Zare Sahar, Shen Ivy, Zhu Qiang, Ahn Chul, Primus Carolyn, Komabayashi Takashi
University of New England College of Dental Medicine, Portland, ME, USA.
Division of Endodontology, University of Connecticut School of Dental Medicine, Farmington, CT, USA.
Restor Dent Endod. 2021 Apr 16;46(2):e25. doi: 10.5395/rde.2021.46.e25. eCollection 2021 May.
This study used micro-computed tomography (µCT) to compare voids and interfaces in single-cone obturation among AH Plus, EndoSequence BC, and prototype surface pre-reacted glass ionomer (S-PRG) sealers and to determine the percentage of sealer contact at the dentin and gutta-percha (GP) interfaces.
Fifteen single-rooted human teeth were shaped using ProTaper NEXT size X5 rotary files using 2.5% NaOCl irrigation. Roots were obturated with a single-cone ProTaper NEXT GP point X5 with AH Plus, EndoSequence BC, or prototype S-PRG sealer ( = 5/group).
The volumes of GP, sealer, and voids were measured in the region of 0-2, 2-4, 4-6, and 6-8 mm from the apex, using image analysis of sagittal µCT scans. GP volume percentages were: AH Plus (75.5%), EndoSequence BC (87.3%), and prototype S-PRG (94.4%). Sealer volume percentages were less: AH Plus (14.3%), EndoSequence BC (6.8%), and prototype S-PRG (4.6%). Void percentages were AH Plus (10.1%), EndoSequence BC (5.9%), and prototype S-PRG (1.0%). Dentin-sealer contact ratios of AH Plus, EndoSequence BC, and prototype S-PRG groups were 82.4% ± 6.8%, 71.6% ± 25.3%, and 70.2% ± 9.4%, respectively. GP-sealer contact ratios of AH Plus, EndoSequence BC, and prototype S-PRG groups were 65.6% ± 29.1%, 80.7% ± 25.8%, and 87.0% ± 8.6%, respectively.
Prototype S-PRG sealer created a low-void obturation, similar to EndoSequence BC sealer with similar dentin-sealer contact (> 70%) and GP-sealer contact (> 80%). Prototype S-PRG sealer presented comparable filling quality to EndoSequence BC sealer.
本研究使用微型计算机断层扫描（µCT）比较AH Plus、EndoSequence BC和原型表面预反应玻璃离子（S-PRG）封闭剂在单锥充填中的空隙和界面，并确定封闭剂在牙本质和牙胶（GP）界面处的接触百分比。
使用ProTaper NEXT X5旋转锉对15颗单根人牙进行预备，并用2.5%次氯酸钠冲洗。用单锥ProTaper NEXT GP尖X5分别与AH Plus、EndoSequence BC或原型S-PRG封闭剂对牙根进行充填（每组n = 5）。
使用矢状面µCT扫描的图像分析，在根尖0-2、2-4、4-6和6-8 mm区域测量GP、封闭剂和空隙的体积。GP体积百分比分别为：AH Plus（75.5%）、EndoSequence BC（87.3%）和原型S-PRG（94.4%）。封闭剂体积百分比更低：AH Plus（14.3%）、EndoSequence BC（6.8%）和原型S-PRG（4.6%）。空隙百分比分别为AH Plus（10.1%）、EndoSequence BC（5.9%）和原型S-PRG（1.0%）。AH Plus、EndoSequence BC和原型S-PRG组的牙本质-封闭剂接触率分别为82.4%±6.8%、71.6%±25.3%和70.2%±9.4%。AH Plus、EndoSequence BC和原型S-PRG组的GP-封闭剂接触率分别为65.6%±29.1%、80.7%±25.8%和87.0%±8.6%。
原型S-PRG封闭剂形成了低空隙充填，类似于EndoSequence BC封闭剂，具有相似的牙本质-封闭剂接触（>70%）和GP-封闭剂接触（>80%）。原型S-PRG封闭剂的充填质量与EndoSequence BC封闭剂相当。
