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THE ANATOMY OF THE SMILE John Ray, English naturalist and botanist - 1627-1705 eauty is power and a smile is its sword’ – You might have heard this phrase – it’s not a lie! A 'B Beauty is power; a smile is its sword genuine smile can be infectious – it is a universal language, appreciated worldwide which transcends nations, creed and colour. We use our smiles instinctively - but do we fully understand all the aspects which constitute our smile? A B PROPORTION OF UPPER INCISORS SHOWN Ideally you should have four upper incisor teeth which appear in the smile zone. The two larger incisors in the middle are called central incisors, while the smaller ones on either side are called lateral incisors. 100% of all four upper incisors should be on display when you smile. It is characteristic of the ageing process that people show less of their incisors with time, so a greater amount of incisors shown is usually associated with youthfulness. As a general rule, males show less of their upper incisors and more of their lowers than females. The extent of incisor display is affected by tooth alignment, colour, tooth dimensions and how confident you are when you part your lips. “BROADNESS OF THE SMILE” DENTAL ARCHFORM The broader the smile, the better! A broad smile is determined by the width of the upper arch (when your teeth are in line they form a wide arched shape). Some people have narrow or collapsed arches, so when they smile you can’t see a lot of teeth. In the ideal scenario, you should be able to see the upper pre-molars on both sides of the buccal corridors (See C for buccal corridors). Americans and Africans are known to have broader smiles than Europeans, because of their wider skeletal forms. It’s important to know that jaw expansion using orthodontic devices can produce a broader smile, but only within biological limits! 34 Smiles & F aces The Comprehensive Guide To Orthodontics Octagon Orthodontics www.octagonorthodontics.com AN INTRODUCTION TO ORTHODONTICS


Octagon Orthodontics
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