Malocclusion in rabbits and rodents - Types and treatment

Malocclusion is a common problem in rabbits and rodents. Because their teeth and molars grow continuously, a correct bite alignment is of great importance. When the incisors or molars wear down incorrectly, abnormalities develop that cause pain, wounds, and eating problems.

In this article, we discuss the main types of malocclusion, how they are recognized, and which treatments are available.

What is malocclusion?

A malocclusion means that the upper and lower teeth or molars do not align properly with each other. As a result, the teeth do not wear down correctly, leading to overgrown or misaligned teeth and molars.

Types of malocclusion

• Prognathism: the lower jaw is too long, causing the lower teeth to protrude in front of the upper teeth.
• Brachygnathism: the lower jaw is too short, causing the upper teeth to protrude in front of the lower teeth.
• Misaligned incisors: due to trauma or poor wear, incisors grow crooked or in the wrong direction.
• Molar abnormalities: molars do not wear down sufficiently, leading to sharp spurs or bridge formation.

Symptoms of malocclusion

• Difficulty eating or refusing hard food
• Drooling and a wet chin or chest
• Weight loss and lethargy
• Wounds or abscesses in the mouth caused by sharp teeth
• Watery eyes due to pressure from overly long teeth on the tear duct

Diagnosis

The diagnosis is made through physical examination of the mouth. For molar problems, an extensive examination under anesthesia is often needed to properly inspect the molars. X-rays are necessary to assess the jaw alignment and roots.

Treatment of malocclusion

Treatment depends on the severity and type of abnormality:

• Shortening incisors: done with a grinding tool under light sedation; cutting with clippers should never be performed, as this can split the teeth.
• Shortening molars: done under anesthesia with special equipment to remove sharp spurs or bridge formation.
• Correction of jaw alignment is usually not possible; repeated treatments are often necessary.
• In severe or chronic cases, extraction of incisors or molars may be considered.

Prevention

Proper nutrition plays a crucial role in preventing malocclusion. Rabbits and rodents need a fiber-rich diet with unlimited hay, supplemented with greens and limited amounts of pellets. Hay ensures the natural wear of the teeth and molars.

Prognosis

The prognosis depends on the severity of the abnormality. Many animals can maintain a good quality of life with regular dental treatments. In severe abnormalities or insufficient wear, lifelong care remains necessary.

Want to know more?

Read more about dentistry for rabbits and rodents at Nesto. Our veterinarians have extensive experience in diagnosing and treating dental problems in these animal species.

Frequently asked questions (FAQ)

How often do the teeth of rabbits and rodents need to be shortened?

This depends on growth and wear, usually every few weeks to months.

Is shortening teeth painful?

No, it is done under sedation or anesthesia and with special equipment, so the animal does not experience pain.

Can malocclusion be cured?

Usually not completely, but with regular care the symptoms can be well managed.

Can diet prevent malocclusion?

Yes, unlimited hay and a fiber-rich diet are essential for promoting natural wear.

Is malocclusion hereditary?

Yes, some abnormalities are hereditary; therefore, these animals are usually not bred from.