Rouhani Armita, Erfanzadeh Mahbobe, Jafarzadeh Hamid, Najafi Elham
Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Private Practice, Mashhad, Iran.
Iran Endod J. 2018 Winter;13(1):25-29. doi: 10.22037/iej.v13i1.15807.
Endodontic therapy is challenging in open apex teeth. One of these problems is the residue of medicaments on root canal walls. The aim of this study was to evaluate the amount of residual materials on canal walls after the use as medicaments within natural open apex teeth.
A total of 45 human extracted single-rooted premolars with open apices were selected. After cutting off the crowns, root canals were gently instrumented using #40 files and irrigated with 0.5% sodium hypochlorite. The samples were randomly divided into three groups: calcium hydroxide (CH), triple antibiotic paste (TAP) and propolis (PP). In these groups, CH, TAP, or PP were placed into the canals, respectively. The samples were then restored with temporary fillings. After one week, instrumentation was again performed as mentioned above. The samples were longitudinally cut and scanned and the remaining material in both halves was evaluated using computer software. One-way ANOVA was used to compare the average paste level remaining on the canal walls.
The residual amount of CH on the canal walls was significantly higher than that of PP (=0.001). The residual amount of CH was higher than TAP but this difference was not significant (=0.144); the residual amount of TAP was higher than PP but this difference was not significant, either (=0.094).
PP is superior to CH and TAP in terms of removability from the root canal system within open apex teeth.
根尖开放的牙齿进行根管治疗具有挑战性。其中一个问题是根管壁上药物的残留。本研究的目的是评估在天然根尖开放的牙齿中用作药物后根管壁上残留材料的量。
共选取45颗人拔除的根尖开放的单根前磨牙。截去牙冠后，用#40锉轻柔地预备根管，并用0.5%的次氯酸钠冲洗。样本随机分为三组：氢氧化钙（CH）、三联抗生素糊剂（TAP）和蜂胶（PP）。在这些组中，分别将CH、TAP或PP放入根管内。然后用临时充填材料进行充填修复。一周后，再次按上述方法进行根管预备。将样本纵向切开并扫描，使用计算机软件评估两半中剩余的材料。采用单因素方差分析比较根管壁上剩余糊剂的平均水平。
根管壁上CH的残留量显著高于PP（P = 0.001）。CH的残留量高于TAP，但差异不显著（P = 0.144）；TAP的残留量高于PP，但差异也不显著（P = 0.094）。
在根尖开放的牙齿中，就从根管系统中的可去除性而言，PP优于CH和TAP。
