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Klein B, Bartlett LE, Huyke-Hernandez FA, Tauro TM, Landman F, Cohn RM, Sgaglione NA. Analysis of Changing Practice Trends in Anterior Cruciate Ligament Reconstruction: A Multicenter, Single-Institution Database Analysis. Arthroscopy 2024:S0749-8063(24)00169-5. [PMID: 38447628 DOI: 10.1016/j.arthro.2024.02.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 02/24/2024] [Accepted: 02/24/2024] [Indexed: 03/08/2024]
Abstract
PURPOSE To identify trends in anterior cruciate ligament reconstruction (ACLR), including graft choice, femoral tunnel drilling techniques, and augmentation techniques, and to assess how various surgeon factors impact these trends. METHODS A retrospective review of primary ACLRs performed between 2014 and 2022 was completed using a multicenter institutional database. Patient demographic characteristics, graft type, femoral drilling technique, use of extra-articular tenodesis, and use of suture augmentation were recorded from the medical record. Surgeon fellowship training (sports trained vs non-sports trained), experience (high [minimum of 15 years in practice] vs low), and volume (high [minimum of 15 ACLRs/year] vs low) were used to stratify technique utilization. The z test for proportions was used to compare categorical variables. Pearson correlation analyses identified trends and assessed statistical significance, defined as P < .05. RESULTS Our cohort consisted of 2,032 ACLRs performed in 2,006 patients. The average patient age was 28.3 ± 11.6 years, with more procedures performed in male patients (67.3%). The average length of surgeon experience was 19.7 ± 11.4 years, with an average annual procedural volume of 4.0 ± 5.4 ACLRs. Most surgeons were sports trained (n = 55, 64.7%), high experience (n = 44, 57.1%), and low volume (n = 80, 94.1%). There was an increasing annual proportion of ACLRs performed by sports-trained surgeons (R = 0.748, P = .020) and low-experience surgeons (R = 0.940, P < .001). Autograft reconstructions were most often performed by sports-trained (71.2%), low-experience (66.1%), and high-volume (76.9%) surgeons. There was an increasing proportion of autograft ACLRs that used quadriceps tendon among sports-trained (R = 0.739, P = .023), high-experience (R = 0.768, P = .016), and low-volume (R = 0.785, P = .012) surgeons. Independent drilling techniques were used in an increasing proportion of ACLRs performed by non-sports-trained (R = 0.860, P = .003) and high-volume (R = 0.864, P = .003) surgeons. Augmentation of ACLR with concomitant suture augmentation (n = 24, 1.2%) or extra-articular tenodesis (n = 6, 0.3%) was rarely performed. CONCLUSIONS In our multicenter institution, the quadriceps tendon autograft has been increasingly used in ACLR by sports-trained, low-volume, and high-experience surgeons. Independent drilling techniques have been increasingly used by non-sports-trained and high-volume surgeons. CLINICAL RELEVANCE Surgeons must stay current with the literature that affects their procedures to ensure that evidence-based medicine is being practiced.
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Affiliation(s)
- Brandon Klein
- Department of Orthopaedic Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Health, Huntington, New York, U.S.A..
| | - Lucas E Bartlett
- Rowan-Virtua School of Osteopathic Medicine, Stratford, New Jersey, U.S.A
| | | | - Tracy M Tauro
- Rowan-Virtua School of Osteopathic Medicine, Stratford, New Jersey, U.S.A
| | - Francis Landman
- Mount Sinai South Nassau, Department of Internal Medicine, Oceanside, New York, U.S.A
| | - Randy M Cohn
- Department of Orthopaedic Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Health, Huntington, New York, U.S.A
| | - Nicholas A Sgaglione
- Department of Orthopaedic Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Health, Huntington, New York, U.S.A
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Turati M, Rigamonti L, Giulivi A, Gaddi D, Accadbled F, Zanchi N, Bremond N, Catalano M, Gorla M, Omeljaniuk RJ, Zatti G, Piatti M, Bigoni M. Management of anterior cruciate ligament tears in Tanner stage 1 and 2 children: a narrative review and treatment algorithm guided by ACL tear location. J Sports Med Phys Fitness 2023; 63:1218-1226. [PMID: 34609098 DOI: 10.23736/s0022-4707.21.12783-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The incidence of anterior cruciate ligament (ACL) tears in skeletally immature patients has acutely increased over the last 20 years, yet there is no consensus on a single "best treatment." Selection of an optimal treatment is critical and based on individual circumstances; consequently, we propose a treatment-selection algorithm based on skeletal development, ACL tear location, type, and quality, as well as parental perspective in order to facilitate the decision-making process. We combined our surgical group's extensive case histories of ACL tear management in Tanner Stage 1 and 2 patients with those in the literature to form a consolidated data base. For each case the diagnostic phase, communication with patient and parents, treatment choice(s), selected surgical techniques and rehabilitation schedule were critically analyzed and compared for patient outcomes. MRI-imaging and intraoperative tissue quality assessment were preeminent in importance for selection of the optimal treatment strategy. Considerations for selecting an optimal treatment included: associated lesions, the child/patient and parent(s)' well-informed and counseled consent, biological potential, and the potential for successful ACL preservative surgery. Complete ACL tears were evaluated according to tear-location. In type I and II ACL tears with remaining good tissue quality, we propose primary ACL repair. In type III and IV ACL tears we propose physeal-sparing reconstruction with an iliotibial band graft. Finally, in the case of a type V ACL tear, we propose that the best treatment be based on the Meyers-McKeever classification. We present a facile decision-making algorithm for ACL management in pediatric patients based on specific elements of tissue damage and status.
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Affiliation(s)
- Marco Turati
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy -
- Department of Orthopedics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy -
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy -
- Couple Enfant Hospital, Grenoble, France -
- Department of Pediatric Orthopedic Surgery, Couple Enfant Hospital, Grenoble Alpes University, Grenoble, France -
| | - Luca Rigamonti
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Andrea Giulivi
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
| | - Diego Gaddi
- Department of Orthopedics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
| | - Franck Accadbled
- Department of Orthopedics, Children's Hospital, CHU de Toulouse, Toulouse, France
| | - Nicolò Zanchi
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
| | - Nicolas Bremond
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
- Department of Pediatric Orthopedic Surgery, Couple Enfant Hospital, Grenoble Alpes University, Grenoble, France
| | - Marcello Catalano
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
| | - Massimo Gorla
- Department of Orthopedics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
| | - Robert J Omeljaniuk
- Department of Orthopedics, Children's Hospital, CHU de Toulouse, Toulouse, France
- Department of Biology, Lakehead University, Thunder Bay, ON, Canada
| | - Giovanni Zatti
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Department of Orthopedics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
| | - Massimiliano Piatti
- Department of Orthopedics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
| | - Marco Bigoni
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Department of Orthopedics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Couple Enfant Hospital, Grenoble, France
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Tang C, Kwaees TA, Accadbled F, Turati M, Green DW, Nicolaou N. Surgical techniques in the management of pediatric anterior cruciate ligament tears: Current concepts. J Child Orthop 2023; 17:12-21. [PMID: 36755552 PMCID: PMC9900020 DOI: 10.1177/18632521221149059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 12/14/2022] [Indexed: 01/16/2023] Open
Abstract
Background Anterior cruciate ligament injury in the child and adolescent patient remains a controversial topic when considering management, especially regarding surgical choices. Treatment variations are seen not just when comparing different countries but also within nations. This arises partly as contemporary treatment is mostly inferred from the adult population who physiologically and in terms of outcomes differ significantly from children. There is an increasing body of evidence for this cohort of patients who have specific challenges and difficulties when determining the optimum treatment. Methods Within this article, we will summarize the current evidence for surgical management of anterior cruciate ligament injury for the pediatric patient. Results and Conclusions There remain many controversies and gaps inthe treatment of Paediatric Anterior cruciate ligament reconstruction and this high risk cohort continues to cause difficulty in identifying the best mode of surgical management. Level of evidence level IV.
