A new technique for diagnosis of acetabular cup loosening using computed tomography: preliminary experience in 10 patients.

Background And Purpose: Considerable migration of the acetabular cup is required for diagnosis of loosening by conventional radiography. We have developed a new clinically applicable method for assessment of cup loosening using computed tomography (CT).

Patients And Methods: 10 patients scheduled for revision hip replacement due to suspected wear or loosening were scanned twice with CT under torsion loading of the prosthesis.

A new approach for assessment of wear in metal-backed acetabular cups using computed tomography: a phantom study with retrievals.

Background And Purpose: Polyethylene wear is an important cause of aseptic loosening in hip arthroplasty. Detection of significant wear usually happens late on, since available diagnostic techniques are either not sensitive enough or too complicated and expensive for routine use. This study evaluates a new approach for measurement of linear wear of metal-backed acetabular cups using CT as the intended clinically feasible method.

A new CT method for measuring cup orientation after total hip arthroplasty: a study of 10 patients.

Background: It is difficult to assess the orientation of the acetabular component on routine radiographs. We present a method for determining the spatial orientation of the acetabular component after total hip arthroplasty (THA) using computed tomography.

Patients And Methods: Two CT-scans, 10 min apart, were obtained from each of 10 patients after THA.