Dental-maxillofacial Deformities
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Dental-maxillofacial Deformities. Dept. of Oral & Maxillofacial Surgery School of Stomatology LI Qing-yun. Phase I. Presurgical treatment. Orthodontics Surgical plan. Phase II. Surgical treatment. Mandible Maxilla. Phase III. Postsurgical treatment. Orthodontics

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Dental-maxillofacial Deformities

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Dental-maxillofacial Deformities

Dept. of Oral & Maxillofacial Surgery

School of Stomatology

LI Qing-yun


Phase I

Presurgical treatment

  • Orthodontics

  • Surgical plan

Phase II

Surgical treatment

  • Mandible

  • Maxilla

Phase III

Postsurgical treatment

  • Orthodontics

  • restorative/prosthetic treatment

  • follow-up


Presurgical Treatment Phase

Presurgical Treatment Phase

  • Presurgical orthodontics

  • Final surgical planning


Objectives —— Presurgical orthodontics

  • Decompensationdental compensation for skeletal deformity angulation of teeth accentuate the deformity


Objectives —— Presurgical orthodontics

  • Alignment of the arches

  • Compatibility of the arches


Final Surgical Planning

  • Visual Treatment Objective, VTO


Final Surgical Planning

  • Computerized imagingCASSOS


Final Surgical Planning

articulator

  • Model Surgery

Exact surgical movements

(distance, direction)

Postoperative occlusion

Face-bow


Surgical Treatment Phase

  • Surgeries for maxillary deformity

  • Surgeries for mandibular deformity


Surgeries for maxillary deformity

  • Segmental osteotomy (Anterior / Posterior)

Indications:

- maxillary protrusion

- marked protrusion of maxillary teeth

- open bite


Surgeries for maxillary deformity

  • Le Fort I osteotomy (total or segmental)

Indications:

- maxillary deformities

- mandibular deformities


Surgeries for maxillary deformity

  • Le Fort I osteotomy

  • Le Fort II or III osteotomy

Indications:

- midface deficiency


SNA88°

SNB92°

ANB 4°


Surgeries for mandibular deformity

  • Sagittal split ramus osteotomy, SSRO

Indications:

- mandibular excess

- mandibular deficiency

- mandibular asymmetry

back

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rotate


Surgeries for mandibular deformity

  • Vertical ramus osteotomy

Indications:

- mandibular excess

- mandibular asymmetry (combined with SSRO)

back


Surgeries for mandibular deformity

  • Subapical osteotomy

Indications:

- bimaxillary protrusion / open bite

- leveling the plane of occlusion

- uprighting anterior teeth


Surgeries for mandibular deformity

  • Body osteotomy

Indications:

- mandibular excess (body) combined with ramus procedure or not

- open bite / spee’s curve reduction


Surgeries for mandibular deformity

  • genioplasty

Indications:

- chin deformities


Perioperative complications

  • Airway obstructionedema / bleeding / displacement… …

  • Bleeding

  • Infection

  • Necrosis of teeth / bone

  • Healing

  • Injury of nerve


Postsurgical Treatment Phase

  • Completion of orthodontics

  • Postsurgical restorative/prosthetic treatment

  • Follow-up


SNA88°

SNB81°

ANB 7°


SNA84°

SNB81°

ANB 3°


SNA88°

SNB92°

ANB -4°


SNA88°

SNB86°

ANB 2°


SNA88°

SNB86°

ANB 2°


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