2. Technical principle

Maxillary osteotomy is mainly aimed at malocclusion caused by maxillary retraction. The operation is to cut in the mouth, peel off the exposed bone tissue layer by layer, and then cut back the maxilla with osteotomy equipment to correct the maxillary retraction, thus correcting the malocclusion.

3. Adapt to the crowd and taboo crowd

1) Adapted population: For simple maxillary retrusion or complex maxillary retrusion with mandibular protrusion, it is suitable for 16- 18 years old.

2) Taboo crowd

People with heart disease, hypertension, diabetes or other important organ diseases.

② those with severe scar constitution.

③ Patients with odontogenic or branchial infection in maxillofacial region.

4 women during pregnancy or menstrual period.

(5) People with psychological barriers.

4. Preoperative design: Initially determine the bone tissue that should be retracted, and mark it.

5. Technical methods

(1) The patient lies flat, and the operating area and surrounding tissues are disinfected.

② Anesthesia: General anesthesia is generally used.

③ Incision was made at the designed site before operation, and the bone tissue was stripped layer by layer to expose the bone tissue.

(4) Osteotomy and moving and fixing of the bone block: cut the maxilla and move it forward to a suitable position, so that the maxilla is in an ideal occlusion state (the maxilla with compound malocclusion needs to remove the redundant part of the mandible while moving the maxilla) and fix it, usually with titanium nails.

⑤ Suture: Rinse the wound repeatedly and sew the periosteum, muscle and mucosa in turn.

⑥ Pressure bandaging.

6. Risks and complications

① Infection: Any operation may cause infection, especially the incision in the oral cavity and eating will increase the possibility of infection. Antibiotics should be taken according to the doctor's advice 5-7 days after operation.

② Maxillary fracture: When the chisel is tapped lightly to cut off hard bone tissue, it is easy to cause fracture if the force is too strong.

③ Hemorrhage and postoperative hematoma: There is more bleeding during osteotomy, which is easy to form congestion.

④ Nerve injury: Nerve injury may be caused during delamination.

⑤ Bilateral asymmetry: When bone tissue is cut off, bilateral bone resection may be asymmetric.

⑥ The effect is not ideal: too much bone tissue removed during the operation may lead to other types of deformities, or too little may not achieve the ideal effect.

⑦ At the same time, the depression in the middle part of the face was obviously improved after the maxilla moved forward. After malocclusion correction, if the nose of individual patients is low, the three-dimensional sense of the middle part of the face can be further increased by rhinoplasty.

7. Recovery time

After operation, the pressure should be increased for 5-7 days, and antibiotics should be taken according to the doctor's advice. After one week, the suture can be removed, and then the mandible can be pulled by the elastic force of the rubber band for 8- 12 weeks to maintain the position of the maxilla and mandible and consolidate the surgical effect. Then the suture can be removed and pulled, and it can basically return to normal in about 3 months, and the recovery situation will be different according to the individual's physique and recovery state.

8. Take notes

1)

① Do not take drugs containing aspirin within two weeks before operation.

(2) before the operation, to ensure good health, no infectious diseases or other body inflammation.

③ Don't make up before the operation.

2) Matters needing attention after operation

① You can chew after operation, but you can't chew or bite for three months.

② Keep the operation site clean and sanitary, and try to avoid water accumulation in the operation area within 7 days after operation.

3 avoid eating irritating foods, such as peppers.

(4) Strictly follow the doctor's advice for medication and follow-up. 1. Label: surgery, level 4 surgery.

2. Technical principle

Mandibular osteotomy mainly aims at malocclusion caused by mandibular protrusion. The operation is to cut the oral cavity, peel off the exposed bone tissue layer by layer, then remove the excessive protrusion of the mandible with osteotomy instruments, and then retreat as a whole to correct the malocclusion, so as to achieve the purpose of correcting the malocclusion.

3. Adapt to the crowd and taboo crowd

1) adaptive population: the age of patients with simple mandibular protrusion or maxillary retraction combined with mandibular protrusion should be 16- 18 years old.

2) Taboo crowd

People with heart disease, hypertension, diabetes or other important organ diseases.

② those with severe scar constitution.

③ Patients with odontogenic or branchial infection in maxillofacial region.

4 women during pregnancy or menstrual period.

(5) People with psychological barriers.

4. Preoperative design: initially determine the bone tissue that should be mandibular protrusion and mark it.

5. Technical methods

(1) The patient lies flat, and the operating area and surrounding tissues are disinfected.

② Anesthesia: General anesthesia is generally used.

③ Incision was made at the designed site before operation, and the bone tissue was stripped layer by layer to expose the bone tissue.

(4) Osteotomy and moving and fixing of the bone block: cutting the mandible, cutting off the excessively protruding bone tissue, and moving back to a proper position, so that the maxilla and the maxilla are in an ideal occlusion state (the maxilla needs to move forward while cutting off and moving back the mandible), which is generally fixed with titanium nails.

⑤ Suture: Rinse the wound repeatedly and sew the periosteum, muscle and mucosa in turn.

⑥ Pressure bandaging.

6. Risks and complications

① Infection: Any operation may cause infection, especially the incision in the oral cavity and eating will increase the possibility of infection. Antibiotics should be taken according to the doctor's advice 5-7 days after operation.

② Maxillary fracture: When the chisel is tapped lightly to cut off hard bone tissue, it is easy to cause fracture if the force is too strong.

③ Hemorrhage and postoperative hematoma: There is more bleeding during osteotomy, which is easy to form congestion.

④ Nerve injury: Nerve injury may be caused during delamination.

⑤ Bilateral asymmetry: When bone tissue is cut off, bilateral bone resection may be asymmetric.

⑥ The effect is not ideal: too much bone tissue removed during the operation may lead to other types of deformities, or too little may not achieve the ideal effect.

7. Recovery time

After operation, the pressure should be increased for 5-7 days, and antibiotics should be taken according to the doctor's advice. After one week, the suture can be removed, and then the mandible can be pulled by the elastic force of the rubber band for 8- 12 weeks to maintain the position of the maxilla and mandible and consolidate the surgical effect. Then the suture can be removed and pulled, and it can basically return to normal in about 3 months, and the recovery situation will be different according to the individual's physique and recovery state.

8. Take notes

1)

① Do not take drugs containing aspirin within two weeks before operation.

(2) before the operation, to ensure good health, no infectious diseases or other body inflammation.

③ Don't make up before the operation.

2) Matters needing attention after operation

① You can chew after operation, but you can't chew or bite for three months.

② Keep the operation site clean and sanitary, and try to avoid water accumulation in the operation area within 7 days after operation.

3 avoid eating irritating foods, such as peppers.

(4) Strictly follow the doctor's advice for medication and follow-up.