GIF89aì>³™

INTRODUCTION

PELVIC BONE ANATOMY

CLASSIFICATION OF PELVIC RESECTIONS

SURGICAL OPTIONS FOR THE PERIACETABULAR RESECTION

Hemipelvectomy

Arthrodesis

Megaprosthesis

THE SADDLE PROSTHESIS

Historical Perspectives: The Mark I

Mark II Prosthesis

Periacetabular Reconstruction Prosthesis (PAR)

INDICATIONS

SURGICAL TECHNIQUES AND CONSIDERATIONS

The Notch Osteotomy

Soft Tissue Tension

NORMAL POSTOPERATIVE IMAGING

COMPLICATIONS AND IMAGING

Mark I

Mark II

PAR Page 1

PAR Page 2

RECOVERY AND FUNCTIONALITY

CONCLUSION

REFERENCES

Nieder et al.¹² found a 20% rate of deep infection in the 76 cases that he performed for failed arthroplasty (not tumors) with the Mark I model.

ª They saw upward migration in ALL cases although the migration soon stabilized and was referred to as 'bedding in'

ª Sclerosis at interface is common, and that if no sclerosis is noted then there is usually greater migration

ª Deep infection caused significant migration

ª Heterotopic bone around prosthesis is common and may or may not be of clinical significance^1,3,6,11

Cephalad Migration

Notice the cephalad migration and heterotopic bone formation over a 4-year period in this patient¹²

Same patient as above. Close-up view¹².

Another example of migration with the Mark I model over the course of a few years¹².

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