不同冲洗液体对机用镍钛锉根管预备能力的影响
发布时间：2019-01-18 18:17
【摘要】：背景:近年来,根管的预备器械有了很大发展,不同材料和设计构造的预备器械不断涌现,最有代表性的是镍钛根管器械。其具有大锥度,超弹性,耐磨性,极佳的柔韧性和超强的记忆性能等优点,不仅在弯曲根管预备中可减少偏移和台阶的形成,而且可明显提高根管预备的效率,更易预备出有利于根管冲洗和充填的形态。但是,镍钛器械也有其无法避免的缺陷,如相比传统的手动不锈钢器械,镍钛器械更容易发生折断。目的:本实验通过研究不同液体冲洗时镍钛器械的预备根管数目和根管预备效率,探寻最有利于提高其根管预备能力的冲洗方式。方法:实验用机用镍钛锉PeoTaper Universal(PTU)F1共80根,按照冲洗液不同随机分为四组,每组20根,分别为蒸馏水组、生理盐水组、1%次氯酸钠组和5%次氯酸钠组。在模拟弯曲根管的树脂模块上以逐步深入法进行根管预备,预备过程中用冲牙器以不同液体持续冲洗镍钛锉针,记录预备每支锉预备根管数、提拉总次数、每个根管预备完成所需的提拉次数,比较各组间的差异。结果:四种不同冲洗条件得出F1锉折断时预备的根管数(x±s)分别为:蒸馏水组(7.13±3.48)个;生理盐水组(6.24±1.76)个;1%次氯酸钠组(6.88±3.20)个;5%次氯酸钠组(4.31±2.34)个。统计结果显:5%次氯酸钠组与其他组均有统计学差异(P0.05),其余三组间没有统计学差异;四组预备根管数目比较:蒸馏水组≈生理盐水组≈1 %次氯酸钠组5%次氯酸钠组。四种不同冲洗条件得出F1锉折断时预备单个根管的平均提拉次数(x±s)分别为:蒸馏水组(17.98±1.70)次;生理盐水组(17.85±0.73)次;1%次氯酸钠组(17.47±1.10)次;5%次氯酸钠组(18.31±1.44)次。通过方差分析得各组间均没有统计学差异(P0.05)。结论:四种不同液体冲洗条件下,水、生理盐水、1%次氯酸钠比5%次氯酸钠更有利于增加机用镍钛锉的使用次数,但在预备效率方面结果相似。综合考虑经济、环保等因素,水是最有利于提高镍钛锉根管预备能力的冲洗液体。
[Abstract]:Background: in recent years, there has been great development in root canal preparation instruments, and various materials and designs have been emerging, the most representative of which is nickel-titanium root canal instruments. It has the advantages of large taper, super elasticity, wear resistance, excellent flexibility and super memory performance. It can not only reduce deviation and step formation in curved root canal preparation, but also improve the efficiency of root canal preparation. It is easier to prepare for the shape of root canal flushing and filling. However, nickel-titanium instruments also have inevitable defects, such as traditional manual stainless steel instruments, nickel-titanium instruments are more likely to break. Objective: to study the number of root canal preparation and root canal preparation efficiency of nickel titanium instruments under different liquid washing conditions, and to find out the most effective way to improve the root canal preparation ability. Methods: 80 PeoTaper Universal (PTU) F1 files were randomly divided into four groups: distilled water group, normal saline group, 1% sodium hypochlorite group and 5% sodium hypochlorite group. In the resin module of simulating curved root canal, the root canal preparation was carried out step by step. During the preparation process, the nickel-titanium file needle was continuously washed with different liquid in the preparation process, and the number of prepared root canals and the total number of times of drawing were recorded. Each root canal was prepared to complete the number of times to pull, compare the differences between the groups. Results: the number of root canals (x 卤s) prepared when F1 files were broken was (7.13 卤3.48) in distilled water group, (6.24 卤1.76) in saline group, (6.88 卤3.20) in 1% sodium hypochlorite group. 5% sodium hypochlorite group (4.31 卤2.34). The statistical results showed that there was statistical difference between 5% sodium hypochlorite group and other groups (P0.05), but there was no statistical difference among the other three groups. Comparison of the number of prepared root canals in four groups: distilled water group 鈮，
本文编号：2410977
[Abstract]:Background: in recent years, there has been great development in root canal preparation instruments, and various materials and designs have been emerging, the most representative of which is nickel-titanium root canal instruments. It has the advantages of large taper, super elasticity, wear resistance, excellent flexibility and super memory performance. It can not only reduce deviation and step formation in curved root canal preparation, but also improve the efficiency of root canal preparation. It is easier to prepare for the shape of root canal flushing and filling. However, nickel-titanium instruments also have inevitable defects, such as traditional manual stainless steel instruments, nickel-titanium instruments are more likely to break. Objective: to study the number of root canal preparation and root canal preparation efficiency of nickel titanium instruments under different liquid washing conditions, and to find out the most effective way to improve the root canal preparation ability. Methods: 80 PeoTaper Universal (PTU) F1 files were randomly divided into four groups: distilled water group, normal saline group, 1% sodium hypochlorite group and 5% sodium hypochlorite group. In the resin module of simulating curved root canal, the root canal preparation was carried out step by step. During the preparation process, the nickel-titanium file needle was continuously washed with different liquid in the preparation process, and the number of prepared root canals and the total number of times of drawing were recorded. Each root canal was prepared to complete the number of times to pull, compare the differences between the groups. Results: the number of root canals (x 卤s) prepared when F1 files were broken was (7.13 卤3.48) in distilled water group, (6.24 卤1.76) in saline group, (6.88 卤3.20) in 1% sodium hypochlorite group. 5% sodium hypochlorite group (4.31 卤2.34). The statistical results showed that there was statistical difference between 5% sodium hypochlorite group and other groups (P0.05), but there was no statistical difference among the other three groups. Comparison of the number of prepared root canals in four groups: distilled water group 鈮，
本文编号：2410977
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