Distinguishing Acetabulum Cup Retroversion From Anteversion on Anteroposterior Radiographs After Total Hip Arthroplasty

Orthopedics Clinical Trial

Official title:

Distinguishing Acetabulum Cup Retroversion From Anteversion on Anteroposterior Radiographs After Total Hip Arthroplasty

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT04780100
• Other study ID #: N202005040
• Status: Not yet recruiting
• Start date: March 2021
• Est. completion date: May 2021

Study information

• Verified date: July 2020
• Source: Taipei Medical University
• Contact: Chen-Kun Liaw
• Phone: +886963969162
• Email: chenkunliaw[@]tmu.edu.tw
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

In this study, investigators will demonstrate and prove a ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.

Description:

Total hip arthroplasty (THA) is considered to be the best and most reliable treatment of end-stage hip disorders with satisfactory long-term clinical outcomes. However,the incidence of postoperative dislocation ranges from 0.3% to 3% in primary THA. The most important risk factor is malpositioning of implant components. Generally, excessive anteversion and retroversion increase risk of anterior and posterior hip dislocation respectively. Several radiological methods have been proposed to measure anteversion of the acetabular cup on plain radiographs, but most of these methods cannot accurately distinguish cup retroversion from anteversion. In this study, investigators will demonstrate and prove a ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 20
• Est. completion date: May 2021
• Est. primary completion date: May 2021
• Gender: All
• Age group: 30 Years to 90 Years

Eligibility

Inclusion Criteria:

• Patients undergone total hip arthroplasty

• Patients undergone total hip arthroplasty with more than two postoperative anteroposterior radiographs of pelvis

• Patients undergone total hip arthroplasty with postoperative pelvic CT

Exclusion Criteria:

• Patients with congenital pelvis abnormality or pelvic fracture history

• Patients with postoperative periprosthetic fracture(s)

• Patients with postoperative infection or implants loosening

• Patients undergone total hip arthroplasty without more than two postoperative anteroposterior radiographs of pelvis

• Patients undergone total hip arthroplasty without postoperative pelvic CT

Related Conditions & MeSH terms

• Orthopedics

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Taipei Medical University

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	A computerized ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.	Total hip arthroplasty (THA) is considered to be the best and most reliable treatment of end-stage hip disorders with satisfactory long-term clinical outcomes. However,the incidence of postoperative dislocation ranges from 0.3% to 3% in primary THA. The most important risk factor is malpositioning of implant components. Generally, excessive anteversion and retroversion increase risk of anterior and posterior hip dislocation respectively. Several radiological methods have been proposed to measure anteversion of the acetabular cup on plain radiographs, but most of these methods cannot accurately distinguish cup retroversion from anteversion. In this article, we will demonstrate and prove a computerized ellipse method (Liaw's version) for measurement and detection of acetabulum cup retroversion.	10 days