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Fixation of periprosthetic or osteoporotic distal femoral fractures with locking plates: a pilot randomised controlled trial.

Abstract：

INTRODUCTION:We hypothesised that the use of a polyaxial locking plate design offers the same clinical benefits as a monoaxial locking plate system following distal femoral osteoporotic/periprosthetic fracture fixation. METHOD:A multicentre prospective randomised pilot trial was conducted. Inclusion criteria were patients over 60 years with a displaced osteoporotic or periprosthetic distal femoral fracture. Details documented included time to union, complications, reinterventions and functional outcomes according to the Oxford knee score and EuroQol EQ-5D. Analysis of factors influencing an early fracture healing response was performed between those with clear features of radiological callus formation at three months. Statistical analysis was performed using a logistic regression model with multiple covariates assessed for each plate system (1:1 ratio) over a follow-up period of one year. RESULTS:Forty patients (34 females) with a mean age of 77 (60-99) were recruited. Four patients deceased within the first six months. Twenty-five patients united by the six month follow-up. Six more patients progressed to union between six and nine months. Five patients developed non-union (two patients had implant failure; one in each group) and all underwent revision surgery. Malunion was evident in two cases, one with 15° of valgus (monoaxial plate), and one with 12° of recurvatum (polyaxial plate). Between the two plate systems, statistical analysis revealed no significant differences in most of the recorded parameters. Radiological features of early bone healing were present when the surgical approach was smaller (p = 0.015), and when a greater working length of the bridging plate was present (p = 0.016). CONCLUSION:Both plate systems demonstrated good union rates and limited implant related complications. Good reduction, mechanically sound construct and respect of the local fracture biology was more important than the particular plate design characteristics.

journal_name

Int Orthop

journal_title

International orthopaedics

authors

Kanakaris NK,Obakponovwe O,Krkovic M,Costa ML,Shaw D,Mohanty KR,West RM,Giannoudis PV

doi

10.1007/s00264-018-4061-1

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

1193-1204

issue

eissn

0341-2695

issn

1432-5195

pii

10.1007/s00264-018-4061-1

journal_volume

pub_type

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Fixation of periprosthetic or osteoporotic distal femoral fractures with locking plates: a pilot randomised controlled trial.