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Khademi M, Haghpanahi M, Razi M, Sharifnezhad A, Nikkhoo M. Development of a novel geometrically-parametric patient-specific finite element model for anterior cruciate ligament reconstruction. Knee 2024; 50:41-58. [PMID: 39116664 DOI: 10.1016/j.knee.2024.07.020] [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: 03/23/2024] [Revised: 05/29/2024] [Accepted: 07/18/2024] [Indexed: 08/10/2024]
Abstract
PURPOSE A personalized model of the knee joint, with adjustable effective geometric parameters for the transplanted autograft diameter in Anterior Cruciate Ligament Reconstruction (ACLR) using the bone-patella-tendon-bone (BPTB) technique, has been developed. The model will assist researchers in understanding how different graft sizes impact a patient's recovery over time. METHODS The study involved selecting a group of individuals without knee injuries and one patient who had undergone knee surgery. Gait analysis was conducted on the control group and the patient at various time points. A 3D model of the knee joint was created using medical images of the patient. Forces and torques obtained from the gait analysis were applied to the model to perform finite element analysis. RESULTS The results of the finite element (FE) analysis, along with kinetic data from both groups, indicate that models with diameters of 7.5 mm and 12 mm improved joint motion during follow-up after ACLR. Additionally, a comparison of the stress applied to the ACL model revealed that a 12 mm autograft diameter showed a more favorable trend in patient recovery during the three follow-up intervals after ACL reconstruction surgery. CONCLUSION The development of a personalized parametric model with adjustable geometric parameters in ACLR, such as the transplanted autograft diameter, as presented in this study, along with FE using the patient's kinetic data, allows for the examination and selection of an appropriate autograft diameter for Patella Tendon grafting. This can help reduce stress on the autograft and prevent damage to other knee joint tissues after ACLR.
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Affiliation(s)
- Midiya Khademi
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Mohammad Haghpanahi
- Department of Mechanical Engineering, Iran University of Science and Technology, IUST, Tehran, Iran.
| | - Mohammad Razi
- Emeritus Associate Professor of Orthopedic Surgery, Iran University of Medical Sciences, IUMS, Tehran, Iran.
| | - Ali Sharifnezhad
- Department of Sport Biomechanics and Technology, Sport Science Research Institute, SSRI, Tehran, Iran.
| | - Mohammad Nikkhoo
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran; School of Physical Therapy and Graduate Institute of Rehabilitation Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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Zhu S, Li R. All-Inside Anterior Cruciate Ligament Reconstruction Had Clinical Outcome Similar to the Transtibial Technique Except for Improved Side-to-Side Difference and Tegner Activity Scale: A Systematic Review and Meta-analysis. Arthroscopy 2024; 40:2276-2288. [PMID: 38354760 DOI: 10.1016/j.arthro.2024.01.044] [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] [Received: 10/19/2023] [Revised: 01/30/2024] [Accepted: 01/30/2024] [Indexed: 02/16/2024]
Abstract
PURPOSE To compare clinical outcomes of the all-inside technique with the transtibial technique in anterior cruciate ligament reconstruction based on available literature on this topic. METHODS According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist, we conducted a systematic search for randomized controlled trials and cohort studies. Our comprehensive search encompassed PubMed, Embase, Cochrane Library, and Web of Science. We included randomized controlled trials (RCTs) and cohort studies that compared the 2 techniques with a minimal 1-year follow-up. Two independent authors assessed RCTs using the risk of bias tool developed by the Cochrane Collaboration and evaluated the quality of cohort studies using the Newcastle-Ottawa Scale for Assessing the Quality of Nonrandomized Comparative Trials. The subjective and objective outcomes, complications, and graft failure were obtained. R software was used to perform the analysis. RESULTS The present analysis enrolled 9 RCTs (n = 687) and 11 cohort studies (n = 910). After a minimal 1-year follow-up in RCTs, functional outcomes such as International Knee Documentation Committee (IKDC) subjective score, Lysholm score, Tegner activity scale, Knee Society Score, and hop test were found to be similar between 2 techniques. The laxity outcomes, including the IKDC objective grade and pivot-shift test, were suggested to be comparable. There was a significant difference favoring the transtibial technique in terms of side-to-side difference (P = .04; 95% confidence interval [CI], 0.08-0.90). The pooled data from cohort studies indicated equivalent results in terms of IKDC subjective score, Lysholm score, side-to-side difference, IKDC objective grade, complications, and graft failure, with the exception of statistical difference in the Tegner activity scale (P = .03; 95% CI, -0.50 to -0.04). CONCLUSIONS Our findings suggest that there is no difference in most outcome scores between the all-inside and transtibial techniques for anterior cruciate ligament reconstruction. There are statistically significant differences in side-to-side difference and Tegner activity scale favoring the all-inside technique. LEVEL OF EVIDENCE Level IV, meta-analysis of Level I to IV studies.
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Affiliation(s)
- Shuang Zhu
- Department of Orthopaedics, Southern Medical University Zhujiang University, Guangzhou, China
| | - Renbin Li
- Department of Orthopaedics, Southern Medical University Zhujiang University, Guangzhou, China.
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Yang CP, Chen MZ, Wang CL, Chao-Yu Chen A, Hsu KY, Chan YS, Chiu JCH. Double-bundle ACL combined with ALL reconstruction for patients at high risk of ACL failure: clinical and radiological results. BMC Musculoskelet Disord 2024; 25:594. [PMID: 39069639 DOI: 10.1186/s12891-024-07703-8] [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: 12/22/2023] [Accepted: 07/18/2024] [Indexed: 07/30/2024] Open
Abstract
BACKGROUND We investigated whether double-bundle (DB) anterior cruciate ligament (ACL) reconstruction (ACLR) combined with anterolateral ligament reconstruction (ALLR) improved clinical and radiological outcomes in patients at high risk of ACL failure. The primary outcome was graft failure, and secondary outcomes included knee stability and patient-reported outcome measures (PROMs). PATIENTS AND METHODS Fifty-two patients who underwent DB ACLR combined with ALLR were included in this retrospective cohort study. Preoperative risk factors, including femorotibial angle (FTA), lateral tibial slope (LTS), medial tibial slope (MTS), and meniscal tears, were assessed using X-ray and magnetic resonance imaging (MRI). The grade of post-operative pivot shift, Lysholm score, and Tegner activity score were used to assess clinical outcomes. The minimum follow up duration was 2 years. RESULTS The cohort (mean age, 26.1 ± 9.4 years; 51.9% male) had a mean follow-up duration of 28.9 ± 3.4 months. Preoperatively, 57.8% had lateral meniscus (LM) tears, and 61.0% had a grade 2-3 pivot shift. Postoperatively, no graft failures or revision cases occurred during follow-up. Approximately 90.4% of the patients exhibited a negative pivot shift (p < 0.001), with Lysholm and Tegner activity scores of 92.5 ± 6.1 and 5.1 ± 2.0. The medial meniscus (MM) tear group had a significantly smaller FTA than the intact group (p = 0.043). No significant differences in PROMs were found between the LM tear and intact LM groups or between the high and low MTS or LTS groups (p = n.s.). CONCLUSION DB ACLR combined with ALLR had satisfactory clinical outcomes in patients at high risk of ACL failure, with no graft failures observed during a mean follow-up duration of 2.4 years. The technique effectively reduced the postoperative pivot shift, regardless of preoperative risk factors. STUDY DESIGN Level IV, retrospective therapeutic case-series. TRAIL REGISTRATION ethical approval number, 202300134B0; ethical committee, the Institutional Review Board of Chang Gung Medical Foundation.
