1. The dentition is crowded, the arch of canine tooth protrusion (tiger tooth) does not match the size of teeth, and there is not enough space, which leads to overlapping and crowded teeth, and the second molar erupts at the latest when the mandible is held to the lingual side.
2. The gap between teeth does not match the size of teeth. If the teeth are too small and Mrs. Bow is too big, the teeth will be sparsely arranged with gaps.
3. Buckteeth can be divided into dental and skeletal buckteeth, and most of them can be treated by traditional corrective methods. Patients with severe buck teeth need to cooperate with oral surgery to achieve ideal appearance and occlusal function.
4. Maxillary anterior teeth and mandibular anterior teeth should be closed, and the vertical coverage is normal at 2mm. If the upper and lower incisors can't bite, the upper and lower incisors can't bite the food and the mouth won't close.
5. crossbite is also called crossbite, that is, the mandibular anterior teeth bite out of the maxillary anterior teeth, commonly known as floor cover, which will cause functional obstacles such as chewing and pronunciation in addition to aesthetic problems. If it is malocclusion caused by abnormal bony jaw, orthognathic surgery is often needed.
6. The long-term defect of oblique teeth leads to the inclination of adjacent teeth or the increase of opposite teeth, which makes it difficult to make dentures. At this time, it is necessary to straighten the inclined teeth by correction, so that the roots have good parallelism and are convenient for the reconstruction of dentures.