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Affiliation(s)
- Chun Tang
- Department of Paediatric Orthopaedics and Spinal Surgery, Sheffield Children’s Hospital, Sheffield Children’s NHS Foundation Trust, Sheffield, UK
| | - Tariq Adam Kwaees
- Department of Paediatric Orthopaedics and Spinal Surgery, Sheffield Children’s Hospital, Sheffield Children’s NHS Foundation Trust, Sheffield, UK
| | - Franck Accadbled
- Department of Orthopaedics, Children’s Hospital, CHU de Toulouse, Toulouse, France
| | - Marco Turati
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Transalpine Center of Pediatric Sports Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Orthopedic Department, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
- Department of Paediatric Orthopedic Surgery, Hospital Couple Enfant, Grenoble Alpes University, Grenoble, France
| | - Daniel W Green
- Department of Pediatric Orthopedics, Hospital for Special Surgery, New York, NY, USA
| | - Nicolas Nicolaou
- Department of Paediatric Orthopaedics and Spinal Surgery, Sheffield Children’s Hospital, Sheffield Children’s NHS Foundation Trust, Sheffield, UK
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Fourman MS, Hassan SG, Roach JW, Grudziak JS. Anatomic all-epiphyseal ACL reconstruction with "inside-out" femoral tunnel placement in immature patients yields high return to sport rates and functional outcome scores a minimum of 24 months after reconstruction. Knee Surg Sports Traumatol Arthrosc 2021; 29:4251-60. [PMID: 33811490 DOI: 10.1007/s00167-021-06542-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 03/18/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE To understand if anatomic physeal-sparing ACL reconstruction in the immature host preserves range of motion, permits a return to sports, and avoids limb length discrepancy and accelerated intra-articular degeneration with a cross-sectional radiographic, physical examination and patient-reported outcomes analysis. METHODS A cross-sectional recall study included 38 patients aged 7-15 who underwent all-epiphyseal ACL reconstruction with hamstring allograft performed by a single surgeon at a large academic medical center. All-epiphyseal reconstructions were performed using a modified Anderson physeal-sparing technique, with the femoral tunnel placed using an "inside-out" technique. Assessments consisted of a physical exam, long leg cassette radiographs, KT-1000 measurements, subjective patient metrics, and magnetic resonance imaging. RESULTS Thirty-eight (56.7%) of 66 eligible patients returned for in-person clinical and radiographic exams. Patients were 11.4 ± 1.8 years at the time of surgery. Five patients were females (13.2%). Mean follow-up was 5.5 ± 2.4 years. ACL re-injuries occurred in four patients (10.5%), all of whom underwent revision reconstructions. Thirty-three of the remaining 34 (97.1%) patients returned to sports following their reconstruction, and 24 (70.6%) returned to their baseline level of competition. Mean limb length discrepancy (LLD) was 0.2 ± 1.4 cm. Nine patients had an LLD of > 1 cm (26.5%), which occurred at an equivalent age as those with < 1 cm LLD (10.8 ± 2.0 vs. 11.7 ± 1.7, n.s.). Pre-operative Marx scores (13.1 ± 3.5) were not significantly different from post-operative values (12.3 ± 5.1, n.s.). Patients who required ACL revisions had significantly lower Marx scores than those with intact primary grafts (8.3 ± 7.1 vs. 13.4 ± 4.5, p = 0.047). Cohort mean International Knee Documentation Committee (IKDC) score was 89.7 ± 12.7. CONCLUSION Anatomic all-epiphyseal anatomic ACL reconstruction appears to be useful in patients with significant projected remaining growth, with good return-to-sport outcomes and minimal risk of clinically significant physeal complications. However, given the limited patient recall possible in the present study, further large sample size, high-quality works are necessary to validate our findings. LEVEL OF EVIDENCE Level IV.
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James EW, Dawkins BJ, Schachne JM, Ganley TJ, Kocher MS, Anderson CN, Busch MT, Chambers HG, Christino MA, Cordasco FA, Edmonds EW, Green DW, Heyworth BE, Lawrence JTR, Micheli LJ, Milewski MD, Matava MJ, Nepple JJ, Parikh SN, Pennock AT, Perkins CA, Saluan PM, Shea KG, Wall EJ, Willimon SC, Fabricant PD. Early Operative Versus Delayed Operative Versus Nonoperative Treatment of Pediatric and Adolescent Anterior Cruciate Ligament Injuries: A Systematic Review and Meta-analysis. Am J Sports Med 2021; 49:4008-4017. [PMID: 33720764 DOI: 10.1177/0363546521990817] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Treatment options for pediatric and adolescent anterior cruciate ligament (ACL) injuries include early operative, delayed operative, and nonoperative management. Currently, there is a lack of consensus regarding the optimal treatment for these injuries. PURPOSE/HYPOTHESIS The purpose was to determine the optimal treatment strategy for ACL injuries in pediatric and adolescent patients. We hypothesized that (1) early ACL reconstruction results in fewer meniscal tears than delayed reconstruction but yields no difference in knee stability and (2) when compared with nonoperative management, any operative management results in fewer meniscal tears and cartilage injuries, greater knee stability, and higher return-to-sport rates. STUDY DESIGN Systematic review and meta-analysis; Level of evidence, 4. METHODS A systematic search of databases was performed including PubMed, Embase, and Cochrane Library using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Inclusion criteria were a pediatric and adolescent patient population (≤19 years old at surgery), the reporting of clinical outcomes after treatment of primary ACL injury, and original scientific research article. Exclusion criteria were revision ACL reconstruction, tibial spine avulsion fracture, case report or small case series (<5 patients), non-English language manuscripts, multiligamentous injuries, and nonclinical studies. RESULTS A total of 30 studies containing 50 cohorts and representing 1176 patients met our criteria. With respect to nonoperative treatment, knee instability was observed in 20% to 100%, and return to preinjury level of sports ranged from 6% to 50% at final follow-up. Regarding operative treatment, meta-analysis results favored early ACL reconstruction over delayed reconstruction (>12 weeks) for the presence of any meniscal tear (odds ratio, 0.23; P = .006) and irreparable meniscal tear (odds ratio, 0.31; P = .001). Comparison of any side-to-side differences in KT-1000 arthrometer testing did not favor early or delayed ACL reconstruction in either continuous mean differences (P = .413) or proportion with difference ≥3 mm (P = .181). Return to preinjury level of competition rates for early and delayed ACL reconstruction ranged from 57% to 100%. CONCLUSION Delaying ACL reconstruction in pediatric or adolescent patients for >12 weeks significantly increased the risk of meniscal injuries and irreparable meniscal tears; however, early and delayed operative treatment achieved satisfactory knee stability. Nonoperative management resulted in high rates of residual knee instability, increased risk of meniscal tears, and comparatively low rates of return to sports.
