A beginner's guide to the clinical differences between Class II division 1 and division 2 malocclusion; a single slide poster like presentation with tabulated differences according to intra and extraoral features.

1. Clinical Differences in Class II Malocclusion
A. EXTRAORAL FEATURES
1. Face Profile
Convex profile Straight or slightly convex
2. Lip morphology Incompetent or potentially competent. Upper lip usually
short and protrude over lower lip
Usually competent or incompetent with habitually
together
3. Nasolabial angle Decreased Increased
4. Mentolabial sulcus Deep Deep and well marked
5. Frankfurt- Mandibular
plane angle
Normal or increased Usually decreased in case of deep bite
6. Mandibular path of
closure
Endogenous or forward path Downward and forward movement
7. Inter-incisal angle Reduced Increased
B. INTRAORAL FEATURES
1. Occlusal relationships
(Angle’s Classification)
Molar – Class II
Canine – Class II
Incisors- Class II, Division 1
(proclination of all 4 incisors)
Molar – Class II
Canine – Class II
Incisors – Class II , Division 2
(Retroclination of central
Incisors)
2. Overjet Increased Decreased
3. Overbite 1. Normal or increased; May be complete, incomplete.
2. Can be reduced
3. Decreased with open bite.
increased.
4. Dental Arch May be narrow at the anterior segment Broad and short at the anterior segment
5. Extra features Spacing of the anterior segment.
History of abnormal perioral habit
like thumb sucking
Crowding of anterior segment. May have family history
Division 1 Division 2
Author: Taseef Hasan Farook, BDS (DU)
Images collected from Google and Slideshare. This is for educational purposes only

2. THANK YOU
By: Taseef Hasan Farook, BDS (DU)
https://www.linkedin.com/in/dr-taseef-
hasan-farook-a52a5658/