Variations of the Exeter Hip Papers and drawings relating to variations of the Exeter hip design, including: engineering drawings of the Exeter spigotted femoral prosthesis, cement pressuriser and acetabular cups; correspondence from Howmedica regarding differences in the Ling-Lee prosthesis stem. Two academic reports on bone cement: 'Quantification of interdigitation at bone cement/cancellous bone interfaces in cemented femoral reconstructions' by S A Maher and B A O McCormack; 'Tensile strength of the cement-bone interface depends on the amount of bone interdigitated with PMMA cement' by K.A. Mann, D.C. Ayers, F.W. Werner, R.J. Nicoletta, M.D. Fortino. 1973-199