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Schafer KA, Cusworth BM, Kazarian GS, Backus JD, Klein SE, Johnson JE, McCormick JJ. Outcomes Following Repeat Ankle Arthroscopy and Microfracture for Osteochondral Lesions of the Talus. Foot Ankle Spec 2024; 17:216-223. [PMID: 35249397 DOI: 10.1177/19386400221079203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The management of symptomatic osteochondral lesions of the talus (OLTs) previously treated with arthroscopy is controversial. Minimal data exist on the role for repeat arthroscopy. Here, we describe our experience with repeat arthroscopy and microfracture for symptomatic OLTs. METHODS Our database was queried over an 8-year period to identify patients undergoing repeat arthroscopy and microfracture as treatment for symptomatic OLTs. Phone surveys were conducted to assess residual pain, patient satisfaction, and need for subsequent surgery. We compared patient outcomes based on the size of their OLT (small lesions ≤150 mm2, large >150 mm2) and the presence or absence of subchondral cysts. RESULTS We identified 14 patients who underwent repeat arthroscopy and microfracture for symptomatic OLTs. Patients reported reasonable satisfaction (7.6 ± 3.5 out of 10) but moderate residual pain (4.7 ± 3.4 out of 10) at midterm follow-up (5.1 ± 2.9 years). In total, 21% (3/14) of patients had undergone subsequent surgery. Patients with small (n = 5) and large OLTs (n = 9) had similar postoperative pain scores (4.2 ± 4.1 vs 4.9 ± 3.2) and postoperative satisfaction levels (6.4 ± 4.9 vs 8.3 ± 2.5). CONCLUSION At midterm follow-up, repeat arthroscopy for symptomatic OLTs demonstrated reasonable satisfaction but moderate residual pain. Lesion size or presence of subchondral cysts did not affect outcome, but our sample size was likely too small to detect statistically significant differences. These data show that repeat ankle arthroscopy can be performed safely with modest outcomes, and we hope that this report aids in managing patient expectations.Level of Evidence: Level IV Case Series.
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Affiliation(s)
- Kevin A Schafer
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri
| | - Brian M Cusworth
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri
| | - Gregory S Kazarian
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri
| | - Jonathon D Backus
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri
| | - Sandra E Klein
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri
| | - Jeffrey E Johnson
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri
| | - Jeremy J McCormick
- Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri
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Huang M, Li Y, Liao C, Lai Q, Peng J, Guo N. Microfracture surgery combined with platelet-rich plasma injection in treating osteochondral lesions of talus: A system review and update meta analysis. Foot Ankle Surg 2024; 30:21-26. [PMID: 37730459 DOI: 10.1016/j.fas.2023.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 08/29/2023] [Accepted: 09/02/2023] [Indexed: 09/22/2023]
Abstract
BACKGROUND To systematically evaluate the efficacy of arthroscopic microfracture surgery combined with platelet-rich plasma (PRP) injection in treating osteochondral lesions of talus (OLT). METHOD A computer-based search of the PubMed, EMbase, Cochrane Library was developed. The search time was dated in December 2022. Randomized controlled trials and prospective case control studies comparing the treatment of OLT with microfracture surgery combined with PRP injection and microfracture surgery alone were included. The quality of the literatures were evaluated. Meta analysis was completed using the data of postoperative pain and function scores of the ankle joint reported in the literature. RESULTS Five randomized controlled trials with a total of 198 patients were included. Compared with microfracture surgery alone, meta-analysis showed that the postoperative visual analogue scale (VAS) score for ankle pain was significantly lower (P < 0.001), and the American Orthopaedic Foot and Ankle Society score (AOFAS) was significantly better ( P < 0.001) in the group of microfracture surgery combined with PRP injection. The change of VAS and AOFAS was also significantly better in the group of microfracture surgery combined with PRP injection (P < 0.001). CONCLUSION Arthroscopic microfracture surgery combined with PRP injection in treating OLT can significantly reduce pain and improve ankle function. More long-term follow-up, high-quality studies are needed. LEVEL OF EVIDENCE II.
