Changes

==Description==  

==Description==  

Feline odontoclastic resorptive lesions (FORLs) are the most commonly seen dental lesions in cats. On examination, there is a loss of dental tissue on the [[Crown|crown]] or at the neck of the teeth. The crown may be completely resorbed with the remaining root covered with [[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology|gingiva]].

Feline odontoclastic resorptive lesions (FORLs) are the most commonly seen dental lesions in cats. On examination, there is a loss of dental tissue on the [[Crown|crown]] or at the neck of the teeth. The crown may be completely resorbed with the remaining root covered with [[Gingiva Introduction|gingiva]].

The aetiology and pathogenesis of FORLs has not yet been demonstrated but is almost certainly multifactorial. Possible hypotheses that have been suggested include, the texture of the diet, abnormal calcium regulation, hypervitaminosis A, mechanical stress, anatomical abnormalities of the teeth, viral infections and plaque bacteria and periodontal disease.

The aetiology and pathogenesis of FORLs has not yet been demonstrated but is almost certainly multifactorial. Possible hypotheses that have been suggested include, the texture of the diet, abnormal calcium regulation, hypervitaminosis A, mechanical stress, anatomical abnormalities of the teeth, viral infections and plaque bacteria and periodontal disease.

==Pathology==

==Pathology==

Odontoclasts attack external and internal to the [[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology|tooth]]. Initially they start at the neck/cervical region and extend into [[Root - Anatomy & Physiology|tooth root]] they also enter the root via the apical foramen (stage 3 lesions).

Odontoclasts attack external and internal to the [[:Category:Teeth - Anatomy & Physiology|tooth]]. Initially they start at the neck/cervical region and extend into [[Root - Anatomy & Physiology|tooth root]] they also enter the root via the apical foramen (stage 3 lesions).

Odontoclasts are normally only active in young animals to resorb the [[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology#Temporary Tooth|deciduous teeth]] to make way for the [[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology#Permanent Tooth|permanent teeth]] so this is abnormal activation in adults.

Odontoclasts are normally only active in young animals to resorb the [[Tooth Development|deciduous teeth]] to make way for the [[Tooth Development#Permanent Tooth|permanent teeth]] so this is abnormal activation in adults.

FORLs are different from [[Dental Caries|dental caries]] which is demineralization by bacteria fermenting carbohydrate on the [[Enamel|enamel]].  

FORLs are different from [[Dental Caries|dental caries]] which is demineralization by bacteria fermenting carbohydrate on the [[Enamel|enamel]].