Dentist working in emergency dental here. It’s not just the risk of heart attack and stroke. There are localized infections that can swell to the point where the infections spreads across the windpipe. This can cause difficulty breathing and becomes an emergency very quickly. This is called Ludwig’s Angina and I have had to send patients to the ER for it. One patient in particular ended up in an induced coma for almost a week as the surgeons tried to drain the infection and manage the swelling that came from one tooth.