本文是出了一种客观确定牙松动的新方法。用瞬态碰撞激震测定牙固有振动半周期Ｔ／２和减幅系数η。以Ｔ／２为主，η为辅，度量牙齿的松动度。对依据的原理从牙周动力学模型出发进行了严密的数学推导；讨论了测试方案；介绍了牙模型测试实验；最后给出实际状态下测试的初步结果。 This article presents a new way to objectively determine tooth loss. The natural tooth vibration half-period T / 2 and reduction coefficient η were measured by transient impact shock. To T / 2-based, η supplemented, measure the degree of tooth mobility. Based on the principle of starting from the periodontal dynamic model for a rigorous mathematical derivation; discussed the test program; introduced the tooth model test experiment; finally gives the actual results of the initial test results.