Abstract
To evaluate the accuracy of bone mineral composition determination by electron microprobe analysis (EDX) the measurements have been compared to instrumental neutron activation analysis (INAA) and chemical analysis (ICPES). Bone specimens from five femoral heads were used. The trabecular content of calcium (Ca) and phosphorus (P) was analyzed by the three different methods. The FDX method allows for a microstructural analysis of intact, methylmetacrylate-embedded, undecalcified bone and the measuring points can thus be distinctly identified centrally in each trabecula. The analysis yielded 25.8±0.7 wt% Ca and 10.5±0.1 wt % P, compared with 22.2±0.5 and 23.0±1.0 wt % Ca, and 9.83±0.21 and 10.02±0.44 wt % P for INAA and ICPES, respectively. The EDX analysis was calibrated by consecutive measurements of a hard, pressed tablet of hydroxyapatit of known content. The mean Ca content deviated with-0.38 wt % from the given content and P with-0.89 wt %. We could not verify any particular interference from the embedding procedure, however, it is possible that the relatively lower P content still may reflect this. The magnesium (Mg) concentration was 0.31±0.02 wt % by EDX and 0.26±0.02 wt % by INAA. The EDX analytical method provides a useful tool for simultaneous elemental quantification in bone. It has the advantage of permitting the use of cation bone biopsy material and thus allowing for a unique microstructural evaluation of the degree of mineralization. By comparison with other established methods, the assessment of accuracy and reliability indicates that the measurements are well in range for the major constituents, Ca and P, whereas INAA is more sensitive in determining trace elements.
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References
Glimcher MJ, Bonar LC, Grynpas MD, Landis WJ, Roufosse AH (1981) Recent studies of bone mineral: Is the amorphous calcium phosphate theory valid? J Crystal Growth 53: 100–119
Grynpas MD, Pritzker KP, Hancock RGV (1987) Neutron activation analysis of bulk and selected trace elements in bones using a low flux SLOWPOKE reactor. Biol Trace Element Res 13: 333–344
Cohen AM, Talmi YP, Floru S et al. (1991) X-Ray microanalysis of ossified auricles in Addison's disease. Calcif Tissue Int 48: 88–92
Armstrong WD, Singer L (1965) Composition and constitution of the mineral phase of bone. Clin Orthop Rel Res 38: 179–190
Green LJ, Eick JD, Miller WA, Leitner JW (1970) Electron microprobe analysis of Ca, P, and Mg in mandibular bone. J Dent Res 49(3): 608–615
Wergedal JE, Baylink DJ (1974) Electron microprobe measurements of bone mineralization rate in vivo. Am J Physiol 226(2): 345–352
Mellors RC, Solberg TN (1966) Electron microprobe analysis of human trabecular bone. Clin Orthop Rel Res 45: 157–167
Mellors RC, Solberg TN, Huang CY (1964) Electron probe microanalysis. I. Calcium and phosphorus in normal human cortical bone. Lab Invest 13(3): 183–195
Obrant KJ, Odselius R (1985) Electron microprobe investigation of calcium and phosphorus concentration in human bone trabecular—both normal and in posttraumatic osteopenia. Calcif Tissue Int 37: 117–120
Daley TD, Jarvis A, Wysocki P, Kogon SL (1990) X-Ray microanalysis of teeth from healthy patients and patients with familial hypophosphatemia. Calcif Tissue Int 47: 350–355
Hancock RGV, Grynpas MD, Apert B (1987) Are archeological bones similar to modern bones? An INAA assessment. J Radiol Nucl Chem Art 110: 283–291
Grynpas MD, Huckel CB, Pritzker KP, Hancock RGV, Kessler MG (1989) Bone mineral and osteoporosis in aging Rhesus monkeys. Puerto Rican Health Sci J 8: 197–204
Hirschman A, Sobel AE (1965) Composition of the mineral deposited during in vitro calcification in relation to the fluid phase. Arch Biochem Biophys 110: 237–243
Goldner JA (1938) A modification of the Masson trichrome technique for routine laboratory purposes. Am J Pathol 14: 237
Merz WA, Schenk RK (1970) Quantitative structural analysis of human cancellous bone. Acta Anat 75: 54–66
Wiklund PE (1980) The clinical significance of unmineralized bone matrix in man. Thesis, Lund, Sweden
Åkesson K, Önsten I, Obrant KJ (in press) Histomorphometric evaluation of periarticular bone in rheumatoid arthritis and in osteoarthritis of the hip. Acta Orthop Scand
Grynpas MD, Alpert B, Katz I, Lieberman I (1991) Subcondral bone in osteoarthritis. Calcif Tissue Int 49: 20–26
Shimizu S, Shiozawa S, Shiozawa K, Imura S, Fujita T (1985) Quantitative histologic studies on the pathogenesis of periarticular osteoporosis in rheumatoid arthritis. Arthritis Rheum 28(1): 25–31
Nicholson WAP, Ashton BA, Höhling HJ, Quint P, Schreiber J (1977) Electron microprobe investigations into the process of hard tissue formation. Cell Tissue Res 177: 331–345
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Åkesson, K., Grynpas, M.D., Hancock, R.G.V. et al. Energy-dispersive X-ray microanalysis of the bone mineral content in human trabecular bone: A comparison with ICPES and neutron activation analysis. Calcif Tissue Int 55, 236–239 (1994). https://doi.org/10.1007/BF00425881
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DOI: https://doi.org/10.1007/BF00425881