Table 3.
Peak von Mises stress in the working side zygomatic arch, strain energy and mechanical efficiency performance of the Callithrix and Saguinus models under simulated molar-biting (15° gape) and bark-gouging (50° gape) loads. Percent difference is the absolute value of the difference between the two values divided by the value for Callithrix. Higher performance is indicated in bold.
| Loading condition | Peak stress (MPa) | Strain energy (J) | Mechanical efficiency (Fbite/Fmuscle) |
|---|---|---|---|
| Molar biting (15° gape) | |||
| C. jacchus | 52.6 | 1.46 × 10−3 | 0.316 |
| S. fuscicollis | 47.6 | 1.65×10−3 | 0.352 |
| Difference (%) | 10 | 13 | 11 |
| Bark-gouging (50° gape) | |||
| C. jacchus | 168 | 1.01×10−2 | 0.053 |
| S. fuscicollis | 120 | 0.75 × 10−2 | 0.030 |
| Difference (%) | 29 | 26 | 43 |