Omnifit Acetabular Component: A Solution to Preventing and Treating Dislocation

Abstract

Purpose.

To assess short- to medium-term outcome of the Omnifit constrained acetabular component in preventing dislocation in at-risk patients after total hip arthroplasty (THA).

Methods.

81 patients (mean age, 77 years) underwent either primary or revision THA with an Omnifit constrained acetabular component and were followed up clinically and radiologically for a mean period of 24 months.

Results.

There was one dislocation and one revision for avulsion of the acetabulum. The remaining prostheses remained well fixed.

Conclusions.

In the short- to medium-term, the Omnifit constrained acetabular component is effective in preventing primary and recurrent dislocation in at-risk patients. Long-term follow-up is needed to assess whether good fixation is maintained. The Omnifit acetabular cup is recommended for elderly patients with limited life expectancy and functional demands.

Keywords

arthroplasty,replacement,hip hip dislocation

References

Woo

Morrey

. Dislocations after total hip arthroplasty. J Bone Joint Surg Am 1982;64:1295–306.

Fackler

Poss

. Dislocation in total hip arthroplasties. Clin Orthop Relat Res 1980;151:169–78.

Paterno

Lachiewicz

Kelley

. The influence of patient-related factors and the position of the acetabular component on the rate of dislocation after total hip replacement. J Bone Joint Surg Am 1997;79:1202–10.

Ekelund

Rydell

Nilsson

. Total hip arthroplasty in patients 80 years of age and older. Clin Orthop Relat Res 1992;281:101–6.

Turner

. Postoperative total hip prosthetic femoral head dislocations. Incidence, etiologic factors, and management. Clin Orthop Relat Res 1994;301:196–204.

Robinson

Jr Salvati

. Comparison of the transtrochanteric and posterior approaches for total hip replacement. Clin Orthop Relat Res 1980;147:143–7.

Fender

Harper

Gregg

. Outcome of Charnley total hip replacement across a single health region in England: The results at five years from a regional hip register. J Bone Joint Surg Br 1999;81:577–81.

Ritter

. Dislocation and subluxation of the total hip replacement. Clin Orthop Relat Res 1976;121:92–4.

Eftekhar

. Dislocation and instability complicating low friction arthroplasty of the hip joint. Clin Orthop Relat Res 1976;121:120–5.

10.

Charnley

. The long-term results of low-friction arthroplasty of the hip performed as a primary intervention. J Bone Joint Surg Br 1972;54:61–76.

11.

Woolson

Rahimtoola

. Risk factors for dislocation during the first 3 months after primary total hip replacement. J Arthroplasty 1999;14:662–8.

12.

Newington

Bannister

Fordyce

. Primary total hip replacement in patients over 80 years of age. J Bone Joint Surg Br 1990;72:450–2.

13.

Earll

Fehring

Griffin

Mason

McCoy

Odum

. Success rate of modular component exchange for the treatment of an unstable total hip arthroplasty. J Arthroplasty 2002;17:864–9.

14.

Tompkins

Jacobs

Kull

Rosenberg

Galante

. Primary total hip arthroplasty with a porous-coated acetabular component. Seven-to-ten-year results. J Bone Joint Surg Am 1997;79:169–76.

15.

Engh

Bobyn

Glassman

. Porous-coated hip replacement. The factors governing bone ingrowth, stress shielding, and clinical results. J Bone Joint Surg Br 1987;69:45–55.

16.

Harris

McCarthy

Jr O'Neill

. Femoral component loosening using contemporary techniques of femoral cement fixation. J Bone Joint Surg Am 1982;64:1063–7.

17.

Goetz

Capello

Callaghan

Brown

Johnston

. Salvage of total hip instability with a constrained acetabular component. Clin Orthop Relat Res 1998;355:171–81.

18.

Shapiro

Weiland

Markel

Padgett

Sculco

Pellicci

. The use of a constrained acetabular component for recurrent dislocation. J Arthroplasty 2003;18:250–8.

19.

Anderson

Murray

Skinner

. Constrained acetabular components. J Arthroplasty 1994;9:17–23.