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Affiliation(s)
- Mengquan Huang
- Department of Orthopaedics, Air Force Hospital of Southern Theater Command of PLA, Guangzhou 510602, Guangdong Province, China.
| | - Yubiao Li
- Department of Orthopaedics, Air Force Hospital of Southern Theater Command of PLA, Guangzhou 510602, Guangdong Province, China
| | - Chunlai Liao
- Department of Orthopaedics, Air Force Hospital of Southern Theater Command of PLA, Guangzhou 510602, Guangdong Province, China
| | - Qiulian Lai
- Department of Orthopaedics, Air Force Hospital of Southern Theater Command of PLA, Guangzhou 510602, Guangdong Province, China
| | - Jun Peng
- Department of Orthopaedics, Air Force Hospital of Southern Theater Command of PLA, Guangzhou 510602, Guangdong Province, China
| | - Naiming Guo
- Department of Orthopaedics, Air Force Hospital of Southern Theater Command of PLA, Guangzhou 510602, Guangdong Province, China
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3
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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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Casciato D, Zulauf E, Steginsky B. Use of Small Joint Arthroscopy for Diagnosis and Treatment of a First Metatarsal Head Osteochondral Defect: A Case Report. JBJS Case Connect 2022; 12:01709767-202212000-00009. [PMID: 36240292 DOI: 10.2106/jbjs.cc.22.00276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 08/12/2022] [Indexed: 02/24/2023]
Abstract
CASE A case of a painful first metatarsophalangeal joint in a 28-year-old woman is reported. Clinical examination and imaging were suspicious for osteochondral lesion of the first metatarsal head. A 1.9-mm arthroscope was used for diagnosis and treatment of an osteochondral defect with microfracture and dehydrated, micronized allogenic cartilage application with an excellent postoperative outcome. CONCLUSION From the 3-month through 1-year follow-up, the patient continued a pain-free return to normal function. This case suggests that arthroscopy is as a viable approach to resurfacing osteochondral lesions of the big toe joint.
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Nakasa T, Ikuta Y, Sumii J, Nekomoto A, Kawabata S, Adachi N. Clinical Outcomes of Osteochondral Fragment Fixation Versus Microfracture Even for Small Osteochondral Lesions of the Talus. Am J Sports Med 2022; 50:3019-3027. [PMID: 35901505 DOI: 10.1177/03635465221109596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The bone marrow stimulation (BMS) technique is performed for osteochondral lesions of the talus (OLTs) with a lesion size of <100 mm2. The lesion defect is covered with fibrocartilage, and the clinical outcomes deteriorate over time. In contrast, the osteochondral fragment fixation can restore the native articular surface. The difference in clinical outcomes between these procedures is unclear. PURPOSE To compare the clinical outcomes of BMS and osteochondral fragment fixation for OLTs and examine the characteristics of patients with poor clinical outcomes of BMS. STUDY DESIGN Cohort study; Level of evidence, 3. METHODS In total, 62 ankles in 59 patients with OLTs were included. BMS was performed for 26 ankles, and fixation was performed for 36 ankles. Clinical outcomes, including the American Orthopaedic Foot & Ankle Society (AOFAS) Ankle Hindfoot Scale and bone marrow edema (BME) as identified on magnetic resonance imaging, were compared between the 2 groups. On computed tomography scans, the lesion location was compared with or without BME in each group. RESULTS The AOFAS scores in the fixation group (97.3 ± 4.3 points) were significantly higher than those in the BMS group (91.3 ± 7.7 points), even when the lesion size was <100 mm2 (P < .05). When comparing the ankles with or without BME in each group, the AOFAS scores at the final follow-up were significantly lower for the ankles with BME (88.6 ± 7.8 points) than for those without BME (95.0 ± 6.1 points) in the BMS group (P < .05). Lesions with BME in the sagittal plane were located more centrally than those without BME in the BMS group. In the fixation group, there were no significant differences in AOFAS scores and location of the lesion in ankles with or without BME. CONCLUSION The clinical outcomes of osteochondral fragment fixation are superior to those of BMS in OLTs, even for lesions sized <100 mm2. Fixation is recommended even for small lesions, especially for more centralized lesions in the medial and lateral sides of the talus.
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Affiliation(s)
- Tomoyuki Nakasa
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Yasunari Ikuta
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Junichi Sumii
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akinori Nekomoto
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shingo Kawabata
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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6
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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: 3] [Impact Index Per Article: 1.5] [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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Management of Treatment Failures in Osteochondral Lesions of the Talus. Foot Ankle Clin 2022; 27:385-399. [PMID: 35680295 DOI: 10.1016/j.fcl.2021.12.002] [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: 02/02/2023]
Abstract
Osteochondral lesions of the talus are a common result of traumatic ankle injury. Due to the low success rates of nonoperative management, surgical management of osteochondral lesions of the talus (OLTs) has evolved considerably over the past decade as more outcomes research has emerged, new techniques have been described, and we have developed a better understanding of the role of biologics in the treatment algorithm. We describe, in sequence, the surgical management options, including salvage procedures, for failed treatment of OLTs.
