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  • Title: Instability after total hip arthroplasty: treatment with large femoral heads vs constrained liners.
    Author: Sikes CV, Lai LP, Schreiber M, Mont MA, Jinnah RH, Seyler TM.
    Journal: J Arthroplasty; 2008 Oct; 23(7 Suppl):59-63. PubMed ID: 18922375.
    Abstract:
    One of the most common complications after total hip arthroplasty is instability. This study reviewed the recent literature concerning the indications, contraindications, and results of recent studies using both constrained liners and large femoral heads to treat instability after total hip arthroplasty. We also report on the results of a series of 41 patients (52 hips) considered being at high risk for dislocation who were treated with large-diameter metal-on-metal bearings and who were compared with a matched group of hips treated with standard-size metal-on-polyethylene bearings. The large-diameter femoral head group had no dislocations at a minimum follow-up of 24 months, whereas the standard-size group had 2 dislocations. We support the use of large femoral heads to treat instability in a wide variety of patients because of the increased stability, decreased wear of modern metal-on-metal designs, increased range of motion, and variety of revision options.
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