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ISRN Orthop. 2013 Jan 10;2013:629201. doi: 10.1155/2013/629201. eCollection 2013.

Trilogy-constrained acetabular component for recurrent dislocation.

ISRN orthopedics

Annette Vest Andersen, Anne Grete Kjersgaard, Søren Solgaard

Affiliations

  1. Department of Orthopedic Surgery, Gentofte Hospital, Niels Andersens Vej 65, 2900 Hellerup, Denmark.

PMID: 24967111 PMCID: PMC4045345 DOI: 10.1155/2013/629201

Abstract

32 patients received a Trilogy- or Trilogy-Longevity-constrained acetabular liner for recurrent dislocations after total hip replacement. The constrained liner was inserted into a well-fixed Trilogy acetabular shell with snap fit. At 1.8-year followup (range 3-63 months), 4 patients had suffered further dislocation(s) (12%), and one patient had revision surgery for a loosened acetabular shell. Radiologic evaluation detected no definitively loose components, but one patient with progressing radiolucent lines around the femoral component and one patient with an acetabular cyst were found, as well as a patient with a loose locking ring (but otherwise no failure). The nineteen patients who were available for the present followup had a mean Harris Hip Score of 81. The constrained liner is an effective method of dealing with recurrent dislocations in well-fixed components.

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