David,
Your treatment summary from the original radiation oncology department should still be available. Oral surgeon should want to check radiation mapping, which indicates the high dose radiation areas.

Best regards,
Lottie

CG to husband, dx @ age 65, nonsmoker/social drinker. Dx 5/08 SCC Stage IV, BOT T1N2aM0. 33 IMRT - completed 9/12/08. Induction Chemo (Cisplatin, Taxotere & 5FU), plus concurrent Cisplatin.
1/09 PEG removed; 5/09 neg PET/CT; 5/10 PET/CT NED
Dental extraction & HBOT 2013; ORN 2014; Debridement/Tissue Transfer & HBOT 2016