Paraffin ribbons that fail to form may be the result of which blade tilt condition?

• A. Too Much Blade Tilt
• B. Too Little Blade Tilt
• C. Either Too Much Or Too Little Blade Tilt
• D. Blade Tilt Does Not Affect Ribbons

Answer: (C)

Understanding how blade tilt affects cutting helps explain why ribbons fail when tilt is not at the right level. The tilt determines the clearance angle between the knife edge and the tissue block. If the tilt is too large, the edge cuts at too steep an angle, increasing drag and tearing the section as it advances. That tearing disrupts the smooth, continuous carry of successive sections, so a clean ribbon won’t form. If the tilt is too small, there isn’t enough clearance for the cut edge to separate cleanly from the block, causing the tissue to drag on the blade or break into chunks, also preventing a continuous ribbon.

So, the formation of a proper ribbon depends on having an appropriate balance of tilt — neither too much nor too little. The ribbon can fail with either extreme, which is why the correct idea is that both too much and too little blade tilt can prevent ribbon formation.