Background
Tooth resorptions (TR) in dogs is a common finding in intraoral radiographs. The underlaying aetiology is unknown. There is a lack of literature, no basic and clinical research and no progression study on TR in dogs.

Objectives
Description of prevalence and progression of TR in a pour breed group of Beauceron dogs and to find associations to clinical examination, bloodwork, pedrigree and further examined parameters.

Study design
Descriptive, cross-sectional, unicenter, controlled study of client owned dogs > 1 year, with a follow up of TR affected dogs.

Methods
Diagnosis of TR was based on oral examination and intraoral radiographs. A complete blood count, biochemistry panel and vitamin D 25-OH were performed and associations to age, sex, body weight, pedigree, food, working with teeth.

Results
External resorptions of the roots were identified in 61% of dogs. The first molar of all quadrants were the most commonly affected teeth. TR occurred in a young age and prevalence increased with increasing age. No correlations to further examined parameters. Progression of TR.

Main limitations
The main limitation of this study is the small size of the group.

Conclusions and clinical relevance
A high prevalence of multiple, asymptomatic TR were found in this group of dogs. The lesions affected the roots and progressed. The aetiology is still unknown, further research on TR in dogs should performed in a bigger group hereditary. Treatment.

Keywords
Dog, tooth, tooth resorption, root resorption, odontoclastic, veterinary dentistry