Abstract：
UNASSIGNED: : The aim of this study was to measure the amount of material extruded in the periapical area using three irrigation needles (Max-I-Probe, NaviTip Fx and IrriFlex flexible needle).
UNASSIGNED: : Mandibular premolars were selected for this study and glass vials were used to gather the extruded debris and they were preweighed. The samples were divided into two groups: Group A (1 mm penetration of needle from working length), which was subdivided into three subgroups: Subgroup A1: Irrigation was made by Max-I-Probe. Subgroup A2: Irrigation was made by NaviTip Fx. Subgroup A3: Irrigation was made by IrriFlex flexible needle. Group B (3 mm penetration of needle), which was subdivided into three subgroups: Subgroup B1: Irrigation was made by Max-I-Probe. Subgroup B2: Irrigation was made by NaviTip Fx. Subgroup B3: Irrigation was made by IrriFlex flexible needle. XP-endo Shaper was used for chemomechanical preparation. After removal from vials, the teeth were incubated and then removed from the incubator and weighed again three times. The average of the readings was taken. Analysis of variance (ANOVA) and least significance difference tests were applied to analyse data.
UNASSIGNED: : All of the needles caused debris extrusion. There was a significant difference between groups (P ≤ 0.001) according to the depth of penetration. The lowest value for debris was observed in subgroup B3 while subgroup A2 had shown the highest mean.
UNASSIGNED: Results revealed that the design and depth of needles significantly affected the debris extrusion. Using more flexible needles and shorter penetration depth for irrigation so that we don\'t need to push the needles so far apically.
UNASSIGNED: : Mandibular premolars were selected for this study and glass vials were used to gather the extruded debris and they were preweighed. The samples were divided into two groups: Group A (1 mm penetration of needle from working length), which was subdivided into three subgroups: Subgroup A1: Irrigation was made by Max-I-Probe. Subgroup A2: Irrigation was made by NaviTip Fx. Subgroup A3: Irrigation was made by IrriFlex flexible needle. Group B (3 mm penetration of needle), which was subdivided into three subgroups: Subgroup B1: Irrigation was made by Max-I-Probe. Subgroup B2: Irrigation was made by NaviTip Fx. Subgroup B3: Irrigation was made by IrriFlex flexible needle. XP-endo Shaper was used for chemomechanical preparation. After removal from vials, the teeth were incubated and then removed from the incubator and weighed again three times. The average of the readings was taken. Analysis of variance (ANOVA) and least significance difference tests were applied to analyse data.
UNASSIGNED: : All of the needles caused debris extrusion. There was a significant difference between groups (P ≤ 0.001) according to the depth of penetration. The lowest value for debris was observed in subgroup B3 while subgroup A2 had shown the highest mean.
UNASSIGNED: Results revealed that the design and depth of needles significantly affected the debris extrusion. Using more flexible needles and shorter penetration depth for irrigation so that we don\'t need to push the needles so far apically.
摘要：
■：本研究的目的是使用三根冲洗针（Max-I-Probe，NaviTipFx和IrriFlex柔性针）。
■：选择下颌前磨牙进行本研究，并使用玻璃小瓶收集挤出的碎屑，并对其进行预称重。样品分为两组：A组（从工作长度刺入1毫米的针），将其细分为三个亚组:亚组A1:通过Max-I-Probe进行灌溉。亚组A2:通过NaviTipFx进行冲洗。A3亚组:通过IrriFlex柔性针进行冲洗。B组(针穿透3mm),分为三个子组：B1子组：Max-I-Probe进行灌溉。B2亚组:通过NaviTipFx进行冲洗。B3亚组:通过IrriFlex柔性针进行冲洗。XP-endoShaper用于化学机械制备。从小瓶中取出后，培养牙齿，然后从培养箱中取出，再次称重三次。取读数的平均值。应用方差分析(ANOVA)和最小显著性差异检验来分析数据。
■：所有的针头都导致碎片挤压。根据穿透深度，组间差异有统计学意义（P≤0.001）。在B3亚组中观察到碎片的最低值，而A2亚组显示出最高的平均值。
■结果表明，针的设计和深度显着影响碎片的挤出。使用更灵活的针头和更短的穿透深度进行冲洗，这样我们就不需要将针头推向顶端。
■：选择下颌前磨牙进行本研究，并使用玻璃小瓶收集挤出的碎屑，并对其进行预称重。样品分为两组：A组（从工作长度刺入1毫米的针），将其细分为三个亚组:亚组A1:通过Max-I-Probe进行灌溉。亚组A2:通过NaviTipFx进行冲洗。A3亚组:通过IrriFlex柔性针进行冲洗。B组(针穿透3mm),分为三个子组：B1子组：Max-I-Probe进行灌溉。B2亚组:通过NaviTipFx进行冲洗。B3亚组:通过IrriFlex柔性针进行冲洗。XP-endoShaper用于化学机械制备。从小瓶中取出后，培养牙齿，然后从培养箱中取出，再次称重三次。取读数的平均值。应用方差分析(ANOVA)和最小显著性差异检验来分析数据。
■：所有的针头都导致碎片挤压。根据穿透深度，组间差异有统计学意义（P≤0.001）。在B3亚组中观察到碎片的最低值，而A2亚组显示出最高的平均值。
■结果表明，针的设计和深度显着影响碎片的挤出。使用更灵活的针头和更短的穿透深度进行冲洗，这样我们就不需要将针头推向顶端。