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Affiliation(s)
- Cheng-Pang Yang
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Linkou, No. 5, Fuxing St., Guishan Dist, Taoyuan City, 33305, Taiwan
| | - Mu-Ze Chen
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Linkou, No. 5, Fuxing St., Guishan Dist, Taoyuan City, 33305, Taiwan
| | - Chih-Li Wang
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Linkou, No. 5, Fuxing St., Guishan Dist, Taoyuan City, 33305, Taiwan
| | - Alvin Chao-Yu Chen
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Linkou, No. 5, Fuxing St., Guishan Dist, Taoyuan City, 33305, Taiwan
| | - Kuo-Yao Hsu
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Linkou, No. 5, Fuxing St., Guishan Dist, Taoyuan City, 33305, Taiwan
| | - Yi-Sheng Chan
- Department of Orthopedic Surgery, Keelung Chang Gung Memorial Hospital, Keelung City, 204, Taiwan
| | - Joe Chih-Hao Chiu
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Linkou, No. 5, Fuxing St., Guishan Dist, Taoyuan City, 33305, Taiwan.
- Bone and Joint Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.
- Comprehensive Sports Medicine Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.
- Chang Gung University, College of Medicine, Taoyuan, Taiwan.
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Nukuto K, Gale T, Yamamoto T, Kamada K, Irrgang JJ, Musahl V, Anderst W. Reliability and changes in knee cartilage T2 relaxation time from 6 to 24 months after anatomic anterior cruciate ligament reconstruction. J Orthop Res 2024. [PMID: 39032093 DOI: 10.1002/jor.25939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 07/02/2024] [Accepted: 07/05/2024] [Indexed: 07/22/2024]
Abstract
The objectives of this study were to evaluate the reliability of cartilage T2 relaxation time measurements and to identify focal changes in T2 relaxation on the affected knee from 6 to 24 months after anatomic anterior cruciate ligament reconstruction (ACLR). Data from 41 patients who received anatomic ACLR were analyzed. A bilateral 3.0-T MRI was acquired 6 and 24 months after ACLR. T2 relaxation time was measured in subregions of the femoral condyle and the tibial plateau. The root-mean-square coefficient of variation (RMSCV) was calculated to evaluate the reliability of T2 relaxation time in the contralateral knee. Subregion changes in the affected knee T2 relaxation time were identified using the contralateral knee as a reference. The superficial and full thickness layers of the central and inner regions showed good reliability. Conversely, the outer regions on the femoral side and regions in the deep layers showed poor reliability. T2 relaxation time increased in only 3 regions on the affected knee when controlling for changes in the contralateral knee, while changes in T2 relaxation time were identified in 14 regions when not using the contralateral knee as a reference. In conclusion, evaluation of cartilage degeneration by T2 relaxation time after ACLR is most reliable for central and inner cartilage regions. Cartilage degeneration occurs in the central and outer regions of the lateral femoral condyle from 6 to 24 months after anatomic ACLR.
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Affiliation(s)
- Koji Nukuto
- Department of Orthopedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
- Biodynamics Laboratory, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Tom Gale
- Biodynamics Laboratory, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Tetsuya Yamamoto
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kohei Kamada
- Department of Orthopedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
- Biodynamics Laboratory, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - James J Irrgang
- Department of Orthopedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
- Department of Physical Therapy, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Volker Musahl
- Department of Orthopedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - William Anderst
- Biodynamics Laboratory, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Yahagi Y, Iriuchishima T, Iwama G, Suruga M, Nakanishi K. Femoral Tunnel Position in Anatomical Double-bundle ACL Reconstruction is not Affected by Blumensaat's Line Morphology. J Knee Surg 2024; 37:674-679. [PMID: 38336111 DOI: 10.1055/a-2265-9586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2024]
Abstract
The aim of this study was to reveal the influence of the morphological variations of the Blumensaat's line on anteromedial (AM) and posterolateral (PL) femoral tunnel position in anatomical double-bundle anterior cruciate ligament (ACL) reconstruction.Fifty-three subjects undergoing anatomical double-bundle ACL reconstruction were included (29 female, 24 male; median age 27.4 years; range: 14-50 years). Using an inside-out transportal technique, the PL tunnel position was made on a line drawn vertically from the bottommost point of the lateral condyle at 90 degrees of knee flexion, spanning a distance of 5 to 8 mm, to the edge of the joint cartilage. AM tunnel position was made 2 mm distal to the PL tunnel position. Following Iriuchishima's classification, the morphology of the Blumensaat's line was classified into straight and hill (large and small) types. Femoral tunnel position was determined using the quadrant method. A Mann-Whitney U test was performed to compare straight and hill type knees according to AM and PL femoral tunnel position.There were 18 straight and 35 hill type knees (13 small and 22 large hill). AM and PL femoral tunnel position in straight type knees were 21.7 ± 7.0 and 33.6 ± 10.5% in the shallow-deep direction, and 42.1 ± 11.1 and 72.1 ± 8.5% in the high-low direction, respectively. In hill type knees, AM and PL femoral tunnel position were 21.3 ± 5.8 and 36.9 ± 7.1% in the shallow-deep direction, and 44.6 ± 10.7 and 72.1 ± 9.7% in the high-low direction, respectively. No significant difference in AM or PL femoral tunnel position was detected between straight and hill type knees.AM and PL femoral tunnel position in anatomical double-bundle ACL reconstruction was not affected by the morphological variations of the Blumensaat's line. Surgeons do not need to consider Blumensaat's line morphology if AM and PL femoral tunnel position is targeted at the bottommost point of the lateral condyle. This was a level of evidence III study.
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Affiliation(s)
- Yoshiyuki Yahagi
- Department of Orthopaedic Surgery, Nihon University Itabashi Hospital, Tokyo, Japan
| | - Takanori Iriuchishima
- Department of Orthopaedic Surgery, Kamimoku Spa Hospital, Minakami, Japan
- Department of Functional Morphology, Nihon University School of Medicine, Tokyo, Japan
| | - Genki Iwama
- Department of Orthopaedic Surgery, Nihon University Itabashi Hospital, Tokyo, Japan
| | - Makoto Suruga
- Department of Orthopaedic Surgery, Nihon University Hospital, Tokyo, Japan
| | - Kazuyoshi Nakanishi
- Department of Orthopaedic Surgery, Nihon University Itabashi Hospital, Tokyo, Japan
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Yahagi Y, Gale T, Nukuto K, Irrgang J, Musahl V, Anderst W. Tibial spine volume is smaller in ACL-injured athletes compared to healthy athletes. Knee Surg Sports Traumatol Arthrosc 2024; 32:1370-1375. [PMID: 38529659 DOI: 10.1002/ksa.12161] [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: 12/23/2023] [Revised: 02/24/2024] [Accepted: 02/28/2024] [Indexed: 03/27/2024]
Abstract
PURPOSE The aim of this study was to investigate whether the whole tibial spine volume and femoral intercondylar notch volume are risk factors for anterior cruciate ligament (ACL) injury. The hypothesis was that the whole tibial spine volume and femoral notch volume would be smaller in athletes who sustained ACL injury than in athletes with no history of ACL injury. METHODS Computed tomography scans of both knees were acquired and three-dimensional bone models were created using Mimics to measure whole tibial spine volume and femoral notch volume. Tibial spine volume, femoral notch volume and each of these volumes normalised by tibial plateau area were compared between the ACL-injured and the ACL-intact group. RESULTS Fifty-one athletes undergoing unilateral anatomical ACL reconstruction (17 female, 34 male: average age 22.0 ± 7.5) and 19 healthy collegiate athletes with no previous knee injury (eight female, 11 male: average age 20.1 ± 1.3) were included in this study. The whole tibial spine volume in the ACL-injured group (2.1 ± 0.5 cm3) was 20.7% smaller than in the ACL-intact group (2.7 ± 0.7 cm3) (p = 0.005). No differences were observed between the femoral notch volume in the ACL-injured group (9.5 ± 2.1 cm3) and the ACL-intact group (8.7 ± 2.7 cm3) (n.s.). CONCLUSIONS The main finding of this study was that the whole tibial spine volume of the ACL-injured group was smaller than the ACL-intact group. A small tibial spine volume can be added to the list of anatomical risk factors that may predispose athletes to ACL injury. LEVEL OF EVIDENCE Level Ⅲ.
