Subchondral bone fatigue injury in the parasagittal condylar grooves of the third metacarpal bone in Thoroughbred racehorses elevates site-specific strain concentration

Condylar stress fracture of the distal end of the third metacarpal/metatarsal (MC3/MT3) bones is a major cause of Thoroughbred racehorse injury and euthanasia worldwide. Functional adaptation to exercise and fatigue damage lead to structural changes in the subchondral bone that include increased modeling (resulting in sclerotic bone tissue) and  targeted remodeling repair (resulting in focal resorption spaces in the parasagittal groove). Whether these focal structural changes, as detectable by standing computed  tomography (sCT), lead to elevated strain at the common site of condylar stress fracture has not been demonstrated. Therefore, the goal of the present study was to compare full-field three-dimensional (3D) strain on the distopalmar aspect of MC3 bone specimens with and without focal subchondral bone injury (SBI). Thirteen forelimb specimens were collected from racing Thoroughbreds for mechanical testing ex vivo and underwent sCT. Subsequently, full-field displacement and strain ..., Please refer to the linked research article for detailed explanation of the methods., , # Subchondral bone fatigue injury in the parasagittal condylar grooves of the third metacarpal bone in Thoroughbred racehorses elevates site-specific strain concentration

[https://doi.org/10.5061/dryad.8w9ghx3sk](https://doi.org/10.5061/dryad.8w9ghx3sk)
This dataset contains raw and processed experimental data from mechanical testing of condyles of MC3 bone of Thoroughbred racehorses, and their CT densities acquired with Equina Asto CT.
For best results, download all the files, scripts, and zipped folders (unzip them after) and put them all in the same directory.

## Description of the data and file structure

1- Raw experimental data are organized as follows:
Name of folders that contain the unprocessed raw experimental data begins with *rawData_* and continues with the condyle ID. For example: *rawData_POD2*, *rawData_CTRL5*, etc. These folders include images of the calibration object that is a grid of 2-mm spaced dots attached to a 1.5 inch (38.1 mm) diameter cylinder, testing video...