Jonathan Lajoie (I) Jonathan Lajoie was born in 1980 in Montreal, QuÃ©bec, Canada. He is an actor, known for The League (2009), Let's Be Cops (2014) and Show Me Your Genitals (2008).
Universal Numbering System. Tooth number 1 is the tooth farthest back on the right side of your mouth in the upper (maxillary) jaw. Numbering continues along your upper teeth toward the front and across to the tooth farthest back on the top left side (which is number 16).
After a dental hygienist cleans your teeth, the dentist will come in to examine them. Out of nowhere, he or she rattles off alpha-numeric jargon: 3MOD, 5DO, 13MFD and so on. The dentist is using a form of dental shorthand. Numbers represent teeth that have cavities or other problems. The upper right, third molar or wisdom tooth (this is the one farthest back in the mouth) is tooth number one. Tooth 16 is the upper left, third molar. Number 17 is the lower left, third molar.