Resumen: Tooth resorption (TR; progressive destruction of hard dental tissues) varies in prevalence according to population, age, and country (29–66.1%). Our objective was twofold: describing the TR clinical presentation in Northeastern Spain, and studying 34 blood parameters to ascertain potential systemic effects associated with TR. Cases (29; presented from September 2018 to May 2019) and controls (58) were considered. Non-parametric tests were carried out to compare cases and controls for each blood parameter; those showing significant differences were chosen for multiple regression analysis (binomial logistic and hierarchical multiple regressions). In case TR was detected in 130/870 teeth (14.9%), TR stage and type were correlated (p < 0.001). Increasing CREA values (p = 0.034) and decreasing BUN/CREA and ALB/GLOB values were associated with TR presence (p = 0.029 and p = 0.03, respectively). Increasing GLOB was associated with increasing severity of TR (p < 0.01). Type 1 TR (highly related to inflammation and periodontal disease PD) was the most frequently observed type; the association of TR and inflammation biomarkers (ALB/GLOB, GLOB) are explained by this fact. The concomitant presence of PD and TR in old cats would cause TR association with kidney damage biomarkers (CREA, BUN/CREA). When affected by TR, special care in these aspects must be provided to cats. Idioma: Inglés DOI: 10.3390/ani11072125 Año: 2021 Publicado en: Animals 11, 7 (2021), 2125 [14 pp.] ISSN: 2076-2615 Factor impacto JCR: 3.231 (2021) Categ. JCR: VETERINARY SCIENCES rank: 16 / 145 = 0.11 (2021) - Q1 - T1 Categ. JCR: AGRICULTURE, DAIRY & ANIMAL SCIENCE rank: 13 / 63 = 0.206 (2021) - Q1 - T1 Factor impacto CITESCORE: 2.7 - Veterinary (Q2) - Agricultural and Biological Sciences (Q2)