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Affiliation(s)
- Yoshiyuki Yahagi
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Biodynamics Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Tom Gale
- Biodynamics Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Koji Nukuto
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Biodynamics Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - James Irrgang
- Department of Physical Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Volker Musahl
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - William Anderst
- Biodynamics Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Entezari B, Lex JR, Peck J, Igbokwe EN, Kubik JF, Backstein DJ, Wolfstadt JI. Intraoperative and Postoperative Outcomes of Patients Undergoing Total Knee Arthroplasty With Prior Anterior Cruciate Ligament Reconstruction: A Matched Cohort Analysis. Arthroplast Today 2024; 27:101330. [PMID: 39071823 PMCID: PMC11282402 DOI: 10.1016/j.artd.2024.101330] [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: 08/23/2023] [Revised: 12/11/2023] [Accepted: 01/27/2024] [Indexed: 07/30/2024] Open
Abstract
Background Previous anterior cruciate ligament (ACL) injury is a risk factor for the development of knee osteoarthritis. Despite advances in ACL reconstruction (ACLR) techniques, many patients with history of ACLR develop end-stage osteoarthritis necessitating total knee arthroplasty (TKA). The purpose of this study was to investigate the impact of prior ACLR on intraoperative and postoperative outcomes of TKA. Methods This was a single-centre matched cohort study of all patients with prior ACLR undergoing primary TKA from January 2000 to May 2022. Patients were matched 1:1 to patients undergoing TKA with no prior ACL injury based on age, sex, and body mass index. Outcomes investigated included TKA procedure duration, soft-tissue releases, implant design, and complications requiring reoperation. Results Forty-two ACLR patients were identified and matched to controls. Mean follow-up was 6.8 years and 5.0 years in the ACLR and control cohorts, respectively (P = .115). ACLR patients demonstrated longer procedure durations (122.8 minutes vs 87.0 minutes, P < .001) and more frequently required soft-tissue releases (40.5% vs 14.3%, P = .007), stemmed implants (23.8% vs 4.8%, P = .013), and patellar resurfacing (59.5% vs 26.2%, P = .002). There were no significant differences in postoperative clinical or surgical outcomes between groups. Ten-year implant survivorship was 92% and 95% in the ACLR and control cohorts, respectively (P = .777). Conclusions TKA is an effective procedure for the management of end-stage osteoarthritis with prior ACLR. The care team should be prepared for longer operative times and the utilization of advanced techniques to achieve satisfactory soft-tissue balance and implant stability.
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Affiliation(s)
- Bahar Entezari
- Granovsky Gluskin Division of Orthopaedics, Mount Sinai Hospital, Toronto, ON, Canada
- Queen’s University School of Medicine, Kingston, ON, Canada
| | - Johnathan R. Lex
- Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Jonathan Peck
- Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Emmanuel N. Igbokwe
- Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Jeremy F. Kubik
- Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - David J. Backstein
- Granovsky Gluskin Division of Orthopaedics, Mount Sinai Hospital, Toronto, ON, Canada
- Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Jesse I. Wolfstadt
- Granovsky Gluskin Division of Orthopaedics, Mount Sinai Hospital, Toronto, ON, Canada
- Division of Orthopaedic Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
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Hung YC, Chuang CA, Yao SY, Lin KY, Hung SF, Chen YJ, Chiu CH, Ho CS, Yang CP, Chan YS. Correlation between higher lateral tibial slope and inferior long term subjective outcomes following single bundle anterior cruciate ligament reconstruction. J Orthop Surg Res 2024; 19:315. [PMID: 38807173 PMCID: PMC11131331 DOI: 10.1186/s13018-024-04795-9] [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: 03/14/2024] [Accepted: 05/14/2024] [Indexed: 05/30/2024] Open
Abstract
BACKGROUND The impact of anatomical factors, such as the lateral tibial slope (LTS), on outcomes following anterior cruciate ligament (ACL) reconstruction is an area of growing interest. This study was led by the observation that patients with a higher LTS may have different recovery trajectories. HYPOTHESIS/PURPOSE The purpose of this study was to investigate the correlation between a higher LTS and long term subjective outcomes following single-bundle ACL reconstruction. STUDY DESIGN This study was designed as a retrospective cohort study. METHODS The study comprised 138 patients who underwent single-bundle ACL reconstruction. The LTS was measured on preoperative radiographs. Patient-reported outcome measures (PROMs) were collected, which included the Lysholm Knee Score, UCLA Activity Score, IKDC Score, and Tegner Activity Score, over a mean follow-up duration of 137 months. RESULTS A significant negative correlation was found between LTS and all measured PROMs (p < 0.001). The established cut-off value of LTS distinguishing between "Good" and "Fair" Lysholm scores was 8.35 degrees. Female patients have statistically significant higher LTS and lower PROMs scores than male. Patients with LTS greater than or equal to 8.35 had significantly lower PROMs, indicative of poorer functional and subjective outcomes. CONCLUSION Our findings suggest that a higher LTS is associated with inferior subjective outcomes following single-bundle ACL reconstruction in long term. The LTS cut-off value of 8.35 degrees could potentially be used as a reference in preoperative planning and patient counseling. CLINICAL RELEVANCE Understanding the relationship between LTS and ACL reconstruction outcomes could inform surgical planning and postoperative management. These findings highlight the need to consider anatomical variances, such as LTS, when assessing patient-specific risks and recovery expectations, contributing to the advancement of personalized care in sports medicine.
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Affiliation(s)
- Yu-Chieh Hung
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Chieh-An Chuang
- Comprehensive Sports Medicine Center, Taoyuan Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Shang-Yu Yao
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Keng-Yi Lin
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Shih-Feng Hung
- Department of Orthopedic Surgery, Taoyuan Hospital, Ministry of Health and Welfare, Taoyuan City, 333, Taiwan
| | - Yi-Jou Chen
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Chih-Hao Chiu
- Comprehensive Sports Medicine Center, Taoyuan Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Chin-Shan Ho
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan City, 333, Taiwan
| | - Cheng-Pang Yang
- Comprehensive Sports Medicine Center, Taoyuan Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan.
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan.
| | - Yi-Sheng Chan
- Department of Orthopedic Surgery, Keelung Chang Gung Memorial Hospital, Keelung City, 204, Taiwan.
- Comprehensive Sports Medicine Center, Taoyuan Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan.
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan.
