Detecting Acetabulum Movement After Total Hip Arthroplasty From Serial Plain Radiographs

• Conditions: Orthopedics

• Registration Number: NCT04779112
• Lead Sponsor: Taipei Medical University

Brief Summary

This study mainly measures the orientation of acetabulum cup post total hip arthroplasty. Using "Liaw's Version", a new and accurate standardization method, investigators are trying to analyze acetabulum cup anterversion change postoperatively.

Detailed Description

Patients undergoing total hip arthroplasty have generally good prognosis. However, clinically there was still a minority of patients who suffered from persistent postoperative pain. Dislocations of hip leading to revision surgeries were as well observed in some patients.

This study mainly measures the orientation of acetabulum cup post total hip arthroplasty. Using "Liaw's Version", a new and accurate standardization method, investigators are trying to analyze acetabulum cup anterversion change postoperatively.

As previously known, the anteversion of acetabulum cup determines the range of motion, stability, and the function after total hip arthroplasty. Cup malalignment increase impingement, dislocation, cup migration, and polyethylene wear. Finding a pattern may help the early diagnosis of acetabular loosening.

Study Timeline

• Study First Submitted: 2021-02-22
• Status Verified: 2021-03
• Study Start: 2021-03
• Study First Submitted QC: 2021-03-02
• Last Update Submitted: 2021-03-02
• Study First Posted: 2021-03-03
• Last Update Posted: 2021-03-03
• Primary Completion: 2022-01
• Study Completion: 2022-01

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 50

Inclusion Criteria

• Patients undergone total hip arthroplasty
• Patients undergone total hip arthroplasty with more than two postoperative X-ray plain films

Exclusion Criteria

• Patients with postoperative periprosthetic fracture(s)
• Patients with postoperative infection
• Patients undergone revision total hip arthroplasty

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Analyze acetabulum cup anterversion change postoperatively	1 week	Using "Liaw's Version", a new and accurate standardization method developed, investigators are trying to analyze acetabulum cup anterversion change postoperatively.