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Cognetti DJ, Defoor MT, Yuan TT, Sheean AJ. Knee Joint Preservation in Tactical Athletes: A Comprehensive Approach Based upon Lesion Location and Restoration of the Osteochondral Unit. Bioengineering (Basel) 2024; 11:246. [PMID: 38534520 DOI: 10.3390/bioengineering11030246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/18/2024] [Accepted: 02/28/2024] [Indexed: 03/28/2024] Open
Abstract
The unique physical demands of tactical athletes put immense stress on the knee joint, making these individuals susceptible to injury. In order to ensure operational readiness, management options must restore and preserve the native architecture and minimize downtime, while optimizing functionality. Osteochondral lesions (OCL) of the knee have long been acknowledged as significant sources of knee pain and functional deficits. The management of OCL is predicated on certain injury characteristics, including lesion location and the extent of subchondral disease. Techniques such as marrow stimulation, allograft and autologous chondrocyte implantation are examined in detail, with a focus on their application and suitability in tactical athlete populations. Moreover, the restoration of the osteochondral unit (OCU) is highlighted as a central aspect of knee joint preservation. The discussion encompasses the biomechanical considerations and outcomes associated with various cartilage restoration techniques. Factors influencing procedure selection, including lesion size, location, and patient-specific variables, are thoroughly examined. Additionally, the review underscores the critical role of post-operative rehabilitation and conditioning programs in optimizing outcomes. Strengthening the surrounding musculature, enhancing joint stability, and refining movement patterns are paramount in facilitating the successful integration of preservation procedures. This narrative review aims to provide a comprehensive resource for surgeons, engineers, and sports medicine practitioners engaged in the care of tactical athletes and the field of cartilage restoration. The integration of advanced preservation techniques and tailored rehabilitation protocols offers a promising avenue for sustaining knee joint health and function in this demanding population.
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Affiliation(s)
- Daniel J Cognetti
- Department of Orthopedic Surgery, Brooke Army Medical Center, 3551 Roger Brooke Drive, San Antonio, TX 78234, USA
| | - Mikalyn T Defoor
- Department of Orthopedic Surgery, Brooke Army Medical Center, 3551 Roger Brooke Drive, San Antonio, TX 78234, USA
| | - Tony T Yuan
- Advanced Exposures Diagnostics, Interventions and Biosecurity Group, 59 Medical Wing, Lackland Air Force Base, San Antonio, TX 78236, USA
- Center for Biotechnology (4D Bio3), Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Andrew J Sheean
- Department of Orthopedic Surgery, Brooke Army Medical Center, 3551 Roger Brooke Drive, San Antonio, TX 78234, USA
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2
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Bedrin MD, Clark DM, Yow BG, Dickens JF, Kilcoyne KG. Favorable short-term outcomes of micronized allogenic cartilage scaffold for glenoid cartilage defects associated with posterior glenohumeral instability. Arthrosc Sports Med Rehabil 2023; 5:100809. [PMID: 37868657 PMCID: PMC10585635 DOI: 10.1016/j.asmr.2023.100809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/31/2023] [Indexed: 10/24/2023] Open
Abstract
Purpose To determine clinical outcomes associated with micronized allogenic cartilage scaffold use for treatment of posterior glenoid cartilage defects at 2 years. Study Design Case series. Methods A retrospective analysis of prospectively collected data was performed on a consecutive series of patients who underwent arthroscopic treatment of a symptomatic posterior glenoid cartilage defect with micronized allogenic cartilage scaffold between January 2019 and December 2020. The primary outcome was subjective shoulder value (SSV) at latest follow-up. Secondary outcomes included visual analog scale (VAS), recurrence of instability, and range of motion (ROM). Results Seven patients, including 4 in the setting of primary posterior instability and 3 in the setting of recurrent symptoms after arthroscopic posterior glenohumeral stabilization, were included in the analysis with a mean follow up of 2.6 years (range, 2-3.7 years). Statistically significant improvements were seen in SSV (median = 40, interquartile range [IQR] = 40-50 before surgery; vs median = 85, IQR = 67.5-87.5 after surgery; P = .018) and VAS (median = 4, IQR = 4-6.3 before surgery; vs median = 1, IQR = 0-1.5 after surgery; P = .010). No significant differences were seen in ROM. There were no cases of recurrent instability or reoperation. Conclusions The use of micronized allogenic cartilage scaffold for glenoid cartilage defects is associated with clinical improvement at 2-year follow-up. This is the case when performed in conjunction with index posterior labral repair when there is a concomitant glenoid cartilage defect or when performed in the setting of persistent pain and mechanical symptoms after prior posterior labral repair. Level of Evidence Level IV, therapeutic case series.
