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除内脏器官组织外,牙齿组织也用来作为机体接触金属元素的生物学指标。作者观察犬的牙齿中镉(Cd)的蓄积对机体的影响,发现犬的上、下颚牙齿Cd的蓄积量不同,并见到乳齿和恒齿的上、下颚牙齿中蓄积量有差异。为证明此点,本试验除Cd以外,还给予易进入硬组织的Pb进行上、下颚的蓄积量比较,同时采用氢气清除法测定上颚、下颚的犬齿齿髓血流量,合并观察血流量和蓄积量: 1.犬的上、下颚齿髓血流量间的差异是幼犬下颚齿髓血流量>上颚齿髓血流量成年犬上颚齿髓血流量>下颚齿髓血流量。 2.腹腔内给予Pb和Cd,其齿中蓄积量
In addition to visceral organs, tooth tissue is also used as a biological indicator of the organism’s exposure to metallic elements. The authors observed the dog’s teeth cadmium (Cd) accumulation on the body and found that dog’s upper and lower jaw teeth Cd accumulation volume is different, and to see the milk teeth and permanent teeth of the upper and lower jaw teeth in the accumulation of volume differences. In order to prove this point, in addition to Cd, this experiment also given to easy to enter the hard tissue Pb upper and lower jaw volume accumulation, while the hydrogen scavenging determination of the maxillary and mandibular canine pulp blood flow, combined observation of blood flow and accumulation Volume: 1. The difference of the dog’s upper and lower jaw pulp blood flow is the pupa jaw pulp blood flow> palate pulp blood flow adult dog palate pulp blood flow> mandibular pulp blood flow. 2. Intraperitoneal administration of Pb and Cd, the amount of accumulation in the teeth