1
|
Yang CP, Hung SF, Lin KY, Hung YC, Chen YJ, Yao SY, Chiu CH, Chan YS. The increased lateral tibial slope may result in inferior long-term clinical outcome after DB-ACL reconstruction. Arch Orthop Trauma Surg 2024; 144:619-626. [PMID: 37962635 PMCID: PMC10822791 DOI: 10.1007/s00402-023-05114-3] [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: 07/11/2023] [Accepted: 10/13/2023] [Indexed: 11/15/2023]
Abstract
PURPOSE To determine if there is a correlation between lateral tibial slope and long-term clinical results in patients who underwent double-bundle ACL reconstruction. METHODS We retrospectively reviewed patients that received double-bundle ACL reconstruction at a single institution by a single surgeon from January 2011 to December 2014. All the magnetic resonance imaging were reviewed and lateral tibial slopes (LTS) were recorded by an experienced surgeon and rechecked by the other two authors of this study that specialized in orthopedic knee surgery. The relationship between PROMs measurement and lateral tibial slope were analyzed. The patients were then separated into two groups (LTS > 7.4° and < 7.4°) according to the previous study. RESULTS A total of 119 patients were enrolled in this study. All enrolled patients were followed for at least 8 years. The PROMS result were negatively correlated with the lateral tibial slope (p values all < 0.001). The patients with high lateral tibial slope had significantly lower PROMS values (Lysholm 94.26 ± 5.61 vs 80.15 ± 8.28, p = 0.013; IKDC 82.99 ± 4.55 vs 70.09 ± 7.15, p = 0.003; Tegner 9.32 ± 0.95 vs 6.85 ± 1.99, p < 0.001). Finally, the LTS cutoff value between patients with "Good" and "Fair" Lysholm score in our study was 7.55 degrees. CONCLUSIONS Patients with high lateral tibial slope may result in inferior long-term subjective outcomes. The using of double-bundle ACL reconstruction along cannot overcome the negative impact caused by steep lateral tibial slope. A lateral tibial slope of 7.55° may be used as a cut-off for a good clinical outcome. LEVEL OF EVIDENCE III retrospective comparative prognostic trial.
Collapse
Affiliation(s)
- 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
| | - Shih-Feng Hung
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
- Department of Orthopedic Surgery, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan City, 333, Taiwan
| | - Keng-Yi Lin
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Yu-Chieh Hung
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City, 333, Taiwan
| | - Yi-Jou Chen
- 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
| | - 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
| | - Yi-Sheng Chan
- Department of Orthopedic Surgery, Keelung Chang Gung Memorial Hospital, No. 222, Mai-Chin Rd, 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.
| |
Collapse
|
2
|
Kasman U, Surucu S, Korkmaz O. Association Between Posterior Tibial Slope and Clinical Outcomes After Isolated Anterior Cruciate Ligament Reconstructions. Cureus 2023; 15:e46679. [PMID: 37942392 PMCID: PMC10629277 DOI: 10.7759/cureus.46679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2023] [Indexed: 11/10/2023] Open
Abstract
Background Increased posterior tibial slope (PTS) is an important risk factor for non-traumatic graft failure and revision surgery after anterior cruciate ligament reconstruction. If a tibial posterior slope is an important factor for graft failure after anterior cruciate ligament reconstruction, does it affect clinical outcomes? This study aimed to evaluate the association between PTS and clinical outcomes after anterior cruciate ligament reconstruction. Material and methods Patients undergoing arthroscopic anterior cruciate ligament reconstruction with hamstring tendons in the clinic were evaluated retrospectively. Inclusion criteria were: patients with at least an 18-month follow-up period who were evaluated with the Tegner Lysholm scoring system, aged between 18 and 40 years, with only an anterior cruciate ligament rupture. PTSs were measured from the lateral radiographs of the knees. The patients were divided into two groups with a PTS of 10° or less. Results The mean Tegner Lysholm score was 86.8 ± 8.9. The mean PTS was 9.7° ± 1.5°. In total, 14 and 15 patients had a PTS of above 10° and below 10°, respectively. The mean age and follow-up time of patients were 28.5 ± 5.3 years and 24.6 ± 7.2 months in the group with a PTS of above 10° and 30.2 ± 5.3 years and 24.2 ± 5.18 months in the group with a PTS of below 10°, respectively. Tegner Lysholm scores were 88.2 ± 8.8 and 85.6 ± 9.1 in the group with values above 10° and below 10°, respectively. Statistically, there was no significant difference between the clinical outcomes of both groups. Conclusion PTS does not affect the clinical outcomes of patients who underwent arthroscopic anterior cruciate ligament reconstruction in the early period.
