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Haug LP, Sill AP, Shrestha R, Patel KA, Kile TA, Fox MG. Osteochondral Lesions of the Ankle and Foot. Semin Musculoskelet Radiol 2023; 27:269-282. [PMID: 37230127 DOI: 10.1055/s-0043-1766110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Osteochondral lesions (OCLs) in the ankle are more common than OCLs of the foot, but both share a similar imaging appearance. Knowledge of the various imaging modalities, as well as available surgical techniques, is important for radiologists. We discuss radiographs, ultrasonography, computed tomography, single-photon emission computed tomography/computed tomography, and magnetic resonance imaging to evaluate OCLs. In addition, various surgical techniques used to treat OCLs-debridement, retrograde drilling, microfracture, micronized cartilage-augmented microfracture, autografts, and allografts-are described with an emphasis on postoperative appearance following these techniques.
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Affiliation(s)
- Logan P Haug
- Department of Radiology, Mayo Clinic, Phoenix, Arizona
| | - Andrew P Sill
- Department of Radiology, Mayo Clinic, Phoenix, Arizona
| | | | - Karan A Patel
- Department of Orthopedics, Mayo Clinic, Phoenix, Arizona
| | - Todd A Kile
- Department of Orthopedics, Mayo Clinic, Phoenix, Arizona
| | - Michael G Fox
- Department of Radiology, Mayo Clinic, Phoenix, Arizona
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Yue Y, Xu P, Lei Z, Li K, Xu J, Wen J, Wang S, Cheng W, Lin S, Huang Z, Xu H. Preparation and characterization of a novel drug-loaded Bi-layer scaffold for cartilage regeneration. RSC Adv 2022; 12:9524-9533. [PMID: 35424939 PMCID: PMC8985181 DOI: 10.1039/d2ra00311b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/17/2022] [Indexed: 12/18/2022] Open
Abstract
The incidence of articular cartilage defects is increasing year by year. In order to repair the cartilage tissue at the defect, scaffolds with nanofiber structure and biocompatibility have become a research hotspot. In this study, we designed and fabricated a bi-layer scaffold prepared from an upper layer of drug-dispersed gelatin methacrylate (GELMA) hydrogel and a lower layer of a drug-encapsulated coaxial fiber scaffold prepared from silk fiber (SF) and polylactic acid (PLA). These bi-layer scaffolds have porosity (91.26 ± 3.94%) sufficient to support material exchange and pore size suitable for cell culture and infiltration, as well as mechanical properties (2.65 ± 0.31 MPa) that meet the requirements of cartilage tissue engineering. The coaxial fiber structure exhibited excellent drug release properties, maintaining drug release for 14 days in PBS. In vitro experiments indicated that the scaffolds were not toxic to cells and were amenable to chondrocyte migration. Notably, the growth of cells in a bi-layer scaffold presented two states. In the hydrogel layer, cells grow through interconnected pores and take on a connective tissue-like shape. In the coaxial fiber layer, cells grow on the surface of the coaxial fiber mats and appeared tablet-like. This is similar to the structure of the functional partitions of natural cartilage tissue. Together, the bi-layer scaffold can play a positive role in cartilage regeneration, which could be a potential therapeutic choice to solve the current problems of clinical cartilage repair.
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Affiliation(s)
- Yunqing Yue
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Peihu Xu
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Zhixin Lei
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Kebi Li
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Jingyi Xu
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Jing Wen
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Sining Wang
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Wanting Cheng
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Sihui Lin
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Zhijun Huang
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
| | - Haixing Xu
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology 430070 China
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