Abstract
Imaging with technetium-99m methylene diphosphonate (99mTc-MDP) is established in the diagnosis of infection, neoplasia and ischaemic necrosis in orthopaedic practice, but its role in fracture healing is less well-defined. Previous studies have shown a relationship between fracture site activity (region A), activity in adjacent normal bone (region C) and time to union. The predictive value of the A/C ratio of the image obtained 300–800 s after injection was assessed in a prospective study of 50 patients with closed tibial fractures managed with plaster casts, external fixators and intramedullary nails. There were significant differences in absolute uptake and A/C ratio between the three groups (P<0.05), but this was not related to time to union. Reamed nailing alters the distribution of 99m-Tc-MDP uptake so as to reduce the A/C ratio (1.10+0.20), but there is a promising role for early phase bone scanning in non-operative (A/C=1.40+0.21) or externally fixed (A/C=1.26+0.22) fractures in conjunction with other non-invasive methods of monitoring the biomechanical environment.
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Wallace, A.L., Strachan, R.K., Blane, A. et al. Quantitative early phase scintigraphy in the prediction of healing of tibial fractures. Skeletal Radiol. 21, 241–245 (1992). https://doi.org/10.1007/BF00243065
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DOI: https://doi.org/10.1007/BF00243065