Functional outcome after successful internal fixation versus salvage arthroplasty of patients with a femoral neck fracture

J Orthop Trauma. 2014 Dec;28(12):e273-80. doi: 10.1097/BOT.0000000000000123.

Abstract

Objectives: To determine patient independency, health-related and disease-specific quality of life (QOL), gait pattern, and muscle strength in patients after salvage arthroplasty for failed internal fixation of a femoral neck fracture.

Design: Secondary cohort study to a randomized controlled trial.

Setting: Multicenter trial in the Netherlands, including 14 academic and nonacademic hospitals.

Patients: Patients after salvage arthroplasty for failed internal fixation of a femoral neck fracture were studied. A comparison was made with patients who healed uneventfully after internal fixation.

Intervention: None (observatory study).

Main outcome measurements: Patient characteristics, SF-12, and Western Ontario McMaster osteoarthritis index scores were collected. Gait parameters were measured using plantar pressure measurement. Maximum isometric forces of the hip muscles were measured using a handheld dynamometer. Differences between the fractured and contralateral leg were calculated. Groups were compared using univariate analysis.

Results: Of 248 internal fixation patients (median age, 72 years), salvage arthroplasty was performed in 68 patients (27%). Salvage arthroplasty patients had a significantly lower Western Ontario McMaster osteoarthritis index score (median, 73 vs. 90; P = 0.016) than patients who healed uneventfully after internal fixation. Health-related QOL (SF-12) and patient independency did not differ significantly between the groups. Gait analysis showed a significantly impaired progression of the center of pressure in the salvage surgery patients (median ratio, -8.9 vs. 0.4, P = 0.013) and a significant greater loss of abduction strength (median, -25.4 vs. -20.4 N, P = 0.025).

Conclusions: Despite a similar level of dependency and QOL, salvage arthroplasty patients have inferior functional outcome than patients who heal after internal fixation of a femoral neck fracture.

Level of evidence: Therapeutic level III.

Publication types

  • Randomized Controlled Trial
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Arthroplasty, Replacement, Hip
  • Cohort Studies
  • Femoral Neck Fractures / physiopathology
  • Femoral Neck Fractures / surgery*
  • Fracture Fixation, Internal / adverse effects
  • Gait
  • Humans
  • Leg Length Inequality
  • Middle Aged
  • Muscle Strength
  • Quality of Life
  • Recovery of Function
  • Reoperation
  • Salvage Therapy
  • Treatment Outcome