[Histonet] poor sectioning
I am attempting to cut various polyethylene and other non-organic tissue
implants embedded in MMA (technovit 9100) using a motorised sledge microtome
and tungsten carbide knife. HOWEVER, I find that I am not getting whole
sections, and that the knife is "skipping" parts i.e cutting thick and thin
in one section and alternating thickness between sections as well. I have
tried tightening all clamps and screws as well as my abdominal muscles, all
to no avail. What is wrong?
Could it be:
a) too great a varance in consistencies throughout the block, ie embedding
material/implant hardness mismatch
b) problems with polymerization
c) incorrect knife angle ( I tried adjusting this)
d) wrong phase of the moon
Am I the only one experienceing this problem and does anyone have
suggestions to help improve my sections?.
BTW, I am trying to avoid sawing and grinding techniques that are way too
time consuming and tedious.
Bone Research Unit
Tel & fax +27 11 717 2298
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