Analysis Of Class II Malocclusion Surgical

Facial Examination

Face Shape: Basically normal.

• Facial Symmetry: Slightly fuller on the left side.

• Chin Midline: Shifted to the left.

• Labiomental Angle: Basically horizontal.

• Facial 1/3 Convexity: Convex.

• Labial Dimple: None.

• Upper Lip: Short.

• Lower Lip: Everted.

Profile Analysis:

• Face Shape: Convex.

• Nasolabial Angle: Small.

• Upper Jaw: Protrusive.

• Lower Jaw: Retruded.

Intraoral Examination

Bite Relationship: Both sides exhibit nearly neutral canine relationships.

Overbite and Overjet: Largely normal.

Occlusal Plane: Essentially normal.

Mild Crowding in Both Upper and Lower Dental Arches.

Midlines Align Properly.

Both Upper and Lower Dental Arches are slightly ovoid.

Pre-Orthodontic Head Measurement and Analysis

Diagnosis：

Skeletal Class II, Upper Protrusion

Lower Upper Lip Inclination, Mild Crowding in Both Upper and Lower Teeth.

Soft Tissue Lateral Profile Convexity.

Diagnosis: Angle Class I, Skeletal Class II.

Treatment Plan

Orthodontic and Orthognathic Combined Treatment

1.Surgery Takes Priority: Extraction of all four 2nd molars (8s), four 1st premolars (4s), Lefort I maxillary impaction surgery, anterior segmental maxillary impaction surgery, and mandibular anterior subapical impaction surgery.

2.Post-surgery orthodontic treatment to close remaining gaps and adjust occlusal relationships.

3.Retention to maintain the treatment outcomes.

Treatment Process

Postoperative  Photos

Summary:

■Surgery First

1. Rapidly improve facial appearance; accelerate tooth movement;

2. High patient compliance and treatment satisfaction

■ Upper Jaw Lefort I Type Osteotomy + Segmental Anterior Maxillary Osteotomy

Lower Jaw Apical Osteotomy

1. Reduce impact on the nose and upper jaw sinus

2. Fast patient recovery, significantly shortens the entire treatment duration.