Abstract text (incl. figure legends and references)
Different causes can lead to significant defect situations in the area of the hip joint. Extensive bony destruction is caused by infections, also in the case of in situ orthopedic implants, tumor diseases (including metastatic osseous changes), injuries or their consequences after fractures of the pelvis and complications of orthopedic joint implants in the area of the hip joints. In extensive acetabular defect situations, reconstruction is not always successful using available costly revision implants. In these cases, extensive defect zones with poor bone quality are found for placement or anchorage of standardized revision implants. After an exact analysis of the bony situation and taking into account the soft tissue situation, it is necessary in special cases to consider an implant adapted to the defect zone and to consider and plan an analysis with regard to such a restoration option.
Here, the possibilities of virtual, three-dimensional planning of operations are available. Computed tomography, 3D reconstruction and bone structure analysis are used to create a matrix that enables planning for an individually created patient implant. This is pre-discussed with the surgeon through planning steps, adjusted if necessary and transferred to production after approval. The costs for these implants, which are used in special cases, are very high and are discussed in advance with the responsible health insurance companies. The implantation of these prosthetic components, which are individually adapted to the defect situation, leads to the possibility of treating extensive bony defect situations in the area of the os ileum / acetabulum in the hip joint with a high benefit for the patient. Rapid mobilization with full weight-bearing is possible. However, these patient-specific special implants are reserved for exceptional cases of bony destruction.