Bartols Andreas, Robra Bernt-Peter, Walther Winfried
Dental Academy for Continuing Professional Development Karlsruhe, Karlsruhe, Germany.
Clinic for Conservative Dentistry and Periodontology, Christian-Albrechts-University Kiel, Kiel, Germany.
PeerJ. 2017 Jul 19;5:e3583. doi: 10.7717/peerj.3583. eCollection 2017.
Reciproc instruments are the only contemporary root canal instruments where glide path preparation is no longer strictly demanded by the manufacturer. As the complete preparation of root canals is associated with success in endodontic treatment we wanted to assess the ability and find predictors for Reciproc instruments to reach full working length (RFWL) in root canals of maxillary molars in primary root canal treatment (1°RCTx) and retreatment (2°RCTx) cases.
This retrospective study evaluated 255 endodontic treatment cases of maxillary molars. 180 were 1°RCTx and 75 2°RCTx. All root canals were prepared with Reciproc instruments. The groups were compared and in a binary logistic regression model predictors for RFWL were evaluated.
A total of 926 root canals were treated with Reciproc without glide path preparation. This was possible in 885 canals (95.6%). In 1°RCTx cases 625 of 649 (96.3%) canals were RFWL and in 2°RCTx cases 260 of 277 (93.9%). In second and third mesiobuccal canals (MB2/3) 90 out of 101 (89.1%) were RFWL with Reciproc in 1°RCTx and in the 2°RCTx treatment group 49 out of 51 cases (96.1%). In mesio-buccal (MB1) canals "2°RCTx" was identified as negative predictor for RFWL (OR 0.24 (CI [0.08-0.77])). In MB2/3 canals full working length was reached less often (OR 0.04 (CI [0.01-0.31])) if the tooth was constricted and more often if MB2/3 and MB1 canals were convergent (OR 4.60 (CI [1.07-19.61])).
Using Reciproc instruments, the vast majority of root canals in primary treatment and retreatment cases can be prepared without glide path preparation.
往复式器械是目前唯一一种制造商不再严格要求进行引导通路预备的根管器械。由于根管的完全预备与牙髓治疗的成功相关，我们希望评估往复式器械在乳牙根管治疗（1°RCTx）和再治疗（2°RCTx）病例的上颌磨牙根管中达到工作长度（RFWL）的能力，并找出预测因素。
这项回顾性研究评估了255例上颌磨牙的牙髓治疗病例。其中180例为1°RCTx，75例为2°RCTx。所有根管均使用往复式器械进行预备。对各组进行比较，并在二元逻辑回归模型中评估RFWL的预测因素。
共有926个根管在未进行引导通路预备的情况下使用往复式器械进行了治疗。其中885个根管（95.6%）成功完成。在1°RCTx病例中，649个根管中的625个（96.3%）达到了RFWL，在2°RCTx病例中，277个根管中的260个（93.9%）达到了RFWL。在第一磨牙近中颊根第二和第三根管（MB2/3）中，1°RCTx治疗组101个根管中有90个（89.1%）使用往复式器械达到了RFWL，在2°RCTx治疗组51例中有49例（96.1%）达到了RFWL。在近中颊根（MB1）根管中，“2°RCTx”被确定为RFWL的负性预测因素（比值比[OR]0.
