Scholarlink

Background <p>The fracture of an endodontic instrument within the root canal system can occur during root canal therapy, complicating thorough cleaning and shaping. Consequently, managing the broken fragment becomes crucial.</p> Methods <p>Eighty Nickel-titanium (NiTi) #20&#xa0;K-files (Mani, Tochigi, Japan) were cut 8&#xa0;mm from the tip, fixed into a corkboard, and classified into five groups (<i>n</i> = 14 each). The microtube-based methods included: microtube with cyanoacrylate glue (group 1), light-cured flowable composite resin (group 2), wire (group 3), internal shaft (group 4), and laser (group 5). Each method grasped the separated instrument's free end above the corkboard, and a pull-out test was performed using a universal testing machine(UTM). Additionally, 10 samples were separated in extracted canine root canals, and the temperature of the outer surface of the root was measured using the microtube and laser methods.</p> Results <p>Groups 1 and 4 exhibited significantly greater pull-out force compared to the other groups (<i>p</i> &lt; 0.001). Groups 2 and 5 demonstrated significantly lower pull-out forces (<i>p</i> &lt; 0.001). In Group 5, the temperature increase was 11&#xa0;°C on the tube surface and 3&#xa0;°C on the root surface.</p> Conclusion <p>All microtube-based techniques are effective for fractured instrument removal, with cyanoacrylate glue and laser methods being particularly suitable for cases that require higher force.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comparison of the pull-out force of different microtube-based methods in fractured endodontic instrument removal: An in-vitro study

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年1月2日

查看全文
  • Nasim Hashemi,
  • Mohsen Aminsobhani,
  • Mohammad Javad Kharazifard,
  • Fatemeh Hamidzadeh,
  • Pegah Sarraf

摘要

Background

The fracture of an endodontic instrument within the root canal system can occur during root canal therapy, complicating thorough cleaning and shaping. Consequently, managing the broken fragment becomes crucial.

Methods

Eighty Nickel-titanium (NiTi) #20 K-files (Mani, Tochigi, Japan) were cut 8 mm from the tip, fixed into a corkboard, and classified into five groups (n = 14 each). The microtube-based methods included: microtube with cyanoacrylate glue (group 1), light-cured flowable composite resin (group 2), wire (group 3), internal shaft (group 4), and laser (group 5). Each method grasped the separated instrument's free end above the corkboard, and a pull-out test was performed using a universal testing machine(UTM). Additionally, 10 samples were separated in extracted canine root canals, and the temperature of the outer surface of the root was measured using the microtube and laser methods.

Results

Groups 1 and 4 exhibited significantly greater pull-out force compared to the other groups (p < 0.001). Groups 2 and 5 demonstrated significantly lower pull-out forces (p < 0.001). In Group 5, the temperature increase was 11 °C on the tube surface and 3 °C on the root surface.

Conclusion

All microtube-based techniques are effective for fractured instrument removal, with cyanoacrylate glue and laser methods being particularly suitable for cases that require higher force.