I can't answer your question, but I want to wish you the best with your surgery and tell you that you are among a very supportive and knowledgeable group here, many of whom will be able to answer your questions, and they will come.
Here's to a good surgery and speedy and uneventful recovery.

Marlene

Marginal mandibulectomy 6/17/08 resulted in DX of Stage I SCC - gingiva (3 mm) right mandible, buccal side. Clear margins. Occasional social drinker. Smoked last cigarette in 1979. Clear pet: 12/08; 7/20/09. Yay!