The edition · Orthopaedics
Locking plates beat tension-band wiring for displaced patellar fractures
A blinded Danish trial meets its superiority bar on patient-reported knee function; robotic UKA improves early recovery but not two-year scores; linked records find a third of arthroplasty VTE outside hospital data; and Cochrane finds the fracture evidence in men remarkably thin.
The edition in brief
A patient- and assessor-blinded multicentre trial randomised 122 adults with displaced patellar fractures to locking plate fixation or tension-band wiring. At 12 months, plating improved three KOOS sub-scales by clinically meaningful margins — symptoms 10.4 points, sport and recreation 14.1, quality of life 10.9 — and hardware removal, fixation failure and reoperation were more common after wiring. An interim report of 107 patients randomised to robotic arm-assisted or jig-based medial unicompartmental knee arthroplasty found more accurate component positioning, less inpatient pain and opioid use and shorter stay with the robot, and a better Forgotten Joint Score, but no difference in Oxford, KOOS or WOMAC scores at two years. Linked UK primary and hospital data on 476,620 knee, hip and shoulder arthroplasties found six-month VTE of 1.5%, with over 30% of events visible only in the linked data; rates fell over time, but NICE guideline changes were not associated with a step change for hips and knees. A Cochrane review of 17 trials in men aged 50 and over was very uncertain whether bisphosphonates, anabolic agents, denosumab or romosozumab reduce fractures, because trials were small, short and had few events.
Robotic UKA improved early recovery but not two-year function scores
Offer robotic UKA for smoother early recovery where available, but do not present it as giving better medium-term function.
A third of VTE after arthroplasty appears only in primary care records
Give arthroplasty patients and their GP clear VTE warning signs and prophylaxis duration at discharge; many clots present in primary care.
Cochrane: the fracture-prevention evidence in men is very uncertain
Treat men with fragility fractures as current guidelines advise, but be honest that fracture benefit in men is largely extrapolated from trials in women.
Check the extensor mechanism before counting fragments
Test straight-leg raise after aspiration and local anaesthetic before deciding on patellar fixation.
Locking plate fixation gave better knee function than tension-band wiring for patellar fractures
For displaced patellar fractures needing surgery, prefer locking plate fixation over tension-band wiring where implants are available.
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