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据统计病员50岁时戴用的局部义齿多为牙齿支持型,到50岁以上,多用粘膜支持型义齿。老年患者有其特有的老年性退变症,从而在口腔疾患的诊治中就会出现如下几个问题:①由于组织液的减少,使得基托下粘膜对(牙合)力失去缓冲作用,故粘膜支持义齿的负荷力下降。②基托下粘膜变得薄而干燥,义齿基托与粘膜面紧密接触的关系丧失了。③由于分泌细胞的萎缩,唾液减少,义齿基托固位力明显下降。④因为义齿基托下粘膜组织的弹性降低,在咀嚼运动中义齿基托压迫粘膜的下沉区变大变宽,以及基托边缘封闭不良,义齿基托的稳定度降低.⑤由于老年
According to the statistics of patients 50 years of age wearing partial dentures are mostly dental support type, to 50 years of age, multi-purpose mucosal support denture. Elderly patients have their own characteristics of senile degenerative diseases, which in the diagnosis and treatment of oral diseases will appear the following questions: ① due to the reduction of tissue fluid, so that the base of the mucosa on (occlusal) force to lose the buffer effect, so the mucosa Support the denture load power down. ② under the base of the mucosa becomes thin and dry, the denture base and the mucosal surface in close contact with the loss of the relationship. ③ due to atrophy of secretory cells, decreased saliva, denture base retention significantly decreased. (4) Because the elasticity of mucosal tissue under the denture base was decreased, the sink area of the mucosa was enlarged and broadened when the denture base was pressed during mastication, and the edge of the base was closed badly, and the stability of the denture base was reduced.5)