Extraction is the gold standard treatment for feline tooth resorption (TR) in all cases where the crown is affected, and the choice between full extraction and crown amputation with intentional root retention is determined entirely by radiographic findings. No restorative treatment is indicated for any stage of feline TR — there is no known treatment that prevents development or progression of the lesion, and restoration is not a recognized option.Journal of Feli…
Full extraction is indicated when the periodontal ligament space is radiographically visible, meaning the root retains its structural integrity and the ligament has not been replaced by bone.Journal of the… In these cases, the root can be luxated and elevated conventionally, though teeth with resorptive lesions are notoriously difficult to extract due to structural compromise.Journal of Feli…
Crown amputation with intentional root retention is indicated when severe external replacement resorption is present radiographically — that is, when the periodontal ligament space is absent and the root has been replaced by bone-like tissue, making complete extraction technically complex and excessively traumatic.Journal of the… This approach is explicitly contraindicated if apical periodontitis is present, regardless of the radiographic appearance of the root.Journal of the…
It is acceptable to leave a tooth untreated when resorption is limited entirely to the root with no crown involvement, provided the patient shows no signs of oral discomfort.Journal of the… This applies to lesions that are radiographically detectable but clinically silent at the crown level.
TR staging (TR1–TR5) guides the urgency of intervention. TR1 represents mild dental hard tissue loss, TR2 moderate, TR3 deep, TR4 extensive, and TR5 describes remnants of dental hard tissue with complete gingival covering.AAHA Clinical G… Radiography is required to assign both stage and type, as clinical and tactile examination detects only late-stage lesions when they become evident in the crown.Journal of Feli…+1
Radiographic examination is non-negotiable for every treatment decision. Clinical examination alone misses root-only lesions and cannot distinguish replacement resorption from inflammatory resorption — the distinction that determines whether crown amputation is safe.Journal of Feli…+2 Lesions at the cementoenamel junction or crown can be detected clinically, but root-area lesions require dental radiographs.The Veterinary…
| Radiographic Finding | Treatment | Contraindication |
|---|---|---|
| PDL space visible, root intact | Full extraction | None specific |
| PDL space absent, replacement resorption | Crown amputation + intentional root retention | Apical periodontitis present |
| Root-only resorption, crown unaffected | Monitor (no treatment required) | Signs of oral discomfort |
| Any stage with apical periodontitis | Full extraction | Crown amputation |
Would you like guidance on how to perform crown amputation with intentional root retention, including flap design and closure technique in cats?