Dental arch morphology in normal occlusions
2011
Aim: The aim of this study was to identify the prevalence of 3
different mandibular dental arch morphologies in individuals with
natural normal occlusion. Methods: Fifty-one mandibular dental casts of
Caucasian individuals with natural normal occlusion were digitized.
Each was without a history of orthodontic treatment and presenting at
least four of the six keys to normal occlusion described by Andrews.
Twelve orthodontists evaluated the prevalence of the square, oval and
tapered arch shapes by analyzing the mandibular digital images.
Results: The most prevalent dental arch shape was oval (41%), followed
by square (39%), and tapered (20%) shapes. Conclusions: During leveling
and alignment phases, when elastic-alloy-wires are greatly used, the
orthodontist could use any of the studied arch shapes (oval, square,
tapered), once the prevalence of all of them was similar.
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