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Micro-CT stapes measurement – Measurement of not preserved stapes and comparison with dried onesDr. med. Mathias Hofer
18 April 2018 (online)
Conventional CT is not able to show adequate images of stapes. Our examination is aimed at analysis of biometry of human stapes by measuring not preserved stapes. Besides we wanted to compare the fresh stapes with the data of dried ones.
Scan and measurement of 11 not preserved human stapes by SkyScan 1172, Bruker microCT. Comparison with 12 dried stapes regarding height (plate to head), length, width and area of plate and diameter of anterior and posterior Crus.
The mean was 3,32 mm2 for area of plate, 2,95 mm for length of plate, 1,33 mm for width of plate, 3,4 mm for height from plate to head, 0,72 mm for diameter of respectively anterior and posterior crus, 54,6 ° for the angle between anterior and posterior crus, 0,94 mm for width of the head (short axis) and 1,13 mm for width of the head (long axis).
In comparison of means with the dried stapes the not preserved ones showed significant larger values for area and width of the plate. Also regarding height from plate to head, length of plate and diameter of anterior and posterior crus the fresh stapes represented higher values. However, this was not significant.
The stapes seam to contract during drying. Therefore the not preserved stapes should be the base for analysis of biometry. Further Measurements are necessary to get more precise values.