for two weeks were given, which reduced the number of malocclusion (Grade 2) to only one patient at 12 weeks.
In 1977, seeking early treatment of Class III malocclusions, Falconi et al (12) suggested the use of two--maxillary and mandibular--acetate plates with complete occlusal coverage and vestibular hooks joining the plates together by means of Class III intermaxillary elastics.
A quasi-experimental prospective clinical study was performed, making interventions with bimaxillary acetate plates (which worked as anchorage for intermaxillary elastics with a Class III vector) in a sample of 26 individuals of both sexes, between 3 and 9 years of age, who were selected for convenience of the Dentistry Care Center of the Dentistry Department at Universidad de Antioquia following these inclusion criteria: between 3 and 9 years of age with skeletal mesiorelation cephalometrically confirmed, anterior crossbite or edge-to-edge bite, with or without posterior crossbite (uni- or bilateral).
Once the plates had been installed, the patients and their parents were given directions on how to use intermaxillary elastics with a Class III vector, from the hook located in the molar region of the upper plate up to the hook located in the canine zone of the lower plate.
Pendulum does not require intermaxillary elastics
for anchorage support, as required in the Wilson distalizing system.
Use intermaxillary elastics
until the upper posterior teeth are in anterior position balance with the lowers.
Usually conventional mechanism for orthodontic anchorage control can be either extraoral or intraoral that is headgear or intermaxillary elastics.
Traditional biomechanical techniques, such as the use of extraoral anchorage by headgear or intraoral, one by bars, palatal/lingual arches or intermaxillary elastics, cannot effectively control anchorage, either due to lack of patient compliance or due to inaccuracies in the support structures.