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Yamasaki S, Hashimoto Y, Iida K, Han C, Kinoshita T, Nishino K, Nishida Y, Takigami J, Nakamura H. Quadriceps Tendon With Bone Autograft Has Better Stability and Magnetic Resonance Imaging Maturation Than Hamstring Tendon Autograft After Anterior Cruciate Ligament Reconstruction in Patients With Knee Hyperextension. Arthroscopy 2024; 40:1234-1244. [PMID: 37597704 DOI: 10.1016/j.arthro.2023.08.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 07/22/2023] [Accepted: 08/10/2023] [Indexed: 08/21/2023]
Abstract
PURPOSE To compare the clinical outcomes of anterior cruciate ligament (ACL) reconstruction between methods using quadriceps tendon with bone (QTB) and hamstring tendon (HT) in patients with hyperextension of the knee. METHODS The medical records of patients with knee hyperextension greater than 8° who underwent arthroscopic ACL reconstruction between October 2010 and October 2020 with follow-up for at least 2 years (median, 3 years; interquartile range [IQR], 2.0-4.6 years) were retrospectively reviewed. Side-to-side difference in anterior translation, pivot-shift test grade, Lysholm score, and graft intensity using the Howell grade on magnetic resonance imaging at final follow-up were compared between the QTB and HT groups. RESULTS The HT and QTB groups consisted of 42 patients and 21 patients, respectively. The overall mean age was 21.5 years (range, 14-48 years), and the median Tegner Activity Scale score was 6 (range, 3-9). Postoperatively, the median side-to-side difference in anterior translation was 1.75 mm (IQR, 1-3 mm) in the HT group and 1.0 mm (IQR, 0-1.75 mm) in the QTB group (P = .01). Pivot-shift testing showed grade 0 in 74.7%, grade 1 in 18.7%, and grade 2 in 6.6% of patients in the HT group and grade 0 in 85.7% and grade 1 in 14.3% of those in the QTB group (P = .03). The median postoperative Lysholm score was 99 in both groups. Graft signal intensity showed a significant between-group difference: grade I in 52%, grade II in 36%, and grade III in 12% of patients in the HT group versus grade I in 85.7%, grade II in 9.5%, and grade III in 4.8% of those in the QTB group (P = .03). CONCLUSIONS In patients who underwent ACL reconstruction for hyperextension of the knee, QTB yielded better clinical outcomes than HT with respect to anterior stability, rotational stability, and graft signal intensity on median 2-year follow-up magnetic resonance imaging. LEVEL OF EVIDENCE Level III, retrospective case-control study.
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Affiliation(s)
- Shinya Yamasaki
- Department of Orthopaedic Surgery, Osaka City General Hospital, Osaka, Japan.
| | - Yusuke Hashimoto
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Ken Iida
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Changhun Han
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Takuya Kinoshita
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Kazuya Nishino
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Yohei Nishida
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Junsei Takigami
- Department of Orthopaedic Surgery, Shimada Hospital, Osaka, Japan
| | - Hiroaki Nakamura
- Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
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10
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Miyamoto K, Kurokouchi K, Ishizuka S, Takahashi S, Tsukahara T, Kawai R, Sakai T, Oba H, Sakaguchi T, Imagama S. Double-bundle anterior cruciate ligament reconstruction in patients aged 60 years and older. Asia Pac J Sports Med Arthrosc Rehabil Technol 2024; 35:71-75. [PMID: 38235499 PMCID: PMC10793088 DOI: 10.1016/j.asmart.2023.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 10/08/2023] [Accepted: 11/27/2023] [Indexed: 01/19/2024] Open
Abstract
Background This study aimed to examine the clinical outcomes of double-bundle (DB) anterior cruciate ligament (ACL) reconstruction in patients aged ≥60 years. Methods Anatomical DB-ACL reconstruction using hamstring tendon autografts was performed in 13 patients aged ≥60 years at our institution between June 2012 and May 2018. The patients included seven men and six women, and the mean age at surgery was 65.0 years (range, 60-73 years). The mean time from injury to surgery was 80.5 months (range, 1-480 months), and the mean follow-up time was 26.2 months (range, 24-42 months). All patients were assessed based on physical examination findings, clinical scores, Kellgren-Lawrence grades preoperatively and at the final postoperative follow-up, intraoperative meniscal or chondral lesions, and perioperative complications. Status of returning to sports for all patients was assessed at the final follow-up. Results The mean side-to-side differences by arthrometer improved from 4.3 mm (range, 2-8 mm) to 0.9 mm (range, 0-2 mm), and the positive pivot-shift test decreased from 100% to 8%. The mean extensor muscle strength was 93.3% (range, 74-116%) postoperatively. The mean Lysholm score improved from 71.1 (range, 27-85) to 95.2 (range, 89-100). Ten of the 13 patients (77%) returned to their pre-injury level of sports performance, and one patient (8%) returned to sports with less intensity. Intraoperatively, meniscal tears were observed in 10 patients (77%), and chondral lesions >grade 2 were observed in 11 (85%). One patient developed perioperative complications. At the final follow-up, the Kellgren-Lawrence grade worsened in only one patient. No re-injury or infection was observed, and revision surgery was not required for any patients. Conclusions Anatomical DB-ACL reconstruction could provide satisfactory clinical outcomes and knee function restoration in patients aged ≥60 years. Level of evidence A retrospective study, case series (IV).
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Affiliation(s)
- Kentaro Miyamoto
- Department of Orthopaedic Surgery and Arthroscopy Centre, Juko Memorial Hospital, Nagoya, Japan
| | - Kazutoshi Kurokouchi
- Department of Orthopaedic Surgery and Arthroscopy Centre, Juko Memorial Hospital, Nagoya, Japan
| | - Shinya Ishizuka
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shigeo Takahashi
- Department of Orthopaedic Surgery and Arthroscopy Centre, Juko Memorial Hospital, Nagoya, Japan
| | - Takashi Tsukahara
- Department of Orthopaedic Surgery, Murakami Memorial Hospital, Asahi University, Gifu, Japan
| | - Ryosuke Kawai
- Department of Orthopaedic Surgery, Murakami Memorial Hospital, Asahi University, Gifu, Japan
| | - Tadahiro Sakai
- Department of Orthopaedic Surgery, Toyota Memorial Hospital, Toyota, Japan
| | - Hiroki Oba
- Department of Orthopaedic Surgery and Arthroscopy Centre, Juko Memorial Hospital, Nagoya, Japan
| | - Takefumi Sakaguchi
- Department of Orthopaedic Surgery and Arthroscopy Centre, Juko Memorial Hospital, Nagoya, Japan
| | - Shiro Imagama
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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11
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Murakami R, Taketomi S, Yamagami R, Kono K, Kawaguchi K, Kage T, Arakawa T, Inui H, Tanaka S. Postoperative quadriceps weakness and male sex are risk factors for patellofemoral articular cartilage lesions after anatomical anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol Arthrosc 2023; 31:5681-5689. [PMID: 37884728 PMCID: PMC10719126 DOI: 10.1007/s00167-023-07633-3] [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: 05/30/2023] [Accepted: 10/11/2023] [Indexed: 10/28/2023]
Abstract
PURPOSE Patellofemoral (PF) compartment cartilage lesions are a frequent problem after anterior cruciate ligament (ACL) reconstruction. This study aimed to determine the factors that influence PF cartilage lesions after anatomical ACL reconstruction. METHODS This study enrolled a total of 114 patients who did not manifest PF compartment cartilage lesions during anatomical ACL reconstruction and underwent second-look arthroscopy 18 months postoperatively. Arthroscopy using the International Cartilage Repair Society (ICRS) classification was used to assess cartilage lesions. The correlation between surgical findings, radiographic factors, and clinical factors and change of ICRS grade was analysed. Multivariate regression analysis was conducted to reveal the independent risk factors for PF cartilage lesions among patients' demographic data and parameters that correlated with the change of ICRS grade in the correlation analyses. RESULTS ICRS grade changes in PF cartilage were significantly correlated with age, sex, quadriceps strength at 1 year postoperatively, hamstrings strength at pre- and 1 year postoperatively, and single leg hop test at 1 year postoperatively. However, no significant correlation was found between the time between injury and surgery, posterior tibial slope angle, pre- and postoperative Tegner activity scale, graft type, initial graft tension, meniscus injury, meniscus injury treatment, pre- and postoperative range of motion, anteroposterior laxity and preoperative quadriceps strength, and the change in ICRS grade. Multivariate regression analysis revealed male (P = 0.019) and quadriceps strength weakness at 1 year postoperatively (P = 0.009) as independent risk factors for PF cartilage lesions. CONCLUSIONS Quadriceps strength weakness 1 year after ACL reconstruction and males were correlated with a new PF cartilage lesion after anatomical ACL reconstruction, with no significant correlation between bone-patellar tendon-bone autograft, initial graft tension, or extension deficit and new PF cartilage lesion. Rehabilitation that focuses on quadriceps strength after ACL reconstruction is recommended to prevent new PF cartilage lesions. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Ryo Murakami
