Investigation of Skeletally Anchored Expansion of the Maxilla

This study aims to compare two different methods for maxillary expansion in adult patients with transverse maxillary deficiency. Participants will receive either miniscrew-assisted rapid palatal expansion (MARPE-MICRO-4). We want to compare the surgically assisted rapid palatal expansion (SARPE) and the non surgical/conservative method. Clinical (3D scans of the upper jaws) measurements will be used to evaluate skeletal expansion and stability over time. Approximately 90 adult patients will be included and followed for 12 months. The results of this study may help clinicians choose the most appropriate treatment method for adult maxillary expansion.

Inclusion Criteria: * Presence of transverse maxillary deficiency requiring maxillary expansion * Indication for either non-surgical (MARPE) or surgically assisted (SARPE) maxillary expansion * Permanent dentition * Ability to understand the study procedures and provide informed consent Exclusion Criteria: * Previous maxillary expansion treatment * Craniofacial syndromes or cleft lip/palate * Severe periodontal disease * Active oral infection * Systemic conditions affecting bone metabolism * Pregnancy or breastfeeding * Inability to comply with study procedures or follow-up visits