Agüera-Espejo, PFontalba-Navas, J LFominaya García, Hernán LuisCano-López, CMendaza de Cal, Rosa MaríaGarau Camacho, ÁngelaGuerrero, TRodríguez Quirós, Jesús2026-08-182026-08-182026Agüera-Espejo, P., Fontalba-Navas, J. L., Fominaya-Garcia, H., Cano-Lopez, C., Mendaza-DeCal, R., Garau-Camacho, A., Guerrero, T., & Rodriguez-Quiros, J. (2026). Patient-specific 3D-printed ALBA osteotomy guides for oblique tibial tuberosity osteotomy in dogs: An ex vivo study. Research in veterinary science, 210, 106330. Advance online publication. https://doi.org/10.1016/j.rvsc.2026.1063300034-528810.1016/j.rvsc.2026.106330https://hdl.handle.net/20.500.14352/139106Justificación de autores: P. Agüera-Espejo: Writing – review & editing, Writing – original draft, Investigation, Data curation. J.L. Fontalba-Navas: Writing – review & editing, Visualization, Validation, Supervision, Project administration, Investigation, Data curation, Conceptualization. H. Fominaya-Garcia: Writing – review & editing, Validation, Supervision, Methodology, Data curation. C. Cano-Lopez: Writing – review & editing, Data curation. R. Mendaza-DeCal: Writing – review & editing, Software, Methodology, Data curation. A. Garau-Camacho: Writing – review & editing, Data curation. T. Guerrero: Writing – review & editing, Visualization, Validation, Supervision. J. Rodriguez-Quiros: Writing – review & editing, Writing – original draft, Visualization, Validation, Supervision, Project administration, Investigation, Data curation.OBJECTIVE: To design and evaluate patient-specific 3D-printed osteotomy guides for Fulkerson-based oblique novel technique (FONT) and to compare their accuracy and consistency with those achieved using a freehand approach. STUDY DESIGN: Ex-vivo canine model. ANIMALS: Twelve pairs of canine cadaveric tibiae from dogs weighing 10-30 kg. MATERIALS AND METHODS: Within each pair, specimens were randomly assigned to either a Freehand osteotomy group or Osteotomy Guide Group. Pre- and postoperative computed tomography scans were obtained to assess osteotomy angles. Customized guides were designed from CT-based 3D models and manufactured using the polylactic acid filament. Postoperative CT images were used to compare the achieved osteotomy angle with the target angle (30°), and deviations between groups were analyzed using the Wilcoxon signed-rank test. RESULTS: The 3D-printed osteotomy guide group showed significantly greater accuracy and consistency compared with the freehand group. The mean osteotomy angle was 30.73° ± 1.00° in the guide group and 33.45° ± 5.33° in the freehand group. The mean deviation from the target angle was 0.88° ± 0.86° and 4.97° ± 3.81°, respectively. The use of patient-specific 3D-printed osteotomy guides reduced angular deviation by 4.09°. No guide-related complications or deformations were observed during the procedures. CLINICAL SIGNIFICANCE: Under experimental conditions, patient-specific 3D-printed advancement and lateralization-based angulation (ALBA) osteotomy guides significantly improved the accuracy and repeatability of oblique tibial osteotomies in dogs. Their use may support more precise execution of the Fulkerson-based oblique novel technique (FONT), although further in vivo studies are required to confirm their clinical applicability.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal article1532-2661https://doi.org/10.1016/j.rvsc.2026.10633042492255https://pubmed.ncbi.nlm.nih.gov/42492255/open access636.09:617.3Tibial tuberosity osteotomy3D printingPatient-specific guideAngulationOrthopedicsFONTVeterinaria3109.04 Medicina Interna