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Shuji Taketomi
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
| | - Ryota Yamagami
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Kenichi Kono
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Kohei Kawaguchi
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Tomofumi Kage
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Takahiro Arakawa
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Hiroshi Inui
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Sakae Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
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12
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Lin J, Zhang S, Xin E, Liang M, Yang L, Chen J. Anterior cruciate ligament femoral footprint is oblong-ovate, triangular, or two-tears shaped in healthy young adults: three-dimensional MRI analysis. Knee Surg Sports Traumatol Arthrosc 2023; 31:5514-5523. [PMID: 37828405 DOI: 10.1007/s00167-023-07606-6] [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: 05/11/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023]
Abstract
PURPOSE This study aimed to evaluate the morphology of the anterior cruciate ligament (ACL) femoral footprint with three-dimensional magnetic resonance imaging (3D MRI) in healthy knees. METHODS Fifty subjects with healthy knees were recruited, utilising 3D-SPACE sequences for ACL evaluation. The ACL was manually segmented, and the shape, size and location of the ACL femoral footprint were evaluated on a reformatted oblique-sagittal plane, which aligned closely with the ACL attachment. Statistical analysis included one-way ANOVA for continuous variables and Fisher's exact test for categorical variables, with a P value < 0.05 considered significant. RESULTS Three types of ACL femoral footprint shape were identified, namely, oblong-ovate (OO) in 33 knees (66%), triangular (Tr) in 12 knees (24%) and two-tears (TT) in 5 knees (10%), with the mean areas being 58, 47 and 68 mm2, respectively. Within group TT, regions with similar sizes but different locations were identified: high tear (TT-H) and low tear (TT-L). Notably, group OO demonstrated a larger notch height index, whilst group TT was characterised by a larger α angle and lateral femoral condyle index. A noticeable variation was observed in the location of the femoral footprint centre across groups, with group TT-L and group Tr showing a more distal position relative to the apex of the deep cartilage. According to the Bernard and Hertel (BH) grid, the ACL femoral footprint centres in group TT-L exhibited a shallower and higher position than other groups. Furthermore, compared to group OO and TT-H, group Tr showed a significantly higher position according to the BH grid. CONCLUSION In this study, the morphology of the ACL femoral footprint in healthy young adults was accurately evaluated using 3D MRI, revealing three distinct shapes: OO, Tr and TT. The different ACL femoral footprint types showed similar areas but markedly different locations. These findings emphasise the necessity of considering both the shape and precise location of the ACL femoral footprint during clinical assessments, which might help surgeons enhance patient-specific surgical plans before ACL reconstruction. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Jinrong Lin
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
| | - Shurong Zhang
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
| | - Enhui Xin
- Department of Radiology, Huashan Hospital, Fudan University, 12 Wulumuqi Middle Road, Jing'an District, Shanghai, 200040, People's Republic of China
| | - Meng Liang
- Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD, UK
| | - Liqin Yang
- Department of Radiology, Huashan Hospital, Fudan University, 12 Wulumuqi Middle Road, Jing'an District, Shanghai, 200040, People's Republic of China.
| | - Jiwu Chen
- Department of Sports Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, 100 Haining Road, Hongkou District, Shanghai, 200080, People's Republic of China.
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13
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Herbst E, Costello J, Popchak AJ, Tashman S, Irrgang JJ, Fu FH, Musahl V. Untreated Injuries to the Anterolateral Capsular Structures Do Not Affect Outcomes and Kinematics after Anatomic Anterior Cruciate Ligament Reconstruction. J Clin Med 2023; 12:4408. [PMID: 37445441 DOI: 10.3390/jcm12134408] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/11/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
BACKGROUND Injuries to the anterolateral complex (ALC) may contribute to increased rotatory knee laxity. However, it has not been evaluated whether such injuries affect in vivo kinematics when treated in situ. The purpose of this study was to determine the grade of ALC injury and its effect on kinematic and clinical outcomes of ACL-injured patients 24 months after anatomic ACL reconstruction. It was hypothesized that injury to the ALC would be significantly related to patient-reported outcomes (PROs) and in vivo knee kinematics during downhill running. METHODS Thirty-five subjects (mean age: 22.8 ± 8.5 years) participating in a randomized clinical trial to compare single- and double-bundle ACL reconstruction were included in the study. Subjects were divided into two groups based on the presence or absence of injury to the ALC, as determined on MRI scans performed within 6 weeks of injury. None of the patients underwent treatment for these ALC injuries. At 24 months, PROs, including the International Knee Documentation Committee Subjective Knee Form (IKDC-SKF), Knee injury and Osteoarthritis Outcome Score (KOOS) and in vivo knee kinematics during downhill running, were obtained. Pivot-shift test results, PROs and in vivo knee kinematics were compared between groups with and without ALC injury using the Pearson's Chi Squared test and Mann-Whitney U test with significance set at p < 0.05. RESULTS The average interval between injury and performing the MRI scans was 9.5 ± 10 days. ALC injury was observed in 17 (49%) study participants. No significant differences were detected in PROs and in vivo kinematics between subjects with and without ALC injury (n.s.). CONCLUSION The findings of this study demonstrate that MRI evidence of an ALC injury does not significantly affect in vivo knee kinematics and PROs even in individuals with a high-grade ALC injury. Injuries to the ALC as observed on MRI might not be a useful indication for an anterolateral procedure.
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Affiliation(s)
- Elmar Herbst
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
- Department of Trauma-, Hand- and Reconstructive Surgery, University Hospital Muenster, 48149 Münster, Germany
| | - Joanna Costello
- Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
| | - Adam J Popchak
- Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Scott Tashman
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
- Steadman Philippon Research Institute, Vail, CO 81657, USA
| | - James J Irrgang
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
- Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Freddie H Fu
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
| | - Volker Musahl
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, USA
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14
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Lording TD. Review of Cha et al. (2005) on "Arthroscopic Double Bundle Anterior Cruciate Ligament Reconstruction: An Anatomical Approach". J ISAKOS 2023; 8:140-144. [PMID: 36924827 DOI: 10.1016/j.jisako.2023.02.005] [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: 06/08/2022] [Revised: 01/20/2023] [Accepted: 02/16/2023] [Indexed: 03/17/2023]
Abstract
This classic discusses the original publication 'Arthroscopic double-bundle anterior cruciate ligament reconstruction (ACL): An anatomical approach', the first detailed description of the surgical technique popularised by Dr Freddie Fu. The technique, in which the anteromedial and posterolateral bundles of the ACL are reconstructed individually using two grafts with independent bone tunnels, was designed to more closely recreate the function of the native ACL by more closely reproducing the functional anatomy. This reconstruction was biomechanically superior to single-bundle reconstruction, particularly with regards to rotational control, leading to great interest from ACL surgeons around the world. Clinical superiority was more difficult to demonstrate; however, and the technical difficulty of the procedure has limited its use. Nevertheless, the pursuit of improved patient outcomes through attention to functional anatomical detail continues. 'Recreating the functional anatomy of the intact ACL remains the cornerstone of ACL reconstruction'.
