Evaluation of Modified Hyrax Versus Quad Helix in Treatment of Posterior Cross Bite
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
- EligibilityCriteria: 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. - HealthyVolunteers: No - Gender: All - MinimumAge: 6 Years - MaximumAge: 18 Years - StdAgeList: Child, Adult