牙齿不齐的原因

Causes of uneven teeth

先天环境因素引起牙齿不整齐：

Congenital environmental factors cause teeth irregularity:

孕妇营养不良，妊娠初期患病，胎儿在母体内或分娩时损伤，也可引起婴儿牙齿畸形；胎儿发育障碍还可能出现多生牙、先天性缺牙、牙齿形态异常、唇系带异常等引起牙齿不整齐。

Malnutrition of pregnant women, early pregnancy illness, fetal injury in the maternal body or during childbirth can also cause dental malformation of infants; fetal dysplasia may also lead to supernumerary teeth, congenital missing teeth, abnormal tooth morphology, abnormal labial ligament and other teeth irregularity.

后天环境因素引起牙齿不整齐：

Teeth irregularity is caused by acquired environmental factors:

后天环境因素引起牙齿不整齐，如儿童患病或营养不良、缺乏足够的咀嚼功能训练、哺乳期人工喂养姿势不正确、呼吸异常造成儿童习惯用嘴呼吸等。

Acquired environmental factors lead to teeth irregularity, such as children's illness or malnutrition, lack of adequate masticatory function training, incorrect artificial feeding posture during lactation, and abnormal breathing resulting in children's habitual mouth breathing.

乳牙疾病引起牙齿不整齐，很多家长认为“乳牙早晚要脱落更换，乳牙有病不必治疗”，这是极错误的看法。乳牙是恒牙的先导，当乳牙自然脱落时，恒牙就会沿着乳牙脱落的位置萌出，如果乳牙过早缺失，会导致邻牙移位，恒牙萌出错位，引起牙齿不整齐。

Many parents think that "deciduous teeth should be replaced sooner or later because of irregular teeth caused by deciduous teeth diseases", which is a very wrong view. The deciduous teeth are the forerunners of permanent teeth. When deciduous teeth fall off naturally, the permanent teeth will erupt along the position where the deciduous teeth fall off. If the deciduous teeth are missing prematurely, it will lead to the displacement of the adjacent teeth, the eruption of the permanent teeth will be dislocated, resulting in irregular teeth.

不良习惯引起牙齿不整齐：

Bad habits cause teeth irregularities:

1. 咬拇指可造成上颌前突；咬上唇可造成下颌前伸，咬下唇可造成上牙前突，吐舌习惯可造成上下牙咬不拢。形成牙齿不整齐。

1. Bitting the thumb can cause maxillary protrusion; biting the upper lip can cause mandibular protrusion; biting the lower lip can cause the upper teeth protrusion; the habit of voicing the tongue can cause the upper and lower teeth to bite together. The formation of teeth is irregular.

2. 咀嚼功能不足：现在的青少年都偏爱巧克力、蛋糕等软性物质，咀嚼功能不足，对牙、颌骨、肌肉的功能刺激不够，就会使牙和面部发育不足。形成牙齿不整齐。

2. Insufficient masticatory function: nowadays teenagers prefer soft substances such as chocolate and cake. Insufficient masticatory function and inadequate functional stimulation to teeth, jaws and muscles will lead to underdevelopment of teeth and faces. The formation of teeth is irregular.

3. 乳牙的龋坏和早失。形成牙齿不整齐。

3. Caries and premature loss of deciduous teeth. The formation of teeth is irregular.

4. 刷牙姿势的不正确都可能引发龋坏。形成牙齿不整齐。

4. Correct brushing posture may lead to caries. The formation of teeth is irregular.

5. 不良的口腔习惯。形成牙齿不整齐。

5. Bad oral habits. The formation of teeth is irregular.

6. 儿童时期常见的口腔不良习惯有吮指、舔牙、偏侧咀嚼等，都可以引发牙齿的畸形。形成牙齿不整齐。

6. Common bad oral habits in childhood, such as sucking, licking and lateral chewing, can cause dental deformities. The formation of teeth is irregular.