The hypothesis is that patients suffering a THA dislocation have a deviant 3-D cup orientation or pelvic tilt or both compared to patients with a stable THA.
ID
Source
Brief title
Condition
- Joint disorders
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
The difference in 3-D acetabular cup orientation and pelvic tilt between
patients with a stable or unstable total hip arthroplasty.
Secondary outcome
Does not apply.
Background summary
There are differences in the orientation of the acetabular cup after placement
of a total hip arthroplasty between patients. In addition, there are
differences in the amount of pelvic tilt between patients. Both are of
influence on relative component orientation of the total hip arthroplasty when
a patients changes its position, for example from the standing to the sitting
position. We think that these differences might be an important factor in
patients suffering from a THA dislocation, therefore we want examine these
factors between stable and unstable total hip arthroplasties.
Study objective
The hypothesis is that patients suffering a THA dislocation have a deviant 3-D
cup orientation or pelvic tilt or both compared to patients with a stable THA.
Study design
A matched case-control study.
Study burden and risks
Both groups of patients will receive 1 extra lateral radiograph in the sitting
position and a lateral radiograph in the standing position. The latter replaces
the standard cross-lateral radiograph. The risk of the extra radiation dose in
case and control subjects in this age category can be valued as low to very low
risk and can be considered as not harmful. There are no other known additional
risks involved in this study. There are no extra visits necessary for
particpating subjects.
Jagersingel 1
Zeist 3707 JA
NL
Jagersingel 1
Zeist 3707 JA
NL
Listed location countries
Age
Inclusion criteria
- >65yrs
- Subjects presenting or presented with an dislocation of a THA at the emergency department and will or were treated by closed reduction
- Primary THA with known surgical approach and implants for treatment of hip osteoarthritis
- Sufficient cognitive and language (Dutch) skills
- Signed informed consent prior to inclusion.
- Control patients between 1-5 year after primary THA without instability.
Exclusion criteria
- previous contralateral THA
- indications for the THA other than primary coxarthrosis
- revision THA, unknown approach or unknown implants
- subjects with a neurologic disability (cognitive, psychiatric or mental disease)
- insufficient language skills
- not providing written informed consent
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| CCMO | NL63363.041.17 |