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Swift B, Zhang T, Akhter F, Chilelli BJ. Single-Stage Combined Autologous-Allogenic Cartilage Restoration: Surgical Technique. Arthrosc Tech 2024; 13:103024. [PMID: 39233809 PMCID: PMC11369936 DOI: 10.1016/j.eats.2024.103024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 03/09/2024] [Indexed: 09/06/2024] Open
Abstract
Articular cartilage injuries in young patients pose a notable treatment dilemma. Multiple reported techniques exist, although some of the most prominent methods currently rely on multiple procedures for chondrocyte harvest and colony expansion prior to implantation. The associated cost and effort this requires limits availability on a global basis, which creates a need for a more widely available cartilage procedure. This Technical Note describes a method for cartilage restoration that incorporates autologous chondrocytes in allogenic extracellular matrix, along with biologic augmentation all performed in a single stage.
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Affiliation(s)
- Brendan Swift
- Mercy Health-Cincinnati Sports Medicine and Orthopaedic Center, Cincinnati SportsMedicine Research and Education Foundation, Cincinnati, Ohio, U.S.A
| | - Ting Zhang
- Mercy Health-Cincinnati Sports Medicine and Orthopaedic Center, Cincinnati SportsMedicine Research and Education Foundation, Cincinnati, Ohio, U.S.A
| | - Fauzan Akhter
- Mercy Health-Cincinnati Sports Medicine and Orthopaedic Center, Cincinnati SportsMedicine Research and Education Foundation, Cincinnati, Ohio, U.S.A
| | - Brian J. Chilelli
- Mercy Health-Cincinnati Sports Medicine and Orthopaedic Center, Cincinnati SportsMedicine Research and Education Foundation, Cincinnati, Ohio, U.S.A
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Frings J, Baranowsky A, Korthaus A, Berninger MT, Frosch KH, Fahlbusch H, Fal MF, Ondruschka B, Buhs M, Keller J, Krause M. Arthroscopic Shaver-based Harvest of Minced Cartilage Results in Reduced Chondrocyte Viability and Reduced Quality of Cartilaginous Repair Tissue Compared With Open Harvest and Conventional Fragmentation. Arthroscopy 2024:S0749-8063(24)00397-9. [PMID: 39230539 DOI: 10.1016/j.arthro.2024.05.020] [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] [Received: 12/06/2023] [Revised: 05/03/2024] [Accepted: 05/09/2024] [Indexed: 09/05/2024]
Abstract
PURPOSE To characterize and compare the quality of regenerative cartilage tissue (ReCT) after conventional minced cartilage (CMC) and arthroscopic minced cartilage (AMC), in terms of cell viability, gene expression, and matrix synthesis and to investigate the influence of different shaver types. METHODS Chondral tissue was harvested from the knees of 8 porcine donors. Porcine specimens were euthanized one day before harvest. AMC was created with 2 shaver blades in 2 operating modes (oscillating vs forward) and compared with a scalpel-fragmented CMC control. Before histologic analysis, 50% of the tissue was digested to prevent dedifferentiation of chondrocytes to fibroblasts. Cells were cultured and analyzed for cell viability, gene expression of cartilage-specific markers (aggrecan [ACAN], collagen type II, alpha1 [COL2A1], collagen type I, alpha1 [COL1A1], fibronectin-1 [FN1]), and matrix synthesis (Alcian-blue). RESULTS AMC tissue contained fewer viable chondrocytes (41%-54% vs 91%; P = .001-.048) compared with CMC. After culture, CMC showed greater expressions of ACAN (27 virtual copy numbers [VCN]/housekeeping gene) and COL2A1 (30 VCN) compared with AMC (ACAN 2-9 VCN, COL2A1 2-7 VCN, P = .001-.039). AMC presented greater expressions of COL1A1 (9-21 VCN) and FN1 (12-17 VCN) than CMC (1 and 6 VCN, P = .001-.050). The signal intensity of the cartilage matrix formed by CMC (86/mm2) was greater than by AMC (7-10 mm2, P = .001-.032). CONCLUSIONS CMC contained high numbers of viable chondrocytes, resulting in high-quality, hyaline-like ReCT. In contrast, AMC showed impaired chondrocyte quantity and viability, showing greater expressions of fibroblast markers and a decreased formation of mature cartilage matrix in porcine samples. The high chondrogenic potential of CMC to form hyaline-like ReCT was not confirmed for AMC. CLINICAL RELEVANCE On the basis of our findings, arthroscopic harvest of minced cartilage leads to reduced chondrocyte viability and ReCT quality. Accordingly, CMC and AMC cannot be regarded as synonymous techniques, as arthroscopic techniques seem to be less efficacious.
