It takes one-tenth of a second to make a first impression. That’s 100 times faster than it took you to read this sentence. But what happens in that blink of an eye? When meeting someone, one-third of Americans notice teeth before any other facial feature. And first impressions matter. That initial snapshot captures key elements of the truth, according to psychology research.

Make a great impression on every first impression. Here are 3 important first impressions that your smile (and dental health!) can make or break:

1. First Date

Your outfit isn’t as important as you think. Both men and women cite a smile as #1 physical feature to attractiveness. Good news for bad hair days. Single adults admitted they judge a potential date on their teeth—significantly more than hair or outfit. But it takes more than flashing your 100-watt smile to make a bright impression. 74% of women won’t pucker up if they suspect poor oral health, according to a Delta Dental survey. And if that’s not enough to make you brush, bad breath was one of the top deterrents for singles seeking a second date.

2. First Interview

Candidates who greet potential employers with a smile rate more hirable and competent than candidates who didn’t smile. Remember to take care of your smile for the job you want, not the job you have. 90% of executives surveyed said they would hire a non-smoker over a smoker if their qualifications were equal, according to a Seattle University study.

3. First Speeding Ticket

You’re weaving through traffic, unintentionally speeding, and then the siren surrounds you. As you pull to the side, remember your strategy: Good manners and a smile. Those who smile are seen as cooperative, and therefore more likely to be trusted. Take this officer’s advice, “If you can make me laugh, you might get a break.”

Grin it to win it! Let your smile set the tone for a favorable first impression.