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本研究测量分析了成都市部分幼儿园279名正常乳牙颌儿童的牙弓长度、宽度及牙弓弧长,计算了乳牙冠/牙弓宽度指数、乳牙弓弧长与乳牙冠总宽之差、乳牙弓弧长与恒牙5-|-5牙冠总宽的差及恒尖牙间宽与乳尖牙间宽之差值。结果表明乳牙期牙弓的生长处于相对稳定的状态、乳牙弓中存在间隙、乳牙弓弧长内足以容纳10个后继恒牙。这充分说明只要加强预防保健工作,保护乳牙的牙数、牙体完整从而保持牙弓长度、宽度、牙弓弧长,对于预防牙颌畸形的发生是极为重要的。
In this study, the dental arch length, width and arch arc length of 279 normal children with dental decay were measured and analyzed. The difference of crown / arch width index, arch arc length of primary arch, The difference between total arch length and 5- to -5-crown length of permanent arch and the difference between the width of canine and canine interdental. The results showed that the growth of dental arch during the periodontal decillation was relatively stable. There was a gap in the primary arch of the deciduous teeth, which was enough to accommodate 10 consecutive permanent teeth. This fully shows that as long as the preventive health care work to protect the teeth of deciduous teeth, tooth integrity to maintain the dental arch length, width, arch arc length, for the prevention of dento-mal deformity is extremely important.