2026-05-082026-05-082025FERREIRA, G. J. C.; COSTA, M. A. B.; SANTOS NETO, R. C.; FERNANDES, M. R. Evaluation of tendon healing after arthroscopic repair of isolated supraspinatus tears. Acta Ortopedica Brasileira, São Paulo, v. 33, n. 2, e285693, 2025. DOI: 10.1590/1413-785220253302e285693. Disponível em: https://www.scielo.br/j/aob/a/gCLVhNL5hjDtqbwhFphssdr/?lang=en. Acesso em: 4 maio 2026.1413-7852e- 1809-4406https://repositorio.bc.ufg.br//handle/ri/30320Objective: To evaluate the healing of supraspinatus tendon lesions after arthroscopic repair, with analysis of intra- and inter-observer agreement by two experienced evaluators for the same lesions. Materials and Methods: A study was conducted with patients evaluated in the postoperative period of arthroscopic surgery to repair isolated supraspinatus tendon ruptures, with a minimum follow-up of one year. Tendon healing was evaluated using magnetic resonance imaging by two independent evaluators at two time points, with a seven-day interval between them. Categorical data were presented in absolute and relative frequencies, and mixed linear regression models were used to analyze intra- and inter-observer agreement, with a probability of rejecting the null hypothesis of 5%. Results: Twenty-three patients (26 shoulders) were evaluated, with a mean age of 61.5 years. At both evaluation times, most patients presented a healing grade between I and III in the Sugaya classification for both observers. The interobserver agreement was good, and the intraobserver agreement was excellent. Conclusion: The mean tendon healing rate for arthroscopic repair of isolated supraspinatus ruptures was 81.7%. Intra-observer agreement ratings were considered excellent, while inter-observer agreement was good, demonstrating reliability in the evaluations performed. Level of Evidence II; Cross-sectional study.engAcesso Abertohttp://creativecommons.org/licenses/by-nc-nd/4.0/Lesões do manguito rotadorArtroscopiaCicatrizaçãoEspectroscopia de ressonância magnéticaOmbroTendõesRotator cuff injuriesArthroscopyWound healingMagnetic resonance spectroscopyShoulderTendonsArtigo10.1590/1413-785220253302e285693