Overview
This study will be performed to evaluate the treatment of posterior cross-bite with modified hyrax & Quad helix appliances and to compare which one will provide better results in relation to chewing difficulty in children with posterior cross- bite in mixed dentition
Description
This study will be performed to evaluate the treatment of posterior cross-bite with modified hyrax & Quad helix appliances and to compare which one will provide better results in relation to chewing difficulty as a primary outcome of this study and also evaluate the increase in the inter maxillary width , sleep apnea and signs & symptoms of tempro-mandibular joints disorder in children with posterior cross- bite in mixed dentition Cases will be examined within a regular interval up to one year
Eligibility
Inclusion Criteria:
- Children with posterior cross-bite in mixed dentition stage.
- Children with normal and mild growth pattern.
- Children with completely erupted upper first molars.
Exclusion Criteria:
- Children with advanced periodontal diseases.
- Children having general diseases, syndromes.
- Children with previous orthodontic.
- Children with severe horizontal growth patterns.