Objective—To determine whether odontoclastic
resorption lesions were associated with radiographic
evidence of periapical lucencies in cats.
Animals—265 feline dental patients.
Procedure—Full-mouth radiographs were examined
for evidence of odontoclastic resorption lesions, periapical
lucencies, periodontitis, and fractured teeth.
Results—Odontoclastic resorption lesions affecting
567 teeth were identified in 161 (60.8%) cats.
Periapical lucencies were identified in 53 teeth in 35
cats. Periapical lucencies were most commonly associated
with fractured teeth (25 teeth with periapical
lucencies) and severe periodontitis (21 teeth). None of
the periapical lucencies appeared to be specifically
associated with resorption lesions. Prevalence of periapical
lucencies in cats with resorption lesions was not
significantly different from prevalence in cats without.
Conclusion and Clinical Relevance—Results suggest
that although odontoclastic resorption lesions are
common in cats, pulpal involvement associated with
these lesions does not appear to be associated with
development of radiographically detectable periapical
lucencies. Crown amputation with intentional root
retention may, therefore, be a suitable alternative to
extraction in selected cats with odontoclastic resorption
lesions. (J Am Vet Med Assoc 2000;217:1866–1869)