Imaging findings in hip replacement. How can I help the surgeon?

Congress:

ECR 2020

Poster Number:

C-08100

Type:

Educational Exhibit

Keywords:

Diagnostic procedure, Complications, Digital radiography, CT, Conventional radiography, Musculoskeletal joint, Extremities, Musculoskeletal, Prostheses, Not applicable, Performed at one institution

Authors:

F. J. Azpeitia Armán, R. M. Lorente Ramos, C. Oliva Fonte, N. A. Abbas Khoja, O. R. Marín Peña, F. Fernández Alarza; MADRID/ES

DOI:

10.26044/ecr2020/C-08100

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-08100

Fig. 1: Types of hip replacement

Fig. 6: Radiographic analysis of a hip arthroplasty: 2.- Horizontal center of rotation...

Fig. 12: Computed tomography

Fig. 25: Brooker classification of Heterotopic bone formation

Table 9

Learning objectives

-To review the different types of hip replacement. -To illustrateimagingfindings in different techniques in the evaluation of prostheses. - To describe usefulness and limitations of plain radiographs and CT in the evaluation of hip replacements. -To present normal postoperative imaging findings and signs of complications.

Background

We review current concepts inradiological imaging of hip replacement. The surgeon clinical needs are analyzed trying to clarify the most important imaging findings and parameters which should be stated in our report as well as usefulness and limitations of the most commonly employed imaging techniques.

Findings and procedure details

Types of hip replacement ( Fig. 1 ): Hip arthroplasties can be classified into two major types: hemiarthroplasty and total hip arthroplasty. Further subcategorization of hip arthroplasties is based on the identification ofthe materialemployed in the bearing surface of the acetabulum and the femoral head. The ‘hard’ bearing surfaces consist of an alloy of metal or ceramic, the ‘soft’ bearing surfaces consist of polyethylene Fixating techniques Bone cement comprises a mixture of an acrylic cement and additives, including Barium (or Zirconium) to render it radio-opaque....

Conclusion

•Most complications associated with total hip arthroplasty (THA) are infrequent and can be prevented if anticipated or treated readily when recognized. •Short-term failures of hip replacements are most commonly the result of instability and dislocation. •Osteolysis caused by granulomatous reaction to particulate wear debris leads to many long-term failures.

Personal information and conflict of interest

F. J. Azpeitia Armán1 R. M. Lorente Ramos1 N. A. Abbas Khoja1 C. Oliva Fonte1 O. R. Marín Peña2 F. Fernández Alarza1 1.- Unidad Central de Radiodiagnóstico de la CAM (UCR): Hospital UniversitarioInfanta Leonor 2.-OrthopedicSurgeryandTraumatologyDepartment. Hospital UniversitarioInfanta Leonor The authors have no relevant disclosures

References

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