I’m not certain in what state you reside? I’m also on buprenorphine (Butrans) for chronic pain and Percocet for breakthrough pain. But I began using cannabis and after a year of trial and error I use tincture THC 20mg 3x day and tincture CBD 150mg 3x day and no longer have breakthrough pain.
I also started on a low dose 15mcg x7 days and after a month upped to 20mcg x7 days and love it. Since acute narcotics are short acting I’m sorry to hear you’re having trouble getting pain meds for dental care. On Monday last week I had an implanted post removed due to infection and I only needed Tylenol 500mg x2 for pain and lots of ice packs.