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Affiliation(s)
- Jannik Frings
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anke Baranowsky
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alexander Korthaus
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus T Berninger
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Karl-Heinz Frosch
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Department of Trauma Surgery, Orthopaedics and Sports Traumatology, BG Hospital Hamburg, Hamburg, Germany
| | - Hendrik Fahlbusch
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Milad Farkondeh Fal
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Benjamin Ondruschka
- Institute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Johannes Keller
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Matthias Krause
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Athiviraham A. Editorial Commentary: Three-Dimensional-Printed Biphasic (Osteochondral) Scaffolds Delivering Autologous Chondrocytes Hold Clinical Promise. Arthroscopy 2024:S0749-8063(24)00405-5. [PMID: 38866377 DOI: 10.1016/j.arthro.2024.06.004] [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] [Received: 06/03/2024] [Accepted: 06/03/2024] [Indexed: 06/14/2024]
Abstract
Three-dimensional-printed biphasic scaffolds combine autologous chondrocytes for effective cartilage repair. A recent study demonstrated promising short-term outcomes for biphasic scaffolds compared with traditional marrow-stimulation techniques, although long-term durability and appropriate control comparisons remain concerns. Scaffold materials can include polysaccharides (e.g., alginate, hyaluronic acid, and chitosan) and proteins (e.g., collagen, gelatin, and fibronectin). They also may be combined with other classes of materials to improve their mechanical properties and bioactivity. Synthetic polymers include polyethylene glycol and poly(lactic-co-glycolic acid), among many others. Challenges of these scaffold materials include biocompatibility, inadequate integration, and variability in clinical outcomes. Delivering autologous minced chondrocytes via a biphasic scaffold consisting of poly(lactic-co-glycolic acid) for the chondral phase and β-tricalcium phosphate for the osseous phase is a promising technology.
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Alvero AB, Wright-Chisem J, Vogel MJ, Wright-Chisem A, Mather RC, Nho SJ. Treatment of Hip Cartilage Defects in Athletes. Sports Med Arthrosc Rev 2024; 32:95-103. [PMID: 38978203 DOI: 10.1097/jsa.0000000000000378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Chondral defects in the athlete's hip are a relatively common occurrence, often presenting with debilitating pain and activity limitation. Preoperative identification of cartilage defects is challenging and there are many different modalities for treatment. Nonsurgical interventions, including activity modification, physical therapy, and injections, play a vital role, especially in less severe cases and as adjuncts to surgical intervention. Treating surgeons must be familiar with the cartilage restoration procedures available, including debridement, microfracture, and various implantation and transplantation options. Safe and effective management of cartilage defects is imperative to an athlete's return to sport. It is also imperative that surgeons are aware of all these various treatment options to determine what modality is best for their patients. This review serves to outline these options, cover the published literature, and provide general guidelines for surgeons when they encounter chondral defects in the office and the operating room.
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Affiliation(s)
- Alexander B Alvero
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center; Chicago, IL
| | - Joshua Wright-Chisem
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center; Chicago, IL
| | - Michael J Vogel
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center; Chicago, IL
| | - Adam Wright-Chisem
- Department of Orthopedic Surgery, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Richard C Mather
- Department of Orthopedic Surgery, Duke University Medical Center, Durham, NC
| | - Shane J Nho
- Section of Young Adult Hip Surgery, Division of Sports Medicine, Department of Orthopedic Surgery, Rush Medical College of Rush University, Rush University Medical Center; Chicago, IL
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Thacher RR, Pascual-Leone N, Rodeo SA. Treatment of Knee Chondral Defects in Athletes. Sports Med Arthrosc Rev 2024; 32:75-86. [PMID: 38978201 DOI: 10.1097/jsa.0000000000000405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Cartilage lesions of the knee are a challenging problem, especially for active individuals and athletes who desire a return to high-load activities. They occur both through chronic repetitive loading of the knee joint or through acute traumatic injury and represent a major cause of pain and time lost from sport. They can arise as isolated lesions or in association with concomitant knee pathology. Management of these defects ultimately requires a sound understanding of their pathophysiologic underpinnings to help guide treatment. Team physicians should maintain a high index of suspicion for underlying cartilage lesions in any patient presenting with a knee effusion, whether painful or not. A thorough workup should include a complete history and physical examination. MRI is the most sensitive and specific imaging modality to assess these lesions and can provide intricate detail not only of the structure and composition of cartilage, but also of the surrounding physiological environment in the joint. Treatment of these lesions consists of both conservative or supportive measures, as well as surgical interventions designed to restore or regenerate healthy cartilage. Because of the poor inherent capacity for healing associated with hyaline cartilage, the vast majority of symptomatic lesions will ultimately require surgery. Surgical treatment options range from simple arthroscopic debridement to large osteochondral reconstructions. Operative decision-making is based on numerous patient- and defect-related factors and requires open lines of communication between the athlete, the surgeon, and the rest of the treatment team. Ultimately, a positive outcome is based on the creation of a durable, resistant repair that allows the athlete to return to pain-free sporting activities.
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Affiliation(s)
- Ryan R Thacher
- Department of Orthopaedic Surgery, Sports Medicine Institute, Hospital for Special Surgery, New York, NY
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Gaissmaier C, Angele P, Spiro RC, Köhler A, Kirner A, Niemeyer P. Hydrogel-Based Matrix-Associated Autologous Chondrocyte Implantation Shows Greater Substantial Clinical Benefit at 24 Months Follow-Up than Microfracture: A Propensity Score Matched-Pair Analysis. Cartilage 2024:19476035241235928. [PMID: 38501741 DOI: 10.1177/19476035241235928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/20/2024] Open
Abstract
OBJECTIVE To compare substantial clinical benefit (SCB) of a hydrogel-based, matrix-associated autologous chondrocyte implantation (M-ACI) method versus microfracture (MFx) in the treatment of knee cartilage defects. DESIGN Propensity score matched-pair analysis, using the MFx control group of a phase III study as comparator for M-ACI treatment in a single-arm phase III study, resulting in 144 patients in the matched-pair set. RESULTS Groups were comparable regarding baseline Knee Injury and Osteoarthritis Outcome Score (KOOS), sex, age, body mass index, symptom duration, smoking status, and previous knee surgeries. Defect sizes in the M-ACI group were significantly larger than in the MFx group (6.4 cm2 vs. 3.7 cm2). Other differences concerned location, number, and etiology of defects that were not considered to influence the interpretation of results. At 24 months, significantly more patients in the M-ACI group achieved SCB in KOOS pain (72.2% vs. 48.6%; P = 0.0108), symptoms (84.7% vs. 61.1%, P = 0.0039), sports/recreation (84.7% vs. 56.9%, P = 0.0008), and quality of life (QoL; 72.2% vs. 44.4%, P = 0.0014). The SCBs for KOOS activities in daily living and International Knee Documentation Committee score were higher for M-ACI but not significantly different from MFx. The SCB rates consistently favored M-ACI from 3 months onward. The highest improvements from baseline at 24 months in patients with SCB were observed for KOOS sports/rec. (M-ACI: 60.8 points, MFx: 55.9 points) and QoL (M-ACI: 58.1, MFx: 57.4). CONCLUSION Hydrogel-based M-ACI demonstrated superior SCB in KOOS pain, symptoms, sports/rec., and QoL compared with MFx in patients with knee cartilage defects through 2 years follow-up.
