Nonpathologic 1-2 mm lucency is commonly seen in Zone 1 of both acetabular and femoral components. Less commonly seen in Zone 7.




DeLee, J. G. and J. Charnley (1976). “Radiological demarcation of cemented sockets in total hip replacement.” Clin Orthop Relat Res(121): 20-32.

Gruen, T. A., et al. (1979). “”Modes of failure” of cemented stem-type femoral components: a radiographic analysis of loosening.” Clin Orthop Relat Res(141): 17-27.