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覆盖义齿又称为上盖义齿,系指义齿的基托组织面直接覆盖并支持在健康的或已做过处理的牙根或牙冠上的全口义齿。覆盖义齿早在一百多年前就有人提出,覆盖义齿对于缺牙后下颌牙槽嵴的吸收,原因是对牙齿拔除后牙槽骨因失去功能刺激,发现拔除后两个月或三个月内牙槽骨水平吸收2~4毫米,在拔除后九十天愈合调间骨嵴减少总量为牙槽嵴的15%,占第一年愈合调间的25%,下前牙第一年吸收4毫米,五年后吸收6~7毫米,
Overdenture, also referred to as overdenture, is a complete denture that covers the denture’s base tissue surface directly and supports a healthy or treated root or crown. Overdenture as early as a hundred years ago, it was suggested that the overdenture for tooth loss after mandibular alveolar ridge absorption due to loss of function of the alveolar bone after tooth extraction and found that two months or three months after removal Within the alveolar bone horizontal absorption of 2 to 4 millimeters, ninety days after removal of intercostal bone crest reduction total alveolar ridge of 15%, accounting for 25% of the first year healing intercourse, the first year of the next anterior teeth Absorption 4 mm, five years after the absorption of 6 to 7 mm,