Correlation of Spinopelvic Parameters and Acetabular Cup Orientation

Completed

Conditions studied: Hip Osteoarthritis, Complications; Arthroplasty

In brief

In total hip arthroplasty, cup anteversion is an important factor in stability. Lewinnek's safe zone and functional anteversion are often used to assess appropriate orientation. However, these approaches do not consider the effect of the spinopelvic chain and lumbar mobility when in the seated position. This study will measure functional anteversion when standing and sitting with patient-specific computer models and define a quantitative relationship between the change in functional anteversion and spinopelvic parameters. This will challenge the historical paradigm of the safe zone and provide a tool to define anteversion based on a patient's mechanics and reduce risk of dislocation.

Key facts

Study ID

NCT02598700

Run by

Duke University

People needed

37

Starts

2016-02-01

Expected to finish

2018-10-01

Last updated by the study team

2019-06-07

Who can join

Age: any. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• All patients who have undergone THA with the appropriate pre-operative CT for planning and those who are candidates for primary THA for osteoarthritis will be contacted for recruitment.

You may not qualify if…

• inflammatory arthritis
• neuromuscular disorders
• revision surgery

Where it is running

• Duke Medical Plaza Page Road — Durham, North Carolina, United States

Full record on ClinicalTrials.gov

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