Collapse
Affiliation(s)
- Ugur Kasman
- Department of Orthopedics and Traumatology, Bahçeşehir University School of Medicine, Istanbul, TUR
| | - Serkan Surucu
- Orthopedics and Rehabilitation, Yale University, New Haven, USA
| | - Ozgur Korkmaz
- Department of Orthopedics and Traumatology, Bahçeşehir University School of Medicine, Istanbul, TUR
| |
Collapse
|
3
|
McMellen CJ, Sinkler MA, Calcei JG, Hobson TE, Karns MR, Voos JE. Management of Bone Loss and Tunnel Widening in Revision ACL Reconstruction. J Bone Joint Surg Am 2023; 105:1458-1471. [PMID: 37506198 DOI: 10.2106/jbjs.22.01321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
➤ Both mechanical and biological factors can contribute to bone loss and tunnel widening following primary anterior cruciate ligament (ACL) reconstruction.➤ Revision ACL surgery success is dependent on graft position, fixation, and biological incorporation.➤ Both 1-stage and 2-stage revision ACL reconstructions can be successful in correctly indicated patients.➤ Potential future solutions may involve the incorporation of biological agents to enhance revision ACL surgery, including the use of bone marrow aspirate concentrate, platelet-rich plasma, and bone morphogenetic protein-2.
Collapse
Affiliation(s)
- Christopher J McMellen
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Margaret A Sinkler
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Jacob G Calcei
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
| | - Taylor E Hobson
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
| | - Michael R Karns
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
| | - James E Voos
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
| |
Collapse
|
4
|
Korthaus A, Krause M, Pagenstert G, Warncke M, Brembach F, Frosch KH, Kolb JP. Tibial slope in the posterolateral quadrant with and without ACL injury. Arch Orthop Trauma Surg 2022; 142:3917-3925. [PMID: 34964068 PMCID: PMC9596559 DOI: 10.1007/s00402-021-04298-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/30/2021] [Indexed: 01/13/2023]
Abstract
INTRODUCTION An increased tibial slope is a risk factor for rupture of the anterior cruciate ligament. In addition, a tibial bone bruise or posterior lateral impression associated with slope changes also poses chronic ligamentous instability of the knee joint associated with an anterior cruciate ligament (ACL) injury. In the majority of cases, the slope is measured in one plane X-ray in the lateral view. However, this does not sufficient represent the complex anatomy of the tibial plateau and especially for the posterolateral quadrant. Normal values from a "healthy" population are necessary to understand if stability of the knee joint is negatively affected by an increasing slope in the posterolateral area. Until now there are no data about the physiological slope in the posterolateral quadrant of the tibial plateau. MATERIALS AND METHODS In 116 MRI scans of patients without ligamentous lesions and 116 MRI scans with an ACL rupture, tibial slope was retrospectively determined using the method described by Hudek et al. Measurements were made in the postero-latero-lateral (PLL) and postero-latero-central (PLC) segments using the 10-segment classification. In both segments, the osseous as well as the cartilaginous slope was measured. Measurements were performed by two independent surgeons. RESULTS In the group without ligamentous injury the mean bony PLL slope was 5.8° ± 4.8° and the cartilaginous PLL slope was 6.7° ± 4.8°. In the PLC segment the mean bony slope was 6.6° ± 5.0° and the cartilaginous slope was 9.4° ± 5.7°. In the cohort with ACL rupture, the bony and cartilaginous slope in both PLL and PCL were significantly higher (P < 0.001) than in the group without ACL injury (bony PLL 9.8° ± 4.8°, cartilage PLL 10.4° ± 4.7°, bony PLC 10.3° ± 4.8°, cartilage PLL 12.8° ± 4.3°). Measurements were performed independently by two experienced surgeons. There were good inter- (CI 87-98.7%) and good intraobserver (CI 85.8-99.6%) reliability. CONCLUSION The bony and the cartilaginous slope in the posterolateral quadrant of the tibial plateau are different but not independent. Patients with an anterior cruciate ligament injury have a significantly steeper slope in the posterolateral quadrant compared to a healthy group. Our data indicate that this anatomic feature might be a risk factor for a primary ACL injury which has not been described yet. LEVEL OF EVIDENCE III.