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Affiliation(s)
| | - Peter Angele
- Sporthopaedicum Regensburg, Regensburg, Germany
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | | | - Annette Köhler
- TETEC-Tissue Engineering Technologies AG, Reutlingen, Germany
| | | | - Philipp Niemeyer
- OCM Orthopädische Chirurgie München, Munich, Germany
- Department of Orthopedics and Trauma Surgery, University Medical Center Freiburg, Albert Ludwig University of Freiburg, Freiburg, Germany
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de Caro F, Vuylsteke K, Van Genechten W, Verdonk P. Acellular Aragonite-Based Scaffold for the Treatment of Joint Surface Lesions of the Knee: A Minimum 5-Year Follow-Up Study. Cartilage 2024:19476035241227346. [PMID: 38899593 DOI: 10.1177/19476035241227346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/21/2024] Open
Abstract
OBJECTIVE A novel aragonite-based scaffold has been developed. In this study, mid-term clinical and magnetic resonance imaging (MRI) results on 12 patients affected by isolated chondral or osteochondral lesions of the knee treated by the scaffold implantation have been evaluated at a mean follow-up of 6.5 (range: 5-8) years. DESIGN The study population consisted of 3 females and 9 males, mean age 34.4 (20-51) years. The lesion was located on the medial femoral condyle, the trochlea, and the lateral femoral condyle in 5, 5, and 2 patients, respectively. In all cases, a single lesion over grade 3 of the International Cartilage Restoration and Joint Preservation Society (ICRS) classification was treated: in 9 cases by implantation of one plug, and in 2 cases with 2 plugs; the mean size of the lesion was 2.5 cm2 (1-7). RESULTS One patient failed and was revised with a custom-made metal implant (Episealer). Overall, Knee Injury and Osteoarthritis Outcome Score (KOOS) significantly improved from 45 ± 13 preoperatively to 86 ± 13 at final follow-up. All KOOS subscales improved significantly: pain subscale increased from 48 ± 12 to 92 ± 11; symptoms from 66 ± 13 to 91 ± 13; activity of daily living (ADL) from 60 ± 19 to 90 ± 21; sport from 23 ± 20 to 75 ± 20; finally, quality of life (QoL) increased from 27 ± 14 to 77 ± 19. Long-term MRI MOCART score was 64. CONCLUSIONS This study shows continued significant clinical improvement and good magnetic resonance imaging (MRI) findings with a minimum 5 years follow-up after implantation of a novel aragonite derived scaffold for the treatment of cartilage lesions of the knee. One patient failed and was revised with a custom-made metal implant (Episealer).
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Affiliation(s)
| | | | | | - Peter Verdonk
- MoRE Institute, Antwerp, Belgium
- Orthoca, Antwerp, Belgium
- Antwerp University, Antwerp, Belgium
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Dhillon J, Orozco E, Keeter C, Scillia AJ, Harris JD, Kraeutler MJ. Microfracture of Acetabular Chondral Lesions Is Not Superior to Other Cartilage Repair Techniques in Patients With Femoroacetabular Impingement Syndrome: A Systematic Review. Arthroscopy 2024; 40:602-611. [PMID: 37355179 DOI: 10.1016/j.arthro.2023.05.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 05/17/2023] [Accepted: 05/26/2023] [Indexed: 06/26/2023]
Abstract
PURPOSE To perform a systematic review to compare clinical outcomes of hip arthroscopy patients undergoing microfracture (MFx) versus other cartilage repair procedures for chondral lesions of the acetabulum. METHODS A systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines by searching PubMed, the Cochrane Library, and Embase to identify comparative studies that directly compared outcomes between MFx and other cartilage repair procedures for full-thickness chondral lesions of the acetabulum identified during hip arthroscopy. The search phrase used was: hip AND arthroscopy AND microfracture. Patients were evaluated based on reoperation rates and patient-reported outcomes. RESULTS Six studies (all Level III evidence) met inclusion criteria, including a total of 202 patients undergoing microfracture (group A) and 327 patients undergoing another cartilage repair procedure (group B). Mean patient age ranged from 35.0 to 45.0 years. Mean follow-up time ranged from 12.0 to 72.0 months. Significantly better patient-reported outcomes (PROs) were found in patients undergoing treatment with bone marrow aspirate concentrate, microfragmented adipose tissue concentrate, autologous matrix-induced chondrogenesis, and a combination of autologous matrix-induced chondrogenesis and bone marrow aspirate concentrate compared with MFx. No studies found significantly better postoperative PROs in group A. The reoperation rate ranged from 0% to 34.6% in group A and 0% to 15.9% in group B. Three of 5 studies reporting on reoperation rate found a significantly greater reoperation rate in group A, with no difference in the other 2 studies. CONCLUSIONS The literature on MFx of acetabular chondral lesions is limited and heterogeneous. Based on the available data, MFx alone results in a greater or equivalent reoperation rate and inferior or equivalent PROs compared with other cartilage repair procedures for acetabular chondral lesions in patients with femoroacetabular impingement syndrome. LEVEL OF EVIDENCE Level III, systematic review of level III studies.
