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Schneider KN, Theil C, Gosheger G, Weller JF, Goth A, Ahlbaeumer G. Rate of Revision Surgery and Associated Risk Factors After Primary Arthroscopic ACL Repair With Additional Suture Augmentation. Orthop J Sports Med 2024; 12:23259671241244734. [PMID: 38827140 PMCID: PMC11143819 DOI: 10.1177/23259671241244734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 02/02/2024] [Indexed: 06/04/2024] Open
Abstract
Background Recent studies have suggested promising patient-reported outcomes after primary anterior cruciate ligament (ACL) repair with additional suture augmentation (SA). Purpose To evaluate the risk for revision surgery and identify patient- and injury-related risk factors after ACL repair with SA in a large patient cohort subject to strict patient selection. Study Design Case-control study; Level of evidence, 3. Methods Included were 86 patients (61 female; 93% follow-up rate) who underwent arthroscopic ACL repair with SA between January 2017 and March 2019 by a single surgeon and had a minimum follow-up of 24 months. Patients were selected for surgery with regard to time to surgery (preferably on the day of injury), tear pattern (limited to Sherman types 1 and 2), and tissue quality (intact synovial coverage). Postoperatively, the patients who needed revision surgery were identified and compared with patients who did not undergo revision surgery, using the Mann-Whitney U test for nonparametric analysis and the Student t test for parametric analysis. A Kaplan-Meier analysis was performed to investigate the survival rate of the ACL repair. Results A total of 9 patients (10%; median age, 48 years; interquartile range [IQR], 27-50 years) underwent revision surgery at 12 months postoperatively (IQR, 8-25 months). The median follow-up of patients without revision surgery was 35 months (IQR, 33-44 months). The revision-free survival rate was 97% (95% CI, 93%-100%) after 1 year, 93% (95% CI, 88%-98%) after 2 years, and 90% (95% CI, 83%-97%) after 4 years. Patient-related factors-such as sex (P = .98), age at surgery (P = .459), body mass index (P = .352), and preinjury level of sports (P = .53)-had no significant impact on the survival rate of the ACL repair. Injury-related factors-such as concomitant injuries of the medial (P = .860) and lateral menisci (P = .414) and the medial (P = .801) and lateral collateral ligaments (P = .534) or same-day surgery compared with a delay of surgery of up to 18 days (P = .277)-had no significant impact on the survival rate of the ACL repair. Conclusion The revision rate of primary ACL repair with SA at a 2-year follow-up was 10%. Patient- and injury-related factors were not associated with the survival rate of the ACL repair.
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Affiliation(s)
- Kristian Nikolaus Schneider
- Department of Orthopaedics and Trauma Surgery, Klinik Gut, St. Moritz, Switzerland
- Department of Orthopaedics and Tumor Orthopaedics, University Hospital of Münster, Münster, Germany
| | - Christoph Theil
- Department of Orthopaedics and Tumor Orthopaedics, University Hospital of Münster, Münster, Germany
| | - Georg Gosheger
- Department of Orthopaedics and Tumor Orthopaedics, University Hospital of Münster, Münster, Germany
| | - Jan Frederic Weller
- Department of Orthopaedics and Trauma Surgery, Klinik Gut, St. Moritz, Switzerland
| | - Anna Goth
- Department of Orthopaedics and Trauma Surgery, Klinik Gut, St. Moritz, Switzerland
- Department of Trauma Surgery, BG Trauma Clinic Frankfurt, Frankfurt, Germany
| | - Georg Ahlbaeumer
- Department of Orthopaedics and Trauma Surgery, Klinik Gut, St. Moritz, Switzerland
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van Eck CF, Limpisvasti O, ElAttrache NS. Is There a Role for Internal Bracing and Repair of the Anterior Cruciate Ligament? A Systematic Literature Review. Am J Sports Med 2018; 46:2291-2298. [PMID: 28783472 DOI: 10.1177/0363546517717956] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Renewed interest has arisen in arthroscopic anterior cruciate ligament (ACL) repair techniques. HYPOTHESIS ACL repair with or without some form of internal bracing could lead to good outcomes in a carefully selected subset of patients. STUDY DESIGN Systematic review. METHODS An electronic database search was performed to identify 89 papers describing preclinical and clinical studies on the outcome of ACL repair. RESULTS Proximal ACL tear patterns showed a better healing potential with primary repair than distal or midsubstance tears. Some form of internal bracing increased the success rate of ACL repair. Improvement in the biological characteristics of the repair was obtained by bone marrow access by drilling tunnels or microfracture. Augmentation with platelet-rich plasma was beneficial only in combination with a structural scaffold. Skeletally immature patients had the best outcomes. Acute repair offered improved outcomes with regard to load, stiffness, laxity, and rerupture. CONCLUSION ACL repair may be a viable option in young patients with acute, proximal ACL tears. The use of internal bracing, biological augmentation, and scaffold tissue may increase the success rate of repair.
