Randomized clinical trial , with a sample of 60 children with atypical swallowing, class II and with SN1 orthopedic appliances these patients were randomly divided into, group 1: 30 patients with SN1 orthopedic appliances and myofunctional therapy and group 2: 30 patients with SN1 orthopedic appliances and without myofunctional therapy.

Randomized clinical trial with two parallel arms, on a sample of 60 children with atypical swallowing, class II and with SN1 orthopedic appliances, these patients were randomly divided into, group 1: 30 patients with SN1 orthopedic appliances and myofunctional therapy and group 2: 30 patients with SN1 orthopedic appliances and without myofunctional therapy for the study. Both groups carried out the evaluation of the protocol that included: 1) evaluation of the dental occlusion class and skeletal classification 2) swallowing function test using the Payne technique; 3) Mioscaner analysis to measure perioral forces, i.e. tongue extension force, lip pressure, masseter contraction force.

Inclusion Criteria:

• the inclusion criteria the participants will be between

  • 8 and 10 years old
  • mixed dentition
  • canine class II diagnosis and 2 to 4 mm
  • molar according to Angle and overjet between 4 to 6 mm

Exclusion Criteria:

• Patients with systemic involvement

  • congenital malformations
  • facial deformities
  • Open bite
  • oral breathing
  • finger sucking habit will be excluded

The operator responsible for making measurements of tongue position, mandibular advancement, orofacial muscle contraction, chin muscle activity, will be blinded to the assignment. A previous training will be carried out with an instruction manual for the clinical evaluation process