Victor Dhayanand John, Subramanian Sangeetha, Prakash Psg, Raj Deepika Rachel Samuel
Faculty, Department of Periodontics, SRM Dental College and Hospital, Ramapuram, Tamil Nadu, India.
1Ex-postgraduate Student, Chennai, Tamil Nadu, India.
J Indian Soc Periodontol. 2021 Jan-Feb;25(1):17-21. doi: 10.4103/jisp.jisp_397_20. Epub 2021 Jan 7.
The microbial profile of endodontically treated teeth, presenting with a persisting deep periodontal pocket, secondary to a primary endodontic lesion, draining through the gingival crevice, has received very less attention. This observational study was done to evaluate if these sites with persisting pockets of endodontic origin persist because they have acquired bacteria which are considered as putative periodontal pathogens.
Subgingival plaque samples were collected from fifty patients diagnosed with a primary endodontic and a secondary periodontal lesion that persisted even after completion of the root canal treatment. Clinical parameters such as probing pocket depth, clinical attachment level, plaque index, furcation, and tooth mobility were recorded. Real-time polymerase chain reaction was used to determine the possible association between six bacteria, which are frequently associated with periodontal and endodontic lesions.
The mean cycle threshold value for (Td) was found to be 33.74, and for (Ef), it was 34.39. With regard to clinical attachment loss, Td ( < 0.04) and ( < 0.05) had a significant correlation.
Ef (92%) and Td (86%) were found to be most prevalent. and were in minimal to nonexistent levels.
继发于原发性牙髓病变的经牙髓治疗的牙齿，伴有持续存在的深牙周袋，通过牙龈沟引流，其微生物特征很少受到关注。本观察性研究旨在评估这些源于牙髓的持续存在牙周袋的部位是否因为获得了被认为是假定牙周病原体的细菌而持续存在。
从50例诊断为原发性牙髓病变和继发性牙周病变的患者中收集龈下菌斑样本，这些病变即使在根管治疗完成后仍持续存在。记录临床参数，如探诊牙周袋深度、临床附着水平、菌斑指数、根分叉病变和牙齿松动度。采用实时聚合酶链反应来确定六种经常与牙周和牙髓病变相关的细菌之间的可能关联。
发现（Td）的平均循环阈值为33.74，（Ef）的平均循环阈值为34.39。关于临床附着丧失，Td（<0.04）和（<0.05）具有显著相关性。
发现Ef（92%）和Td（86%）最为普遍。和处于极低至不存在的水平。
