Oncu Aysenur, Ozdemir Merve
Faculty of Dentistry, Department of Endodontics, Ankara University, Yenimahalle, Ankara, Turkey.
Faculty of Dentistry, Department of Pediatric Dentistry, Lokman Hekim University, Ankara, Turkey.
BMC Oral Health. 2025 May 24;25(1):784. doi: 10.1186/s12903-025-06186-w.
The aim of this study was to evaluate the effects of different repair materials and blood contamination on the color stability of teeth following external cervical root resorption (ECRR) repair.
This study included 60 extracted maxillary central incisors. The endodontic access cavity and root canal preparation were performed. The ECRR cavities were created in all samples. The localization of ECRR cavities was in the coronal and buccal part of the root surface. The sample color was assessed using a spectrophotometer by a single operator from a distance of 2 mm above the cementoenamel junction for initial measurement (T0). Then, the master cone was placed in the root canal, and samples were repaired as follows: Group 1:composite resin, Group 2:Biodentine, Group 3:resin-modified glass ionomer cement, Group 4:with blood contamination composite resin, Group 5:with blood contamination Biodentine, and Group 6: with blood contamination resin-modified glass ionomer cement. Measurements were made at 7 days (T7), 30 days (T30), 90 days (T90), and 180 days (T180) after the initial measurement (T0) at the indicated area on the mid-buccal surface of the tooth.
Blood contamination significantly affected the ΔE value, causing discoloration at all time intervals. The composite resin and RMGIC without blood contamination did not exhibit clinically observable discoloration (ΔE < 3.7) at T7, T30, and T90 time intervals; however, they showed discoloration (ΔE ≥ 3.7) at T180. While Biodentine without blood contamination did not show discoloration at T7 or T30 (ΔE ≥ 3.7), it showed discoloration at T90 and T180 (ΔE < 3.7). The composite resin and Biodentine with blood contamination showed clinically observable discoloration (ΔE ≥ 3.7) at all time intervals. While RMGIC with blood contamination showed clinically observable discoloration at T30, T90, and T180 intervals, it did not show discoloration at T7.
This study reported that blood contamination of the ECRR cavity during repair resulted in tooth discoloration. Biodentine had the potential to cause more visible color change.
本研究的目的是评估不同修复材料和血液污染对外侧颈牙根吸收（ECRR）修复后牙齿颜色稳定性的影响。
本研究纳入60颗拔除的上颌中切牙。进行开髓和根管预备。在所有样本中制备ECRR洞。ECRR洞位于牙根表面的冠部和颊侧部分。由一名操作人员使用分光光度计在牙骨质釉质界上方2mm处对样本颜色进行初始测量（T0）。然后，将主尖锉放入根管中，样本按以下方式修复：第1组：复合树脂，第2组：生物活性玻璃陶瓷，第3组：树脂改性玻璃离子水门汀，第4组：有血液污染的复合树脂，第5组：有血液污染的生物活性玻璃陶瓷，第6组：有血液污染的树脂改性玻璃离子水门汀。在初始测量（T0）后的7天（T7）、30天（T30）、90天（T90）和180天（T180），在牙齿颊面中部的指定区域进行测量。
血液污染显著影响ΔE值，在所有时间间隔均导致牙齿变色。无血液污染的复合树脂和树脂改性玻璃离子水门汀在T7、T30和T90时间间隔未出现临床可观察到的变色（ΔE < 3.7）；然而，它们在T180时出现变色（ΔE≥ 3.7）。无血液污染的生物活性玻璃陶瓷在T7或T30时未出现变色（ΔE≥ 3.7），但在T90和T180时出现变色（ΔE < 3.7）。有血液污染的复合树脂和生物活性玻璃陶瓷在所有时间间隔均出现临床可观察到的变色（ΔE≥ 3.7）。有血液污染的树脂改性玻璃离子水门汀在T30、T90和T180时间间隔出现临床可观察到的变色，但在T7时未出现变色。
本研究报告称，修复过程中ECRR洞的血液污染导致牙齿变色。生物活性玻璃陶瓷有可能导致更明显的颜色变化。