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8
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Guyton GP. CORR Insights®: Should Arthroscopic Bone Marrow Stimulation Be Used in the Management of Secondary Osteochondral Lesions of the Talus? A Systematic Review. Clin Orthop Relat Res 2022; 480:1126-1128. [PMID: 35348551 PMCID: PMC9263493 DOI: 10.1097/corr.0000000000002189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 03/07/2022] [Indexed: 01/31/2023]
Affiliation(s)
- Gregory P Guyton
- Orthopaedic Surgeon, MedStar Union Memorial Hospital, Baltimore, MD, USA
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Rayes J, Sparavalo S, Wong I. Biological Augments for Acetabular Chondral Defects in Hip Arthroscopy-A Scoping Review of the Current Clinical Evidence. Curr Rev Musculoskelet Med 2021; 14:328-339. [PMID: 34778917 PMCID: PMC8733143 DOI: 10.1007/s12178-021-09721-8] [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] [Accepted: 09/19/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE OF REVIEW A wide array of joint-preserving surgical techniques exists in the management of acetabular chondral defects (ACDs). The purpose of this review is to summarize the clinical outcomes of the recent biologics used to treat ACDs during hip arthroscopy. RECENT FINDINGS Increasing evidence is available for different biological solutions used in the hip. Studies have shown promising outcomes with minimal complications when using biologics as augmentation to microfracture (MF), including different scaffolds or stem cells, or to enhance autologous chondrocyte implantation (ACI). However, data so far is scarce, and more trials and longer follow-ups are needed to better delineate the appropriate indications and benefits for each technique. Presently, the level of evidence is low, but in general, biologics appear safe and trend toward beneficial compared to standard surgical techniques. Augmented MF is recommended for small to medium ACDs, and matrix-assisted ACI or three-dimensional ACI is recommended for medium to large defects.
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Affiliation(s)
- Johnny Rayes
- Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, Dalhousie University, 5955 Veteran's Memorial Lane, Room 2106 VMB, Halifax, Nova Scotia, B3H 2E1, Canada
| | - Sara Sparavalo
- Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, Dalhousie University, 5955 Veteran's Memorial Lane, Room 2106 VMB, Halifax, Nova Scotia, B3H 2E1, Canada
| | - Ivan Wong
- Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, Dalhousie University, 5955 Veteran's Memorial Lane, Room 2106 VMB, Halifax, Nova Scotia, B3H 2E1, Canada.
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10
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Lan T, McCarthy HS, Hulme CH, Wright KT, Makwana N. The management of talar osteochondral lesions - Current concepts. JOURNAL OF ARTHROSCOPY AND JOINT SURGERY 2021; 8:231-237. [PMID: 34337329 PMCID: PMC8312263 DOI: 10.1016/j.jajs.2021.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 11/17/2022]
Abstract
Osteochondral lesions of the talus (OLTs) are a common complication following trauma, involving both the articular cartilage and the underlying subchondral bone, with variable aetiologies and often presenting with non-specific symptoms. Diagnosis of OLTs requires a combination of clinical assessment and imaging and despite many different treatment options, there is no generalised consensus regarding which option is the most effective. Left untreated, OLTs risk progressing to osteoarthritis. Acute non-displaced OLTs can be treated non-operatively. However, OLTs refractory to non-surgical care for three to six months may be suitable for surgical care. In these cases, conservative treatments are often unsuccessful, particularly for larger and more severe defects and so the majority require surgical intervention. Although bone marrow stimulation techniques remain the "gold standard" for lesions <150 mm2, there still requires a need for better long term clinical data and cost-benefit analyses compared with other treatment options. Biological attempts at either regenerating or replacing the articular cartilage are however demonstrating some promising results, but each with their own advantages and disadvantages. In this review, we summarise the clinical management of OLTs and present the current concepts of different treatment regimes.