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Affiliation(s)
- Michael D. Bedrin
- Department of Orthopaedic Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland, U.S.A
- Uniformed Services University of Health Sciences, Bethesda, Maryland, U.S.A
| | - DesRaj M. Clark
- Department of Orthopaedic Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland, U.S.A
- Uniformed Services University of Health Sciences, Bethesda, Maryland, U.S.A
| | - Bobby G. Yow
- Department of Orthopaedic Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland, U.S.A
- Uniformed Services University of Health Sciences, Bethesda, Maryland, U.S.A
| | - Jonathan F. Dickens
- Uniformed Services University of Health Sciences, Bethesda, Maryland, U.S.A
- Duke University, Department of Orthopaedics, Durham, North Carolina, U.S.A
- Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Kelly G. Kilcoyne
- Department of Orthopaedic Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland, U.S.A
- Uniformed Services University of Health Sciences, Bethesda, Maryland, U.S.A
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3
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Zhang Z, Mu Y, Zhou H, Yao H, Wang DA. Cartilage Tissue Engineering in Practice: Preclinical Trials, Clinical Applications, and Prospects. TISSUE ENGINEERING. PART B, REVIEWS 2023; 29:473-490. [PMID: 36964757 DOI: 10.1089/ten.teb.2022.0190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/26/2023]
Abstract
Articular cartilage defects significantly compromise the quality of life in the global population. Although many strategies are needed to repair articular cartilage, including microfracture, autologous osteochondral transplantation, and osteochondral allograft, the therapeutic effects remain suboptimal. In recent years, with the development of cartilage tissue engineering, scientists have continuously improved the formulations of therapeutic cells, biomaterial-based scaffolds, and biological factors, which have opened new avenues for better therapeutics of cartilage lesions. This review focuses on advances in cartilage tissue engineering, particularly in preclinical trials and clinical applications, prospects, and challenges.
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Affiliation(s)
- Zhen Zhang
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR
| | - Yulei Mu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR
| | - Huiqun Zhou
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR
| | - Hang Yao
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, P.R. China
| | - Dong-An Wang
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR
- Karolinska Institutet Ming Wai Lau Centre for Reparative Medicine, HKSTP, Sha Tin, Hong Kong SAR
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen, P.R. China
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4
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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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5
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Augmented Marrow Stimulation: Drilling Techniques and Scaffold Options. OPER TECHN SPORT MED 2022. [DOI: 10.1016/j.otsm.2022.150958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Swan ER, Lynch TB, Sheean AJ. Treatment of Cartilage Defects of the Knee in Military Tactical Athletes: An Overview of Management and Clinical Outcomes. J Knee Surg 2022; 35:1165-1174. [PMID: 35488175 DOI: 10.1055/s-0042-1744190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cartilage defects of the knee are a common problem that can be caused by trauma or chronic repetitive overload and result in debilitating functional limitations. These consequences are of particular significance to military service members, who, by in large, are a group of young, active individuals with professional duties requiring full, unrestricted activity and function. The burden of knee chondral-related disease among military tactical athletes is well established, and systematic approach to the evaluation of a military member with suspected knee chondral pathology facilitates the execution of a surgical procedure that maximizes the likelihood of a return to duty. Despite advances in cartilage restoration surgery, chondral pathology of the knee remains a vexing problem and an omnipresent threat to military medical readiness and warfighter lethality.