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Affiliation(s)
- Jaydeep Dhillon
- Rocky Vista University College of Osteopathic Medicine, Parker, Colorado, U.S.A
| | - Erin Orozco
- Houston Methodist Hospital, Houston, Texas, U.S.A
| | - Carson Keeter
- Department of Orthopedics, University of Colorado School of Medicine, Aurora, Colorado, U.S.A
| | - Anthony J Scillia
- Department of Orthopaedic Surgery, St. Joseph's University Medical Center, Paterson, New Jersey, U.S.A.; Academy Orthopaedics, Wayne, New Jersey, U.S.A
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Pawelczyk J, Fanourgiakis I, Feil S, Siebold R. Significant improvements in clinical outcome measures and patient satisfaction after combined all-arthroscopic meniscal allograft transplantation and autologous chondrocyte implantation: A single-centre longitudinal study. Knee Surg Sports Traumatol Arthrosc 2024; 32:78-88. [PMID: 38226734 DOI: 10.1002/ksa.12023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 12/01/2023] [Indexed: 01/17/2024]
Abstract
PURPOSE The optimal treatment approach for the complex pathology of meniscal insufficiency and coexisting full-thickness cartilage defects remains unclear. The purpose of this study was to evaluate the viability, safety, and efficacy of this combined surgical approach at medium-term follow-up. METHODS This is a single-centre longitudinal study with blinded outcome assessment. All consecutive patients treated with combined all-arthroscopic meniscal allograft transplantation (MAT) with bone bridge fixation and ACI using chondrospheres at our institution between 2001 and 2021 were eligible for inclusion. Twenty patients with an average follow-up of 72.6 ± 34.4 months were included in the statistical analysis. Clinical outcomes were assessed pre- and postoperatively using the IKDC Subjective Knee Form, Lysholm Score, Tegner Activity Scale, KOOS, and Visual Analog Scale (VAS) for patient satisfaction. Failure and reoperation rates were assessed, and cartilage regeneration tissue was evaluated on postoperative MRI. RESULTS IKDC scores significantly improved from 52.1 ± 16.9 to 68.5 ± 16.3 (p = 0.003). Lysholm scores improved from 61.5 ± 21.7 to 78.5 ± 12.9 (p = 0.004). Tegner scores improved from 3.5 (1-4) to 4.0 (2-6) (p = 0.014). KOOS scores improved significantly across all subcategories, except 'symptoms', where improvements did not reach statistical significance. VAS for overall patient satisfaction showed improvements but did not reach statistical significance. The combined procedure was successful in 17 patients (85%). Eight patients had to undergo reoperation (40%), comprising mostly small, arthroscopic procedures. Seven reoperations were directly attributable to meniscal allograft transplantation (46.7%). Postoperative Magnetic Resonance Observation of Cartilage Repair Tissue scores were 68.9 ± 16.8 (n = 14). CONCLUSION Combined arthroscopic MAT and autologous chondrocyte implantation (ACI) is a viable, safe, and effective treatment approach for younger patients with meniscal insufficiency and coexisting full-thickness cartilage damage, where alternative treatment options are limited. The combined surgical procedure achieved significant improvements in clinical outcome measures and patient satisfaction with acceptable failure and high arthroscopic reoperation rates. MAT is the limiting part of this combined procedure, with most failures and reoperations being attributable to MAT, as opposed to ACI. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
| | | | - Sven Feil
- International Center for Orthopedics, ATOS Clinic, Heidelberg, Germany
| | - Rainer Siebold
- International Center for Orthopedics, ATOS Clinic, Heidelberg, Germany
- Institute for Anatomy and Cell Biology, Ruprecht-Karls-University, Heidelberg, Germany
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Allegra F, Picchi A, Ratano M, Gumina S, Fidanza A, Logroscino G. Microfracture- and Xeno-Matrix-Induced Chondrogenesis for Treatment of Focal Traumatic Cartilage Defects of the Knee: Age-Based Mid-Term Results. Healthcare (Basel) 2023; 11:2995. [PMID: 37998487 PMCID: PMC10671418 DOI: 10.3390/healthcare11222995] [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: 09/28/2023] [Revised: 11/14/2023] [Accepted: 11/18/2023] [Indexed: 11/25/2023] Open
Abstract
The aim of this study was to investigate clinical and instrumental outcomes of the autologous matrix-induced chondrogenesis (AMIC) technique for the treatment of isolated traumatic condyle and femoropatellar cartilage lesions. A total of 25 patients (12 males, 13 females, mean age 47.3 years) treated between 2018 and 2021 were retrospectively reviewed and subdivided into two groups based on age (Group A, age < 45 years; Group B, age > 45 years). A clinical evaluation was performed using the International Knee Documentation Committee (IKDC), Lysholm score and Visual Analogue Score (VAS). Cartilage regeneration was evaluated via magnetic resonance (1.5 Tesla) and classified according to a Magnetic resonance Observation of CArtilage Repair Tissue (MOCART) scoring system. At a minimum follow-up of 2 years, Group A patients obtained greater instrumental results in comparison to group B: in fact, the MOCART score was statistically significantly correlated with IKDC (r = 0.223) (p < 0.001) exclusively in group A. Nevertheless, a significant improvement in clinical functionality was shown in Group B (p < 0.001), demonstrating that this technique is safe, reproducible and capable of offering satisfactory clinical results regardless of age.
