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Natural frequency analysis of tooth stability under various simulated types and degrees of alveolar vertical bone loss

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Table 1 Mechanical properties used in the finite element model Young’s modulus (GPa) Density(g/cm3) Poisson’sratio Enamel 77.9 3.0 0.33 Dentin 16.6 2.2 0.31 Pulp 0.006 89 1.0 0.45 PDL 0.05 1.1 0.45 Compact bone 10 1.4 0.26 Cancellous bone 0.5 1.4 0.38
Fig. 4 The first vibration mode shapes of the finite element model with normal periodontal  condi-tions plotted from (a) three-dimensional and (b) side views
Fig. 6 Changes in the natural frequency value of the model with various types and degrees of  two-sided bone losses

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