by Martina et al 15 concluded that BJA effectively corrects Class II malocclusions and produces a significant increase in mandibular length, reduction in dental overjet, and improvement in molar relationship. This effectiveness prompted the author to develop a fixed double-plate system for the correction of skeletal Class II malocclusions in growing patients, termed fixed lingual mandibular growth modificator (FLMGM).…”