The occurrence of pseudotumours following metal-on-metal hip resurfacing arthroplasty (MoMHRA) has been associated with high serum metal ion levels and consequently higher than normal bearing wear. Measuring ground reaction force is a simple method of collecting information on joint loading during a sit-to-stand (STS). We investigated vertical ground reaction force (VGRF) asymmetry during sit-to-stand for 12 MoMHRA patients with known serum metal ion levels. Asymmetry was assessed using two methods: a ratio of VGRF for implanted/unimplanted side and an absolute symmetry index (ASI). It was found that subjects with high serum metal ion levels preferentially loaded their implanted sides. The difference between the two groups was most apparent during the first 22% of STS. VGRF ratio showed significant and strong correlation with serum metal ion levels (Spearman's rho = 0.8, p = 0.003). These results suggest that individual activity patterns play a role in the wear of MoMHRA and preferential loading of an implanted limb during the initiation of motion may increase the wear of metal-on-metal hip replacements.
LangtonDJJamesonSSJoyceTJHallabNJNatuSNargolAVEarly failure of metal-on-metal bearings in hip resurfacing and large-diameter total hip replacement. J Bone Joint Surg Br201092138–46
2.
WillertHGBuchhornGHDiplIMetal-on-metal bearings and hypersensitivity in patients with artificial hip joints. A clinical and histomorphological studyJ Bone Joint Surg Am200587128–36
3.
SchmalzriedTPMetal-metal bearing surfaces in hip arthroplasty. Orthopedics2009329661–3
4.
PanditHGlyn-JonesSMcLardy-SmithPPseudotumours associated with metal-on-metal hip resurfacings. J Bone Joint Surg Br2008907847–51
5.
MurrayDWGrammatopoulosGGundleRHip resurfacing and pseudotumour. Hip Int2011213279–83
6.
CampbellPBeauléPEEbramzadehEThe John Charnley Award: a study of implant failure in metal-on-metal surface arthroplasties. Clin Orthop Relat Res200645335–46
7.
De SmetKDe HaanRCalistriAMetal ion measurement as a diagnostic tool to identify problems with metal-on-metal hip resurfacing. J Bone Joint Surg Am200890Suppl 4202–8
8.
De HaanRPattynCGillHSMurrayDWCampbellPADe SmetKCorrelation between inclination of the acetabular component and metal ion levels in metal-on-metal hip resurfacing replacement. J Bone Joint Surg Br200890101291–7
9.
BergmannGDeuretzbacherGHellerMHip contact forces and gait patterns from routine activities. J Biomech2001347859–71
10.
LugadeVWuAJewettBCollisDChouLSGait asymmetry following an anterior and anterolateral approach to total hip arthroplasty. Clin Biomech (Bristol, Avon)2010257675–80
11.
TalisVLGrishinAASolopovaIAOskanyanTLBelenkyVEIvanenkoYPAsymmetric leg loading during sit-to-stand, walking and quiet standing in patients after unilateral total hip replacement surgery. Clin Biomech (Bristol, Avon)2008234424–33
12.
StaufferRNSmidtGLWadsworthJBClinical and biomechanical analysis of gait following Charnley total hip replacement. Clin Orthop Relat Res19749970–7
13.
McCroryJLWhiteSCLifesoRMVertical ground reaction forces: objective measures of gait following hip arthroplasty. Gait Posture2001142104–9
14.
QueenRMWattersTSAbbeyANSabesanVJVailTPBolognesiMPGait symmetry: a comparison of hip resurfacing and jumbo head total hip arthroplasty patients. J Arthroplasty2011265680–5
15.
MiznerRLSnyder-MacklerLAltered loading during walking and sit-to-stand is affected by quadriceps weakness after total knee arthroplasty. J Orthop Res20052351083–90
16.
BoonstraMCSchreursBWVerdonschotNThe sit-to-stand movement: differences in performance between patients after primary total hip arthroplasty and revision total hip arthroplasty with acetabular bone impaction grafting. Phys Ther2011914547–54
17.
MacDonaldSJBrodnerWJacobsJJA consensus paper on metal ions in metal-on-metal hip arthroplasties. J Arthroplasty2004198Suppl 312–6
18.
Van Der StraetenCDGrammatopoulosGGillHSInterpretation of metal ions in unilateral and bilateral hip resurfacings. EORS; Vienna, Austria:2011
19.
RoyGNadeauSGravelDMalouinFMcFadyenBJPiotteFThe effect of foot position and chair height on the asymmetry of vertical forces during sit-to-stand and stand-to-sit tasks in individuals with hemiparesis. Clin Biomech (Bristol, Avon)2006216585–93
20.
MoureyFGrishinAd'AthisPPozzoTStapleyPStanding up from a chair as a dynamic equilibrium task: a comparison between young and elderly subjects. J Gerontol A Biol Sci Med Sci2000559B425–31
21.
GiakasGBaltzopoulosVTime and frequency domain analysis of ground reaction forces during walking: an investigation of variability and symmetry. Gait Posture199753189–97
22.
WhiteRAgourisISelbieRDKirkpatrickMThe variability of force platform data in normal and cerebral palsy gait. Clin Biomech (Bristol, Avon)1999143185–92
23.
HerzogWNiggBMReadLJOlssonEAsymmetries in ground reaction force patterns in normal human gait. Medicine and Science in Sports and Exercise1989211110–14
24.
StacoffADieziCLuderGStüssiEKramers-de QuervainIAGround reaction forces on stairs: effects of stair inclination and age. Gait Posture200521124–38
25.
MorlockMSchneiderEBluhmADuration and frequency of every day activities in total hip patients. J Biomech2001347873–81
26.
de GrootIBBussmannHJStamHJVerhaarJASmall increase of actual physical activity 6 months after total hip or knee arthroplasty. Clin Orthop Relat Res200846692201–8
27.
RoterGEMedleyJBBobynJDKrygierJJChanFWStop-dwell-start motion: a novel simulator protocol for the wear of metal-on-metal hip implants. In: Tribology Series (40)DowsonD ed. Elsevier2002367–76
28.
BurnettDRCampbell-KyureghyanNHCerritoPBQuesadaPMSymmetry of ground reaction forces and muscle activity in asymptomatic subjects during walking, sit-to-stand, and stand-to-sit tasks. J Electromyogr Kinesiol2011214610–5
29.
JanssenWGBussmannHBStamHJDeterminants of the sit-to-stand movement: a review. Phys Ther2002829866–79