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Affiliation(s)
- Erin R Swan
- Department of Orthopaedic Surgery, San Antonio Military Medical Center, San Antonio, Texas
| | - Thomas B Lynch
- Department of Orthopaedic Surgery, San Antonio Military Medical Center, San Antonio, Texas
| | - Andrew J Sheean
- Department of Orthopaedic Surgery, San Antonio Military Medical Center, San Antonio, Texas
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7
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Treatment of Osteochondritis Dissecans of the Capitellum Using BioCartilage in Adolescent Athletes Results in Safe and Timely Return to Play. Tech Orthop 2022. [DOI: 10.1097/bto.0000000000000596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Hoorntje A, Kuijer PPFM, Koenraadt KLM, Waterval-Witjes S, Kerkhoffs GMMJ, Mastbergen SC, Marijnissen ACA, Jansen MP, van Geenen RCI. Return to Sport and Work after Randomization for Knee Distraction versus High Tibial Osteotomy: Is There a Difference? J Knee Surg 2022; 35:949-958. [PMID: 33231278 DOI: 10.1055/s-0040-1721027] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Knee joint distraction (KJD) is a novel technique for relatively young knee osteoarthritis (OA) patients. With KJD, an external distraction device creates temporary total absence of contact between cartilage surfaces, which results in pain relief and possibly limits the progression of knee OA. Recently, KJD showed similar clinical outcomes compared with high tibial osteotomy (HTO). Yet, no comparative data exist regarding return to sport (RTS) and return to work (RTW) after KJD. Therefore, our aim was to compare RTS and RTW between KJD and HTO. We performed a cross-sectional follow-up study in patients <65 years who previously participated in a randomized controlled trial comparing KJD and HTO. Out of 62 eligible patients, 55 patients responded and 51 completed the questionnaire (16 KJDs and 35 HTOs) at 5-year follow-up. The primary outcome measures were the percentages of RTS and RTW. Secondary outcome measures included time to RTS/RTW, and pre- and postoperative Tegner's (higher is more active), and Work Osteoarthritis or Joint-Replacement Questionnaire (WORQ) scores (higher is better work ability). Patients' baseline characteristics did not differ. Total 1 year after KJD, 79% returned to sport versus 80% after HTO (not significant [n.s.]). RTS <6 months was 73 and 75%, respectively (n.s.). RTW 1 year after KJD was 94 versus 97% after HTO (n.s.), and 91 versus 87% <6 months (n.s.). The median Tegner's score decreased from 5.0 to 3.5 after KJD, and from 5.0 to 3.0 after HTO (n.s.). The mean WORQ score improvement was higher after HTO (16 ± 16) than after KJD (6 ± 13; p = 0.04). Thus, no differences were found for sport and work participation between KJD and HTO in our small, though first ever, cohort. Overall, these findings may support further investigation into KJD as a possible joint-preserving option for challenging "young" knee OA patients. The level of evidence is III.
