1. Additive-manufactured Ti-6Al-4 V/Polyetheretherketone composite porous cage for Interbody fusion: bone growth and biocompatibility evaluation in a porcine model
- Author
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Tzu Hung Lin, Meng Huang Wu, Ming Hsueh Lee, Chih-Yu Chen, Pei I. Tsai, Hong Jen Lai, Jane S.C. Tsai, Yen Yao Li, and Hsin I. Huang
- Subjects
Additive manufacturing (3D printing), Ti ,lcsh:Diseases of the musculoskeletal system ,Biocompatibility ,Polymers ,Swine ,medicine.medical_treatment ,Composite number ,Alloy ,chemistry.chemical_element ,engineering.material ,Polyethylene Glycols ,Benzophenones ,03 medical and health sciences ,0302 clinical medicine ,Rheumatology ,medicine ,Peek ,Animals ,Orthopedics and Sports Medicine ,Composite material ,Titanium ,Bone growth ,030222 orthopedics ,Bone Development ,Lumbar Vertebrae ,business.industry ,technology, industry, and agriculture ,Titanium alloy ,X-Ray Microtomography ,Ketones ,equipment and supplies ,Spinal Fusion ,chemistry ,Spinal fusion ,4 V (Ti alloy)/polyetheretherketone (PEEK) composite porous cage, porcine study ,engineering ,Female ,lcsh:RC925-935 ,6Al ,business ,Porosity ,030217 neurology & neurosurgery ,Research Article - Abstract
Background We developed a porous Ti alloy/PEEK composite interbody cage by utilizing the advantages of polyetheretherketone (PEEK) and titanium alloy (Ti alloy) in combination with additive manufacturing technology. Methods Porous Ti alloy/PEEK composite cages were manufactured using various controlled porosities. Anterior intervertebral lumbar fusion and posterior augmentation were performed at three vertebral levels on 20 female pigs. Each level was randomly implanted with one of the five cages that were tested: a commercialized pure PEEK cage, a Ti alloy/PEEK composite cage with nonporous Ti alloy endplates, and three composite cages with porosities of 40, 60, and 80%, respectively. Micro-computed tomography (CT), backscattered-electron SEM (BSE-SEM), and histological analyses were performed. Results Micro-CT and histological analyses revealed improved bone growth in high-porosity groups. Micro-CT and BSE-SEM demonstrated that structures with high porosities, especially 60 and 80%, facilitated more bone formation inside the implant but not outside the implant. Histological analysis also showed that bone formation was higher in Ti alloy groups than in the PEEK group. Conclusion The composite cage presents the biological advantages of Ti alloy porous endplates and the mechanical and radiographic advantages of the PEEK central core, which makes it suitable for use as a single implant for intervertebral fusion.
- Published
- 2021