Clinical Evaluation of Discoloration Induced by Root Canal Treatment in Vital and Devital Teeth

This prospective observational study aims to evaluate and compare tooth discoloration following root canal treatment in vital and devital teeth. Patients with maxillary premolar teeth requiring root canal treatment are included in the study. Before treatment, the teeth are classified as vital or devital based on their pulpal status. All teeth receive root canal treatment and coronal restoration using a standardized clinical protocol. Tooth color is objectively measured with a spectrophotometer before treatment and at 3, 6, and 9 months after treatment. Changes in tooth color over time are evaluated and compared between vital and devital teeth.

Inclusion Criteria: * Individuals aged 18 to 65 years. * Systemically healthy individuals. * Patients with maxillary premolar teeth requiring root canal treatment. * Individuals who agree to participate in the study and provide written informed consent. Exclusion Criteria: * Teeth considered non-restorable. * Teeth with full-coverage crown restorations. * Teeth that have previously undergone root canal treatment. * Patients with a history of medication use that may cause tooth discoloration. * Teeth with restorations or caries involving more than two surfaces. * Teeth with restorations, caries, or loss of tooth structure involving the buccal surface. * Teeth with incomplete root development. * Teeth with developmental anomalies. * Teeth with a history of dental trauma. * Teeth with internal or external root resorption. * Teeth with advanced periodontal destruction. * Individuals consuming more than two cups per day of coffee, tea, wine, or fruit juices that may cause tooth discoloration. * Teeth with amalgam restorations. * Current smokers. * Pregnant or breastfeeding women. * Individuals younger than 18 years or older than 65 years.