Figure 2.

Periodontal ligament biomechanics. (A) Magnitude of the dynamic modulus was increased in the collar region (red) compared to the furcation region (blue) at all frequencies. Quantification demonstrated that these differences were statistically significant at (B) low frequencies and (C) high frequencies. (D) Phase angle of the dynamic modulus showed a distinctive ligament-like 2-peak phase response, with viscoelastic (left peak) and poroelastic (right peak) for each group depicted with corresponding colored arrows. (E) Viscoelastic peak frequency was slightly but significantly higher in the collar than in the furcation region, while (F) poroelastic peak frequency was higher in the furcation region (trend only). Data are presented as mean ± 95% CI. *P < 0.05. ^#P < 0.10.