Kang et al: Zygomatic arch reconstruction with a patient-specific polycaprolactone beta-tricalcium phosphate scaffold after parosteal osteosarcoma resection in a dog
Veterinary Surgery 8, 2022

🔍 Key Findings

• Patient-specific 3D-printed PCL/β-TCP scaffold enabled successful zygomatic arch reconstruction in a dog.
• Complete surgical resection of a zygomatic parosteal osteosarcoma was achieved, with a 0.3 mm histologically clean margin.
• Post-op imaging showed progressive tissue ingrowth into the scaffold, with Hounsfield Units increasing from 20.4 to 97.8 over 10 months.
• No complications (e.g., infection, displacement) or tumor recurrence were noted at 16-month follow-up.
• Use of a patient-specific osteotomy guide improved anatomical fit and facilitated precise excision and implant placement.
• Facial symmetry and orbital stability were maintained throughout follow-up.
• The scaffold remained structurally stable despite limited bone regeneration, suggesting connective tissue filled the defect.
• Topical mitomycin C was applied intraoperatively for possible anti-neoplastic effect, but efficacy remains unclear.