CONDITION
Tooth Resorption
Tooth resorption involves progressive destruction of tooth structure, commonly affecting cats over five years of age and often causing significant oral discomfort.
Why this matters now
Tooth resorption often develops gradually in middle-aged and older cats, with studies suggesting over half of cats over five years may be affected. The condition typically progresses silently until discomfort becomes apparent through changes in eating behaviour or facial sensitivity.
The resorptive process begins at the root surface and advances into the crown. Early lesions may show no external signs, but as erosion progresses, the tooth weakens and exposes sensitive tissue. Without intervention, affected teeth can fracture or become a source of ongoing oral pain.
Signals & patterns
Early signals
Subtle chewing changes
Cats may favour one side when eating or drop food more often, reflecting early oral discomfort.
Increased jaw chattering
Sudden jaw movements during eating or grooming can indicate tooth sensitivity.
Mild drooling
Occasional drooling, sometimes with a slightly pink tinge, may appear as lesions develop.
Reduced interest in dry food
A preference shift toward softer foods can reflect dental discomfort.
Later signals
Head shaking while eating
More pronounced reactions during meals suggest advancing tooth damage.
Visible tooth damage
Pink or red tissue may become visible where enamel has eroded.
Facial sensitivity
Cats may resist having their face or jaw touched.
Click to read about the biological mechanisms
How this is usually investigated
Diagnosing tooth resorption requires careful oral examination, often under sedation, combined with dental radiography to reveal lesions beneath the gumline.
Visual oral examination
Dental probing
Dental radiographs
Full oral assessment under anaesthesia
Options & trade-offs
Management typically centres on extraction of affected teeth, though the approach varies based on lesion type and root integrity.
Full tooth extraction
Complete removal of affected tooth and roots when structure permits
Trade-offs: Eliminates pain source; requires anaesthesia and skilled technique; longer procedure.
Crown amputation
Removal of crown portion when roots have fused with bone (Type 2 lesions)
Trade-offs: Less invasive for fused roots; reduces procedure time; requires radiographic confirmation.
Pain management alone
Palliative care when extraction poses unacceptable anaesthetic risk
Trade-offs: Provides comfort but does not address underlying disease; may require ongoing medication.
Regular monitoring
Watchful observation of early, asymptomatic lesions
Trade-offs: Delays intervention; requires regular dental checks; lesions typically progress.
Common misconceptions
"Tooth resorption only affects old cats"
While more common in older cats, tooth resorption can develop in cats as young as three or four years.
"Cats show obvious signs when teeth hurt"
Cats often mask dental pain effectively; behaviour changes may be subtle until discomfort becomes severe.
"Brushing prevents tooth resorption"
Unlike decay, tooth resorption originates from within the tooth structure; oral hygiene has limited preventive effect on this specific condition.
Owners noticing changes in their cat's eating habits or facial sensitivity may find it helpful to discuss dental assessment options. Understanding the progressive nature of tooth resorption can inform decisions about timing and approach to oral care.
Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS