To evaluate the treatment efficacy, treatment duration, and cephalometric changes, as well as the impact on quality of life, of clear aligners and labiolingual spring Hawley appliances in the treatment of pediatric patients with anterior crossbite.

Two groups were treated with clear aligners and labiolingual springs Hawley and the study consisted of 30 patients, 15 patients in each group. Cast analysis and cephalometric analysis were performed at pretreatment and posttreatment. Quality of life was assessed at the end of treatment for both groups.

Inclusion Criteria:

1. In the mixed dentition phase, aged between 7-12 years
2. With a dental Class I molar relationship according to Angle's classification
3. ANB within the normal range i.e. (the crossbite will be diagnosed as dental)
4. Exhibiting anterior crossbite (AC) in at least one permanent incisor in the sagittal plane
5. No prior orthodontic treatment for any reason
6. No history of maxillofacial trauma
7. No systemic diseases or syndromes that may interfere with treatment
8. Able to attend regular appointments and cooperate with instructions throughout the treatment process

Exclusion Criteria:

1. Patients with functional anterior crossbite associated with mandibular functional shift
2. Patients with clinically evident retrognathia or prognathia of the maxilla or mandible
3. Patients with severe gingivitis or periodontitis
4. Patients with known allergies to the materials to be used in the treatment
5. Patients with severe dental anomalies (e.g., supernumerary teeth, missing teeth, dental malformations)
6. Patients with serious emotional or psychological issues that may hinder treatment compliance

A final decision regarding the sharing of individual participant data (IPD) has not yet been made. Appropriate data-sharing protocols will be evaluated in the future before reaching a decision.