This prospective pilot study evaluates the effect of restoring symptomatic, carious molar-incisor hypomineralization (MIH)-affected permanent molars using a glass-hybrid restorative material on occlusal force distribution and masticatory muscle activity. Digital occlusal analysis using the T-Scan system and surface electromyography (sEMG) recordings of the masseter and anterior temporalis muscles are performed before treatment and three months after restoration. Hypersensitivity is assessed using the Schiff Cold Air Sensitivity Scale.
This single-arm prospective pilot study investigates whether restorative rehabilitation of MIH-affected permanent molars leads to functional improvements in occlusal balance and neuromuscular activity. Children aged 7-13 years with symptomatic MIH requiring restorative treatment undergo standardized glass-hybrid restorations. Functional occlusal analysis is conducted using the T-Scan Novus system to assess lateral occlusal force distribution, while bilateral surface electromyography (sEMG) evaluates masseter and temporalis muscle activity during maximum voluntary clenching. Dentin hypersensitivity is assessed using the Schiff Cold Air Sensitivity Scale. Pre- and post-treatment outcomes are compared to explore early functional adaptation following MIH rehabilitation.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
5
Selective caries removal followed by bulk-fill glass-hybrid restoration of MIH-affected first permanent molars using Equia Forte®. The procedure is performed by a calibrated pediatric dentist according to the manufacturer's instructions. Occlusion is checked and adjusted after restoration prior to functional assessments.
Marmara University
Istanbul, Maltepe, Turkey (Türkiye)
Lateral Occlusal Force Distribution (LOFD)
Change in lateral occlusal force distribution assessed using the T-Scan digital occlusal analysis system during maximum voluntary clenching. The primary variable is the absolute deviation from ideal 50-50 bilateral force distribution, calculated at baseline and 3 months after glass-hybrid restoration.
Time frame: Baseline and 3 months post-treatment
Masticatory Muscle Activity Symmetry
right-left asymmetry indices of the masseter and anterior temporalis muscles measured using surface electromyography (sEMG) during maximum voluntary clenching.
Time frame: Baseline and 3 months post-treatment
Dentin Hypersensitivity
Dentin hypersensitivity of MIH-affected molars assessed using the Schiff Cold Air Sensitivity Scale following an air-blast stimulus.
Time frame: Baseline and 3 months post-treatment
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