Nabavizadeh Mohammadreza, Shokouhi Mohammad Mehdi, Kheirandish Mojgan, Sahebi Safoora, Sadatshojaee Nooshin, Abbaszadegan Abbas
Oral and Dental Disease Research Center, Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Dent (Shiraz). 2021 Sep;22(3):193-197. doi: 10.30476/DENTJODS.2020.84776.1100.
The extrusion of intracanal debris is one of the challenging problems related to almost all root canal preparation systems, which may cause flare-ups and impairment in the healing process.
This study was conducted to evaluate the amount of apically-extruded debris during root canal preparation using Medin (MEDIN Co., Czech Republic) rotary system compared with two common rotary systems, including ProTaper (Dentsply Maillefer., Switzerland) and RaCe (FKG Dentaire, Switzerland).
In this study, Sixty mandibular premolars with single canal were randomly assigned to three groups (n=20). The root canals were prepared with Medin, ProTaper, and RaCe rotary instruments based on their manufacturers' instructions. The debris were collected into pre-weighted Eppendorf tubes. The weight of the extruded debris was calculated by subtracting the pretreatment weight of the vials. Data were analyzed using the Kruskal-Wallis test at a 5% significance level.
Medin instrument caused significantly less debris extrusion in comparison with ProTaper and RaCe (< 0.05). The differences between the ProTaper and RaCe rotary systems were not statistically significant (= 0.752).
Within the limitations of this study, Medin rotary system produced less apical extrusion than ProTaper and RaCe.
根管内碎屑的挤出是几乎所有根管预备系统都面临的具有挑战性的问题之一，这可能会导致炎症发作并损害愈合过程。
本研究旨在评估使用Medin（捷克共和国MEDIN公司）旋转系统进行根管预备时根尖挤出碎屑的量，并与两种常见的旋转系统ProTaper（瑞士登士柏迈耶公司）和RaCe（瑞士FKG牙科）进行比较。
在本研究中，将60颗单根管下颌前磨牙随机分为三组（n = 20）。根据制造商的说明，使用Medin、ProTaper和RaCe旋转器械对根管进行预备。将碎屑收集到预先称重的Eppendorf管中。通过减去小瓶的预处理重量来计算挤出碎屑的重量。使用Kruskal-Wallis检验在5%的显著性水平上分析数据。
与ProTaper和RaCe相比，Medin器械导致的碎屑挤出明显更少（<0.05）。ProTaper和RaCe旋转系统之间的差异无统计学意义（= 0.752）。
在本研究的局限性内，Medin旋转系统产生的根尖挤出比ProTaper和RaCe少。