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Affiliation(s)
- Tian Lan
- Spinal Studies & Cartilage Research Group, Robert Jones and Agnes Hunt Orthopaedic Hospital, NHS Trust, Oswestry, UK
- School of Pharmacy and Bioengineering, Keele University, UK
| | - Helen S. McCarthy
- Spinal Studies & Cartilage Research Group, Robert Jones and Agnes Hunt Orthopaedic Hospital, NHS Trust, Oswestry, UK
- School of Pharmacy and Bioengineering, Keele University, UK
| | - Charlotte H. Hulme
- Spinal Studies & Cartilage Research Group, Robert Jones and Agnes Hunt Orthopaedic Hospital, NHS Trust, Oswestry, UK
- School of Pharmacy and Bioengineering, Keele University, UK
| | - Karina T. Wright
- Spinal Studies & Cartilage Research Group, Robert Jones and Agnes Hunt Orthopaedic Hospital, NHS Trust, Oswestry, UK
- School of Pharmacy and Bioengineering, Keele University, UK
| | - Nilesh Makwana
- Robert Jones and Agnes Hunt Orthopaedic Hospital, NHS Trust, Oswestry, UK
- School of Pharmacy and Bioengineering, Keele University, UK
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11
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Roth KE, Ossendorff R, Klos K, Simons P, Drees P, Salzmann GM. Arthroscopic Minced Cartilage Implantation for Chondral Lesions at the Talus: A Technical Note. Arthrosc Tech 2021; 10:e1149-e1154. [PMID: 33981564 PMCID: PMC8085507 DOI: 10.1016/j.eats.2021.01.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 01/10/2021] [Indexed: 02/03/2023] Open
Abstract
In the past few years, autologous chondrocyte implantation has been shown to be the most suitable cartilage reconstructive technique with the best tissue quality. Although this method is part of the standard surgical repertoire in the knee joint, it has so far not been an established method in the ankle because there are no prospective randomized controlled studies to prove a significant advantage over alternative methods of cartilage repair. The methods most frequently used in this context (e.g., marrow stimulation techniques) can, however, at most generate hyaline-like and thus biomechanically inferior regenerates. Minced cartilage implantation, on the other hand, is a relatively simple and cost-effective 1-step procedure with promising biological potential and-at least in the knee joint-satisfactory clinical results. We present an arthroscopic surgical technique by which the surgeon can apply autologous chondrocytes in a 1-step procedure (AutoCart; Arthrex, Munich, Germany) to treat articular cartilage defects in the ankle joint.
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Affiliation(s)
| | - Robert Ossendorff
- Department for Orthopaedics and Trauma, University Hospital Bonn, Bonn, Germany
| | | | | | - Philipp Drees
- Department for Orthopaedics and Trauma, University Hospital Mainz, Mainz, Germany
| | - Gian M. Salzmann
- Gelenkzentrum Rhein-Main, Hochheim, Germany
- Schulthess Clinic, Zurich, Switzerland
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12
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Lall AC, Ankem HK, Diulus SC, Maldonado DR, Meghpara MB, Rosinsky PJ, Shapira J, Domb BG. Capsular Management of the Hip During Arthroscopic Acetabular Chondral Resurfacing: Pearls, Pitfalls, and Optimal Surgical Technique. Arthrosc Tech 2021; 10:e587-e597. [PMID: 33680797 PMCID: PMC7917387 DOI: 10.1016/j.eats.2020.10.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 10/21/2020] [Indexed: 02/03/2023] Open
Abstract
Treatment of hip joint chondral damage is a well-recognized aspect of the arthroscopic management of femoroacetabular impingement syndrome. Hip chondral resurfacing has evolved from microfracture to different forms of cartilage grafting, all with variable long-term outcomes. Recent literature has focused on techniques using different cartilage sources (native and synthetic products) that are available for clinicians to choose from during hip arthroscopy. None of the published reports on cartilage grafts have commented on hip joint capsular management as part of the procedure. This is likely because of the increased difficulty of capsular closure in the dry arthroscopic environment required for graft stabilization. However, potential iatrogenic hip instability induced by an unrepaired interportal capsulotomy can be detrimental to the existing joint architecture and possibly to the cartilage graft. This article presents a step-by-step approach, including tips and pearls, for capsular closure during arthroscopic acetabular chondral resurfacing with BioCartilage (Arthrex, Naples, FL). This method is a safe and reproducible way to close the joint capsule during chondral resurfacing in patients undergoing hip preservation that can potentially enhance the chances of a successful outcome.
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Affiliation(s)
- Ajay C. Lall
- American Hip Institute Research Foundation, Chicago, Illinois, U.S.A.,American Hip Institute, Chicago, Illinois, U.S.A.,AMITA Health St. Alexius Medical Center, Hoffman Estates, Illinois, U.S.A
| | - Hari K. Ankem
- American Hip Institute Research Foundation, Chicago, Illinois, U.S.A
| | | | | | - Mitchell B. Meghpara
- American Hip Institute Research Foundation, Chicago, Illinois, U.S.A.,AMITA Health St. Alexius Medical Center, Hoffman Estates, Illinois, U.S.A
| | | | - Jacob Shapira
- American Hip Institute Research Foundation, Chicago, Illinois, U.S.A
| | - Benjamin G. Domb
- American Hip Institute Research Foundation, Chicago, Illinois, U.S.A.,American Hip Institute, Chicago, Illinois, U.S.A.,AMITA Health St. Alexius Medical Center, Hoffman Estates, Illinois, U.S.A.,Address correspondence to Benjamin G. Domb, M.D., American Hip Institute, 999 E Touhy Ave, Ste 450, Des Plaines, IL 60018, U.S.A.
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