It's often difficult to find a dentist working on the weekend. Even in the large cities like, New York, Chicago or Los Angeles, it can be hard to find a dentist in his or her office.
You put in your forty, fifty or sixty hours during the week. By the end of a workday you're too tired and too stressed to have someone poking around in your mouth. You put it off until the weekend only to find there's no one available to see you. What do you do? You can't take time away from the work. The boss will frown on it and your paycheck won't like it either.
The One who has massive pain and can't wait until Monday
You started to feel a dull ache in your mouth Friday afternoon. You took some aspirin and kept on working. It's now three in the morning on Saturday and you're mouth and jaw are screaming in pain. You can't wait until Monday to see a dentist. You not sure you'll make it until the sun comes up.
The accident which broke a tooth