A Comparison of Large Diameter Metal Heads vs. Small Diameter Metal Heads vs/ Dual Mobility Total Hip Replacements


Rochester, Minn.

Trial status:

Open for Enrollment

Why is this study being done?

Does having a large diameter metal on polyethylene total hip replacement increase metal ion release. Larger metal heads are thought to have increased torsional forces on the trunion which would like release more metal ions. Increased metal ion levels have been associated with adverse local tissue reactions. Are there any differences comparing these groups to a dual mobility type total hip replacement.

Who is eligible to participate?

Inclusion Criteria: - One total hip replacement, either a large metal head (>40) or a small metal head (<30) on a polyethylene bearing surface. - 2 to 5 years s/p surgery minimum. No symptoms Exclusion Criteria: - Any other bearing surface besides metal on poly, no other joint replacements, symptomatic

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