Ilizarov

Gavriil Ilizarov (1921–1992) developed the method as a rural surgeon in Russia's Kurgan region; his first patent application for the apparatus dates from June 1952, and the Kurgan institute that still carries his name was founded in 1971. The frame is rings, wires and rods. Thin wires are drilled through the bone and tensioned to the rings; threaded rods connect the rings; turning the nuts on the rods moves one ring away from the other and pulls the bone ends apart.

The biology is what Ilizarov called the tension-stress effect: bone that is cut carefully and pulled slowly and steadily regenerates in the gap. His experiments published in 1989 found that 1 mm per day was the rate that worked, with 0.5 mm per day often causing the bone to fuse early and 2 mm per day damaging the stretching tissues, and that splitting the millimetre into four small turns gave better bone than one.

The frame carries the limb through both phases: distraction, then the longer consolidation until X-rays show solid bone.

Reconstruction first. The frame does things a nail cannot: it corrects angulation and rotation while it lengthens, it works through an infected nonunion, and it can transport a bone segment across a defect, a technique the Kurgan group first described in 1969. Because every part sits outside the body it can be adjusted at any point in treatment, and nothing is left inside the bone when it comes off. It is also the only method on this site used on the humerus.

Cosmetic lengthening with a frame alone still happens, mostly where implant cost dominates. It was the largest single technique in the Marwan 2020 systematic review of cosmetic stature lengthening: 267 of 795 patients, ahead of LON with 253. The best-documented cosmetic series is Novikov's, from the Ilizarov Centre in Kurgan: 131 patients, 95% of them tibial lengthenings, mean height gain 6.9 cm. But for a healthy adult with straight bones, most surgeons now reach for an internal nail or a hybrid and keep the pure frame for the cases above.

Novikov's Kurgan protocol is the clearest published one. Distraction began on the seventh day after surgery at 0.75–1 mm per day in three or four turns, rising to 1–1.5 mm per day if X-rays showed good new bone. The distraction phase averaged 79 days, the consolidation phase 116 days, and total time in the frame 215 days (range 71–390). That is an external fixation index of 31 days per centimetre gained; across all classic Ilizarov cosmetic series in the Marwan review the mean was 42.5 days per centimetre. A month in the frame per centimetre is a fair planning figure, and it is where the 20–40 week range on this page comes from.

Every one of those days includes pin-site care: cleaning each wire entry, watching for redness and discharge, reporting early. Joints stiffen if you let them, so physiotherapy and weight-bearing start early; the Kurgan school lists weight-bearing and joint motion during lengthening as obligatory conditions for good bone. After removal, Novikov's patients wore a protective cast from thigh to ankle for two to four weeks.

Novikov's series is the reference: 48 of 131 patients (37%) had a complication, 59 events in total. Soft-tissue problems were the majority (37 events); bone-related problems accounted for 22. Twenty-three patients (18%) needed a reoperation. The most frequent single problems were a fixed flexion deformity of the knee (14 patients), ankle equinus (12), peroneal nerve irritation (6, one of which did not fully recover), and pin-tract infection needing intervention (5); three pin-tract infections progressed to deep bone infection, none of them chronic.

Pin-site infection is the defining risk of every frame method because the wires stay in for the whole treatment, months rather than weeks. Pin-track complications are described as almost universal with external fixation; most are minor and settle with dressings and antibiotics, but every one needs checking.

Refracture of the new bone after the frame comes off is the other frame-specific risk. In Paley's 1997 matched comparison there were six refractures among the 32 Ilizarov femora and none in the lengthening-over-nail group, which is why protective bracing and a graded return to load are part of any Ilizarov plan.

At the bottom for hardware. Rings, wires and rods cost a fraction of any intramedullary nail, which is why the pure frame survives in cosmetic practice in lower-cost markets. Paley's 1997 comparison found the cost of treatment lower for Ilizarov than for lengthening over a nail.

The saving is real but partial. Time in the frame is the longest of any method, so clinic visits, dressings, physiotherapy and time off work all run longer, and a travelling patient either stays near the clinic for months or goes home wearing the frame and finds local follow-up. Frame removal is a procedure of its own. When you compare an Ilizarov quote with a LON or nail quote, compare total months and total visits, not the surgery line.

This page carries no prices on purpose. The cost guide and each clinic listing do, and they are updated separately.

Ask why the frame and not a nail for you. Good answers are specific: a canal too narrow for a nail, a deformity to correct at the same time, previous infection, a segment such as the humerus, or cost with a plain explanation of the extra frame time. A vague answer usually means the clinic owns frames and not nails.

Ask for their external fixation index in days per centimetre and set it against Novikov's 31 and the review mean of 42.5. Ask how they prevent and treat the two most frequent problems in that series, knee flexion contracture and ankle equinus: physiotherapy schedule, splinting, whether the frame is extended to the foot. Ask for the pin-site protocol in writing, and who runs it once you leave.

Finally, ask about the end: removal under anaesthetic, the protective cast or brace, and when the bone may take full load. Clinic profiles on this site list which methods each centre performs and which surgeons lead them; a centre that offers frames, hybrids and nails can put you on the right one.