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Affiliation(s)
| | - Aurelio Picchi
- Unit of Orthopaedics, Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy (G.L.)
| | - Marco Ratano
- Unit of Orthopaedics, Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy (G.L.)
| | - Stefano Gumina
- Department of Anatomy, Histology, Legal Medicine and Orthopaedics, Polo Pontino, Sapienza University of Rome, 00161 Rome, Italy
| | - Andrea Fidanza
- Unit of Orthopaedics, Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy (G.L.)
| | - Giandomenico Logroscino
- Unit of Orthopaedics, Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy (G.L.)
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Runer A, Ossendorff R, Öttl F, Stadelmann VA, Schneider S, Preiss S, Salzmann GM, Hax J. Autologous minced cartilage repair for chondral and osteochondral lesions of the knee joint demonstrates good postoperative outcomes and low reoperation rates at minimum five-year follow-up. Knee Surg Sports Traumatol Arthrosc 2023; 31:4977-4987. [PMID: 37634136 PMCID: PMC10598129 DOI: 10.1007/s00167-023-07546-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 08/09/2023] [Indexed: 08/29/2023]
Abstract
PURPOSE Minced cartilage is a one-step, autologous procedure with promising short-term results. The aim of the present study was to evaluate mid-term results in a patient cohort with chondral and osteochondral lesions in the knee joint treated with minced cartilage. METHODS From 2015 through 2016, a total of 34 consecutive patients were treated with a single-step, autologous minced cartilage for knee chondral and osteochondral lesions. Numeric analogue scale (NAS) for pain and knee function were obtained prior to surgery and at 12, 24 and 60 months postoperatively. Secondary outcomes, including Lysholm score, Tegner activity score, and the International Knee Documentation Committee (IKDC) score, were recorded at final follow-up. MRI examinations of patients with unplanned radiological follow-up were analysed using the MOCART (Magnetic Resonance Observation of Cartilage Repair Tissue) score. RESULTS A total of 28 patients (44.1% females, age at surgery: 29.5 ± 11.5 years) were available at a mean follow-up of 65.5 ± 4.1 months. Mean defect size was 3.5 ± 1.8 cm2. NAS for pain decreased from a median of 7 (range: 2-10) preoperatively to 2 (0-8) postoperatively. NAS knee function improved from a median of 7 (range: 2-10) to 3 (0-7) after five years, respectively. Satisfactory Lysholm (76.5 ± 12.5), IKDC (71.6 ± 14.8) and Tegner activity (4, range 3-9) scores were reported at final follow-up. Of all patients, 21(75%) and 19 (67.9%) reached or exceeded the PASS for the IKDC- and Lysholm score at final follow-up, respectively. The average overall MOCART 2.0 scores for all postoperatively performed MRIs (n = 23) was 62.3 ± 17.4. Four (14.2%) postoperative complications were directly linked to minced cartilage, one (3.5%) of which required revision surgery. CONCLUSION One-step, autologous minced cartilage repair of chondral and osteochondral lesions of the knee without the necessity for subchondral bone treatment demonstrated good patient-reported outcomes, low complication rates, and graft longevity at mid-term follow-up. Minced cartilage represents a viable treatment option to more traditional cartilage repair techniques even in mid-term. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Armin Runer
- Department of Sports Orthopaedics, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Str. 22, 81675, Munich, Germany.
| | - Robert Ossendorff
- Department for Orthopaedics and Trauma, University Hospital Bonn, Bonn, Germany
| | - Felix Öttl
- Department of Hip and Knee Surgery, Schulthess Klinik, Zurich, Switzerland
| | | | | | - Stefan Preiss
- Department of Hip and Knee Surgery, Schulthess Klinik, Zurich, Switzerland
| | - Gian M Salzmann
- Department of Hip and Knee Surgery, Schulthess Klinik, Zurich, Switzerland
| | - Jakob Hax
- Department of Hip and Knee Surgery, Schulthess Klinik, Zurich, Switzerland
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Kraeutler MJ, McCulloch PC, Sherman SL, Vidal AF. The Principles of Knee Joint Preservation: Operative Treatment Strategies. J Bone Joint Surg Am 2023; 105:1638-1646. [PMID: 37616413 DOI: 10.2106/jbjs.23.00212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
➤ Joint alignment, meniscal status, and ligament stability are codependent factors involved in knee joint preservation, and any injury or imbalance can impact the knee articular cartilage status and can result in adverse clinical outcomes.➤ Cartilage preservation procedures in the knee will not result in optimal outcomes if there is joint malalignment, meniscal deficiency, or ligamentous instability.➤ Lower-extremity varus or valgus malalignment is a risk factor for the failure of an anterior cruciate ligament (ACL) reconstruction. It represents an indication for a high tibial osteotomy or distal femoral osteotomy in the setting of failed ACL reconstruction, and may even be considered in patients who have an initial ACL injury and severe malalignment.➤ An elevated posterior tibial slope increases the risk of failure of ACL reconstruction, whereas a decreased posterior tibial slope increases the risk of failure of posterior cruciate ligament reconstruction.
