PMC2813086_01
K-file showing the working part of the file (16 mm)
JCD-11-42-g001.jpg
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F0001
The remaining part of the separated instrument was examined, and the distance from the tip of the fractured file to D16 (11 mm) was measured and this value was subtracted from the original length, 16 mm, of the file [Figure 1].
K-file showing the diameter at the fractured end of the file
JCD-11-42-g002.jpg
PMC2813086_01_JCD-11-42-g002.jpg
F0002
Now the tip diameter at the fractured level was calculated (0.02 + 0.10 = 0.12 mm) [Figure 2].
Masserann extractor, along with the removed fragment
JCD-11-42-g003.jpg
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F0003
When the tightest grip was felt by the tactile sense, the entire assembly was rotated in an anticlockwise direction to unscrew the fragment from the dentin and withdrawn to see the fragment retrieved [Figure 3].
(a) - Radiograph showing the separated file in the distobuccal canal; (b) - Trephan centered over the fragment; (c) - Reobturated 16
JCD-11-42-g004.jpg
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F0004
The extractor tube with a diameter of 1.2 mm was slid into the trough to sleeve the fragment [Figure 4b]; and following radiographic confirmation of this, the plunger rod was turned manually inside the extractor tube in a clockwise direction to grip the fragment against its wall.
PMC2813086_02
(a) - Radiograph showing the separated file in the distolingual canal; (b) - Extractor with plunger sleeving and gripping the fragment; (c) - Post-obturation 36, 37
JCD-11-42-g005.jpg
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F0005
A radiograph was taken to confirm the level of separation of the instrument [Figure 5a]. Masserann technique was used for retrieval of the instrument [Figure 5b]; and after several attempts, the instrument was retrieved successfully.
PMC2813086_03
(a) - Radiograph showing the separated file; (b) - Extractor with plunger sleeving and gripping the fragment; (c) - Post-endodontic restoration given
JCD-11-42-g006.jpg
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F0006
During cleaning and shaping, a #35 NiTi hand file was separated at the junction of middle and apical third of the root canal [Figure 6a]. Masserann kit was used to remove the fractured segment [Figure 6b].