It’s a must. Brushing followed by rinsing with a mouth wash will make your oral cavity more presentable and yes your dentist definitely won’t be keen on knowing what you ate before the appointment.
Food emitting strong smells like onion and garlic should be completely avoided for obvious reasons.
Lipsticks get all smudged during the dental procedure and also interfere with the selection of shade for filling material and replacement of any teeth.
Dental procedures require abundant planning and are time-consuming so reporting late for the appointment affects the complete schedule. So respect your and your dentist’s time.
Do you do that, if yes… Stop it immediately, there is a lot of experience, time, and material that goes into saving your teeth, and this spending is your investment for healthy teeth, then why bargain.