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Affiliation(s)
- Matthew J Kraeutler
- Department of Orthopedics & Sports Medicine, Houston Methodist Hospital, Houston, Texas
| | - Patrick C McCulloch
- Department of Orthopedics & Sports Medicine, Houston Methodist Hospital, Houston, Texas
| | - Seth L Sherman
- Department of Orthopedic Surgery, Stanford University, Redwood City, California
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Αnatolitou A, Μavrogenis AF, Sideri KI, Psalla D, Krystalli AA, Prassinos NN. Comparison of allogeneic mesenchymal stem cells therapeutic potentials in rabbits' cartilage defects: Μacroscopic and histological outcomes. Res Vet Sci 2023; 162:104948. [PMID: 37478792 DOI: 10.1016/j.rvsc.2023.104948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/12/2023] [Accepted: 07/01/2023] [Indexed: 07/23/2023]
Abstract
Mesenchymal stem cells are safe and effective for treating joint injuries. However, the most suitable cell source remains controversial. This randomized controlled, double-blind study aimed to evaluate the potentials of rabbit allogeneic bone marrow- (BMSCs), adipose- (ASCs) and synovial membrane- (SDSCs) derived stem cells encapsulated in fibrin glue (FG) in vivo. The therapeutic properties of fibrin glue in critical-sized osteochondral defects (ODs) were also investigated. A 3 × 3 mm-sized OD was created in the femoral patellar groove on both knees of New Zealand rabbits, except from the left knees of the control group in which the OD was 2 × 3mm. The rabbits were randomly divided into four groups (right/left knee): 3 × 3 mm / 2 × 3 mm-sized OD control group, FG/FG with ASCs group, FG/FG with BMSCs group, FG/FG with SDSCs group. The International Cartilage Repair Society (ICRS) and the O'Driscoll scales were used to evaluate tissue characteristics after 12 weeks. FG promoted the production of reparative tissue with superior macroscopic features. Allogeneic MSCs combined with FG improved the macroscopic and histological scores more than the FG groups. The tissue in the SDSCs group was macroscopically and histologically better than the ASCs and BMSCs groups. The ICRS score differed among the SDSCs and the ASCs groups, while the empty critical-sized ODs were filled with inferior tissue compared to smaller ones. The preclinical feasibility of stem cells for OD regeneration in rabbits and the osteochondrogenic superiority of SDSCs was demonstrated. Additional tests and extended studies are required to reassure the long-term safety of these findings.
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Affiliation(s)
- A Αnatolitou
- Surgery & Obstetrics Unit, Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University, Thessaloniki, Greece.
| | - A F Μavrogenis
- National and Kapodistrian University of Athens, First Department of Orthopaedics, School of Medicine, Athens, Greece
| | - K I Sideri
- Surgery Clinic, School of Veterinary Medicine, University of Thessaly, Karditsa, Greece
| | - D Psalla
- Laboratory of Pathology, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University, Thessaloniki, Greece
| | - A A Krystalli
- Surgery & Obstetrics Unit, Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University, Thessaloniki, Greece
| | - N N Prassinos
- Surgery & Obstetrics Unit, Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University, Thessaloniki, Greece
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Niemeyer P, Angele P, Spiro RC, Kirner A, Gaissmaier C. Comparison of Hydrogel-Based Autologous Chondrocyte Implantation Versus Microfracture: A Propensity Score Matched-Pair Analysis. Orthop J Sports Med 2023; 11:23259671231193325. [PMID: 37655236 PMCID: PMC10467419 DOI: 10.1177/23259671231193325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 05/04/2023] [Indexed: 09/02/2023] Open
Abstract
Background Few studies exist for large defects comparing matrix-associated autologous chondrocyte implantation (M-ACI) with other cartilage repair methods due to the limited availability of suitable comparator treatments. Purpose To compare the clinical efficacy of a novel hydrogel-based M-ACI method (NOVOCART Inject plus) versus microfracture (MFx) in patients with knee cartilage defects. Study Design Cohort study; Level of evidence, 3. Methods Propensity score matched-pair analysis was used to compare the 24-month outcomes between the M-ACI treatment group from a previous single-arm phase 3 study and the MFx control group from another phase 3 study. Patients were matched based on preoperative Knee injury and Osteoarthritis Outcomes Score (KOOS), symptom duration, previous knee surgeries, age, and sex, resulting in 144 patients in the matched-pair set (72 patients per group). The primary endpoint was the change in least-squares means (ΔLSmeans) for the KOOS from baseline to the 24-month assessment. Results Defect sizes in the M-ACI group were significantly larger than in the MFx group (6.4 versus 3.7 cm2). Other differences included defect location (no patellar or tibial defects in the MFx group), number of defects (33.3% with 2 defects in the M-ACI group versus 9.7% in the MFx group), and defect cause (more patients with degenerative lesions in the M-ACI group). The M-ACI group had higher posttreatment KOOS (M-ACI versus MFX: 81.8 ± 16.8 versus 73.0 ± 20.6 points) and KOOS ΔLSmeans from baseline to 24 months posttreatment (M-ACI versus MFX: 36.9 versus 26.9 points). Treatment contrasts in KOOS ΔLSmeans from baseline indicated statistical significance in favor of M-ACI from 3 to 24 months posttreatment (P = .0026). Significant and clinically meaningful differences in favor of M-ACI at 24 months were also found regarding International Knee Documentation Committee (IKDC) score ΔLSmeans from baseline (37.8 versus 30.4 points; P = .0334), KOOS responder rates at 24 months (≥10-point improvement from baseline; 94.4% versus 65.3%; P < .0001), IKDC responder rates at 24 months (>20.5-point improvement from baseline; 83.3% versus 61.1%, P = .0126) and MOCART (Magnetic Resonance Observation of Cartilage Repair Tissue) score in a subgroup of patients (LS means, 86.9 versus 69.1; P = .0096). Conclusion In this exploratory analysis, M-ACI using an in situ crosslinked hydrogel demonstrated superior clinical and structural (MOCART) 24-month outcomes compared with MFx in patients with knee cartilage defects.