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Affiliation(s)
- Alexander Hoorntje
- Department of Orthopaedic Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Academic Center for Evidence-Based Sports Medicine, Amsterdam, The Netherlands
- Amsterdam Collaboration on Health & Safety in Sports, Amsterdam UMC, Amsterdam, The Netherlands
- Department of Orthopaedic Surgery, Foundation FORCE (Foundation for Orthopaedic Research Care and Education), Amphia Hospital, Breda, The Netherlands
| | - P Paul F M Kuijer
- Amsterdam UMC, University of Amsterdam, Coronel Institute of Occupational Health, Amsterdam Public Health Research Institute, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Koen L M Koenraadt
- Department of Orthopaedic Surgery, Foundation FORCE (Foundation for Orthopaedic Research Care and Education), Amphia Hospital, Breda, The Netherlands
| | - Suzanne Waterval-Witjes
- Academic Center for Evidence-Based Sports Medicine, Amsterdam, The Netherlands
- Amsterdam Collaboration on Health & Safety in Sports, Amsterdam UMC, Amsterdam, The Netherlands
- Department of Orthopaedic Surgery, Foundation FORCE (Foundation for Orthopaedic Research Care and Education), Amphia Hospital, Breda, The Netherlands
| | - Gino M M J Kerkhoffs
- Department of Orthopaedic Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Academic Center for Evidence-Based Sports Medicine, Amsterdam, The Netherlands
- Amsterdam Collaboration on Health & Safety in Sports, Amsterdam UMC, Amsterdam, The Netherlands
| | - Simon C Mastbergen
- Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Anne C A Marijnissen
- Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Mylène P Jansen
- Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Rutger C I van Geenen
- Department of Orthopaedic Surgery, Foundation FORCE (Foundation for Orthopaedic Research Care and Education), Amphia Hospital, Breda, The Netherlands
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Shrestha R, Sill AP, Haug LP, Patel KA, Kile TA, Fox MG. Postoperative Ankle Imaging, 2022. Semin Musculoskelet Radiol 2022; 26:203-215. [PMID: 35654090 DOI: 10.1055/s-0042-1750841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Postoperative ankle imaging requires knowledge of the underlying surgical techniques, the usefulness of various imaging modalities, as well as an appreciation for the desired clinical outcomes. Surgical procedures discussed in this article are tibiotalar fracture fixation, tibiotalar, subtalar, and tibiotalocalcaneal arthrodesis, total ankle arthroplasty, talar osteochondral lesion repair and grafting, lateral ligamentous repair and reconstruction, and peroneal and Achilles tendon repair and reconstruction. Imaging can play a vital role in determining if the expected outcome has been achieved and identifying complications, with particular emphasis placed on the use of radiographs, computed tomography (including weight-bearing), magnetic resonance imaging, and ultrasonography.
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Affiliation(s)
- Roman Shrestha
- Department of Radiology, Mayo Clinic Arizona, Phoenix, Arizona
| | - Andrew P Sill
- Department of Radiology, Mayo Clinic Arizona, Phoenix, Arizona
| | - Logan P Haug
- Department of Radiology, Mayo Clinic Arizona, Phoenix, Arizona
| | - Karan A Patel
- Department of Orthopedics, Mayo Clinic Arizona, Phoenix, Arizona
| | - Todd A Kile
- Department of Orthopedics, Mayo Clinic Arizona, Phoenix, Arizona
| | - Michael G Fox
- Department of Radiology, Mayo Clinic Arizona, Phoenix, Arizona
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10
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Langhans MT, Strickland SM, Gomoll AH. Management of Chondral Defects Associated with Patella Instability. Clin Sports Med 2021; 41:137-155. [PMID: 34782070 DOI: 10.1016/j.csm.2021.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Cartilage defects of the patellofemoral joint are commonly found in association with patellar instability owing to abnormal biomechanics. Strategies to address chondral defects of the patellofemoral joint secondary to instability should first address causes of recurrent instability. Most patellofemoral chondral defects associated with instability are less than 2 cm2 and do not generally require intervention beyond chondroplasty. Larger defects of the patella and/or the trochlea can be repaired with osteochondral or surface cartilage repair.
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Affiliation(s)
- Mark T Langhans
- Hospital for Special Surgery, 535 E 70th Street, New York, NY 10021, USA
| | | | - Andreas H Gomoll
- Hospital for Special Surgery, 535 E 70th Street, New York, NY 10021, USA.
