Role of Trabecular Metal Augments in Revision Total Hip Arthroplasty with Acetabular Bone Defects

Abstract

Background: Annually, a growing number of total hip arthroplasties (THA) are being conducted, and a comparable upward trend has  been noted in revision hip procedures.
Objective: The objective of this research endeavour is to assess the initial functional and radiological results in patients who are  undergoing revision THA and have acetabular defects; trabecular metal augments (TMA) are utilised for acetabular reconstruction.
Patients and Methods: A prospective cohort study was conducted on 40 patients undergoing rTHA with loose acetabular component  with acetabular defects. The study was done in the period between April 2021 and December 2022 in Benha University Hospital, including forty patients undergoing revision total hip arthroplasty with acetabular defects that necessitate reconstruction. All the patients were  followed up for one year. All patients were evaluated with anteroposterior and cross table lateral plain X-ray, immediately postoperatively then at two, six, twelve weeks, six months then annually. Functional outcomes were measured with Oxford Hip Score (OHS).
Results: There was no significant difference between Paprosky II and Paprosky III as regard OHS improvement. 2(5%) of patients had fair  OHS grade, 16(40%) had good OHS grade, 22(55%) had excellent OHS grade.
Conclusions: The promising early results of using THA for acetabular reconstruction convinced more surgeons to start using this system  in revision surgeries.