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

Condition(s) studied

Investigational drug(s) / intervention(s)

Root Canal Treatment: Root canal treatment is performed in a single visit by the same operator using a standardized clinical protocol. Following local anesthesia and rubber dam isolation, an access cavity is prepared and the working length is determined using an electronic apex locator and confirmed with periapical radiography. Root canals are prepared using a nickel-titanium rotary instrumentation system. Sodium hypochlorite (NaOCl) is used during instrumentation, followed by a final irrigation protocol with 17% ethylenediaminetetraacetic acid (EDTA) and 2.5% NaOCl with irrigant activation. The canals are subsequently dried with sterile paper points. Root canal obturation is performed in the same visit using gutta-percha and AH Plus root canal sealer with the cold lateral condensation technique. After obturation, excess gutta-percha is removed and the coronal level of the root canal filling is standardized at approximately 2 mm apical to the cementoenamel junction. Residual root canal sealer is removed fr

Study summary

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.

Eligibility

Primary outcome measure(s)

• Change in Tooth Color (ΔE00) — Baseline, 3 months, 6 months, and 9 months
  Tooth color is objectively assessed using a VITA Easyshade V spectrophotometer. CIELAB L\*, a\*, and b\* values are recorded from the middle third of the buccal surface of each tooth. Three consecutive measurements are obtained at each assessment, and the mean values are used for analysis. Overall tooth color change between baseline and each follow-up time point is calculated using the CIEDE2000 color difference formula (ΔE00). Higher ΔE00 values indicate a greater magnitude of color difference. Changes in ΔE00 are compared between vital and devital teeth.

Trial sites (1)

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