Collapse
Affiliation(s)
- A Korthaus
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - M Krause
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - G Pagenstert
- CLARAHOF Clinic of Orthopaedic Surgery, University of Basel, Basel, Switzerland
| | - M Warncke
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - F Brembach
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - Karl-Heinz Frosch
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.
- Department of Trauma Surgery, Orthopaedics and Sports Traumatology, BG Hospital Hamburg, Hamburg, Germany.
| | - J P Kolb
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| |
Collapse
|
5
|
Taketomi S, Inui H, Yamagami R, Nakazato K, Kawaguchi K, Kono K, Sameshima S, Kage T, Tanaka S. Lateral posterior tibial slope does not affect femoral but does affect tibial tunnel widening following anatomic anterior cruciate ligament reconstruction using a Bone-Patellar Tendon-Bone graft. Asia Pac J Sports Med Arthrosc Rehabil Technol 2022; 30:25-31. [PMID: 36254269 PMCID: PMC9539629 DOI: 10.1016/j.asmart.2022.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 07/17/2022] [Accepted: 09/21/2022] [Indexed: 11/07/2022] Open
Abstract
Background Tunnel widening (TW) after anterior cruciate ligament (ACL) reconstruction has been a research area of interest in ACL reconstruction. In recent years, it has been noted that posterior tibial slope (PTS) affects several types of outcomes after ACL reconstruction including TW. However, the relationships between femoral and tibial TW and between PTS and TW following anatomical ACL reconstruction using a bone–patellar tendon–bone (BTB) graft are often not understood. Therefore, the purpose of this study was to retrospectively clarify the magnitude of femoral and tibial TW and the effect of PTS on TW following anatomical ACL reconstruction using a BTB graft. Methods A total of 111 patients who underwent isolated ACL reconstructions using BTB grafts were included in this study. Femoral and tibial tunnel aperture areas were measured using three-dimensional computed tomography (3D CT) at 1 week and 1 year postoperatively, and femoral and tibial TW (%) was calculated. Lateral and medial PTS was also measured using 3D CT. Results As compared with 1 week postoperatively, the mean tibial tunnel aperture areas increased by 30.6% ± 28.5%, and the mean femoral tunnel aperture areas increased by 28.3% ± 27.9% when measured at 1 year postoperatively. Although no significant difference was observed between femoral and tibial TW, a significant positive correlation was noted between femoral and tibial TW (r = 0.240, p = 0.011). A significant correlation was observed only between lateral PTS and tibial TW (r = 0.354, p < 0.001). There was no significant correlation between medial PTS and tibial TW, lateral PTS and femoral TW, or medial PTS and femoral TW. Conclusion Significant positive correlation was observed between femoral and tibial TW. Steeper lateral PTS correlated with greater tibial TW; on the other hand, medial PTS did not correlate with tibial TW. Although lateral PTS affected tibial TW, it did not affect femoral TW.
