Assessment of Skin and Mucosa at the Equine Oral Commissures to Assess Pathology from Bit Wear: The Oral Commissure Assessment Protocol (OCA) for Analysis and Categorisation of Oral Commissures.

The research article is about the development and application of the Oral Commissure Assessment (OCA) protocol, a tool used to examine and categorize oral lesions in horses. The study also investigates the correlation between such lesions, the pigmentation changes, and variables such as the horse’s level of training or use of a bit.

Oral Commissure Assessment (OCA) Protocol Development

The primary focus of the study was on creating a methodological approach for examining and classifying lesions around the corners of a horse’s lips, known as the Oral Commissure Assessment (OCA) protocol. The protocol was designed after:

• Sedating and photographing the oral commissures (corners of the mouth) of 206 horses presented for routine preventative dental treatment
• Analyzing the photographs for signs of pigmentation changes, scars, roughness, contusion/erosion (bruising), and ulcers.

Researched Factors and Findings

The study looked at several factors in relation to the presence of these lesions:

• The level of a horse’s training: Pathological changes in pigmentation and scars tended to occur more frequently in horses with more advanced training. This was statistically significant, suggesting a possible association between increased stress or physical demands and the development of lesions.
• The horse’s color: Lighter-colored horses were more likely to show pigment changes, possibly due to their skin being more sensitive or less protected against damage.
• The use of a bit: Despite the common assumption, the study found no statistically significant association between the use of a bit and the presence of lesions.
• The horse’s discipline: Like the use of a bit, the discipline a horse was involved in also showed no statistically significant correlation with the occurrence of lesions.

Implications of the Study

The study is beneficial in several ways:

• Helps to systematically categorize and record the presence and type of lesions at the oral commissures of horses, thereby identifying possible signs of disease or injury.
• Finds correlations between various factors and lesions, which could aid in prevention or early detection of mouth issues in horses.
• Challenges the prevalent assumption that the use of a bit or participation in certain disciplines may be primary contributors to oral issues in horses.
• Facilitates more objective and standardized assessments of horse oral health, enabling better comparisons of data across studies.