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. 2020 Jul 1;19:55. doi: 10.1186/s12938-020-00799-8

Fig. 2.

Fig. 2

A freeze frame of the video the moment before the vertical PLA (a), vertical ABS (b) and horizontal ABS (c) dilators snapped. The approximate angle of bending before snapping was estimated as 10°, 12° and 40°, respectively. SLS nylon 3D-printed dilator (d) after applying approximately 5 kg of manual pressure to the tip bent but did not break