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Affiliation(s)
- Philipp Niemeyer
- OCM Orthopädische Chirurgie München, Munich, Germany
- Department of Orthopedics and Trauma Surgery, University Medical Center Freiburg, Albert Ludwig University of Freiburg, Freiburg, Germany
| | - Peter Angele
- Sporthopaedicum Regensburg, Regensburg, Germany
- Department of Trauma Surgery, University Medical Centre Regensburg, Germany
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Bangert Y, Zarembowicz P, Engelleiter K, Gkarilas E, Schmitt H, Renkawitz T, Jaber A. Long-Term Outcome and Athletic Level following Operative Treatment for Osteochondritis Dissecans of the Knee in Pediatric and Adolescent Patients. J Clin Med 2023; 12:4140. [PMID: 37373833 DOI: 10.3390/jcm12124140] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/05/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
Research on the long-term outcomes following surgical therapy for osteochondritis dissecans (OCD) of the knee is scarce. A single-center retrospective cohort study was conducted to investigate surgically treated patients for knee OCD between 1993 and 2007. A total of 37 patients with an average follow-up duration of 14 years (range 8-18) were in the final cohort. IKDC and Lysholm scores were assessed. The duration and types of sport activity were reported. Long-term results were compared with existing midterm data. Knee scores showed a very good outcome with a mean of 91.3 in the IKDC score and 91.7 in the Lysholm score. Compared to midterm outcomes, both IKDC (p = 0.028) and Lysholm scores (p = 0.01) improved on final follow-up. Patients with open physes showed a significantly better Lysholm score compared to patients with closed physes (p = 0.034). Defect localization and size did not influence the outcome, but a defect depth of <0.8 cm2 achieved significantly better scores than ≥0.8 cm2. Of all surgical interventions, refixation achieved the best outcome. Long-term results significantly improved compared to midterm results with a follow-up of 40 months (p = 0.01). Thirty-six out of 37 patients were physically active, with 56% of sports being knee-straining activities. Long-term results following surgically treated OCD fragments show excellent function and a good athletic level. Patients with open physes potentially have better knee outcomes. Midterm results are sustainable and could improve further in the long term.
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Affiliation(s)
- Yannic Bangert
- Department of Orthopaedics, Heidelberg University Hospital, 69118 Heidelberg, Germany
| | - Patrick Zarembowicz
- Department for Orthopaedic and Trauma Surgery, BG Klinik Ludwigshafen, 67071 Ludwigshafen am Rhein, Germany
| | - Karoly Engelleiter
- Department for Orthopaedic and Trauma Surgery, Helios Clinic, 75175 Pforzheim, Germany
| | - Evangelos Gkarilas
- Department for Orthopaedics, Trauma and Spinal Surgery, Neckar-Odenwald Clinics, 74821 Mosbach, Germany
| | - Holger Schmitt
- German Joint Center, ATOS Clinic Heidelberg, 69115 Heidelberg, Germany
| | - Tobias Renkawitz
- Department of Orthopaedics, Heidelberg University Hospital, 69118 Heidelberg, Germany
| | - Ayham Jaber
- Department of Orthopaedics, Heidelberg University Hospital, 69118 Heidelberg, Germany
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McKeithan LJ, Lameire DL, Tagliero AJ, Chahal J, Gwathmey FW, Lee CA. What's New in Sports Medicine. J Bone Joint Surg Am 2023; 105:582-590. [PMID: 36853964 DOI: 10.2106/jbjs.22.01385] [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: 03/02/2023]
Affiliation(s)
- Lydia J McKeithan
- Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, California
| | - Darius L Lameire
- Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Adam J Tagliero
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia
| | - Jaskarndip Chahal
- University of Toronto Orthopaedic Sports Medicine, Women's College Hospital, Toronto, Ontario, Canada
| | - F Winston Gwathmey
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia
| | - Cassandra A Lee
- Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, California
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Angele P, Zellner J, Schröter S, Flechtenmacher J, Fritz J, Niemeyer P. Biological Reconstruction of Localized Full-Thickness Cartilage Defects of the Knee: A Systematic Review of Level 1 Studies with a Minimum Follow-Up of 5 Years. Cartilage 2022; 13:5-18. [PMID: 36250517 PMCID: PMC9924981 DOI: 10.1177/19476035221129571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVE The objective of this study was to evaluate the best available mid- to long-term evidence of surgical procedures for the treatment of localized full-thickness cartilage defects of the knee. DESIGN Systematic review using Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines of Level 1 randomized clinical trials (RCTs), meta-analyses of RCTs and systematic reviews with a minimum follow-up of 5 years. Data extracted included patient demographics, defect characteristics, clinical and radiological outcomes, as well as treatment failures. RESULTS Six RCTs and 3 Level 1 systematic reviews were included. Two RCTs compared microfracture (MFx) to periosteum-covered autologous chondrocyte implantation (ACI-P), 1 to matrix-associated ACI (M-ACI) and 2 to osteochondral autograft transplantation (OAT). One study compared OAT to collagen membrane covered ACI (ACI-C). The 3 Level 1 systematic reviews/meta-analyses assessed the outcome of MFx, OAT, and various ACI methods in RCTs. OAT showed significantly better outcomes compared with MFx. In the 2 RCTs comparing ACI-P and MFx, no significant differences in clinical outcomes were seen, whereas significantly better outcomes were reported for M-ACI versus MFx in 1 study including patients with larger defects (5 cm2), and for ACI-C versus OAT in terms of Cincinnati Score. Higher failure rates were reported for MFx compared with OAT and for OAT compared with ACI-C, while no significant differences in failure rates were observed for ACI-P compared to MFx. CONCLUSION Restorative cartilage procedures (ACI-C or M-ACI and OAT) are associated with better long-term clinical outcomes including lower complication and failure rates when compared with reparative techniques (MFx). Among the restorative procedures, OAT seems to be inferior to ACI especially in larger defects after longer follow-up periods. LEVEL OF EVIDENCE Level I: Systematic review of Level I studies.