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Affiliation(s)
| | - Orr Limpisvasti
- Kerlan Jobe Orthopaedic Clinic, Los Angeles, California, USA
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Kanikarla-Marie P, Lam M, Sorokin AV, Overman MJ, Kopetz S, Menter DG. Platelet Metabolism and Other Targeted Drugs; Potential Impact on Immunotherapy. Front Oncol 2018; 8:107. [PMID: 29732316 PMCID: PMC5919962 DOI: 10.3389/fonc.2018.00107] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 03/27/2018] [Indexed: 12/13/2022] Open
Abstract
The role of platelets in cancer progression has been well recognized in the field of cancer biology. Emerging studies are elaborating further the additional roles and added extent that platelets play in promoting tumorigenesis. Platelets release factors that support tumor growth and also form heterotypic aggregates with tumor cells, which can provide an immune-evasive advantage. Their most critical role may be the inhibition of immune cell function that can negatively impact the body’s ability in preventing tumor establishment and growth. This review summarizes the importance of platelets in tumor progression, therapeutic response, survival, and finally the notion of immunotherapy modulation being likely to benefit from the inclusion of platelet inhibitors.
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Affiliation(s)
- Preeti Kanikarla-Marie
- Department of GI Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Michael Lam
- Department of GI Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Alexey V Sorokin
- Department of GI Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Michael J Overman
- Department of GI Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Scott Kopetz
- Department of GI Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - David G Menter
- Department of GI Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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Whitney KE, Liebowitz A, Bolia IK, Chahla J, Ravuri S, Evans TA, Philippon MJ, Huard J. Current perspectives on biological approaches for osteoarthritis. Ann N Y Acad Sci 2018; 1410:26-43. [PMID: 29265418 DOI: 10.1111/nyas.13554] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 10/18/2017] [Accepted: 10/25/2017] [Indexed: 12/18/2022]
Abstract
Musculoskeletal injuries that disrupt the structure and function of diarthrodial joints can cause permanent biomechanical alterations and lead to a more severe, chronic condition. Despite advancements that have been made to restore tissue function and delay the need for joint replacement, there are currently no disease-modifying therapies for osteoarthritis (OA). To reduce the risk of OA, innovative preventive medicine approaches have been developed over the last decade to treat the underlying pathology. Several biological approaches are promising treatment modalities for various stages of OA owing to their minimally invasive nature and actively dynamic physiological mechanisms that attenuate tissue degradation and inflammatory responses. Individualized growth factor and cytokine therapies, tissue-engineered biomaterials, and cell-based therapies have revolutionary potential for orthopedic applications; however, the paucity of standardization and categorization of biological components and their counterparts has made it difficult to determine their clinical and biological efficacy. Cell-based therapies and tissue-engineered biologics have become lucrative in sports medicine and orthopedics; nonetheless, there is a continued effort to produce a biological treatment modality tailored to target intra-articular structures that recapitulates tissue function. Advanced development of these biological treatment modalities will potentially optimize tissue healing, regeneration, and joint preservation strategies. Therefore, the purpose of this paper is to review current concepts on several biological treatment approaches for OA.
