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Novel implant for peri-prosthetic proximal tibia fractures
Ton Tran1, Bernard K Chen2, Xinhua Wu1
1Department of Materials Science and Engineering, Monash University, Clayton, VIC 3800, Australia.
Injury
|February 7, 2018
Summary
A novel 3D-printed tibial implant with an extended flange addresses challenges in repairing fractures around knee replacements. This innovative design offers enhanced fixation and stability for peri-prosthetic fractures.
Area of Science:
- Biomedical Engineering
- Orthopedic Surgery
- Materials Science
Background:
- Peri-prosthetic proximal tibia fractures pose significant challenges in patients with total knee replacement (TKR) or arthroplasty.
- Existing fixation methods are limited by the tibial component of knee implants, restricting repair options.
- A novel implant design with an extended flange offers additional fixation points and improved stability.
Observation:
- A patient-specific implant was designed using CT scan data and computer-aided design (CAD).
- Finite Element Method (FEM) was employed for structural evaluation and optimization.
- Prototype development utilized selective laser melting (SLM) 3D printing with Ti6Al4V powder.
Findings:
- A prototype tibial implant was successfully developed based on patient-specific anatomy.
- The implant design accommodates up to 80% of patients, fitting both left and right tibias.
- The extended flange design provides superior fixation and addresses tibial component subsidence.
Implications:
- This novel implant offers a viable solution for complex peri-prosthetic tibial fractures.
- The design overcomes limitations of current generic locking plates.
- 3D printing technology enables patient-specific solutions for challenging orthopedic repairs.
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