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Affiliation(s)
- Timothy D Lording
- Melbourne Orthopaedic Group, Windsor, 3181, Australia; Monash University, Melbourne, 3800, Australia.
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15
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Runer A, Keeling L, Wagala N, Nugraha H, Özbek EA, Hughes JD, Musahl V. Current trends in graft choice for primary anterior cruciate ligament reconstruction - part II: In-vivo kinematics, patient reported outcomes, re-rupture rates, strength recovery, return to sports and complications. J Exp Orthop 2023; 10:40. [PMID: 37014518 PMCID: PMC10073382 DOI: 10.1186/s40634-023-00601-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/22/2023] [Indexed: 04/05/2023] Open
Abstract
Postoperative patient satisfaction after anterior cruciate ligament reconstruction (ACL-R) is influenced mainly by the degree of pain, the need for reoperation, and functional performance in daily activities and sports. Graft choice has shown to have an influence on postoperative outcomes after ACL-R. While patient reported outcomes measurements do not differ between graft options, evidence shows that normal knee kinematics is not fully restored after ACL-R with an increase in postoperative anterior tibial translation (ATT). Postoperative graft rupture rates seem to favor bone-patella-tendon-bone (BPTB) and quadriceps tendon (QT) autografts over HT or allografts. While return to sports rates seem comparable between different graft types, postoperative extensor strength is reduced in patients with BPTB and QT whereas flexion strength is weakened in patients with HT. Postoperative donor site morbidity is highest in BPTB but comparable between HT and QT. With all graft options having advantages and drawbacks, graft choice must be individualized and chosen in accordance with the patient.
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Affiliation(s)
- Armin Runer
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA.
- Department for Sports Orthopaedics, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany.
| | - Laura Keeling
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nyaluma Wagala
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hans Nugraha
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopaedic and Traumatology, Faculty of Medicine, University of Udayana, / Prof. Dr. I.G.N.G. Ngoerah General Hospital, Denpasar, Bali, Indonesia
| | - Emre Anil Özbek
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopedics and Traumatology, Ankara University, Ankara, Turkey
| | - Jonathan D Hughes
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Volker Musahl
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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16
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Menghini D, Kaushal SG, Flannery SW, Ecklund K, Murray MM, Fleming BC, Kiapour AM, Proffen B, Sant N, Portilla G, Sanborn R, Freiberger C, Henderson R, Barnett S, Yen YM, Kramer DE, Micheli LJ. Changes in the Cross-Sectional Profile of Treated Anterior Cruciate Ligament Within 2 Years After Surgery. Orthop J Sports Med 2022; 10:23259671221127326. [PMID: 36263311 PMCID: PMC9575446 DOI: 10.1177/23259671221127326] [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: 07/18/2022] [Accepted: 08/02/2022] [Indexed: 11/07/2022] Open
Abstract
Background: The cross-sectional area (CSA) of the anterior cruciate ligament (ACL) and
reconstructed graft has direct implications on its strength and knee
function. Little is known regarding how the CSA changes along the ligament
length and how those changes vary between treated and native ligaments over
time. Hypothesis: It was hypothesized that (1) the CSA of reconstructed ACLs and restored ACLs
via bridge-enhanced ACL restoration (BEAR) is heterogeneous along the
length. (2) Differences in CSA between treated and native ACLs decrease over
time. (3) CSA of the surgically treated ACLs is correlated significantly
with body size (ie, height, weight, body mass index) and knee size (ie,
bicondylar and notch width). Study Design: Cohort study; Level of evidence, 2. Methods: Magnetic resonance imaging scans of treated and contralateral knees of 98
patients (n = 33 ACL reconstruction, 65 BEAR) at 6, 12, and 24 months
post-operation were used to measure the ligament CSA at 1% increments along
the ACL length (tibial insertion, 0%; femoral insertion, 100%). Statistical
parametric mapping was used to evaluate the differences in CSA between 6 and
24 months. Correlations between body and knee size and treated ligament CSA
along its length were also assessed. Results: Hamstring autografts had larger CSAs than native ACLs at all time points
(P < .001), with region of difference decreasing
from proximal 95% of length (6 months) to proximal 77% of length (24
months). Restored ACLs had larger CSAs than native ACLs at 6 and 12 months,
with larger than native CSA only along a small midsubstance region at 24
months (P < .001). Graft CSA was correlated
significantly with weight (6 and 12 months), bicondylar width (all time
points), and notch width (24 months). Restored ACL CSA was significantly
correlated with bicondylar width (6 months) and notch width (6 and 12
months). Conclusion: Surgically treated ACLs remodel continuously within the first 2 years after
surgery, leading to ligaments/grafts with heterogeneous CSAs along the
length, similar to the native ACL. While reconstructed ACLs remained
significantly larger, the restored ACL had a CSA profile comparable with
that of the contralateral native ACL. In addition to size and morphology
differences, there were fundamental differences in factors contributing to
CSA profile between the ACL reconstruction and BEAR procedures. Registration: NCT 02664545 (ClinicalTrials.gov
identifier).
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Affiliation(s)
| | | | | | | | | | | | | | - Ata M. Kiapour
- Ata M. Kiapour PhD, MMSc, Department of Orthopedic Surgery,
Boston Children’s Hospital, Harvard Medical School, 300 Longwood Avenue, Boston,
MA 02115, USA (
)
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Saueressig T, Braun T, Steglich N, Diemer F, Zebisch J, Herbst M, Zinser W, Owen PJ, Belavy DL. Primary surgery versus primary rehabilitation for treating anterior cruciate ligament injuries: a living systematic review and meta-analysis. Br J Sports Med 2022; 56:1241-1251. [PMID: 36038357 DOI: 10.1136/bjsports-2021-105359] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2022] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Compare the effectiveness of primarily surgical versus primarily rehabilitative management for anterior cruciate ligament (ACL) rupture. DESIGN Living systematic review and meta-analysis. DATA SOURCES Six databases, six trial registries and prior systematic reviews. Forward and backward citation tracking was employed. ELIGIBILITY CRITERIA Randomised controlled trials that compared primary reconstructive surgery and primary rehabilitative treatment with or without optional reconstructive surgery. DATA SYNTHESIS Bayesian random effects meta-analysis with empirical priors for the OR and standardised mean difference and 95% credible intervals (CrI), Cochrane RoB2, and the Grading of Recommendations Assessment, Development and Evaluation approach to judge the certainty of evidence. RESULTS Of 9514 records, 9 reports of three studies (320 participants in total) were included. No clinically important differences were observed at any follow-up for self-reported knee function (low to very low certainty of evidence). For radiological knee osteoarthritis, we found no effect at very low certainty of evidence in the long term (OR (95% CrI): 1.45 (0.30 to 5.17), two studies). Meniscal damage showed no effect at low certainty of evidence (OR: 0.85 (95% CI 0.45 to 1.62); one study) in the long term. No differences were observed between treatments for any other secondary outcome. Three ongoing randomised controlled trials were identified. CONCLUSIONS There is low to very low certainty of evidence that primary rehabilitation with optional surgical reconstruction results in similar outcome measures as early surgical reconstruction for ACL rupture. The findings challenge a historical paradigm that anatomic instability should be addressed with primary surgical stabilisation to provide optimal outcomes. PROSPERO REGISTRATION NUMBER CRD42021256537.
