Alignment & Stability in Revision Planning

→ Before any revision surgery, check if the whole leg is straight (alignment) and if the ankle is stable (no wobble). A perfectly repaired cartilage patch in a crooked or wobbly joint will fail again. This is not a side issue — it's a prerequisite.

Why This Needs Its Own Section

Recent work recommends that whole-leg malalignment and talar tilt should be part of OLT surgical planning, not just a footnote [157].

2025 Evidence

• A 2025 study found that concomitant chronic lateral ankle instability (CLAI) lowered postoperative function in OLT patients [157]
• Cartilage repair outcomes were not clearly harmed once stability was restored — but the instability itself depressed function scores
• Whole-leg alignment assessment (not just ankle-level) is now recommended in revision planning

What This Means for Revision Cases

• In a revision ankle with a sprain history, alignment and stability are not optional checks
• Joint-space narrowing at Van Dijk stage ≥2 and defects on the opposing tibial surface are contraindications for newer focal resurfacing [155]
• The key question before revision surgery is not "which procedure?" but "is the joint still reconstructible?" — meaning preserved joint space, no moderate/severe OA, no talar collapse, and no major tibial-side damage

Clinical pearl: Alignment correction can sometimes restore OLT spontaneously: in one study, cyst volume decreased from 0.2592 to 0.0873 cm³ after realignment alone [134].

2026: Two Reasons Weight-Bearing Imaging Earns Its Place

→ Weight-bearing imaging is already on the list of unfinished diagnostic work. Two July 2026 studies give concrete answers to “what would it actually tell us that a normal scan doesn't?”

The joint below the ankle quietly takes up the slack, and it is measurable. Simulated weight-bearing CT with three-dimensional subtalar joint space mapping was used to compare early-stage (Takakura 2) against end-stage (Takakura 4) varus ankle osteoarthritis [239]. The most consistent structural difference between the two was not in the main articular facets but in the sinus tarsi interosseous space — all eight metrics for that region separated the stages with uniformly large effect sizes. After adjusting for disease stage, coronal alignment on weight-bearing CT was independently associated with posterior-facet joint space and with sinus tarsi narrowing. This matters downstream: subtalar health is precisely what governs whether fusion or replacement remains available later, and standard non-weight-bearing imaging does not show it.

Medial-sided ankle arthritis roughly doubles the varus load and reorganises the whole limb. Three-dimensional gait analysis of 42 patients with medial ankle osteoarthritis against 44 age-matched controls found a more than two-fold increase in ankle varus moment and reduced walking speed [240]. Patients with isolated ankle arthritis compensated in a coordinated way across the foot, knee, hip and pelvis; those who also had knee arthritis showed a less coordinated, more distal-focused pattern with fewer proximal adaptations. Read carefully: this is staged ankle osteoarthritis, not a focal post-surgical talar lesion, so it describes a possible destination rather than the current state. Its value here is as support for the argument this section already makes — that loading and alignment are upstream of any cartilage decision, and that a medial lesion sits in the path of a measurably larger load.

Added August 14, 2026 — realignment kept working after the stage where the textbooks hand the ankle to fusion

→ Once ankle arthritis reaches the stage where the talus tilts inside the joint, the usual teaching is that straightening the leg is no longer enough. A 20-patient series published this morning pushed a realignment osteotomy into exactly that stage — and the scores improved anyway, even though the tilt itself never corrected.

A Taiwanese group published a case series of distal tibial oblique osteotomy with a structural strut allograft wedged into the osteotomy gap, in 20 ankles with Takakura stage IIIa/IIIb varus ankle OA — the stage range where talar tilt has traditionally marked the edge of joint-preserving surgery [420]. MOXFQ improved 57.7 → 10.6, AOFAS 63.8 → 85.5, VAS pain 4.3 → 1.0, and all 20 osteotomies united within 3 months. The instructive detail: the tibial-side angles all corrected, but talar tilt did not significantly change — the operation reorients the plafond around the talus rather than de-tilting the talus, and the clinical result arrived anyway. For this page’s argument the series is another data point in the same direction as the cyst-regression pearl above: changing the load environment, without touching cartilage, moved the outcomes. Honest limits: Level IV, no comparison arm, follow-up length unstated in the abstract, varus-deformity anatomy rather than a post-graft lesion — and it does not answer whether any of this applies to an ankle whose alignment has never been formally measured, which remains this page’s standing complaint.