Ortho unit 2 Puri, Class II

Ortho unit 2 Puri, Class II

Main skeletal causes Class II?

Maxillary excess, mandibular deficiency, or both.

Div 1 soft tissues?

Incompetent lips.

Div 2 soft tissues?

Hypertonic lips, straight profile

Class II incomplete?

Cusp‑to‑cusp; usually mesiorotation of upper molar.

How to diagnose mesiorotation?

Line from DB cusp to MP cusp should project to distal canine.

Typical Class II profile?

Convex

Mentolabial sulcus in Class II?

Deep

Div 1 arch form?

Narrow V‑shape.

Div 2 arch form?

Broad, square

Div 1 bite?

Increased overjet

Div 2 bite?

Deep bite

ANB > 4° means?

Skeletal Class II.

SNA ↑ means?

Maxillary protrusion.

SNB ↓ means?

Mandibular retrusion.

Ricketts facial convexity >4 mm?

Class II tendency

Main habits causing Class II/1?

Thumb sucking, pacifier, bottle, atypical swallow, lip interposition, mouth breathing

Habit severity depends on?

Frequency, intensity, duration.

Thumb sucking effects?

U1 proclination, L1 retroclination, narrow palate, open bite.

Main etiologic factor?

Vertical dimension reduction.

Facial pattern?

Brachyfacial

Soft tissues?

Hypertonic lips.

First step tto?

Determine growth potential.

What must be controlled before treatment?

Etiological factors.

Growth remaining + maxillary cause? (tto options)

Headgear

Growth remaining + mandibular cause? (tto options)

Functional appliances (Twin Block, Activator, Bionator).

No growth remaining tto options?

Extractions, distalisation, camouflage, surgery

Div 1 tto, What must be corrected first?

Overbite, and then overjet

Div 1 tto, How to flatten Curve of Spee?

Space creation

Div 2 tto, First step?

Convert div 2 to div 1 (proline upper incisors)

Div 2 tto, Why avoid extractions?

Deep bite worsens

Div 2 tto, Overbite reduction methods?

Intrusion, posterior eruption, extrusion, labial inclination, surgery