PDF(Pubmed)
Abstract：
UNASSIGNED: Present research was done to assess stress distribution in three different taper design preparation of root canal with the help of finite element analysis.
UNASSIGNED: Lower incisors teeth having single canals that were cleaned and shaped with the help of NeoEndo Flex Titanium (NiTi) rotary file and later three designs were created such as 4%, 6%, and 8% canal preparation taper. Cone beam computed tomography (CBCT) was done for all teeth and subjected to finite element analysis for stresses. The collected data were statistically analyzed.
UNASSIGNED: Highest stress was found in the coronal followed by the middle and least in the apical part in all three designs. The highest stress value was found in enamel than dentin (MPa). The highest stress value was found with design 3 (8% taper) followed by designs 2 (6% taper) and 1 (4% taper) for enamel and dentin with either oblique or vertical stress loading.
UNASSIGNED: All canals preparation exhibited maximum enamel stress at the coronal load points compared to apical and middle portions. The stress increases with increase in canal tapering.
UNASSIGNED: Lower incisors teeth having single canals that were cleaned and shaped with the help of NeoEndo Flex Titanium (NiTi) rotary file and later three designs were created such as 4%, 6%, and 8% canal preparation taper. Cone beam computed tomography (CBCT) was done for all teeth and subjected to finite element analysis for stresses. The collected data were statistically analyzed.
UNASSIGNED: Highest stress was found in the coronal followed by the middle and least in the apical part in all three designs. The highest stress value was found in enamel than dentin (MPa). The highest stress value was found with design 3 (8% taper) followed by designs 2 (6% taper) and 1 (4% taper) for enamel and dentin with either oblique or vertical stress loading.
UNASSIGNED: All canals preparation exhibited maximum enamel stress at the coronal load points compared to apical and middle portions. The stress increases with increase in canal tapering.
摘要：
■本研究是在有限元分析的帮助下评估三种不同的根管锥度设计准备中的应力分布。
■下门牙具有单管，在NeoEndoFlexTitanium（NiTi）旋转文件的帮助下进行了清洁和整形，后来创建了三种设计，例如4％，6%,和8%的运河准备锥度。对所有牙齿进行锥形束计算机断层扫描（CBCT），并对应力进行有限元分析。对收集的数据进行统计分析。
■在所有三种设计中，在冠状部位发现应力最高，其次是中部，而在根尖部位发现应力最小。牙釉质中的应力值高于牙本质（MPa）。对于具有倾斜或垂直应力载荷的牙釉质和牙本质，设计3（8％锥度）和设计2（6％锥度）和1（4％锥度）发现了最高的应力值。
■与顶端和中间部分相比，所有运河准备在冠状负荷点处表现出最大的釉质应力。应力随着运河渐缩的增加而增加。
■下门牙具有单管，在NeoEndoFlexTitanium（NiTi）旋转文件的帮助下进行了清洁和整形，后来创建了三种设计，例如4％，6%,和8%的运河准备锥度。对所有牙齿进行锥形束计算机断层扫描（CBCT），并对应力进行有限元分析。对收集的数据进行统计分析。
■在所有三种设计中，在冠状部位发现应力最高，其次是中部，而在根尖部位发现应力最小。牙釉质中的应力值高于牙本质（MPa）。对于具有倾斜或垂直应力载荷的牙釉质和牙本质，设计3（8％锥度）和设计2（6％锥度）和1（4％锥度）发现了最高的应力值。
■与顶端和中间部分相比，所有运河准备在冠状负荷点处表现出最大的釉质应力。应力随着运河渐缩的增加而增加。
