class II div1 malocclusion

Treatment of class II malocclusion

According to the incisors, inclination, class II can be divided to two types:
A. Class II div.1 (cl II1)
B. Class II div.2 (cl II2)

Class II: it can be defined according to the angles, classification that the mesiobuccal cusp of the upper permanent 1st molar pass 1/2 or complete cusp width to the buccal developmental groove of the corresponding lower molars, there will be increase in the (OB and OJ). On the other hand, the upper canine is either 1/2 or complete cusp width mesial to the lower canine (in the mesial slope of the lower canine).

However, patient with class II sometimes is seems to have the molar classification class I but there is a proclination of anterior teeth (increase OJ) or we can see the canine classification is class I and the molar classification class II. The incidence about 15-20% for Caucasians, the cl II occlusal relationship mostly provides the major load of orthodontic appliance treatment in many communities.

Class II Division 1, according to British Standards incisor classification, the lower incisors, edges lie posterior to the cingulum plateau of the upper incisors. The upper central incisors are proclined or of average inclination and there is an increase in overjet.
Etiologically, sometimes a skeletal cl I or cl III can be associated with cl II dental pattern especially in the presence of bad habit or abnormal breathing.

Etiological factors of class II div1
a. Skeletal factor. (mostly cl II)
b. Soft tissue factor. (unfavorable)
c. Dental factor.