Evaluation of the long-term oral consequences of equine exodontia in 50 horses.

The research aimed to investigate the long-term effects of tooth extraction on oral health in horses, specifically focusing on the drifting and displacement of remaining teeth, tooth wear issues, and gum health. The study found that the extraction space gradually closes over time, with a dental drift rate of 15.7% per year, and the process was not affected by the horse’s age or the frequency of dental care post-extraction.

Study Purpose and Design

• The study was designed to assess the post-extraction dental drift process in horses. This means they were looking at how teeth move to fill the space left after a tooth extraction.
• The researchers also investigated associated disorders of tooth wear and long-term gum health among these horses.
• The study involved 50 horses that had undergone cheek teeth (CT) extraction due to a root infection.
• Each horse was examined thoroughly and some dental parameters were measured.

Key Findings

• The study noted a reduction in the extraction space in all cases. Complete closure of the extraction space was observed in 18% of the horses.
• The rate of dental drift was calculated to be 15.7% of the extraction space per year, with a range from 4% to 50%.
• This dental drift was not linked to the age of the horse when the extraction occurred or the frequency of dental care after extraction.
• A significant inverse relationship was found between the rate of dental drift and the time elapsed since extraction. Essentially, more time since the extraction meant less dental drift.
• Overgrowth was observed in 98% of horses on the opposite CT row. This included areas directly opposite the extracted tooth and on the Triadan 06s and 11s (specific positions of equine teeth).
• Lastly, the study found no significant difference in the number of diastemata (gaps between teeth) or the extent of periodontal disease between the tooth rows that experienced extraction and those that did not.

Implications of the Study

• The findings demonstrate that tooth extraction in horses leads to a process of dental drift, where remaining teeth move to fill the extraction space. However, this process decreases over time.
• The study also shows that age at extraction and frequency of dental care do not significantly affect dental drift.
• The results can help veterinarians and horse owners understand and anticipate the oral changes that occur following tooth extraction. This can aid in planning effective post-extraction care and interventions to maintain oral health.