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Affiliation(s)
- Kaitlyn E Whitney
- Steadman Philippon Research Institute, Vail, Colorado.,The Steadman Clinic, Vail, Colorado
| | | | | | - Jorge Chahla
- Steadman Philippon Research Institute, Vail, Colorado
| | | | - Thos A Evans
- Steadman Philippon Research Institute, Vail, Colorado.,The Steadman Clinic, Vail, Colorado
| | - Marc J Philippon
- Steadman Philippon Research Institute, Vail, Colorado.,The Steadman Clinic, Vail, Colorado
| | - Johnny Huard
- Steadman Philippon Research Institute, Vail, Colorado.,The University of Texas Health Science Center at Houston, Houston, Texas
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Perrone GS, Proffen BL, Kiapour AM, Sieker JT, Fleming BC, Murray MM. Bench-to-bedside: Bridge-enhanced anterior cruciate ligament repair. J Orthop Res 2017; 35:2606-2612. [PMID: 28608618 PMCID: PMC5729057 DOI: 10.1002/jor.23632] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 06/05/2017] [Indexed: 02/04/2023]
Abstract
Anterior cruciate ligament (ACL) injuries are one of the most well-known orthopaedic injuries and are treated with one of the most common orthopaedic procedures performed in the United States. This surgical procedure, ACL reconstruction, is successful at restoring the gross stability of the knee. However, the outcomes of ACL reconstruction can be limited by short and long-term complications, including muscle weakness, graft rupture, and premature osteoarthritis. Thus, new methods of treating this injury are being explored. This review details the pathway of how a tissue engineering strategy can be used to improve the healing of the ACL in preclinical studies and then translated to patients in an FDA-approved clinical study. This review paper will outline the clinical importance of ACL injuries, history of primary repair, the pathology behind failure of the ACL to heal, pre-clinical studies, the FDA approval process for a high risk medical device, and the preliminary results from a first-in-human study. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2606-2612, 2017.
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Affiliation(s)
- Gabriel S Perrone
- Department of Orthopaedic Surgery, Sports Medicine Research Laboratory, Harvard Medical School/Boston Children's Hospital, Boston, Massachusetts
| | - Benedikt L Proffen
- Department of Orthopaedic Surgery, Sports Medicine Research Laboratory, Harvard Medical School/Boston Children's Hospital, Boston, Massachusetts
| | - Ata M Kiapour
- Department of Orthopaedic Surgery, Sports Medicine Research Laboratory, Harvard Medical School/Boston Children's Hospital, Boston, Massachusetts
| | - Jakob T Sieker
- Department of Orthopaedic Surgery, Sports Medicine Research Laboratory, Harvard Medical School/Boston Children's Hospital, Boston, Massachusetts
| | - Braden C Fleming
- Department of Orthopaedics, Bioengineering Labs, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, Rhode Island
| | - Martha M Murray
- Department of Orthopaedic Surgery, Sports Medicine Research Laboratory, Harvard Medical School/Boston Children's Hospital, Boston, Massachusetts
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Hu K, Olsen BR, Besschetnova TY. Cell autonomous ANTXR1-mediated regulation of extracellular matrix components in primary fibroblasts. Matrix Biol 2016; 62:105-114. [PMID: 28011198 DOI: 10.1016/j.matbio.2016.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 12/06/2016] [Accepted: 12/09/2016] [Indexed: 12/28/2022]
Abstract
Our previous studies of Antxr1 knockout mice suggested that fibrotic skin abnormalities in these mice are associated with increased VEGF signaling. Here, based on studies of primary fibroblasts isolated from skin of Antx1+/+ and Antxr1-/- mice at embryonic stage E17.5 and postnatal day P49, we conclude that increased Col1a1 and Fn1 expression in Antxr1-deficient fibroblasts is partly mediated by a cell-autonomous ANTXR1-dependent mechanism. In turn, this may act in parallel with VEGF-dependent regulation of collagen type I and fibronectin production. We demonstrate that shRNA mediated knockdown of VEGF in Antxr1-/- fibroblasts reduces Col1a1 and Fn1 expression to below control levels, and these are restored by exogenous addition of recombinant VEGF. In addition, the increase in protein levels of collagen type I and fibronectin in mutant cells is blocked by VEGF neutralizing antibody. However, expressing the longest isoform of ANTXR1 (sv1) in mutant fibroblasts decreases levels of Ctgf, Col1a1 and Fn1 transcripts, but has no effect on VEGF expression. Taken together, our data suggest that the increased matrix production in Antxr1- deficient fibroblasts primarily occurs via a CTGF-dependent pathway and that other ANTXR1-associated mechanisms contribute to VEGF-dependent increase of collagen type I and fibronectin expression. Our findings provide a basis for further studies of novel ANTXR1-dependent connective tissue homeostatic control mechanisms in healthy individuals, patients with organ fibrosis, and patients with GAPO syndrome.
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Affiliation(s)
- Kai Hu
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, United States
| | - Bjorn R Olsen
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, United States; Department of Cell Biology, Harvard Medical School, United States
| | - Tatiana Y Besschetnova
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, United States; Department of Oral and Maxillofacial Surgery/Skeletal Biology Research Center, Massachusetts General Hospital and Harvard School of Dental Medicine, Boston, MA, United States.
