The aim of this split-mouth clinical study is to compare the effectiveness of D Blue diode laser application and ProSylc bioactive glass powder application in reducing dentin hypersensitivity in patients with non-carious cervical lesions (NCCLs). Different treatment modalities will be applied within the same participant, and changes in dentin hypersensitivity will be evaluated following treatment. The primary outcome measure will be the reduction in dentin hypersensitivity after the interventions. The findings of this study are expected to contribute to the identification of effective non-invasive treatment approaches for the management of dentin hypersensitivity associated with non-carious cervical lesions.