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Fractures: Bone Repair

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...

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Related Experiment Video

Updated: Jul 14, 2026

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models

Published on: October 9, 2014

A hexapod robot external fixator for computer assisted fracture reduction and deformity correction.

K Seide¹, M Faschingbauer, M E Wenzl

¹Berufsgenossenschaftliches Unfallkrankenhaus (Trauma Center), Hamburg, Germany. k.seide@buk-hamburg.de

The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS

|May 24, 2007

Summary

A novel hexapod robot-based external fixator offers precise, stable, and adaptable bone movement for fracture treatment. This advanced system, evolving into an intelligent fixator, promises automated deformity correction.

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Published on: March 24, 2019

Area of Science:

Robotics in Medicine
Orthopedic Surgery
Biomechanical Engineering

Background:

Conventional external fixators have limitations in achieving precise, multi-directional bone adjustments.
Existing systems often require component changes for different treatment phases, impacting efficiency and stability.

Purpose of the Study:

To develop a novel external fixator system utilizing hexapod robot kinematics for precise bone manipulation.
To create a versatile and stable external fixation device adaptable to various fracture and deformity treatments.
To advance the concept towards an intelligent, automated fracture and deformity correction system.

Main Methods:

Development of a manually controlled external fixator based on hexapod robot kinematics.
Integration of electromotor elements to create a "fracture reduction robot".
Incorporation of load measurement capabilities and conceptual extension to an "intelligent fixator".

Main Results:

The developed hexapod external fixator allows for high-precision bone movements in all six spatial degrees of freedom.
The system provides stability during complex three-dimensional bone adjustments without requiring part changes.
Progressive development led to a motorized fracture reduction robot with load sensing and future intelligent control.

Conclusions:

Hexapod robot kinematics enable the creation of highly precise, stable, and adaptable external fixators for orthopedic applications.
The system overcomes limitations of conventional fixators, offering versatile treatment possibilities.
The ongoing development towards an intelligent fixator signifies a future of automated and optimized fracture and deformity management.