Implant migration after early weightbearing in cementless hip replacement

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Bottner, F (author)

Zawadsky, M (author)

Su, EP (author)

Bostrom, M (author)

Palm, Lars (author): Östergötlands Läns Landsting,Linköpings universitet,Hälsouniversitetet,Ortopedi och idrottsmedicin,Ortopedkliniken Linköping

Ryd, Leif (author): Linköpings universitet,Hälsouniversitetet,Ortopedi och idrottsmedicin

Sculco, TP (author)

(creator_code:org_t)

2005
2005
English.
In: Clinical Orthopaedics and Related Research. - 0009-921X .- 1528-1132. ; :436, s. 132-137

Abstract Subject headings

Twenty-nine patients (five women and 24 men) with an average age of 47 years (range, 24-59 years) had 37 total hip arthroplasties using a hydroxyapatite-coated double-wedge press-fit femoral component. All patients had a Type A bone quality. Patients were either mobilized with weightbearing as tolerated or toe-touch weightbearing for 6 weeks postoperatively. After 6 weeks all patients were advanced to weightbearing as tolerated. Radiostereometric analysis radiographs were taken at 3 days, 6 weeks, and 6 months postoperatively to measure migration of the femoral component. Radiostereometric analysis revealed no difference in stem migration between the two groups as defined by maximal total point migration. There was a difference in the vertical (proximal-distal) migration within the first 6 weeks between groups (0.81 mm versus 0.13 mm), but not afterwards (0.17 mm versus 0.18 mm). Continuous migration after 6 weeks was observed in three patients from each group. There was no loosening in either group within a 2-year followup. Weightbearing as tolerated is recommended for young patients with excellent bone quality after cementless total hip arthroplasty with a double-wedge press-fit femoral component. Level of Evidence: Diagnostic study, Level I (testing of previously developed diagnostic criteria in series of consecutive patients-with previously applied reference gold standard). See the Guidelines for Authors for a complete description of levels of evidence.

By the author/editor: Bottner, F; Zawadsky, M; Su, EP; Bostrom, M; Palm, Lars; Ryd, Leif; show more...; Sculco, TP; show less...

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