Ronda Medical
OrthoPediatrics

SLIM Nail (simple-locking IM system)

A solid, non-telescopic, simple-locking intramedullary nail for alignment, stabilization, and fixation in long bones with a narrow medullary canal — common in osteogenesis imperfecta.

PediatricsTraumatologyOrthopedics
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The SLIM nail — threaded head and beveled tip (official render)
7Diameters
Ø2.0–6.4 mmDiameter range
80–400 mmLengths
SS316LMaterial
Clinical description

SLIM (Simple Locking IntraMedullary) is a solid, non-telescopic intramedullary nail developed by Pega Medical (an OrthoPediatrics group company) for the alignment, stabilization, and fixation of surgically prepared long bones — in deformity correction or in fractures caused by trauma or disease.

The nail is designed specifically for long bones with a narrow medullary canal, which cannot accommodate larger solid or telescopic nails. The threaded head is intended to prevent implant migration (back-out), while the proximal and distal locking options (PEGs and the “Bullet”) provide additional stability and allow lengthening over the nail.

The solid shaft, beveled tip, and “all-in-one” instrumentation are designed for simple insertion and removal. SLIM is frequently used in pediatric patients with osteogenesis imperfecta and in other situations where a narrow medullary canal poses technical difficulties. The SLIM nail is also used as an internal guide in extramedullary limb-lengthening techniques (EMILL).

Indications
  • Temporary implant for the alignment, stabilization, and fixation of surgically prepared long bones.
  • Correction of long-bone deformities (including osteogenesis imperfecta).
  • Long-bone fractures caused by trauma or disease, in narrow medullary canals.
  • Internal guide (“over the nail”) in extramedullary limb-lengthening techniques (EMILL).
Key features

For narrow canals

Designed for long bones with a narrow medullary canal that cannot accommodate larger nails.

Anti-migration threaded head

The threaded-head design aims to prevent implant back-out.

Proximal and distal locking

Interlocking options with PEGs and the “Bullet” for added stability and lengthening over the nail.

All-in-one instrumentation

A single instrument set designed for simple insertion and removal.

Product gallery
The SLIM nail — threaded head and beveled tip (official render)
The SLIM nail — threaded head and beveled tip (official render)
The SLIM nail positioned in the tibia, with a detail of the threaded head (3D model)
The SLIM nail positioned in the tibia, with a detail of the threaded head (3D model)
The SLIM nail with insertion instrumentation (driver)
The SLIM nail with insertion instrumentation (driver)
Radiograph: the SLIM nail interlocked at the proximal tibia
Radiograph: the SLIM nail interlocked at the proximal tibia
Clinical radiograph: fixation with the SLIM nail at the tibia
Clinical radiograph: fixation with the SLIM nail at the tibia
Technical specifications
Type
Solid, non-telescopic intramedullary nail with simple locking
Material
SS316L stainless steel (ASTM F138)
Available diameters
2.0 · 2.6 · 3.2 · 4.0 · 4.8 · 5.6 · 6.4 mm (7 diameters)
Lengths
80–400 mm; 400 mm blank for intraoperative customization
Head
Threaded, to prevent migration (back-out)
Tip
Beveled
Distal locking
Sizes 4.8–6.4 mm
Proximal locking
All sizes (PEGs / “Bullet”)
Anatomical locations
Long bones (femur, tibia, humerus)
Clinical evidence

A selection of publications and studies that mention use of the system. Summaries are indicative; for details, consult the original source.

Extramedullary internal limb-lengthening techniques (EMILL)

Shannon C. și colab. · Techniques in Orthopaedics, 2020

The study describes extramedullary limb lengthening using a small-diameter SLIM nail, inserted as a guide into the medullary canal to neutralize cantilever-type forces. The method extends the indications for internal lengthening to younger children and to bones with an impracticable medullary canal.

Of 13 patients (14 procedures — 10 femurs, 4 tibias), 12 reached the preoperative target within 5 mm; there were no mechanical failures of the nail.
View source

Lengthening reconstruction surgery in fibular hemimelia: a review

Fuller C. și colab. · Children (MDPI), 2021

A review of modern reconstruction methods in fibular hemimelia describes the use of the SLIM nail (Pega Medical) as an internal fixation/guidance element in extramedullary lengthenings, alongside the Paley techniques (SHORDT, SUPERankle), to equalize limb length with a plantigrade and stable foot.

View source
Certifications & compliance
CE marking FDA cleared (USA) — 510(k) K143355
Resources
Official product page SLIM surgical technique (PDF, Pega Medical) Study: SLIM installation in osteogenesis imperfecta with narrow canals (Children, 2025)

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