Tooth discoloration caused by endodontic treatment: A cross‐sectional study
Juliana Kutter Bosenbecker, Fabíola Jardim Barbon, Nádia de Souza Ferreira, Renata Dornelles Morgental, Noéli Boscato
Abstract
Abstract Introduction This cross‐sectional study evaluated the influence of endodontic filling material, cervical limit of root filling, and tooth location on the color variation (∆ E 00 ) from 1 to 60 months of follow‐up. Materials and Methods Color records were obtained from 70 participants who received 83 endodontic treatments. CIEL*a*b* color coordinates were measured on the homologous tooth, which was considered as baseline, and on endodontic treated teeth with a spectrophotometer. ∆ E 00 was calculated by the CIEDE2000 method at three conditions (condition 1: homologous tooth vs endodontically treated tooth after ≤1 month; condition 2: homologous tooth vs endodontically treated tooth after >1–12 months; condition 3: homologous tooth vs endodontically treated tooth after >12 months up to 5 years) for each variable. The zinc oxide and eugenol mineral trioxide aggregate or resin‐based filling materials, dental cervix or ≥2 mm in the apical direction cervical limit of root filling and anterior or posterior tooth location were considered in the comparisons. Confidence intervals for the means (95% CI) were calculated, ∆ E 00 values and CIEL*a*b* individual color coordinates were compared for each pair of variables using the Student t test or Welch test ( α = .05). Results Greater ∆ E 00 values were generally observed in the condition 3 for cervical limit (∆ E 00 = 10.7), use of zinc oxide and eugenol and mineral trioxide aggregate‐based filling materials (∆ E 00 = 10.7), and anterior teeth (∆ E 00 = 12.4). Only in the condition 1, the ∆ E 00 values of the filling materials did not show statistical differences ( P = .198). Conclusions Higher ∆ E 00 values were yielded from zinc oxide and eugenol and mineral trioxide aggregate‐based filling materials, anterior teeth, and dental cervix cervical limit of root filling. Clinical significance Tooth discoloration yielded by endodontic materials and procedures is a challenge to clinical practice resulting in aesthetic problems and discomfort to both patient and professional, especially when it occurs in anterior teeth.