If you don't have a regular family dentist that you can go to whenever a dental situation arises, such as needing a cavity filled or a new crown, you might want to consider finding yourself a new dentist in your area.
You don't have to have a family dentist to be treated for dental issues like a cavity, but it is a good idea to be prepared, because you never know when a dental emergency situation may arise. Being part of a dental clinic when a dental emergency happens will give you a better chance at being seen right away, as opposed to not having a family dentist.
Also, if you are part of a clinic that you can be seen at regularly then you will also be on a good path towards having healthy teeth and gums, because you will have them looked at and treated on a regular basis. That's good for both you and your dentist, because you won't be slacking on your dental care needs.
The best way to find a dentist in your area is by asking your co-workers, friends, and family members for a referral. You'll have a much easier time finding a dentist if you already have an in with somebody you know. If that route doesn't work for you then you're going to have to do some investigating, and luckily for you, that's not the hardest thing to do, thanks in large part to the Internet.
All you have to do to get a new dentist is this - let's say you've recently moved to Mississauga, Ontario for an example. You open up your web browser, go to your favourite search engine website like Google, and start a new search for dentists serving the city of Mississauga. Your search results should come back with a number of hits for local dentists in Mississauga that will provide you with not only contact information for this dentist and others, but you should also be able to read reviews and ratings from independent sites. As well, many dentists will have official clinic websites you can peruse that will tell you everything about them, such as what services they provide, and what their costs are.
From there you can start making phone calls to see which dentist are taking new patients, and hopefully you'll one that will take you on as a new patient as soon as possible!