Abstract Dental caries is an important Public Health issue. However, the treatment of this disease in tertiary dental care requires further investigation. Therefore, the objective of this study was to evaluate caries-related hospital morbidity in the Brazilian Unified Health System (SUS) from 2008 to 2022. An ecological study was conducted with secondary data on caries-related Hospital Admission Authorizations (AIH) and in-hospital dental procedures (IDP). Data were collected nationwide and statistical analysis was performed with a significance level (p) of 5%. In the last 15 years, 3,474 caries-related AIH and 63,657 IDP were approved within SUS. There was a significant upward trend in the number of caries-related AIH (p = 0.018) and a stationary trend in the number of caries-related IDP (p = 0.841). Moreover, from 2008 to 2022, R$ 1,160,843.09 was allocated for caries-related AIH. Hospital mortality was 0.29% (10 deaths), and 75.1% were elective inpatient admissions. Among SUS users, adults constituted the majority (49%), with a higher frequency of males (59.8%) and whites (46.2%). The most frequent type of caries-related IDP was restoration of permanent teeth (55.3%). Nonetheless, during the COVID-19 pandemic years, significant reductions in caries-related AIH and IDP within the SUS were observed (all p <0.05). Thus, within the SUS, caries-related tertiary dental care has shown a specific pattern over the last 15 years, including an increase in hospitalizations and a high number of in-hospital dental procedures, especially before the COVID-19 pandemic onset. issue However investigation Therefore cariesrelated related (SUS 200 2022 (AIH inhospital IDP. . (IDP) 5 5% 1 years 3474 3 474 3,47 63657 63 657 63,65 0.018 0018 0 018 0.841. 0841 0.841 841 0.841) Moreover R 116084309 160 843 09 1,160,843.0 029 29 0.29 10 (1 deaths, deaths , deaths) 751 75 75.1 admissions users 49%, 49 49% (49%) 59.8% 598 59 8 (59.8% 46.2%. 462 46.2% 46 2 (46.2%) 55.3%. 553 55.3% 55 (55.3%) Nonetheless COVID19 COVID 19 COVID-1 all <0.05. 005 <0.05 05 <0.05) Thus onset 20 202 (IDP 347 47 3,4 6365 6 65 63,6 0.01 001 01 084 0.84 84 11608430 16 1,160,843. 02 0.2 ( 7 75. 4 (49% 59.8 (59.8 46.2 (46.2% 55.3 (55.3% COVID1 COVID- 00 <0.0 34 3, 636 63, 0.0 08 0.8 1160843 1,160,843 0. (49 59. (59. 46. (46.2 55. (55.3 <0. 116084 1,160,84 (4 (59 (46. (55. <0 11608 1,160,8 (5 (46 (55 < 1160 1,160, 116 1,160 11 1,16 1,1 1,