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Related Experiment Video

Updated: Jun 21, 2026

Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling

Surgical Fixation of Sternal Fractures: Preoperative Planning and a Safe Surgical Technique Using Locked Titanium Plates and Depth Limited Drilling

Published on: January 5, 2015

Far cortical locking can reduce stiffness of locked plating constructs while retaining construct strength.

Michael Bottlang¹, Josef Doornink, Daniel C Fitzpatrick

¹Legacy Biomechanics Laboratory, 1225 N.E. 2nd Avenue, Portland, OR 97215, USA.

The Journal of Bone and Joint Surgery. American Volume

|August 5, 2009

Summary

Far cortical locking significantly reduces construct stiffness for bone healing. This novel method maintains construct strength, improving outcomes in fracture fixation.

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Area of Science:

Orthopedic surgery
Biomechanical engineering
Bone healing research

Background:

Strategies to reduce construct stiffness are crucial for secondary bone healing in locked bridge plating.
Reducing stiffness often compromises construct strength, posing a challenge in fracture fixation.

Purpose of the Study:

To evaluate a novel stiffness-reduction technique: far cortical locking.
To determine if far cortical locking can reduce locked plating construct stiffness without sacrificing strength.

Main Methods:

Testing locked plating and far cortical locking constructs in femoral diaphysis models (non-osteoporotic and osteoporotic).
Assessing construct stiffness in axial compression, torsion, and bending.
Evaluating construct strength and failure modes under dynamic loading until failure.

Main Results:

Far cortical locking reduced initial stiffness by 88% (axial), 58% (torsion), and 29% (bending).
Axial strength showed modest reductions (7-16%), while torsional and bending strength increased (9-54%).
Far cortical locking generated greater interfragmentary motion, similar to natural bone healing.

Conclusions:

Far cortical locking effectively reduces axial stiffness in locked plating constructs.
This technique offers a favorable balance of flexibility and strength for fracture fixation.
The findings suggest potential for improved secondary bone healing with far cortical locking.