Figure 4

Filament types used in the present study.

All filaments are shown on graph paper (edge length, 1 mm) for illustration of the tip size. The shape and the length of the tip coverage can clearly be distinguished. L-TB, long silicon length tubing-based; tip S-TB, short silicon length tubing-based tip; DOC, commercially available filaments (Doccol); BP, bowling pin-shaped silicon tip.