TABLE 2.
Geometry parameters of the TM for G1, G2, and G3 ear components, derived from the 3D surface meshes obtained from μCT
| TM G1 | TM G2 | TM G3 | |
|---|---|---|---|
| Diameter tympanic ring inferior–superior (mm) (parallel to the direction of the manubrium) | 4.114 | 4.144 | 4.168 |
| Diameter tympanic ring anterior–posterior (mm) (orthogonal to the direction of manubrium) | 4.190 | 4.051 | 4.169 |
| Average diameter of the pars flaccida ring (mm) | 1.492 | 1.335 | 1.413 |
| Angle between manubrium and plane of tympanic ring (°) | 22.6 | 21.4 | 23.4 |
| Distance between umbo and plane of tympanic ring (mm) | 0.765 | 0.760 | 0.769 |
| Surface area pars tensa (mm2) | 17.96 | 17.50 | 17.35 |
| Surface area pars flaccida (mm2) | 2.46 | 2.24 | 2.11 |
| Projected surface area pars tensa onto the plane of tympanic ring (mm2) | 13.69 | 13.64 | 13.22 |
| Projected surface area pars flaccida onto the plane of tympanic ring (mm2) | 1.42 | 1.45 | 1.54 |
| Thickness near annulus (mm)a | ±0.035 | ||
| Minimal thickness between annulus and umbo (mm)a | ±0.007 | ||
| Thickness near umbo (mm)a | ±0.020 |
G1 gerbil 1, G2 gerbil 2, G3 gerbil 3
aMean thickness data from confocal microscopy on 11 gerbils by Kuypers et al. (2005)