Measurement of the Curve of Spee in horses.

This research examines the Curve of Spee in horses, which despite being recognized, lacks extensive data to explain its biomechanical relevance. By developing a novel method to measure this curve via radiographs taken of the horses’ heads and skulls, the study was able to draw a link between older age in horses and a decrease in the height of the Curve of Spee, which supports prior findings of reduced masticatory forces in geriatric horses.

Understanding the Curve of Spee and its Relevance

• The Curve of Spee refers to a natural curvature in the horses’ oral cavity that aligns with their dental arches. In humans, this curve is well-studied and has a lasting impact on masticatory forces. In horses, however, the significance of this curve is not as deeply understood.
• The study observed that older horses display profound alterations in their Curve of Spee during routine examinations, prompting investigation of changes in masticatory forces that may take place as horses age.
• There is a hypothesis that similar biomechanical relationships between the Curve of Spee and masticatory forces in humans may be applicable to horses as well.

The Methodology Used in the Study

• Obtaining direct quantitative data from measurements of the Curve of Spee can be challenging due to the long and narrow nature of a horse’s oral cavity.
• To bypass this obstacle, the researchers took radiographs of 24 horse heads and 6 horse skulls across different age ranges for analysis.
• The study then proceeded to use the radiographs to design a geometrical procedure tailored for quantifying the height of the Curve of Spee in horses.

Findings from the Research

• The measurements derived from the novel geometric procedure revealed that the height of the Curve of Spee was in fact smaller in older horses compared to younger ones.
• This key finding is consistent with earlier biomechanical research revealing decreased masticatory forces in older horses, potentially clarifying the relationship between the Curve of Spee and masticatory forces in horses.