Collapse
Affiliation(s)
- Shuji Taketomi
- Corresponding author. 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Bongbong DN, Oeding JF, Ma CB, Pedoia V, Lansdown DA. Posterior Tibial Slope, Notch Width, Condylar Morphology, Trochlear Inclination, and Tibiofemoral Mismatch Predict Outcomes Following Anterior Cruciate Ligament Reconstruction. Arthroscopy 2022; 38:1689-1704.e1. [PMID: 34921954 DOI: 10.1016/j.arthro.2021.11.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 11/15/2021] [Accepted: 11/30/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE To provide a comprehensive summary of the available literature on the influence of bone morphology on outcomes after anterior cruciate ligament reconstruction (ACLR). METHODS Our protocol was prospectively registered with PROSPERO (International Prospective Register of Systematic Reviews) and followed PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-analyses) guidelines. The PubMed, Embase, and MEDLINE databases were searched for studies investigating knee morphologic features and outcomes after ACLR. Articles were screened and references lists were reviewed to identify relevant studies, after which methodologic quality was assessed for each study included in this review. Because of significant variability in terminology and methodology between studies, no meta-analyses were conducted. RESULTS Systematically screening a total of 19,647 studies identified from the search revealed 24 studies that met the inclusion and exclusion criteria. Among tibial shape features identified as predictors of poor outcomes after ACLR, increased posterior tibial slope was most common (16 studies). Other features such as increased tibial plateau area (1 study), decreased medial plateau width (1 study), and increased medial plateau height (1 study) were also associated with poor outcomes. For the femur, features related to notch width and condylar morphology were most common (4 studies and 7 studies, respectively). An increased condylar offset ratio, increased lateral femoral condylar ratio, and larger notch width were each found to be associated with negative ACLR outcomes, including increased cartilage degeneration, worse patient-reported outcomes, and graft failure. CONCLUSIONS Posterior tibial slope, notch width, condylar morphology, trochlear inclination, and tibiofemoral mismatch are associated with and predictive of outcomes after ACLR. LEVEL OF EVIDENCE Level IV, systematic review of Level II-IV studies.
Collapse
Affiliation(s)
- Dale N Bongbong
- School of Medicine, University of California, San Diego, San Diego, California, U.S.A
| | - Jacob F Oeding
- New York University Grossman School of Medicine, New York, New York, U.S.A
| | - C Benjamin Ma
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, U.S.A
| | - Valentina Pedoia
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, U.S.A
| | - Drew A Lansdown
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, U.S.A..
| |
Collapse
|
7
|
Tibial Sagittal Slope in Anterior Cruciate Ligament Injury and Treatment. J Am Acad Orthop Surg 2021; 29:e1045-e1056. [PMID: 34288895 DOI: 10.5435/jaaos-d-21-00143] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 06/18/2021] [Indexed: 02/01/2023] Open
Abstract
Although anterior cruciate ligament reconstruction (ACLR) is a generally successful procedure, failure is still relatively common. An increased posterior tibial slope (PTS) has been shown to increase the anterior position of the tibia relative to the femur at rest and under load in biomechanical studies. Increased PTS has also been shown to increase forces on the native and reconstructed ACL. Clinical studies have demonstrated elevated PTS in patients with failed ACLR and multiple failed ACLR, compared with control subjects. Anterior closing-wedge osteotomies have been shown to decrease PTS and may be indicated in patients who have failed ACLR with a PTS of ≥12°. Available clinical data suggest that the procedure is safe and effective, although evidence is limited to case series. This article presents the relevant biomechanics, clinical observational data on the effects of increased PTS, and an algorithm for evaluating and treating patients with a steep PTS.
Collapse
|
8
|
Lateral posterior tibial slope and length of the tendon within the tibial tunnel are independent factors to predict tibial tunnel widening following anatomic anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol Arthrosc 2021; 29:3818-3824. [PMID: 33459832 DOI: 10.1007/s00167-020-06419-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 12/14/2020] [Indexed: 10/22/2022]
Abstract
PURPOSE This study aimed to conduct a multivariate analysis to identify independent factors that predict tibial tunnel widening (TW) after anatomical anterior cruciate ligament (ACL) reconstruction using bone-patellar tendon-bone (BPTB) grafts. METHODS In total, 103 patients who underwent ACL reconstructions using BPTB grafts were included. Tunnel aperture area was measured using three-dimensional computed tomography 1 week and 1 year postoperatively, and the tibial TW was calculated. The patients were divided into group S comprising 58 patients who had tibial TW < 30% and group L comprising 45 patients who had tibial TW > 30%, retrospectively. Using univariate analyses, age, gender, body mass index, Tegner activity scale, the time between injury and surgery, tibial tunnel location, tibial tunnel angle, medial posterior tibial slope, lateral posterior tibial slope, and length of the tendon in the tibial tunnel were compared between two groups. Multivariate regression analysis was conducted to reveal the independent risk factors for the tibial TW among preoperative demographic factors and radiographic parameters that correlated with the tibial TW in the univariate analyses. RESULTS Compared with those at 1 week postoperatively, mean tibial tunnel aperture areas were increased by 30.3% ± 26.8% when measured at 1 year postoperatively. The lateral posterior tibial slope was significantly larger (p < 0.001), and the length of the tendon within the tibial tunnel was significantly longer in group L than that in group S (p = 0.03) in the univariate analyses. Multivariate regression analysis showed that the increase in lateral posterior tibial slope (p = 0.001) and the length of the tendon within the tibial tunnel (p = 0.03) were predictors of the tibial TW. CONCLUSIONS This study showed that increased lateral posterior tibial slope and a longer tendinous portion within the tibial tunnel were independent factors that predicted the tibial TW following anatomical ACL reconstruction with a BPTB graft. LEVEL OF EVIDENCE III.