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Taylor SA, Khair MM, Roberts TR, DiFelice GS. Primary Repair of the Anterior Cruciate Ligament: A Systematic Review. Arthroscopy 2015; 31:2233-47. [PMID: 26165465 DOI: 10.1016/j.arthro.2015.05.007] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 04/13/2015] [Accepted: 05/13/2015] [Indexed: 02/02/2023]
Abstract
PURPOSE To describe the clinical and preclinical research conducted on primary repair of the anterior cruciate ligament (ACL) during the past 10 years. METHODS A systematic search of PubMed, the Cochrane Central Register of Controlled Trials, and Embase was performed for all English-language studies published between 2003 and April 2014 on primary repair of the ACL. RESULTS Twenty-six studies met the inclusion and exclusion criteria. In the clinical research group, 8 studies (166 patients; age range, 10 to 71 years) met the inclusion and exclusion criteria and were largely long-term clinical outcome studies, based on the original cohorts from the 1970s and 1980s, and suggested high failure rates, additional surgery, and revision for instability. A subset of patients, however, achieved good to excellent subjective and objective long-term outcomes. In the preclinical research group, 18 studies met the inclusion and exclusion criteria and were based on an ACL transection model; they suggested that (1) stabilization of the knee with an internal suture strut improved the healing and biomechanical properties of the repaired ACL, (2) "enhancing" the repair with biological collagen-platelet composite augmentation improved healing and mechanical strength, (3) younger age and skeletal immaturity seem to correlate with improved histologic healing and biomechanical properties, (4) enhanced primary repair of the ACL may reduce post-traumatic osteoarthritis, and (5) the native ACL biomechanically outperformed the repaired ACL. CONCLUSIONS Although long-term human studies suggest collectively unacceptable outcomes for open primary repair of the ACL, a subset of patients achieved acceptable long-term results. ACL transection model animal studies showed improved healing and biomechanics with primary suture repair stabilization, early intervention, biological augmentation techniques, and younger age. Primary repair of the ACL may be an effective treatment modality for an appropriately selected subset of patients. LEVEL OF EVIDENCE Level IV, systematic review of preclinical and clinical Level IV studies.
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Affiliation(s)
- Samuel A Taylor
- Orthopaedic Trauma and Sports Medicine Services, Hospital for Special Surgery, New York, New York, U.S.A
| | - M Michael Khair
- Orthopaedic Trauma and Sports Medicine Services, Hospital for Special Surgery, New York, New York, U.S.A
| | - Timothy R Roberts
- Orthopaedic Trauma and Sports Medicine Services, Hospital for Special Surgery, New York, New York, U.S.A
| | - Gregory S DiFelice
- Orthopaedic Trauma and Sports Medicine Services, Hospital for Special Surgery, New York, New York, U.S.A..
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Kuffler DP. Platelet-Rich Plasma Promotes Axon Regeneration, Wound Healing, and Pain Reduction: Fact or Fiction. Mol Neurobiol 2015; 52:990-1014. [PMID: 26048672 DOI: 10.1007/s12035-015-9251-x] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Indexed: 11/25/2022]
Abstract
Platelet-rich plasma (PRP) has been tested in vitro, in animal models, and clinically for its efficacy in enhancing the rate of wound healing, reducing pain associated with injuries, and promoting axon regeneration. Although extensive data indicate that PRP-released factors induce these effects, the claims are often weakened because many studies were not rigorous or controlled, the data were limited, and other studies yielded contrary results. Critical to assessing whether PRP is effective are the large number of variables in these studies, including the method of PRP preparation, which influences the composition of PRP; type of application; type of wounds; target tissues; and diverse animal models and clinical studies. All these variables raise the question of whether one can anticipate consistent influences and raise the possibility that most of the results are correct under the circumstances where PRP was tested. This review examines evidence on the potential influences of PRP and whether PRP-released factors could induce the reported influences and concludes that the preponderance of evidence suggests that PRP has the capacity to induce all the claimed influences, although this position cannot be definitively argued. Well-defined and rigorously controlled studies of the potential influences of PRP are required in which PRP is isolated and applied using consistent techniques, protocols, and models. Finally, it is concluded that, because of the purported benefits of PRP administration and the lack of adverse events, further animal and clinical studies should be performed to explore the potential influences of PRP.
