Study highlights limits of single-stage equine cheek tooth endodontics

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A new Equine Veterinary Journal study suggests single-stage orthograde endodontic treatment may fall short in severely infected equine cheek teeth. In the ex vivo study, researchers at Ghent University evaluated nine extracted, severely diseased cheek teeth using micro-computed tomography and histology, and found residual contamination in eight of the nine samples after treatment. The authors also reported that intercanal communications in infected teeth often differed from patterns described in healthy teeth, while no apical deltas were identified in the infected canals they examined. The finding adds to a small but growing body of work showing how the anatomy of equine cheek teeth can complicate debridement and case selection for endodontic therapy. (eurekamag.com)

Why it matters: For equine practitioners, the study reinforces that advanced cheek tooth endodontics remains technically challenging, especially in cases with severe pulpar disease and reparative dentine changes. Prior research from the same group found generally poor debridement efficacy even in healthy extracted cheek teeth, with only a slight apical advantage for reciprocating files, and BEVA educational material has noted that equine hypsodont anatomy, narrow pulp horns, and limited occlusal access all make complete mechanical debridement difficult. Taken together, the new data support careful case selection, realistic prognosis discussions with pet parents, and continued reliance on imaging, including CT where available, when planning treatment for suspected apical infection. (pubmed.ncbi.nlm.nih.gov)

What to watch: Watch for in vivo outcome studies and technique refinements that show whether multi-stage protocols, different instrumentation, or earlier intervention can improve success in infected cheek teeth. (pubmed.ncbi.nlm.nih.gov)