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在使用横串孔瓷牙义齿的过程中,常遇瓷牙脱落,多见前牙、双尖牙脱落,尤其上颌前牙较多见。其脱落原因分析如下。1.早接触:义齿完成后,个别牙有过早接触现象,咬合时负担的(牙合)力较重。2.牙齿倾斜度大:排列瓷牙时唇向倾斜角度大,在承受(牙合)力时向外的张力亦大,牙易脱落。3.瓷牙未排在牙槽嵴上:瓷牙的位置过于排向唇颊侧,因此(牙合)力集中时容易造成瓷牙向外滑脱。4.塑料充填不足:由于充填时压力不够或塑料太
In the use of horizontal porcelain teeth denture process, often encounter porcelain teeth off, more common anterior teeth, bicuspidate off, especially in the anterior maxilla more common. The reasons for its fall as follows. 1. Early contact: dentures are completed, the individual teeth have premature contact phenomenon, occlusal burden (occlusal) heavier. 2. Tooth inclination: arrangement of porcelain teeth when the lip tilt angle, in the endure (occlusal) force outward tension is also large, easy to fall off teeth. Porcelain teeth are not arranged in the alveolar ridges: Porcelain teeth are arranged too much toward the lip and buccal side, so the concentration of (occlusal) force is likely to cause the porcelain teeth to slide outwards. 4. Plastic filling insufficient: due to insufficient pressure when filling or plastic too