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11
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Cole BJ, Haunschild ED, Carter T, Meyer J, Fortier LA, Gilat R. Clinically Significant Outcomes Following the Treatment of Focal Cartilage Defects of the Knee With Microfracture Augmentation Using Cartilage Allograft Extracellular Matrix: A Multicenter Prospective Study. Arthroscopy 2021; 37:1512-1521. [PMID: 33539978 DOI: 10.1016/j.arthro.2021.01.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 01/13/2021] [Accepted: 01/17/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE To determine the short-term outcomes following microfracture augmented with cartilage allograft extracellular matrix for the treatment of symptomatic focal cartilage defects of the adult knee. METHODS Forty-eight patients enrolled by 8 surgeons from 8 separate institutions were included in this study. Patients underwent microfracture augmented by cartilage allograft extracellular matrix (BioCartilage; Arthrex, Naples, FL) and were followed at designated time points (3, 6, 12, and 24 months) to assess patient-reported outcomes (PROs), clinically significant outcomes (CSOs), and failure and complication rates. Magnetic resonance imaging (MRI) was offered at 2 years postoperatively regardless of symptomatology, and Magnetic Resonance Observation of Cartilage Repair Tissue (MOCART) 2.0 score was documented. RESULTS PRO compliance was 81.3% at 6 months, 72.9% at 12 months, and 47.9% at 2 years. All joint-specific and function-related PROs significantly improved compared to baseline at 3, 6, 12, 18, and 24 months of follow-up (P < .01), apart from Marx activity scale, which demonstrated a significant decline in postoperative scores at 2 years (P = .034). The percentage of patients achieving CSOs (as defined for microfracture) at 2 years was 90% for minimal clinically important difference and 85% for patient acceptable symptomatic state. Patient factors including age, sex, body mass index, symptoms duration, smoking, presence of a meniscal tear, lesion size, and location were not associated with CSO achievement at 2 years. One patient (2.1%) failed treatment 9.5 months postoperatively due to graft delamination and required a reoperation consisting of arthroscopic debridement. One complication (2.1%) consisting of complaints of clicking, grinding, and crepitus 15 months following the index procedure was reported. Two-year postoperative MRI demonstrated a mean 40.5 ± 22.9 MOCART 2.0 score. CONCLUSIONS In this preliminary study, we found cartilage allograft extracellular matrix to be associated with improvement in functional outcomes, high rates of CSO achievement, and low failure and complication rates at 2-year follow-up. LEVEL OF EVIDENCE Level III, prospective multicenter cohort study.
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Affiliation(s)
- Brian J Cole
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A..
| | - Eric D Haunschild
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Thomas Carter
- Orthopedic Clinic Association, Phoenix, Arizona, U.S.A
| | - John Meyer
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Lisa A Fortier
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, U.S.A
| | - Ron Gilat
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A.; Department of Orthopaedic Surgery, Shamir Medical Center and Tel Aviv University, Tel Aviv, Israel
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12
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Ewing MA, Stannard JP, Cook JL. Diagnosis and Management of Articular Cartilage and Meniscus Pathology in the Posterior Cruciate Ligament-Injured Knee. J Knee Surg 2021; 34:599-604. [PMID: 33648008 DOI: 10.1055/s-0041-1725176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Posterior cruciate ligament (PCL) injuries commonly occur in association with participation in sporting or recreational activities or due to a direct trauma. Cartilage and meniscal lesions are prevalent in PCL-injured knees with increasing likelihood and severity based on extent and duration of trauma to the knee. As such, comprehensive diagnostics should be performed to ascertain all related pathology, and patients should be thoroughly educated regarding treatment options, likely sequelae including posttraumatic osteoarthritis, and associated outcomes. Treatments should address the joint as an organ, ensuring stability, alignment, and functional tissue restoration are optimized by the most efficient and effective means possible. Compliance with patient- and procedure-specific postoperative management protocols is critical for optimizing successful outcomes for these complex cases. The objectives of this review article are to highlight the likelihood and importance of osteochondral and meniscal pathology in the PCL-injured knee, and to provide the best current evidence regarding comprehensive evaluation and management for PCL-injured knees with cartilage and/or meniscal comorbidities.
