Impact of Glass-Hybrid Restoration on Occlusal Force Distribution and Masticatory Muscle Activity in Children With Molar-Incisor Hypomineralization

Inclusion Criteria: * Children aged 7 to 13 years * Diagnosis of molar-incisor hypomineralization (MIH) according to the criteria of Ghanim et al. * Presence of at least two MIH-affected first permanent molars with post-eruptive enamel breakdown requiring restorative treatment * Presence of dentin hypersensitivity in the affected molars * Ability to comply with T-Scan and surface electromyography (sEMG) recording procedures * Written informed consent obtained from parents or legal guardians, and assent from the child * Exclusion Criteria: * Previous or ongoing orthodontic treatment * Presence of craniofacial anomalies or syndromes * Diagnosis of temporomandibular disorders * Parafunctional habits (e.g., bruxism) * Clinically evident facial asymmetry * Malocclusions such as crossbite or open bite * Systemic diseases or medications affecting neuromuscular function -Inability to cooperate with functional assessment procedures -