crossbite
Introduction
Introduction to posterior teeth The posterior teeth can occur in the deciduous or permanent period, with individual teeth reversing and most posterior teeth reversing; either on one side or on both sides. The treatment of the disease is divided into two types: one side of the posterior teeth and the bilateral posterior teeth. One side of the posterior teeth: a maxillary one-sided pad appliance can be worn, that is, a pad on the normal side of the back teeth is raised to make the opposite side disengage the lock; on the side of the opposite side of the back, a double-curved reed is placed. Adjusting the reed to move the upper back tooth to the buccal side to correct the anti-rear tooth pad. After the anti-rear tooth pad is removed, it should be divided and removed in time. During the correction process, the patient needs to adjust the tooth tip to adjust the tip of the upper back tooth and The cheek tip of the lower posterior teeth is used to establish a good relationship; the bilateral posterior teeth are reversed: the maxillary split base can be used, and the double-sided pad active orthosis can be used to expand the upper arch width by using the split spring. In the lower jaw, the band and the lip arch are made. At each review, the width of the lower arch is adjusted to reduce the width of the lower arch. basic knowledge Sickness ratio: 2% Susceptible people: no specific population Mode of infection: non-infectious Complications: gingivitis periodontal abscess
Cause
Posterior teeth
1. Due to the early loss or retention of the deciduous teeth, the posterior teeth of the permanent teeth are dislocated or the cheeks of the lower posterior teeth are dislocated, which may result in individual posterior teeth.
2. One side is deep and can only be chewed on the other side. Over time, most of the back teeth on one side can be reversed.
3. The abnormal pressure on one side of the lower jaw, such as the long-term habit of one side of the jaw, can make the lower jaw gradually biased to the other side, but also cause the majority of the posterior teeth on the other side.
4. In patients with mouth breathing, the pressure of the two jaws increases, and the upper arch gradually narrows, which can cause the majority of the posterior teeth on both sides.
5. Patients with cleft palate, the upper jaw arch width is underdeveloped, often with bilateral posterior teeth.
Prevention
Posterior teeth prevention
Prevention should start from the fetal period. Mothers should strengthen nutrition during pregnancy and enhance the physical condition of the fetus. It is best to breastfeed the baby in infancy, so that the lower jaw can make appropriate mandibular advancement movement, and the muscles of the tongue, lips and cheeks can be combined to make the jaws. Facial muscles are coordinated and developed. Children's period is a period of vigorous growth and development of children. Not only should we pay attention to proper diet and nutrition, but also pay attention to properly improve the hardness of the food, so that the structure of the child can be fully stimulated and the chewing function can be improved. It is also important to keep your mouth clean.
Complication
Posterior teeth recombination complications Complications gingivitis periodontal abscess
Not only causes disturbance of occlusal relationship, but also can cause facial deformity, which seriously affects the patient's oral function and face.
Symptom
Posterior teeth reversal symptoms Common symptoms Teeth eruption abnormal mandibular protrusion
1. Individual posterior teeth have little effect on chewing function and jaw bone, but may have adverse effects on temporomandibular joint.
2. Most of the posterior teeth are opposite, which has an effect on the function and development of the temporomandibular joint of the maxillofacial region.
3. Most of the posterior teeth on the unilateral side, often combined with the anterior teeth, the lower incisor midline, the ankle and mandible are more biased to the opposite side, causing the left and right asymmetry of the face, the back teeth, the more the number of teeth, the degree of The more severe, the greater the locking effect on the occlusion and the dysfunction on chewing, and the greater the impact on the development of the jaw and the joint.
4. Most of the posterior teeth are reversed, and the anterior teeth are reversed. The anterior jaw is underdeveloped, and the side of the face is also concave.
5. Most of the posterior teeth on both sides are reversed. The width of the upper arch and maxilla is limited. The maxillary arch is narrow and the face is narrow and long, but it is bilaterally symmetrical.
It can be seen that the unilateral posterior teeth are reversed, or the bilateral posterior teeth are reversed, and the anterior teeth can be combined, and the bite, function, maxillofacial development and temporomandibular joint are involved.
Examine
Posterior teeth reversal
X-ray cephalometric measurement.
Diagnosis
Posterior teeth reversal diagnosis
The clinical symptoms are obvious and it is not easy to be confused with other diseases.