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Affiliation(s)
- Michael A Ewing
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
| | - James P Stannard
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri.,Department of Orthopaedic Surgery, Thompson Laboratory for Regenerative Orthopaedics, University of Missouri, Columbia, Missouri.,Department of Orthopaedic Surgery, Mizzou BioJoint Center, University of Missouri, Columbia, Missouri
| | - James L Cook
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri.,Department of Orthopaedic Surgery, Thompson Laboratory for Regenerative Orthopaedics, University of Missouri, Columbia, Missouri.,Department of Orthopaedic Surgery, Mizzou BioJoint Center, University of Missouri, Columbia, Missouri
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13
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Articular Cartilage Restoration Requires Cells, Scaffolds, Growth Factors, and Mechanical Stimulation. Arthroscopy 2021; 37:1359-1360. [PMID: 33896481 DOI: 10.1016/j.arthro.2021.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 03/02/2021] [Indexed: 02/02/2023]
Abstract
Tissue engineering requires cells, scaffolds, growth factors, and mechanical stimulation. In terms of cartilage restoration or repair, various innovative approaches are evolving, using host or allograft cells, biomimetic scaffolds, matrices, or membranes including hyaluronic acid, as well as diverse biological and growth factors. A current approach for the treatment of chondral or osteochondral defects enhances a microfracture procedure (introducing autologous, mesenchymal stem cells) with dehydrated micronized allograft extracellular matrix (scaffold), platelet-rich plasma (containing anabolic, anticatabolic, and anti-inflammatory growth factors), a fibrin glue sealant, and careful rehabilitation providing mechanical stimulation. Early results are encouraging; long-term outcomes including a larger number of study subjects remain to be reported.
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Power L, Acevedo L, Yamashita R, Rubin D, Martin I, Barbero A. Deep learning enables the automation of grading histological tissue engineered cartilage images for quality control standardization. Osteoarthritis Cartilage 2021; 29:433-443. [PMID: 33422705 DOI: 10.1016/j.joca.2020.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 12/22/2020] [Accepted: 12/28/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To automate the grading of histological images of engineered cartilage tissues using deep learning. METHODS Cartilaginous tissues were engineered from various cell sources. Safranin O and fast green stained histological images of the tissues were graded for chondrogenic quality according to the Modified Bern Score, which ranks images on a scale from zero to six according to the intensity of staining and cell morphology. The whole images were tiled, and the tiles were graded by two experts and grouped into four categories with the following grades: 0, 1-2, 3-4, and 5-6. Deep learning was used to train models to classify images into these histological score groups. Finally, the tile grades per donor were averaged. The root mean square errors (RMSEs) were calculated between each user and the model. RESULTS Transfer learning using a pretrained DenseNet model was selected. The RMSEs of the model predictions and 95% confidence intervals were 0.49 (0.37, 0.61) and 0.78 (0.57, 0.99) for each user, which was in the same range as the inter-user RMSE of 0.71 (0.51, 0.93). CONCLUSION Using supervised deep learning, we could automate the scoring of histological images of engineered cartilage and achieve results with errors comparable to inter-user error. Thus, the model could enable the automation and standardization of assessments currently used for experimental studies as well as release criteria that ensure the quality of manufactured clinical grafts and compliance with regulatory requirements.
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Affiliation(s)
- L Power
- Department of Biomedical Engineering, University of Basel, Switzerland; Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
| | - L Acevedo
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
| | - R Yamashita
- Department of Biomedical Data Science, Stanford University School of Medicine, USA.
| | - D Rubin
- Department of Biomedical Data Science, Stanford University School of Medicine, USA.
| | - I Martin
- Department of Biomedical Engineering, University of Basel, Switzerland; Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
| | - A Barbero
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland.
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