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

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT02049892

Enrollment

Registered

2014-01-30

Start date

2013-12-01

Completion date

2016-02-01

Last updated

2017-12-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Total Hip Replacement

Keywords

Total Hip Replacement, Metal Ion, 2-5 years after surgery, Asymptomatic

Brief summary

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.

Interventions

OTHERMetal Ion Levels

Study design

Observational model

COHORT

Time perspective

CROSS_SECTIONAL

Eligibility

Sex/Gender

ALL

Age

18 Years to 100 Years

Healthy volunteers

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

Design outcomes

Primary

Measure	Time frame	Description
Metal Ion levels	2 years	We would like to determine a difference in metal ion levels on metal on polyethylene total hip replacement

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026