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A Comparison of Mandibular Transverse Dimensions of a Class I Normal and Class II Patient Population using Anterior to Posterior Measurement Ratios
Uniformed Services University Of The Health Sciences Bethesda United States
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The transverse dimension of the craniofacial complex has long been suspected of following the deficiencies and excesses of the anteroposterior AP dimension. While the AP and even vertical dimensions of the maxilla and mandible have for years been easily assessed with the lateral cephalogram, the relative lack of posterioranterior PA cephs in routine clinical use and a paucity of transverse analyses have made evaluation of the width of the mandible more subjective than the other dimensions. Since earlier analyses by Ricketts and Grummon evaluated the entire mandibular width measured only at the antegonial notch, the addition of more reliable landmarks in both the posterior and anterior mandible offers more information to analyze and a gives a better understanding of the mandibles taper from posterior to anterior. With reliable bilateral anterior and posterior landmarks, an anterior to posterior width ratio can be constructed to quickly assess the transverse dimension of the mandible.
APPROVED FOR PUBLIC RELEASE