Summary
Sharpey fibre bone specimens from cranial sutures and muscle attachment sites of rhesus monkeys and rats, and tooth sockets of several mammals (man, rhesus monkey and rat specimens mainly) were fixed, and either dried by critical point drying or freeze drying, or made anorganic with 1,2 ethane diamine or sodium hypochlorite, washed and airdried. The bone was examined by scanning electron microscopy. The packing density of the extrinsic fibres affected their cross sectional shape, the well separated fibres being the most uniform. Long parallel rows and groups of extrinsic fibres were observed. The fibre units that made up the Sharpey fibre bundles were sometimes distinct and mineralized as units. Mineralization was generally similar to the varied patterns encountered in root cementum. The diameters of the extrinsic fibres were similar at all sites and in all species; those in socket bone differed little from those in cementum. The intrinsic fibre orientation, although constant over fairly large areas, showed no consistent relation to the direction of entry of the extrinsic fibres.
We would like to thank Mrs. E. Bailey and Mr. P. S. Reynolds for technical assistance.
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This work has been supported by grants from the Medical Research Council and the Science Research Council.
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Jones, S.J., Boyde, A. The organization and gross mineralization patterns of the collagen fibres in sharpey fibre bone. Cell Tissue Res. 148, 83–96 (1974). https://doi.org/10.1007/BF00224320
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DOI: https://doi.org/10.1007/BF00224320