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Affiliation(s)
- Tobias Saueressig
- Science and Research, Physio Meets Science GmbH, Leimen, Baden-Württemberg, Germany
| | - Tobias Braun
- Department of Applied Health Sciences, Division of Physiotherapy, Hochschule für Gesundheit, Bochum, North Rhine-Westphalia, Germany.,HSD Hochschule Döpfer (University of Applied Sciences), Cologne, North Rhine-Westphalia, Germany
| | - Nora Steglich
- Department of Applied Health Sciences, Division of Physiotherapy, Hochschule für Gesundheit, Bochum, North Rhine-Westphalia, Germany
| | | | - Jochen Zebisch
- Science and Research, Physio Meets Science GmbH, Leimen, Baden-Württemberg, Germany
| | - Maximilian Herbst
- Science and Research, Physio Meets Science GmbH, Leimen, Baden-Württemberg, Germany
| | | | - Patrick J Owen
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, VIC, Australia
| | - Daniel L Belavy
- Department of Applied Health Sciences, Division of Physiotherapy, Hochschule für Gesundheit, Bochum, North Rhine-Westphalia, Germany
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18
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Cole WW, Saraf SM, Stamm M, Mulcahey MK. Closure of the Quadriceps Tendon Autograft Harvest Site for Anterior Cruciate Ligament Reconstruction: A Systematic Review. Am J Sports Med 2022:3635465221095233. [PMID: 35658629 DOI: 10.1177/03635465221095233] [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 quadriceps tendon (QT) autograft is a commonly used and effective graft option for anterior cruciate ligament reconstruction (ACLR). Surgical techniques vary, and there is no current standard of care for management of the QT autograft harvest site. PURPOSE To examine the literature on patient-reported outcomes and complications after ACLR with a QT autograft and to further clarify the frequency with which the harvest site is closed and potential biomechanical implications. STUDY DESIGN Systematic review; Level of evidence, 4. METHODS A systematic review according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines was performed using multiple medical databases. Level 1 to 4 studies on patients undergoing ACLR with a QT autograft were included. There were 2 independent reviewers who analyzed all studies. Study quality was analyzed using the methodological index for non-randomized studies checklist. RESULTS Overall, 13 studies with a total of 650 patients were included. The mean patient age for all studies was 31 years (range, 14-59 years) with a mean follow-up of 21.2 months (range, 6-84 months). Of the 13 studies, 12 studies (92%) documented patient sex, comprising 331 female patients (55%) and 274 male patients (45%). There were 8 studies (62%) that reported the use of a bony QT autograft in 273 patients, and 5 studies (38%) reported the use of a soft tissue QT autograft in 377 patients. The graft length harvested was most commonly 7 to 8 cm, while the tendon width harvested was 10 mm. Moreover, 5 studies (38%) did not discuss closure of the harvest site, while 2 studies (15%) only closed the harvest site if a capsular rent was present. The surgical technique for harvest-site closure varied when reported in 7 studies (54%). Good to excellent clinical outcomes were reported in 80% of patients when the harvest site was closed. CONCLUSION Based on the results of this study, there is no consensus on whether the QT defect should be closed after harvesting the graft for ACLR. It has been reported that closure of the harvest site is performed if there is a capsular rent present. Several techniques are utilized to close the QT autograft harvest site; however, it is unclear if there is a difference in outcomes based on the technique used. Future studies should further clarify whether there are any biomechanical and clinical advantages to closing the QT autograft harvest site.
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Affiliation(s)
- Wendell W Cole
- Department of Orthopaedics, Tulane University, New Orleans, Louisiana, USA
| | - Shreya M Saraf
- Department of Orthopaedics, Tulane University, New Orleans, Louisiana, USA
| | - Michaela Stamm
- School of Medicine, Tulane University, New Orleans, Louisiana, USA
| | - Mary K Mulcahey
- Department of Orthopaedics, Tulane University, New Orleans, Louisiana, USA
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Evaluation of anterior cruciate ligament surgical reconstruction through finite element analysis. Sci Rep 2022; 12:8044. [PMID: 35577879 PMCID: PMC9110399 DOI: 10.1038/s41598-022-11601-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 04/21/2022] [Indexed: 11/08/2022] Open
Abstract
Anterior cruciate ligament (ACL) tear is one of the most common knee injuries. The ACL reconstruction surgery aims to restore healthy knee function by replacing the injured ligament with a graft. Proper selection of the optimal surgery parameters is a complex task. To this end, we developed an automated modeling framework that accepts subject-specific geometries and produces finite element knee models incorporating different surgical techniques. Initially, we developed a reference model of the intact knee, validated with data provided by the Open Knee(s) project. This helped us evaluate the effectiveness of estimating ligament stiffness directly from MRI. Next, we performed a plethora of “what-if” simulations, comparing responses with the reference model. We found that (a) increasing graft pretension and radius reduces relative knee displacement, (b) the correlation of graft radius and tension should not be neglected, (c) graft fixation angle of 20\documentclass[12pt]{minimal}
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\begin{document}$$^{\circ }$$\end{document}∘ can reduce knee laxity, and (d) single-versus double-bundle techniques demonstrate comparable performance in restraining knee translation. In most cases, these findings confirm reported values from comparative clinical studies. The numerical models are made publicly available, allowing for experimental reuse and lowering the barriers for meta-studies. The modeling approach proposed here can complement orthopedic surgeons in their decision-making.
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In search of a gold standard for objective clinical outcome: using dynamic biplane radiography to measure knee kinematics. Knee Surg Sports Traumatol Arthrosc 2022; 30:1499-1501. [PMID: 34853896 DOI: 10.1007/s00167-021-06781-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 10/18/2021] [Indexed: 10/19/2022]
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Chu CR. Can we afford to ignore the biology of joint healing and graft incorporation after ACL reconstruction? J Orthop Res 2022; 40:55-64. [PMID: 34314066 DOI: 10.1002/jor.25145] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 06/23/2021] [Accepted: 07/01/2021] [Indexed: 02/04/2023]
Abstract
Anterior cruciate ligament (ACL) reconstruction is successful at restoring stability to return ACL injured patients to high-demand work, sports, and recreational activities. The development of posttraumatic osteoarthritis (OA) in roughly half of patients just 10-15 years after ACLR highlight the need to improve clinical care pathways. Graft failure and reinjury rates, which further increase OA risk, also remain high for younger and more active patients. The biological components of joint recovery and graft incorporation, therefore, impact short- and long-term clinical outcomes. Biochemical and magnetic resonance imaging (MRI) data show substantial compromise of articular cartilage metabolism and matrix composition after ACL injury and reconstructive surgery suggesting a potential need for activity modulation in early recovery. Furthermore, joint recovery is variable with compositional MRI studies showing progressive cartilage degeneration 1 and 2 years after ACLR. Biopsy and MRI studies also show high variability in ACL graft characteristics within the 1st year after ACLR followed by continued graft maturation into the 2nd year and beyond. To improve the care of ACL injured patients, there is a critical need for clinical attention and scientific inquiry into timing the reintroduction of higher load activities in relationship to neuromuscular recovery, joint biology, and graft maturation. In addition to symptomatic and mechanical recovery, development and validation of biological markers for joint and cartilage homeostasis as well as ACL graft healing are needed for personalized decision making on rehabilitation needs, reduction of OA risk, and resumption of athletic, recreational, and vocational activities.