Collapse
|
9
|
Zhang J, Ma J, Huang J, Wang G, Huang Y, Li Z, Yan J, Zeng X, Zhu H, Zhao W, Li Y, He B. Feasibility study of early prediction of postoperative MRI findings for knee stability after anterior cruciate ligament reconstruction. BMC Musculoskelet Disord 2021; 22:649. [PMID: 34330243 PMCID: PMC8325238 DOI: 10.1186/s12891-021-04507-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/05/2021] [Indexed: 11/10/2022] Open
Abstract
Background At present, the most effective and mature treatment after ACL injury and tear is ACL reconstruction, but the rehabilitation process after ACL reconstruction that is very long, so it is very important to find early MRI positive findings of knee instability. Methods We retrospectively collected the clinical and imaging data of 70 patients who underwent ACL reconstruction from January 2016 to December 2019; Based on clinical criteria, the patients were divided into a stable group (n = 57) and an unstable group (n = 13); We measured the MRI imaging evaluation indexes, including the position of the bone tunnel, graft status, and the anatomical factors; Statistical methods were used to compare the differences of imaging evaluation indexes between the two groups; The prediction equation was constructed and ROC curve was used to compare the prediction efficiency of independent prediction factors and prediction equation. Results There were significant differences in the abnormal position of tibial tunnel entrance, percentage of the position of tibial tunnel entrance, position of tibial tunnel exit, lateral tibial posterior slope (LTPS), width of intercondylar notch between stable knee joint group and unstable knee joint group after ACL reconstruction (P < 0.05); The position of tibial tunnel exits and the lateral tibial posterior slope (LTPS) and the sagittal obliquity of the graft were independent predictors among surgical factors and self-anatomical factors (P < 0.05); The prediction equation of postoperative knee stability was established: Logit(P) = -1.067–0.231*position of tibial tunnel exit + 0.509*lateral tibial posterior slope (LTPS)-2.105*sagittal obliquity of the graft; The prediction equation predicted that the AUC of knee instability was 0.915, the sensitivity was 84.6%, and the specificity was 91.2%. Conclusions We found that abnormalities of the position of the exit of the bone tunnel, lateral tibial posterior slope (LTPS) and sagittal obliquity of the graft were the early MRI positive findings of knee instability after ACL reconstruction. It is helpful for clinicians to predict the stability of knee joint after ACL reconstruction.
Collapse
Affiliation(s)
- Jianqiang Zhang
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Jiyao Ma
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Juan Huang
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Guoliang Wang
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Yilong Huang
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Zhenhui Li
- Medical Imaging Department, Yunnan Cancer Hospital &, The Third Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jun Yan
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Xiaomin Zeng
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Hongli Zhu
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Wei Zhao
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China
| | - Yanlin Li
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China.
| | - Bo He
- Medical Imaging Department, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, China.
