CORL

CORL (Chronic Odontoclastic Resorptive Lesions) refers to a progressive dental disease in dogs in which the body’s own cells, so-called odontoclasts, gradually break down tooth substance. The equivalent in cats is called FORL (Feline Odontoclastic Resorptive Lesions).

Causes and Risk Factors

The exact cause has not yet been fully researched. The following are discussed:

• Genetic predisposition: Certain breeds appear to be more susceptible.
• Chronic inflammation in the oral cavity
• Mineral imbalance: Disorders in calcium and phosphate metabolism
• Tartar and plaque: Promote inflammation in the periodontal ligament

Symptoms of CORL

Dogs often hide toothache for a long time. Indications may include:

• Pain when chewing or eating
• Excessive drooling, sometimes with blood
• Bad breath (halitosis)
• Sudden avoidance of chew toys
• Weight loss due to lack of appetite
• Sensitivity when touching the mouth

Diagnosis

The breakdown usually begins inside the tooth, so a dental X-ray is essential. During the clinical examination, few changes are often visible on the surface, meaning it is not sufficient on its own.

Treatment

CORL cannot be cured; affected teeth usually need to be extracted to relieve pain.

• Tooth extraction of affected teeth
• Pain management with anti-inflammatory medications
• Regular check-ups to detect new lesions early

Prevention

Complete prevention is not possible. The following measures can reduce the risk:

• Regular brushing with dog-friendly toothpaste
• Chew toys and dental treats for mechanical cleaning
• Veterinary dental cleaning, especially in older dogs
• Early dental examinations with X-rays