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Related Experiment Video

Updated: Jan 28, 2026

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How to target the coronoid from the dorsal cortex.

Simone Cassin1, Valeria Vismara1, Aurelien Traverso2

  • 1Scuola Di Specializzazione in Ortopedia e Traumatologia, Università Degli Studi Di Milano, Milan, Italy.

JSES International
|January 26, 2026
PubMed
Summary
This summary is machine-generated.

This study defines a safe surgical range for targeting the ulna coronoid process from the dorsal cortex. This X-ray-free method aids elbow fracture fixation, improving anteroposterior and axial stability.

Keywords:
CT ScanCoronoid processDorsal cortexFracture fixationRangeSurgical practice

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Area of Science:

  • Orthopedic Surgery
  • Anatomy
  • Biomedical Engineering

Background:

  • The coronoid process of the ulna is vital for elbow joint stability.
  • Current methods for coronoid process fixation lack a safe, X-ray-free approach.
  • A reliable surgical targeting method is needed for optimal elbow stability.

Purpose of the Study:

  • To establish a practical surgical range for targeting the ulna coronoid process from the dorsal cortex.
  • To normalize this range based on inter-epicondylar distance (IED).
  • To provide a safe, X-ray-free technique for coronoid fixation.

Main Methods:

  • Analysis of 109 computed tomography (CT) scans.
  • Measurement of olecranon to coronoid apex (APEX) and base (BASE) distances.
  • Calculation of inter-epicondylar distance (IED) and ratios for normalization.

Main Results:

  • Mean APEX: 20.6 mm; Mean BASE: 33.9 mm; Mean IED: 59 mm.
  • Ratios of APEX/IED and BASE/IED were calculated (0.3 and 0.6, respectively).
  • Significant differences in measurements were observed between males and females (P < .05).

Conclusions:

  • A practical range for safe coronoid process targeting from the dorsal ulna cortex has been established.
  • A safe surgical approach involves a perpendicular trajectory to the olecranon's dorsal cortex.
  • Targeting within 2 to 3.5 cm from the olecranon's most prominent point ensures safety.