| |
Collapse
|
10
|
Luo H, Xiang X, Li R, Li D, Wang W. [Influence of lateral posterior tibial slope on tibial tunnel expansion after anatomical single-bundle anterior cruciate ligament reconstruction]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2021; 35:697-703. [PMID: 34142495 DOI: 10.7507/1002-1892.202101090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objective To investigate the influence of lateral posterior tibial slope (LPTS) on tibial tunnel expansion after anatomical single-bundle anterior cruciate ligament (ACL) reconstruction and the effect of tibial tunnel expansion on knee joint function. Methods A clinical data of 52 patients with ACL rupture, who underwent arthroscopic anatomical single-bundle reconstruction between November 2018 and December 2019, was retrospectively analyzed. There were 32 males and 20 females with an average age of 34.3 years (range, 14-64 years). There were 22 cases of left knee and 30 cases of right knee. The time from injury to operation ranged from 7 to 30 days, with an average of 15.9 days. The knee function was evaluated by International Knee Documentation Committee (IKDC) score and Lysholm score before operation and at 3 and 6 months after operation. At 3 and 6 months after operation, the LPTS and the width of exit, middle segment, entrance, and 2 cm from the exit of the articular surface of the tibial tunnel were measured based on MRI. The expansion of tibial tunnel was calculated and graded (degrees 0-3). According to LPTS, the patients were divided into group A (<6.0°), group B (6°-12°), and group C (>12°), and the difference in the expansion of tibial tunnel between groups was compared. Results All the 52 patients were followed up 6-12 months (mean, 7.1 months). The IKDC and Lysholm scores at 3 and 6 months after operation were significantly different from those before operation ( P<0.05); and the difference of knee scores between 3 and 6 months after operation was significant ( P<0.05). The tibial tunnel expanded after operation, and the relative expansion at the exit and the middle segment showed significant difference between 3 months and 6 months after operation ( P<0.05). The expansion degree of tibial tunnel was rated as degree 0 in 5 cases, degree 1 in 28 cases, degree 2 in 16 cases, and degree 3 in 3 cases at 3 months after operation, and degree 0 in 5 cases, degree 1 in 20 cases, degree 2 in 25 cases, and degree 3 in 2 cases at 6 months after operation. There was no significant difference in IKDC and Lysholm scores between patients with different expansion degrees of tibial tunnels ( P>0.05). The LPTS of 52 patients ranged from -0.8° to 18.7° (mean, 10.6°); there were 7 cases in group A, 24 cases in group B, and 21 cases in group C. There was no significant difference in age, gender, preoperative IKDC and Lysholm scores, and initial width of tibial tunnel between groups ( P>0.05). There was no significant difference in the relative expansion of tibial tunnel at exit and middle segment between groups at 3 months after operation ( P>0.05), and there was significant difference at 6 months after operation ( P<0.05). Conclusion After anatomical single-bundle reconstruction of ACL, the tibial tunnel would expand to some extent in a short time. LPTS had a significant effect on tibial tunnel expansion, and the larger the angle was, the more obvious the expansion of the proximal tibial tunnel was. However, early knee function is not affected by tibial tunnel expansion.
Collapse
Affiliation(s)
- Hao Luo
- Dalian Medical University, Dalian Liaoning, 116027, P.R.China
| | - Xianxiang Xiang
- Department of Sports Medicine, Affiliated Zhongshan Hospital of Dalian University, Dalian Liaoning, 116001, P.R.China
| | - Ruixin Li
- Department of Sports Medicine, Affiliated Xinhuan Hospital of Dalian University, Dalian Liaoning, 116001, P.R.China
| | - Danmei Li
- Department of Knee Arthropathy, Luoyang Orthopedic-Traumatological Hospital of Henan Province (Henan Provincial Orthopedic Hospital), Luoyang Henan, 471000, P.R.China
| | - Weiming Wang
- Department of Sports Medicine, Affiliated Xinhuan Hospital of Dalian University, Dalian Liaoning, 116001, P.R.China
| |
Collapse
|
11
|
Celik H, Kim JH, Lee SH, Lee DH. Femoral Tunnel Widening Via Transcondylar Cross-Pin Fixation Versus Extracortical Suspensory Fixation After Single-Bundle ACLR: A Systematic Review and Meta-analysis. Orthop J Sports Med 2021; 9:2325967121993811. [PMID: 33869645 PMCID: PMC8020256 DOI: 10.1177/2325967121993811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/13/2020] [Indexed: 01/11/2023] Open
Abstract
Background: Compared with extracortical suspensory fixation, the close-to-joint
transcondylar cross-pin fixation method in anterior cruciate ligament
reconstruction (ACLR) is believed to entail less intratunnel graft motion
and subsequently lead to less tunnel widening. Purpose: To assess femoral tunnel widening via the transcondylar cross-pin method or
