Hip Impingement Syndrome, Prosthetic Complication
Conditions
Keywords
Iliopsoas Impingement, Overhanging Cup
Brief summary
The purpose of this study is to identify radiological factors on TC of the hip that could lead to prediction of development of symptomatic psoas impingement in patients with protruding acetabular cup after primary total hip arthroplasty.
Interventions
DIAGNOSTIC_TESTPelvis CT scan
Post-THA hip pelvis CT scan execution for pain, noise or THA planning for the controlateral hip, with identification of acetabular cup protrusion. Comparation of cases and controls to identify radiological factors that could potentially lead to symptomatic psoas impingement prediction.
Sponsors
Istituto Ortopedico Rizzoli
Study design
Observational model
CASE_CONTROL
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Primary total hip arthroplasty * Execution of a postoperative Ct scan for pain, noises or planning of the contralateral THA * 5 years minimum follow-up for the control group, tenotomy of the iliopsoas muscle in the cases group * Complete clinical and radiological data
Exclusion criteria
* Patient's refusal to participate * Non adequate Ct scans or made for periprosthetic fractures, component mobilization, periprosthetic infection or wearing of the prosthesis * Incomplete clinical and radiological data * Inadequate follow-up or regression of the iliopsoas impingement symptoms with non-operative treatment
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Acetabular Cup Inclination | at baseline (day 0) | The angle between the tangent to the cup opening and the interteardrop line in the frontal plane |
| Femoral Offset | at baseline (day 0) | The distance between the center of rotation and the femoral axis in the frontal plane |
| Acetabular Offset | at baseline (day 0) | The distance between the center of rotation and the Kohler line in the frontal plane |
| Eccentric Reaming | at baseline (day 0) | The distance between the native hip center of rotation and the acetabular cup center of rotation in the axial plane |
| Acetabular Cup Antiversion | at baseline (day 0) | The angle between the tangent to the cup opening and the tangent to the posterior ischial spines in the axial plane |
Countries
Italy
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| Cases Patients that have symptomatic psoas impingement in a protruding acetabular cup documented by a Pelvis CT scan | 35 |
| Controls Asymptomatic patients with a protruding acetabular cup documented by a Pelvis CT scan | 17 |
| Total | 52 |
Baseline characteristics
| Characteristic | Cases | Controls | Total |
|---|---|---|---|
| Age, Continuous | 53.5 years STANDARD_DEVIATION 11.8 | 54.1 years STANDARD_DEVIATION 15.3 | 53.7 years STANDARD_DEVIATION 12.9 |
| Cup protrusion Cup protrusion on frontal plane | 5.9 millimeters STANDARD_DEVIATION 4.8 | 7.6 millimeters STANDARD_DEVIATION 3.4 | 6.4 millimeters STANDARD_DEVIATION 4.5 |
| Cup protrusion Cup protrusion on sagital plane | 12.8 millimeters STANDARD_DEVIATION 5.6 | 14.9 millimeters STANDARD_DEVIATION 5.4 | 13.5 millimeters STANDARD_DEVIATION 5.6 |
| Race and Ethnicity Not Collected | — | — | 0 Participants |
| Sex: Female, Male Female | 20 Participants | 9 Participants | 29 Participants |
| Sex: Female, Male Male | 15 Participants | 8 Participants | 23 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk |
|---|---|---|
| deaths Total, all-cause mortality | 0 / 35 | 0 / 17 |
| other Total, other adverse events | 0 / 35 | 0 / 17 |
| serious Total, serious adverse events | 0 / 35 | 0 / 17 |
Outcome results
Primary
Acetabular Cup Antiversion
The angle between the tangent to the cup opening and the tangent to the posterior ischial spines in the axial plane
Time frame: at baseline (day 0)
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Cases | Acetabular Cup Antiversion | 19.8 degree | Standard Deviation 9.5 |
| Controls | Acetabular Cup Antiversion | 11.5 degree | Standard Deviation 9.4 |
Primary
Acetabular Cup Inclination
The angle between the tangent to the cup opening and the interteardrop line in the frontal plane
Time frame: at baseline (day 0)
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Cases | Acetabular Cup Inclination | 41.8 degree | Standard Deviation 6.9 |
| Controls | Acetabular Cup Inclination | 43.5 degree | Standard Deviation 5.8 |
Primary
Acetabular Offset
The distance between the center of rotation and the Kohler line in the frontal plane
Time frame: at baseline (day 0)
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Cases | Acetabular Offset | 32.0 millimeters | Standard Deviation 4.5 |
| Controls | Acetabular Offset | 33.8 millimeters | Standard Deviation 5.6 |
Primary
Eccentric Reaming
The distance between the native hip center of rotation and the acetabular cup center of rotation in the axial plane
Time frame: at baseline (day 0)
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Cases | Eccentric Reaming | 1.8 millimeters | Standard Deviation 4 |
| Controls | Eccentric Reaming | 0.8 millimeters | Standard Deviation 3.7 |
Primary
Femoral Offset
The distance between the center of rotation and the femoral axis in the frontal plane
Time frame: at baseline (day 0)
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Cases | Femoral Offset | 40.2 millimeters | Standard Deviation 5.8 |
| Controls | Femoral Offset | 38.4 millimeters | Standard Deviation 7.7 |