Yes, it's possible that a dentist will be able to fill a cavity on the same visit as its diagnosed. If you suspect that you have a cavity, you should inform the receptionist when making your appointment so that the dentist can know what to expect right from the start. Good communication is key in ensuring that you get the treatments you need and all of your concerns addressed. To find out more, check out our blog article "First Visit to Dentist: What to Expect."