Currently set to Index
Currently set to Follow

Veterinary Dentistry Dental Case

Defining Dental Malocclusions in Dogs Is the First Step Toward Treatment

Defining dental malocclusions in dogs is the first step toward treatment. When teeth don't line up correctly, pain and further dental problems are likely Identifying and preventing problems

Dogs deserve the same straight, engaging smile we humans seek, right? OK, that may be stretching it a bit, but what our patients do deserve is a bite that’s comfortable. This article highlights the classes of malocclusion in dogs. Future articles in this series will address individual cases that fall into these classes and show what can be done using both common and uncommon techniques to resolve problems.


Malocclusions in dog: Normal occlusion of the incisors in a dog

Photo 1: Normal occlusion of the incisors in a dog.

Although preventing permanent teeth malocclusions is ideal, most of the cases veterinary dentists encounter consist of traumatic tooth-on-tooth or tooth-on-tissue disease in an adult patient that might otherwise have been prevented. Many patients present with severe tooth wear, fractures, endodontic disease and trauma to the palatal and lingual floor soft tissue or bone. So knowing normal anatomy is the first step in recognizing abnormal occlusions that can progress to more serious disease.


Types of malocclusions in dog

The American Veterinary Dental College (AVDC; www.avdc.org) describes dental malocclusions as follows:

  • Distoversion: A tooth that’s in its anatomically correct position in the dental arch but is abnormally angled in a distal direction.
  • Mesioversion: A tooth that’s in its anatomically correct position in the dental arch but is abnormally angled in a mesial direction.
  • Linguoversion: A tooth that’s in its anatomically correct position in the dental arch but is abnormally angled in a lingual direction.
  • Labioversion: An incisor or canine tooth that’s in its anatomically correct position in the dental arch but abnormally angled in a labial direction.
  • Buccoversion: A premolar or molar that’s in its anatomically correct position in the dental arch but is abnormally angled in a buccal direction.
  • Crossbite: A malocclusion in dog in which a mandibular tooth or teeth have a more buccal or labial position than the antagonist maxillary tooth. It can be classified as rostral or caudal. In rostral crossbite cases (similar to anterior crossbite in people), one or more of the mandibular incisor teeth are labial to the opposing maxillary incisor teeth when the mouth is closed. And in caudal crossbite cases (similar to posterior crossbite in people), one or more of the mandibular cheek teeth are buccal to the opposing maxillary cheek teeth when the mouth is closed.
Malocclusions in dog: Normal occlusion of the canines in a dog.

Photo 2: Normal occlusion of the canines in a dog.

Malocclusions in dog: Normal occlusion of the premolars in a dog

Photo 3: Normal occlusion of the premolars in a dog.


Symmetrical malocclusions

Three classes of symmetrical malocclusions occur in dogs.

Class 1 malocclusion in dog

Photo 4: A class 1 malocclusion.

Neutroclusion (Class 1 malocclusion; MAL/1): Jaw lengths are normal, but one or more teeth are in an abnormal position (Photo 4). Examples include lance canine, rostral crossbite, caudal crossbite and level bite.

Mandibular distoclusion (Class 2 malocclusion; MAL/2): The mandible resides distal (caudal) to its normal location in relation to the maxilla (Photo 5). This often results in mandibular canine teeth traumatizing the palate.

class 2 malocclusion in dog

Photo 5: A class 2 malocclusion.

Class 3 malocclusion in dog

Photo 6: A class 3 malocclusion.

Mandibular mesioclusion (Class 3 malocclusion; MAL/3): The mandible resides mesial (rostral) to its normal location in relation to the maxilla (Photo 6). Although considered normal in brachycephalic breeds, maxillary incisor contact with the lingual floor or canine teeth can cause significant trauma and discomfort.


Asymmetrical malocclusions

According to AVDC, maxillary-mandibular asymmetry describes skeletal malocclusions in dog that can occur in one of the following directions:

  • Rostrocaudal: A MAL/2 or MAL/3 malocclusions in dog is present on one side of the face while the contralateral side retains normal dental alignment.

  • Side-to-side: Loss of the midline alignment of the maxilla and mandible.

  • Dorsoventral: Results in an open bite, defined as an abnormal vertical space between opposing dental arches when the mouth is closed.

Wry bite is a nonspecific layman’s term used to describe various unilateral occlusal abnormalities, so its use isn’t recommended.


Veterinary Dental On-Demand Online Courses

The Canine Dentistry Online Course
Comprehensive Feline Dentistry Online Course
Complete 7 Part Extraction Series Online Course
Comprehensive Veterinary Dental Radiongraphic Interpretation Course
Veterinary Dentistry for the Veterinary Technician Online Course

FIND OUT WHY

OUR FRIENDS ARE SMILING

"I can’t thank Dr. Beckman enough for his mentorship and devotion to developing our dentistry skills. I never thought I’d be able to do the procedures that I have, and in a remote community, it’s a joy to see my patients benefit from that.”
Nicole Baran, DVM
Sudbury Regional Cat Hospital (Owner)
Ontario, Canada
“Hey Brett, Your passion for teaching veterinary dentistry, and the lessons I learned from you, gave me the knowledge and confidence to educate and provide my clients the best oral care for their pets. Now, as an educator, my clients are DVM students, and everyday I get to pass on lessons I learned from you.”
Greg Wolfus, DVM
Tufts University
"Attending Dr. Beckman’s canine dental wet lab was the single most valuable CE I had experienced in my then 10 years as a veterinarian.”

“I was already doing fairly good dentistry, was using dental x-rays and had good technicians, but Dr. Beckman taught me how to utilize those tools to be a better practitioner and to be more profitable.”
Dr. Geoffrey Adams
Pasco Animal Hospital
New Port Richey, Florida
“Dr. Beckman’s Canine and Feline Dentistry seminars include relevant, practical and engaging lectures, interspersed with hands-on experience performing full-mouth extractions in dogs and cats.”

“Dr. Beckman’s team is friendly, fun, and extremely knowledgeable. Annie Mills LVT, VTS (Dentistry) does a stellar job organizing the events, making for a smooth and enjoyable learning experience.”
Erin V. Abrahams, DVM
Angell Animal Medical
Center Boston, MA
 
 
More Vet Reviews More Tech Reviews
Back to Top ▲