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Affiliation(s)
- Constance R Chu
- Department Orthopaedic Surgery, Stanford University, Stanford, California, USA.,Veterans Affairs Palo Alto Healthcare System, Livermore, California, USA
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Superior results of return to sport after double-bundle versus single-bundle anterior cruciate ligament reconstruction in young active patients. Knee Surg Sports Traumatol Arthrosc 2022; 30:4156-4161. [PMID: 35652951 PMCID: PMC9668923 DOI: 10.1007/s00167-022-07010-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 05/10/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE To compare return to sport and clinical results in young active patients who underwent anatomic single-bundle (SB) versus double-bundle (DB) anterior cruciate ligament reconstruction (ACLR). METHODS Young active patients undergoing SB or DB ACLR from 2017 to 2019 at our institution were retrospectively reviewed. The primary outcome measures were the rate and time to return to sports, with secondary measures including the Lachman test, pivot shift test, Lysholm scores, International Knee Documentation Committee (IKDC) scores and graft rupture. RESULTS The study included a total of 90 patients (DB group, 42; SB group, 48), with a mean follow-up of 27.1 ± 6.1 months. Young active patients who underwent DB ACLR had a higher rate of return to pivoting sports than those who underwent SB ACLR (HR = 2.4; 95% confidence interval [CI]: 1.4, 4.1; p = 0.013). The DB group returned to pivoting sports at a mean ± SD of 11.0 ± 2.9 months compared with 12.7 ± 2.7 months in the SB group (p = 0.01). There was one traumatic failure in the SB group and one contralateral ACL rupture in the DB group. There was no significant difference in the rate and time to return to running, Lachman test, pivot-shift test, Lysholm or IKDC scores in either group. CONCLUSION Both anatomical SB and DB techniques achieved satisfactory clinical outcomes. DB techniques led to superior performance of return to pivoting sports but nonsignificant differences in time and rate of return to running, passive stability measurement, subjective knee function outcome and graft rupture rate in both groups at the 2-year follow-up. The DB ACLR should be considered a viable option to treat young patients with high activity demands. LEVEL OF EVIDENCE III.
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Williams AA, Deadwiler BC, Dragoo JL, Chu CR. Cartilage Matrix Degeneration Occurs within the First Year after ACLR and Is Associated with Impaired Clinical Outcome. Cartilage 2021; 13:1809S-1818S. [PMID: 34894770 PMCID: PMC8804799 DOI: 10.1177/19476035211063856] [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: 05/17/2021] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Anterior cruciate ligament reconstruction (ACLR) has not been shown to decrease the risk for development of post-traumatic osteoarthritis. Magnetic resonance imaging (MRI) T2 mapping can be used to assess cartilage compositional changes. This study tests whether (1) worse cartilage arthroscopic status at ACLR is reflected by higher cartilage T2 values in matched study regions 6 weeks and 1 year after ACLR, and (2) increasing cartilage T2 values between 6 weeks and 1 year after ACLR are associated with worsening patient-reported outcomes. DESIGN Twenty-two participants with ACLR and 26 controls underwent 3T MRI. T2 values in medial and lateral femoral and tibial cartilage were measured at 6 weeks and 1 year after ACLR and compared with arthroscopic grades, Knee injury and Osteoarthritis Outcome Scores (KOOS), and control T2 values. RESULTS Most (59%-86%) cartilage study regions examined by arthroscopy demonstrated intact articular surfaces. Average T2 value increased in 3 of 4 study regions between 6 weeks and 1 year after ACLR (P = .001-.011). T2 value increased (P < .013) even for participants whose cartilage had intact articular surfaces at ACLR. Participants with ACLR who showed greater increases in cartilage T2 values had less improvement to KOOS Quality of Life (P = .009, ρ = -0.62). DISCUSSION Cartilage status assessed arthroscopically at ACLR and by MRI T2 maps 6 weeks later was healthier than cartilage status assessed by MRI T2 maps at 1-year follow-up. Progressive T2 elevations were observed over the first year after ACLR even in patients with arthroscopically intact cartilage at the time of surgery and were associated with reduced improvement in knee quality of life suggesting preosteoarthritis.
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Affiliation(s)
- Ashley A. Williams
- Department of Orthopaedic Surgery,
Stanford University, Stanford, CA, USA
- Veterans Affairs Palo Alto Healthcare
System, Palo Alto, CA, USA
| | | | - Jason L. Dragoo
- Department of Orthopaedics, University
of Colorado, Denver, CO, USA
| | - Constance R. Chu
- Department of Orthopaedic Surgery,
Stanford University, Stanford, CA, USA
- Veterans Affairs Palo Alto Healthcare
System, Palo Alto, CA, USA
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Negrin LL, Zeitler C, Hofbauer M. Patellar Size Variation at the Quadriceps Tendon-Bone Block Harvest Site: A Magnetic Resonance Imaging Study to Evaluate the Safe Zone for Harvesting a Sufficient Bone Block. Am J Sports Med 2021; 49:3850-3858. [PMID: 34672796 DOI: 10.1177/03635465211049226] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Quadriceps tendon (QT) autografts with and without a bone block are the least studied and least used options for anterior cruciate ligament reconstruction surgery. In particular, there is a lack of literature describing patellar anatomy. Until now, guidelines for patellar bone block harvesting have been based solely on personal experience. In this study, we intended to derive recommendations from physical regularities and objective criteria. PURPOSE To determine the maximal, individual-related length and depth of the bone block that can be safely harvested and to provide guidelines to help surgeons make decisions on graft choice. STUDY DESIGN Descriptive laboratory study. METHODS The study group consisted of 50 male participants and 50 female participants (mean age, 29.4 ± 7.9 years) who underwent 3.0-T magnetic resonance imaging of their knee. Patellar height was determined at the center of the middle third of the QT insertion on the patella and the medial and lateral endpoints; the depth was measured at the midpoints of the respective heights. RESULTS The mean width of the QT and the mean thickness were 49.0 ± 7.6 and 7.3 ± 1.0 mm, respectively. The mean patellar thickness in reference to the medial endpoint, the center, and the lateral endpoint was 18.3 ± 2.4, 17.9 ± 2.3, and 15.1 ± 2.3 mm, respectively, whereas the mean patellar height was 35.1 ± 4.1, 36.7 ± 4.2, and 35.1 ± 3.9 mm. In general, the tendon and patellar dimensions were significantly larger in male participants than in female participants (P = .016). CONCLUSION Bone block harvesting, with its depth not exceeding 50% of the patellar thickness and its length accounting for <50% of the patellar height, poses the least risk for a patellar fracture when located medial to midline. If the bone block is excised from the medial half of the central area (the latter is defined by the middle third of the QT insertion), with the outer edge of the saw positioned at the medial border of the central area, a graft of 15 mm length, 10 mm width, and 8 mm depth can be safely harvested in all White male participants and almost all female participants taller than 165 cm, according to our findings. CLINICAL RELEVANCE This is the first study presenting recommendations for patellar bone block harvesting at the quadriceps tendon insertionbased on physical regularities and objective criteria and not on personal experience.
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Affiliation(s)
- Lukas L Negrin
- University Department of Orthopedic and Trauma Surgery, Medical University of Vienna, Vienna, Austria
| | - Cornelia Zeitler
- University Department of Orthopedic and Trauma Surgery, Medical University of Vienna, Vienna, Austria
| | - Marcus Hofbauer
- University Department of Orthopedic and Trauma Surgery, Medical University of Vienna, Vienna, Austria
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