Fig. 1

Pre-operative radiograph tooth #37. Broken instrument was located in mesiobuccal canal.

Fig. 2

Endochuck with K-file size 15

Fig. 3

Broken instrument removed

Fig. 4

Broken instrument

Fig. 5

Post-operative radiograph, straight-on angled film

Fig. 6

Post-operative radiograph, distal oblique view. One distal canal and two mesial canals are evident.


When dealing with broken instruments we should search for the most conservative solution that will allow instrument removal and successive cleaning and shaping of root canal system. Described technique presents useful option in cases of broken instruments beyond curvature.


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  3. Schilder H. Filling root canals in three dimensions, Dent Clin North Am; 723-744, November 1967.
  4. Roda RS, Gettleman BH: Nonsurgical retreatment. In: Hargreaves KM, Cohen S, editors. Cohen’s pathways of the pulp, ed 10. New York: Elsevier; 2011. p. 890-952