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Affiliation(s)
- Evan W James
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Brody J Dawkins
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Jonathan M Schachne
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Theodore J Ganley
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Mininder S Kocher
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
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- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Christian N Anderson
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Michael T Busch
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Henry G Chambers
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Melissa A Christino
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Frank A Cordasco
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Eric W Edmonds
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Daniel W Green
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Benton E Heyworth
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - J Todd R Lawrence
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Lyle J Micheli
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Matthew D Milewski
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Matthew J Matava
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Jeffrey J Nepple
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Shital N Parikh
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Andrew T Pennock
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Crystal A Perkins
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Paul M Saluan
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Kevin G Shea
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Eric J Wall
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Samuel C Willimon
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
| | - Peter D Fabricant
- Investigation performed at Hospital for Special Surgery, New York, New York, USA
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Accadbled F, Gracia G, Laumonerie P, Thevenin-Lemoine C, Heyworth BE, Kocher MS. Paediatric anterior cruciate ligament tears: management and growth disturbances. A survey of EPOS and POSNA membership. J Child Orthop 2019; 13:522-528. [PMID: 31695820 PMCID: PMC6808070 DOI: 10.1302/1863-2548.13.190074] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
PURPOSE The therapeutic algorithm of paediatric anterior cruciate ligament (ACL) tears remains controversial. The primary aim of the study was to describe variations in practice patterns among European Paediatric Orthopaedic Society (EPOS) and Pediatric Orthopaedic Society of North America (POSNA) members with respect to management of ACL tears in skeletally immature patients. The secondary objective was to determine the number, type and severity of growth disturbances associated with ACL reconstruction (ACLR). METHODS An email invitation to complete a 52-question survey was sent to all members of POSNA and EPOS. Data were collected automatically. Descriptive statistics were applied. RESULTS In all, 305 (25.4%) surgeon members responded. Only 182 (60%) of the participants treated ACL injuries in skeletally immature patients and completed the survey. A total of 17% of EPOS and 70% of POSNA members recommended ACLR within three months for a prepubescent paediatric ACL tear. In total, 61% of POSNA and 83% of EPOS members recommended ACLR within three months for a pubescent paediatric ACL tear. Epiphyseal tunnels were the preferred technique in prepubescent children (43% at the tibia and 49% at the femur), while transphyseal tunnels were recommended preferentially in pubescent children (85% at the tibia and 63% at the femur). In all, 5.5% of participants reported growth disturbances after ACLR. CONCLUSION Current practice patterns across the Atlantic remain varied and controversial. Consensus remains elusive; as such, research collaboration among societies will be important to develop an evidence-based treatment algorithm. The use of transphyseal tunnels has been reinforced. The number of cases of significant growth disturbance is minimal, yet worrisome. LEVEL OF EVIDENCE II.
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Affiliation(s)
- F. Accadbled
- Department of Orthopaedics, Children’s Hospital, CHU de Toulouse, France,Correspondence should be sent to F. Accadbled, Service de Chirurgie Orthopédique et Traumatologique, Hôpital des Enfants 330, Avenue de Grande Bretagne, 31059 Toulouse cedex 9, France.
| | - G. Gracia
- Department of Orthopaedics, Children’s Hospital, CHU de Toulouse, France
| | - P. Laumonerie
- Department of Orthopaedics, Children’s Hospital, CHU de Toulouse, France
| | | | - B. E. Heyworth
- Department of Orthopaedic Surgery, Division of Sports Medicine, Boston Children’s Hospital; and Harvard Medical School, Boston, Massachusetts, USA
| | - M. S. Kocher
- Department of Orthopaedic Surgery, Division of Sports Medicine, Boston Children’s Hospital; and Harvard Medical School, Boston, Massachusetts, USA
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