Bone necrosis and remodelling after plate application. A) Application of a plate causes regional avascular necrosis under the implant. B) Within 3 months, bone metabolizing units advancing from the intact surrounding bone will remove the necrotic bone (initial porosis) and replace it with new lamellar osteons. Reproduced from Müller, M., Allgöwer, M., Schneider, R., et al. (1991). Basic aspects of internal fixation. In: Allgöwer, M. (ed), Manual of Internal Fixation. Techniques Recommended by the AO-ASIF group, 3rd edition, pp. 1–158. Berlin: Springer-Verlag.