Understanding Dewey’s Modification Of Angle’s Classification

Understanding Dewey’s Modification Of Angle’s Classification

Write a short note on Dewey’s modification.
Or
Write short note on Dewey’s modification for Angle’s class 3 and 3 malocclusion.
Answer. Dewey’s proposed a modification of the Angle’s classification of malocclusion.

Dewey’s divided Angle’s class 1 into 5 types and Angle’s class 3 into 3 types. Class 2 has no types.

Class 1 Modifiation of Dewey

Type 1: Class 1 malocclusion with bunched or crowded anterior teeth.

Type 2: Class 1 malocclusion with protrusive maxillary incisors.

Type 3: Class 1 malocclusion with anterior crossbite.

Type 4: Class 1 malocclusion with posterior crossbite

Type 5: Permanent molar has driftd mesially due to early extraction of second deciduous molar or second premolar.

Class 3 Modifiation of Dewey

Type 1: Individual arches when viewed individually are in normal alignment, but when in occlusion the anteriors are in edge-to-edge alignment.

Type 2: Mandibular incisors are crowded and are in lingual relation to the maxillary incisors.

Type 3: Maxillary incisors are crowded and are in crossbite in relation to the mandibular anterior.