the suspensory femoral fixation method in patients who had undergone
ACLR. Study Design: Systematic review; Level of evidence, 4. Methods: This review focused on studies on femoral-tunnel widening after single-bundle
ACLR with cross-pin (Rigidfix or Transfix) and/or Endobutton closed loop
(CL). Two reviewers independently recorded data from each study, including
the sample size and magnitude of tunnel widening after ACLR. Results: Overall, 19 studies were included in this meta-analysis. There was no
significant difference between cross-pin and Endobutton CL fixations in the
pooled absolute change in tunnel widening from the immediate postoperative
period to the final follow-up; this was true at both the tunnel aperture
(2.48 mm [95% CI, 1.76-3.2 mm] vs 2.93 mm [95% CI, 1.73-4.13 mm],
respectively; P = .527) and the midpoint of the femoral
tunnel (2.43 mm [95% CI, 1.77-3.1 mm] vs 2.54 mm [95% CI, –0.33 to 5.42 mm],
respectively; P = .937). No significant difference was
found in the relative percentage of femoral-tunnel widening between the 2
fixation methods (cross-pin, 43.3% [95% CI, 25.8%-60.8%] vs Endobutton CL,
42.0% [95% CI, 34.1%-49.9%]; P = .965). Conclusion: No significant difference in femoral tunnel widening was found to be
associated with the use of either cross-pin or extracortical suspensory
fixation in patients who underwent single-bundle ACLR.
Collapse
Affiliation(s)
- Haluk Celik
- Department of Orthopaedic Surgery, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Jun-Ho Kim
- Center for Joint Diseases and Rheumatism, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea
| | - Sang-Hak Lee
- Center for Joint Diseases and Rheumatism, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea
| | - Dae-Hee Lee
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| |
Collapse
|
12
|
Imhoff FB, Mehl J, Comer BJ, Obopilwe E, Cote MP, Feucht MJ, Wylie JD, Imhoff AB, Arciero RA, Beitzel K. Slope-reducing tibial osteotomy decreases ACL-graft forces and anterior tibial translation under axial load. Knee Surg Sports Traumatol Arthrosc 2019; 27:3381-3389. [PMID: 30687890 DOI: 10.1007/s00167-019-05360-2] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 01/14/2019] [Indexed: 02/08/2023]
Abstract
PURPOSE Posterior tibial slope (PTS) represents an important risk factor for anterior cruciate ligament (ACL) graft failure, as seen in clinical studies. An anterior closing wedge osteotomy for slope reduction was performed to investigate the effect on ACL-graft forces and femoro-tibial kinematics in an ACL-deficient and ACL-reconstructed knee in a biomechanical setup. METHODS Ten cadaveric knees with a relatively high native slope (mean ± SD): (slope 10° ± 1.4°, age 48.2 years ± 5.8) were selected based on prior CT measurements. A 10° anterior closing-wedge osteotomy was fixed with an external fixator in the ACL-deficient and ACL-reconstructed knee (quadruple Semi-T/Gracilis-allograft). Each condition was randomly tested with both the native tibial slope and the post-osteotomy reduced slope. Axial loads (200 N, 400 N), anterior tibial draw (134 N), and combined loads were applied to the tibia while mounted on a free moving and rotating X-Y table. Throughout testing, 3D motion tracking captured anterior tibial translation (ATT) and internal tibial rotation (ITR). Change of forces on the reconstructed ACL-graft (via an attached load-cell) were recorded, as well. RESULTS ATT was significantly decreased after slope reduction in the ACL-deficient knee by 4.3 mm ± 3.6 (p < 0.001) at 200 N and 6.2 mm ± 4.3 (p < 0.001) at 400N of axial load. An increase of ITR of 2.3° ±2.8 (p < 0.001) at 200 N and by 4.0° ±4.1 (p < 0.001) at 400 N was observed after the osteotomy. In the ACL-reconstructed knee, ACL-graft forces decreased after slope reduction osteotomy by a mean of 14.7 N ± 9.8 (p < 0.001) at 200 N and 33.8 N ± 16.3 (p < 0.001) at 400N axial load, which equaled a relative decrease by a mean of 17.0% (SD ± 9.8%), and 33.1% (SD ± 18.1%), respectively. ATT and ITR were not significantly changed in the ACL-reconstructed knee. Testing of a tibial anterior drawing force in the ACL-deficient knee led to a significantly increased ATT by 2.7 mm ± 3.6 (p < 0.001) after the osteotomy. The ACL-reconstructed knee did not show a significant change (n.s.) in ATT after the osteotomy. However, ACL-graft forces detected a significant increase by 13.0 N ± 8.3 (p < 0.001) after the osteotomy with a tibial anterior drawer force, whereas the additional axial loading reduced this difference due to the osteotomy (5.3 N ± 12.6 (n.s.)). CONCLUSIONS Slope-reducing osteotomy decreased anterior tibial translation in the ACL-deficient and ACL-reconstructed knee under axial load, while internal rotation of the tibia increased in the ACL-deficient status after osteotomy. Especially in ACL revision surgery, the osteotomy protects the reconstructed ACL with significantly lower forces on the graft under axial load.
