No fixation strategy wins outright in the distal tibia — but malunion separates them

Design

Systematic review and network meta-analysis of 11 randomised trials and 18 cohort studies, INPLASY2025120055

Population

2,145 patients with distal tibial fractures across five fixation strategies

Primary outcome

Operative time, time to union, malunion, delayed union/nonunion and infection

Effect

Malunion: MIPO versus EF+LORIF RR 3.26 (95% CI 1.08-9.80), MIPO versus suprapatellar nailing RR 4.03 (1.30-12.48), ORIF versus MIPO RR 0.30 (0.11-0.82). No significant difference in delayed union or nonunion

Distal tibial fractures are fixed five different ways depending on who is operating: open reduction and internal fixation, minimally invasive plate osteosynthesis, external fixation with limited open reduction, intramedullary nailing by infrapatellar or suprapatellar entry, and retrograde tibial nailing. This network meta-analysis searched four databases to March 2026 and pooled 11 randomised trials and 18 cohort studies — 2,145 patients.

The headline is a null one: no strategy was consistently superior, and delayed union and nonunion did not differ significantly between techniques. Where they did separate was malunion. MIPO carried higher malunion risk than external fixation with limited open reduction (RR 3.26, 95% CI 1.08-9.80) and than suprapatellar nailing (RR 4.03, 95% CI 1.30-12.48), and ORIF carried lower risk than MIPO (RR 0.30, 95% CI 0.11-0.82). ORIF, EF with limited ORIF and suprapatellar nailing all had lower malunion risk than infrapatellar nailing. MIPO also had a longer operative time (MD 8.23 minutes, 95% CI 0.44-16.01) and a longer time to union than infrapatellar nailing (MD 1.02, 95% CI 0.10-1.93).

Infection ran the other way: higher with ORIF and MIPO than with external fixation and nailing-based strategies, though the authors flag several of these comparisons as uncertain.

So the choice is a trade, and this quantifies the two sides of it: the plating approaches buy alignment control at some infection cost, and MIPO specifically does not appear to deliver the alignment advantage its proponents claim.

• Discuss the malunion-versus-infection trade explicitly when planning, rather than defaulting to unit habit
• Suprapatellar entry outperformed infrapatellar entry on malunion — worth checking your default
• Union rates did not differ; do not choose on the expectation that one technique heals faster
• Soft tissue condition still decides many of these cases, and this analysis cannot capture that
• Most included studies were cohorts, not trials — treat the estimates as indicative

Why it matters

It gives numbers to a choice most surgeons currently make on training and habit.

Don't overread it

Eighteen of 29 included studies were cohorts, so allocation to technique reflected surgeon judgement and fracture pattern, not randomisation.

The statistics, in plain English

Network meta-analysis compares techniques that were often never compared head to head, by connecting them through shared comparators. That makes the confidence intervals wide — a malunion risk ratio of 4.03 with an interval from 1.30 to 12.48 is compatible with a modest difference or an enormous one. The operative time difference of 8.23 minutes is statistically significant and clinically trivial. And a non-significant result for nonunion in 2,145 patients is not proof of equivalence.

Read the rest in the app

You have read your two free briefings this month. The app carries all 27 specialties, every morning, free — and this finding is waiting in it.

Get Daily Doctor — free

Scan to keep reading on your phone. No account needed to start.