Content continues after advertisement

Predicting Mandibular Canal Height

Clinician's Brief (Capsule)

Sign in to Print/View PDF

Oral diseases are common in cats, and tooth extraction is the most common procedure performed in feline dentistry. This study sought: 

  • To characterize the mandible height, mandibular canal height, and distance between the interdental alveolar margin and the mandibular canal.
  • To use a patient’s age, weight, and canine tooth width at the free gingival margin level (wCGM), which was easily available during oral examination, to develop a mathematical model to predict the patient’s mandibular canal height.

Client-owned cats (n = 33) were enrolled. Right and left lateral digital skull radiographs were taken, and anatomic measurements of mandibular structures between the third molar distal root and the fourth premolar proximal root were obtained. The authors found a strong correlation between the wCGM obtained during physical examination and the radiographic measurements of the mandible height. This allowed for development of a mathematical model with a high predictive capability and low standard of error for mandibular canal height in cats. 

Clinician's Brief

The authors indicated that this mathematical model provides clinicians with additional information about the relationships between different mandibular structures, thus potentially reducing the risk for iatrogenic lesions during oral surgery. 


Cephalometric analysis involves clinically applying the relationship from measurements between various dental and anatomic structures in the head. Whereas cephalometry has many applications in orthodontics and oral surgery in humans, limited information exists in veterinary medicine. These limitations likely exist because of the wide variation in skull shapes among breeds. The conclusions from this study suggested that cephalometric analysis is accurate to determine mandibular canal height in cats. The ability to calculate this dimension may be most clinically useful when assessing the feasibility for placement of fracture fixation devices using screws, pins, or wires while trying to avoid the mandibular canal. Avoiding the mandibular canal is important because iatrogenic damage to the canal contents risks profuse hemorrhage or irreversible damage to the blood supply of vital teeth. On a broader level, the results validated that reliable methods can be discerned to establish, calculate, and predict the location or relationship of important anatomic structures.—Christopher Snyder, DVM, DAVDC


For global readers, a calculator to convert laboratory values, dosages, and other measurements to SI units can be found here.

All Clinician's Brief content is reviewed for accuracy at the time of publication. Previously published content may not reflect recent developments in research and practice.

Material from Clinician's Brief may not be reproduced, distributed, or used in whole or in part without prior permission of Educational Concepts, LLC. For questions or inquiries please contact us.


Clinician's Brief:
The Podcast
Listen as host Alyssa Watson, DVM, talks with the authors of your favorite Clinician’s Brief articles. Dig deeper and explore the conversations behind the content here.
Clinician's Brief provides relevant diagnostic and treatment information for small animal practitioners. It has been ranked the #1 most essential publication by small animal veterinarians for 9 years.*

*2007-2017 PERQ and Essential Media Studies

© 2023 Educational Concepts, L.L.C. dba Brief Media ™ All Rights Reserved. Terms & Conditions | DMCA Copyright | Privacy Policy | Acceptable Use Policy