maxillary retraction
Introduction
Introduction to maxillary retraction Maxillary retraction mainly refers to maxillary retraction, the position of the mandible is basically normal, the anterior teeth are reversed, the posterior teeth are close to the middle, and the maxillary retraction is due to the early loss of the deciduous teeth, the posterior teeth move forward, and the anterior teeth move backwards to cause the anterior teeth. Inversion, the posterior teeth are close to the middle; the maxillary retraction is due to the dysplasia of the maxilla, the congenital absence of the upper anterior teeth or the ectopic flank of the lateral gingiva, resulting in anterior teeth reversal, posterior teeth neutral or near-middle, as for cleft palate The resulting maxillary retraction, the front and back teeth are mostly reversed, and the posterior teeth are close to the center. In children with growth and development, parents should pay attention to whether they have bad oral habits. If there is, they should be removed under the guidance of a doctor. When replacing teeth and sprouting teeth, they should go to the hospital regularly to confirm that there is barrier-free, symptomatic treatment. For the maxillary dysplasia, the appearance of a unique facial shape should be treated earlier. In short, the disease is mainly prevention. In the child's growth period, regular oral examination, early detection, early diagnosis and early treatment should be done. basic knowledge The proportion of illness: 0.005% Susceptible people: no specific population Mode of infection: non-infectious Complications: malformation osteitis
Cause
Cause of maxillary retraction
Causes include congenital and acquired factors.
Congenital (35%):
In congenital factors, maternal malnutrition, endocrine disorders and injuries can affect the growth and development of the fetus; the posture and position of the fetus in the uterus, such as the hand or shoulder compression of the semi-mandibular surface may also cause unilateral jaw Bone development disorder.
Acquired (17%):
Acquired factors, bad habits, jaw trauma in childhood, osteomyelitis, malnutrition, endocrine dysfunction, etc. can affect the normal development of the jaw and cause jaw deformity.
Prevention
Maxillary retraction prevention
In children with growth and development, parents should pay attention to whether they have bad oral habits. If there is, they should be removed under the guidance of a doctor. When replacing teeth and sprouting teeth, they should go to the hospital regularly to confirm that there is barrier-free, symptomatic treatment. For the maxillary dysplasia, the appearance of a unique facial shape should be treated earlier. In short, the disease is mainly prevention. In the child's growth period, regular oral examination, early detection, early diagnosis and early treatment should be done.
Complication
Maxillary retraction complications Complications deformity osteitis
Not only causes disturbance of occlusal relationship, but also can cause facial deformity, which seriously affects the patient's oral function and face.
Symptom
Maxillary retraction symptoms Common symptoms Mandibular deformity Oral Candida infection Skin mucosal hemorrhage
1. 1/3 depression in the face, mandibular lordosis.
2. The posterior teeth are neutral and close to the middle, most of the anterior teeth are reversed, and the severe ones are accompanied by posterior teeth.
3. The maxillary temporomandibular dysplasia, the upper lip is depressed.
Examine
Examination of maxillary retraction
Clinical physical examination: The patient's maxillofacial region may have depressions, chewing with pain or chewing weakness. The jaw often develops poorly, and the upper lip can have significant dysplasia.
Diagnosis
Diagnosis of maxillary retraction
diagnosis
The maxillary dysplasia, the mandibular position is basically normal, the anterior teeth are reversed, the 1/3 of the face is concave, the nasolabial angle is sharp, the upper lip is collapsed, the lower jaw is relatively convex, and the concave surface is concave. X-ray cephalometric measurements showed that the SNA angle was smaller than the normal range, the SNB angle was generally normal, the ANB angle was smaller than the normal range, and the jaw angle was negative.
Differential diagnosis
Distal maxillary retraction and true mandibular protrusion: The true mandibular protrusion has a long face shape, and the lower third of the face is longer than the face, and the lower face is 1/3. Most patients have large tongue deformity. The cephalometric analysis can be The maxillary anterior phase is identified.