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Affiliation(s)
- Peter Angele
- Sporthopaedicum Regensburg, Regensburg,
Germany,Klinik für Unfall- und
Wiederherstellungschirurgie, Universitätsklinikum Regensburg, Regensburg,
Germany,Peter Angele, Sporthopaedicum Regensburg,
Hildegard-von-Bingen-Strasse 1, 93053 Regensburg, Germany.
| | | | - Steffen Schröter
- Abteilung für Unfall- und
Wiederherstellungschirurgie, Jung-Stilling Krankenhaus, Diakonie Klinikum GmbH,
Siegen, Germany
| | | | - Jürgen Fritz
- Orthopädisch Chirurgisches Centrum,
Tübingen, Germany
| | - Philipp Niemeyer
- OCM—Orthopädische Chirurgie München,
München, Germany,Klinik für Orthopädie und
Traumatologie, Universitätsklinikum Freiburg, Freiburg, Germany
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18
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Dhillon J, Fasulo SM, Kraeutler MJ, Belk JW, McCulloch PC, Scillia AJ. The Most Common Rehabilitation Protocol After Matrix-Assisted Autologous Chondrocyte Implantation Is Immediate Partial Weight-Bearing and Continuous Passive Motion. Arthrosc Sports Med Rehabil 2022; 4:e2115-e2123. [PMID: 36579035 PMCID: PMC9791827 DOI: 10.1016/j.asmr.2022.09.007] [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: 04/03/2022] [Accepted: 09/06/2022] [Indexed: 11/19/2022] Open
Abstract
Purpose To perform a systematic review of postoperative rehabilitation protocols for third-generation autologous chondrocyte implantation (ACI) of the knee joint. Methods A systematic review was performed by searching PubMed, Cochrane Library, and EMBASE to locate randomized controlled trials that described a rehabilitation protocol following third-generation ACI of the knee joint. The search terms used were: "autologous" AND "chondrocyte" AND "randomized". Data extracted from each study included various components of postoperative rehabilitation, such as initial weight-bearing (WB) status and time to full WB, the use of continuous passive motion (CPM), the time to return to sports, and physical therapy (PT) modalities used and the timing of their initiation. Results Twenty-five studies (22 Level I, 3 Level II) met inclusion criteria, including a total of 905 patients undergoing treatment with ACI. The average patient age ranged from 29.1 to 54.8 years, and the mean follow-up time ranged from 3 months to 10.0 years. The average lesion size ranged from 1.9 to 5.8 cm2, and the most common lesion location was the medial femoral condyle (n = 494). Twenty studies allowed partial WB postoperatively with all studies permitting full WB within 12 weeks. Twenty studies used CPM in their rehabilitation protocols and initiated its use within 24 hours postoperatively. Among 10 studies that reported time to return to sport, 9 (90%) allowed return by 12 months. While most protocols used strength training as well as the inclusion of proprioceptive training, there was disagreement on the timing and inclusion of specific PT modalities used during the rehabilitation process. Conclusions Based on the included studies, most rehabilitation protocols for third-generation ACI initiate CPM within 24 hours postoperatively and allow partial WB immediately following surgery with progression to full WB within 12 weeks. There is variation of the PT modalities used as well as the timing of their initiation. Level of Evidence Level II, systematic review of Level I-II studies.
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Affiliation(s)
- Jaydeep Dhillon
- Rocky Vista University College of Osteopathic Medicine, Parker, Colorado U.S.A
| | - Sydney M. Fasulo
- Department of Orthopaedic Surgery, St. Joseph’s University Medical Center, Paterson, New Jersey U.S.A
| | - Matthew J. Kraeutler
- Department of Orthopedics & Sports Medicine, Houston Methodist Hospital, Houston, Texas U.S.A.,Address correspondence to Matthew J. Kraeutler, M.D., Department of Orthopedics & Sports Medicine, Houston Methodist Hospital, 6445 Main St., Suite 2300, Houston, TX 77030.
| | - John W. Belk
- University of Colorado School of Medicine, Aurora, Colorado U.S.A
| | - Patrick C. McCulloch
- Department of Orthopedics & Sports Medicine, Houston Methodist Hospital, Houston, Texas U.S.A
| | - Anthony J. Scillia
- Department of Orthopaedic Surgery, St. Joseph’s University Medical Center, Paterson, New Jersey U.S.A.,Academy Orthopaedics, Wayne, New Jersey, U.S.A
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