A method to estimate the initial length of equine tendons.

This research article presents a method for estimating the initial length of equine tendons during the onset of loading, using a process that involves fitting third-order polynomial functions on load-elongation data.

Methodology Description

• The article proposes a procedure for determining the length of a tendon at the onset of loading. The onset of loading refers to the moment that the tendon begins to bear weight or tension. This is critical in the management of tendon-related conditions in equine animals, as it can help vet professionals understand the points at which tendons may be more susceptible to injury.
• The researchers posit that this length can be determined objectively, avoiding estimation errors that could impact the accuracy of the results.

Using Third-Order Polynomial Functions

• To determine the length of the tendon at the onset of loading, the researchers suggest fitting third-order polynomial functions on the load-elongation data. A third-order polynomial function is a mathematical function that is defined by a polynomial of degree three. They are used when a dataset exhibits a cubic trend.
• Load-elongation data refers to the information collected on how the length of a tendon changes in response to variations in load. By fitting a third-order function to this data, researchers are able to more accurately model these variations.

Detecting the Onset of Loading

• The onset of loading is detected by observing an increase in the fit of the polynomial function. As the fit of a polynomial function improves when data points are close to the function’s curve, an increase in the fit indicates that loading has begun.
• The authors also mention the use of selective data reduction of the initial part of the load-elongation curve in identifying the onset of loading. This involves omitting some data points at the beginning stages of the curve to improve the quality of the function fit.

Definition of Zero Strain Level

• The procedure described in this article also allows for an objective and reproducible definition of the zero strain level of a tendon. Strain refers to the level of deformation experienced by the tendon in response to stress, and a zero strain level would correspond to the point at which the tendon is not under any external pressure or load.
• The ability to objectively define the zero strain level provides a standard benchmark for measuring changes in the tendons’ strain responses, resulting in more reliable and consistent data.