LATN

The order is the whole point. In LON the nail goes in first and the frame lengthens over it. In LATN the frame goes on first, alone, and lengthens the bone with nothing inside the canal. Only when distraction is finished does the patient return to theatre: the surgeon reams the canal, passes a locked intramedullary nail across the soft new bone, and takes the frame off in the same sitting. The nail then carries the bone through consolidation.

S. Robert Rozbruch's group at the Hospital for Special Surgery in New York described the technique in 2008, in 39 limbs (35 tibiae, 4 femora) in 27 patients treated between 2001 and 2006. The frame is built from the start so a nail can be inserted later without contact between the nail and the pins or wires. Against matched classic Ilizarov cases, LATN patients wore the frame for 12 weeks instead of 29, with an external fixation index of 0.5 months per centimetre against 1.9, and the bone healed faster (bone healing index 0.8 versus 1.9).

LATN was designed as a reconstructive tool and is used that way most of the time. Rozbruch's original series mixed malunions, nonunions, congenital shortening and growth arrest with 12 bilateral cases done for short stature or deformity. It fits the patient whose bone needs both length and alignment work, because the frame can be adjusted during distraction and the nail only goes in once the surgeon is satisfied with the axis.

In pure cosmetic lengthening it is a minority choice. In the Marwan 2020 systematic review of 795 cosmetic patients, 95 were lengthened and then nailed, drawn from two series; classic Ilizarov and LON each accounted for more than 250. That column showed the largest mean gain (7.6 cm) and the shortest external fixation index (11.4 days per centimetre) of any frame-based technique, but also the highest mean complication count per patient (0.6). None of the between-technique differences were statistically significant, and the review does not explain the complication figure. Treat the LATN evidence base as thin, not as proof either way.

Stage one looks like Ilizarov: a corticotomy, a ring frame, a short latency, then distraction at around 1 mm a day in several turns while you clean pin sites daily. Typical gains are 5–8 cm; Rozbruch's LATN cases averaged 5.4 cm (range 1.5–10). Stage two is scheduled as soon as length is reached; in the HSS protocol it is postponed if a pin site is actively infected, because operating through an infected tract invites deep infection.

At stage two the canal is reamed, the nail is locked, the frame is removed and the pin sites are left open to drain. From then on there are no pins to clean. The bone still needs months to consolidate on the nail, which is why the recovery window for LATN runs to 16–28 weeks on this page, the same as LON. The nail is generally removed in a later, smaller operation. Expect three theatre visits in total, plus the physiotherapy that any lengthening demands.

During stage one the risks are the frame's: pin-site infection, which is described as almost universal in some form with external fixation, plus nerve irritation, joint stiffness and ankle equinus. The Cochrane review of pin-site care found no cleaning regimen that clearly cuts infection, so what matters is that someone checks the sites daily and acts early.

Stage two adds its own. A reamed nail is passed through bone that has carried pins for weeks, and a contaminated tract can seed the canal. In Rozbruch's 39 limbs, one patient had a deep infection after the bone had healed; it was treated by removing the nail and six weeks of intravenous antibiotics. One femoral patient had a sciatic nerve palsy that resolved on its own, and two patients needed a repeat fibular osteotomy because the fibula fused too early. A second anaesthetic, a second recovery and a second bill are part of the method rather than complications, but plan for them.

The refracture risk that follows Ilizarov frame removal is largely removed, because the nail stays in.

On hardware, LATN uses a ring frame and a standard locked nail, so its implant cost is well below a motorised magnetic nail and roughly in line with LON. What pushes it up is theatre time: two full operations instead of one, each with anaesthesia and a hospital stay, plus the later nail removal. Whether that lands above or below a LON quote depends on how the clinic prices the second procedure.

Read every LATN quote for that line. Some packages bundle both stages, physiotherapy and nail removal; others quote stage one and treat stage two as a separate admission. A travelling patient also pays for the interval between stages, either as a longer stay or as a second trip.

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

First, confirm they mean LATN. Some clinics use the term loosely for what is really lengthening over a nail. Ask directly: does the nail go in before distraction or after? Then ask why they prefer this sequence for you; the credible answers are alignment work during distraction, or a policy of keeping pins and nail apart.

Second, ask about stage two. Who performs it, when, and what happens if a pin site is infected on the day. A clinic that says it operates anyway is ignoring the protocol the technique was published with. Ask how many LATN cases the lead surgeon does a year and how many deep infections that has produced.

Third, ask about your time. Frame weeks, the interval between stages, the total stay if you are travelling, and who manages pin sites if you go home with the frame on. Clinic profiles here list which methods each centre performs; a centre that offers Ilizarov, LON, LATN and internal nails can choose between them, which is what you want.