Root canal on a molar, was a re-treatment. Worked out of Dr. Sayers office in Kona. Gave me more shots, and more novacane, than any dentist I've ever been to. Roughest dentist too. So rough, that if he hadn't made me pre-pay, I wouldn't have gone back to let him finish. Sorry I did. He's spent 5 hours on this tooth, still hasn't finished, and I now have LOCK JAW. He told me the lock jaw was a result of having my mouth open so long, I thought his rough treatment might be because he didn't like me, but heard from a church friend that Dr. Ching had just done a root canal on his wife, and that his wife also thought he was the roughest she'd ever had.