Study finds, STRYDE limb lengthening nail is susceptible to
Several adverse effects were observed in patients who had implanted the first version of the STRYDE limb-lengthening nail. Pain, osteolysis, periosteal reactions, and cortical hypertrophy at the nail junction were noted. The analysis of 23 retrieved STRYDE implants are presented.

Visual inspection is undertaken of the retrieved nails and screws, mechanical evaluation of the junction, micro-CT analysis, microscopic inspection of the bushing, screws, screw holes, and separated parts of the implants. Positive material identification (PMI) and energy-dispersive X-ray spectroscopy (EDS) were used to analyze the chemical composition. The hardness of the material was also investigated.

Results:
--20/23 retrieved nails had visible signs of corrosion, i.e., discoloration at the telescopic junction.

--Micro-CT verified corrosion attacks in 12/12 scanned bushings. Corrosion, predominantly mechanically assisted crevice corrosion, was observed at the locking screws and screw holes in 20/23 nails.

--Biological material inside the nail was observed in addition to oozing from the junction of 2 nails during hardware removal, which was experimentally reproducible.

--Notably, the mechanical construction of the bushing changed from PRECICE P2 to STRYDE nails.

STRYDE nails in particular are not sealed hermetically and liquid can pass the bushing. Biodur 108 itself is corrosion resistant; yet, due to manufacture aimed at increasing strength and hardness of the alloy, mechanically assisted crevice corrosion may also be aggravated with bushing, locking screws and screw hole.

Source: https://www.tandfonline.com/doi/full/10.1080/17453674.2021.1927506?af=R
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