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Affiliation(s)
- Damien P Kuffler
- Institute of Neurobiology, University of Puerto Rico, Medical Sciences Campus, 201 Blvd. Del Valle, San Juan, 00901, Puerto Rico,
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Why menisci show higher healing rate when repaired during ACL reconstruction? Growth factors release can be the explanation. Knee Surg Sports Traumatol Arthrosc 2015; 23:90-6. [PMID: 24146050 DOI: 10.1007/s00167-013-2712-8] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 10/08/2013] [Indexed: 01/14/2023]
Abstract
PURPOSE Healing rate of meniscus repair is higher when the suture is associated with anterior cruciate ligament reconstruction. A possible explanation can be a different pattern of release of growth factors between anterior cruciate ligament reconstruction and isolated meniscus surgery. Hypothesis of this study is that the concentrations of bFGF, TGF-β and platelet-derived growth factor (PDGF) in joint fluid, immediately after single-bundle anterior cruciate ligament reconstruction and arthroscopic partial meniscectomy, can be different. METHODS Twenty consecutive patients underwent partial medial meniscectomy and twenty consecutive patients underwent single-bundle anterior cruciate ligament reconstruction with hamstring grafts were enrolled in the study. Thirty minutes after the end of the surgical procedure, a sample of joint fluid, as well of venous blood, was collected from all the patients. Concentrations of growth factors were determined by enzyme-linked immunosorbent assay. RESULTS The peripheral blood concentration of TGF-β, bFGF and PDGF was comparable between partial meniscectomy and anterior cruciate ligament reconstruction groups. No differences between the two surgical techniques were also found in term of TGF-β and bFGF joint fluid concentration, whereas joint PDGF concentration of anterior cruciate ligament reconstruction patients was significantly higher than the one found in partial meniscectomy patients. CONCLUSIONS A significant growth factors release was detected in the knee joint during arthroscopic surgery. PDGF concentration was significantly higher in anterior cruciate ligament reconstructed knee than in the meniscectomy group. PDGF can play an important role enhancing the healing response of meniscus suture and can be one of the biological reasons of the higher meniscal healing rate in anterior cruciate ligament reconstructed knee.
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Abstract
Injury to the anterior cruciate ligament (ACL) is one of the most devastating and frequent injuries of the knee. Surgical reconstruction is the current standard of care for treatment of ACL injuries in active patients. The widespread adoption of ACL reconstruction over primary repair was based on early perception of the limited healing capacity of the ACL. Although the majority of ACL reconstruction surgeries successfully restore gross joint stability, post-traumatic osteoarthritis is commonplace following these injuries, even with ACL reconstruction. The development of new techniques to limit the long-term clinical sequelae associated with ACL reconstruction has been the main focus of research over the past decades. The improved knowledge of healing, along with recent advances in tissue engineering and regenerative medicine, has resulted in the discovery of novel biologically augmented ACL-repair techniques that have satisfactory outcomes in preclinical studies. This instructional review provides a summary of the latest advances made in ACL repair. Cite this article: Bone Joint Res 2014;3:20-31.
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Affiliation(s)
- A M Kiapour
- Boston Children's Hospital, Harvard MedicalSchool, Sports Medicine Research Laboratory, Departmentof Orthopaedic Surgery, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
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Manual khalifa therapy improves functional and morphological outcome of patients with anterior cruciate ligament rupture in the knee: a randomized controlled trial. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:462840. [PMID: 24600477 PMCID: PMC3926243 DOI: 10.1155/2014/462840] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 11/04/2013] [Accepted: 12/03/2013] [Indexed: 11/17/2022]
Abstract
Rupture of the anterior cruciate ligament (ACL) is a high incidence injury usually treated surgically. According to common knowledge, it does not heal spontaneously, although some claim the opposite. Regeneration therapy by Khalifa was developed for injuries of the musculoskeletal system by using specific pressure to the skin. This randomized, controlled, observer-blinded, multicentre study was performed to validate this assumption. Thirty patients with complete ACL rupture, magnetic resonance imaging (MRI) verified, were included. Study examinations (e.g., international knee documentation committee (IKDC) score) were performed at inclusion (t 0). Patients were randomized to receive either standardised physiotherapy (ST) or additionally 1 hour of Khalifa therapy at the first session (STK). Twenty-four hours later, study examinations were performed again (t 1). Three months later control MRI and follow-up examinations were performed (t 2). Initial status was comparable between both groups. There was a highly significant difference of mean IKDC score results at t 1 and t 2. After 3 months, 47% of the STK patients, but no ST patient, demonstrated an end-to-end homogeneous ACL in MRI. Clinical and physical examinations were significantly different in t 1 and t 2. ACL healing can be improved with manual therapy. Physical activity can be performed without pain and nearly normal range of motion after one treatment of specific pressure.
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