title: Comparison of apical leakage shown by four different dyes with two evaluating methods.
abstract: A study was conducted in vitro to assess and compare the extent of apical leakage of four dyes by two commonly-used evaluation methods. For the study, 120 single-rooted extracted teeth were prepared by the step-back technique and obturated by lateral condensation with gutta-percha and Roth 801 sealer. After randomly allocating the roots into six groups, they were immediately immersed in dye for 72 h, using vacuum for 30 min at 40 degrees C. Teeth were immersed in Eosin, Methylene Blue, Black India Ink and Procion Brilliant Blue and cross-sectioned in 0.7 mm thick slices. Those immersed in Black India Ink and Procion Brilliant Blue were also evaluated by the clearing process. Dye penetration was assessed using a stereomicroscope. A statistically significant greater dye penetration was measured in the cross-sectioned group compared to the clearing group using the same dyes (Black India Ink, P = 0.020, Procion Brilliant Blue, P = 0.040). In the cross-section groups, no statistical significant difference was observed in the amount of leakage comparing the four dyes. No statistically significant difference was found in the leakage pattern of Procion Brilliant Blue and Black India Ink using the clearing technique (P = 0.797). The evaluating method (cross-sections versus clearing) rather than the dye properties was the main difference between results. More research is needed to standardize dye leakage studies.
authors.affiliation: Department of Endodontology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Tamse
authors.forename: A
authors.initials: A
authors.lastname: Katz
authors.forename: F
authors.initials: F
authors.lastname: Kablan
mesh_terms: D002244:Carbon; D004396:Coloring Agents; D003763:Dental Leakage / Q000175:diagnosis*; D018865:Dental Research / Q000379:methods*; D004801:Eosine Yellowish-(YS); D005069:Evaluation Studies as Topic; D006171:Gutta-Percha; D006801:Humans; D008751:Methylene Blue; D011897:Random Allocation; D012387:Root Canal Filling Materials; D018709:Statistics, Nonparametric; D019227:Tooth Apex; D014227:Triazines; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D004396:Coloring Agents; D012387:Root Canal Filling Materials; D014227:Triazines; D015035:Zinc Oxide-Eugenol Cement; C028433:chinese ink; C032467:procion brilliant blue HGR; C074935:Roth's 801 Sealer; D002244:Carbon; D006171:Gutta-Percha; D008751:Methylene Blue; D004801:Eosine Yellowish-(YS)