Collapse
Affiliation(s)
- Florian B Imhoff
- Department of Orthopaedic Sports Surgery, Technical University of Munich, Munich, Germany.,Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Julian Mehl
- Department of Orthopaedic Sports Surgery, Technical University of Munich, Munich, Germany.,Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Brendan J Comer
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Elifho Obopilwe
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Mark P Cote
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Matthias J Feucht
- Department of Orthopaedic Sports Surgery, Technical University of Munich, Munich, Germany
| | - James D Wylie
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA.,Department of Orthopedic Surgery, Boston Children's Hospital, Boston, MA, USA
| | - Andreas B Imhoff
- Department of Orthopaedic Sports Surgery, Technical University of Munich, Munich, Germany.
| | - Robert A Arciero
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Knut Beitzel
- Department of Orthopaedic Sports Surgery, Technical University of Munich, Munich, Germany.,Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| |
Collapse
|
13
|
Anterior cruciate ligament reconstruction is associated with greater tibial tunnel widening when using a bioabsorbable screw compared to an all-inside technique with suspensory fixation. Knee Surg Sports Traumatol Arthrosc 2019; 27:2577-2584. [PMID: 30406408 DOI: 10.1007/s00167-018-5275-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 10/29/2018] [Indexed: 12/19/2022]
Abstract
PURPOSE To compare clinical outcomes and tunnel widening following anterior cruciate ligament reconstruction (ACLR) performed with an all-inside technique (Group A) or with a bioabsorbable tibial screw and suspensory femoral fixation (Group B). METHODS Tunnel widening was assessed using computed tomography (CT) and a previously validated analytical best fit cylinder technique at approximately 1-year following ACLR. Clinical follow-up comprised evaluation with IKDC, KSS, Tegner, Lysholm scores, and knee laxity assessment. RESULTS The study population comprised 22 patients in each group with a median clinical follow-up of 24 months (range 21-27 months). The median duration between ACLR and CT was 13 months (range 12-14 months). There were no significant differences in clinical outcome measures between groups. There were no differences between groups with respect to femoral tunnel widening. However, there was a significantly larger increase in tibial tunnel widening, at the middle portion, in Group B (2.4 ± 1.5 mm) compared to Group A (0.8 ± 0.4 mm) (p = 0.027), and also at the articular portion in Group B (1.5 ± 0.8 mm) compared to Group A (0.8 ± 0.8 mm) (p = 0.027). CONCLUSION Tibial tunnel widening after ACLR using hamstring tendon autograft is significantly greater with suspensory femoral fixation and a bioabsorbable tibial interference screw when compared to an all-inside technique at a median follow-up of 2 years. The clinical relevance of this work lies in the rebuttal of concerns arising from biomechanical studies regarding the possibility of increased tunnel widening with an all-inside technique. LEVEL OF EVIDENCE III.
Collapse
|
14
|
Celik H, Lee DH. Comparison of the aperture and midportion femoral tunnel widening after anterior cruciate ligament reconstruction: A systematic review and meta-analyses. Medicine (Baltimore) 2019; 98:e16121. [PMID: 31261529 PMCID: PMC6616244 DOI: 10.1097/md.0000000000016121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND To identify whether the aperture or the midportion of the femoral tunnel had a larger tunnel widening in patients who undergo ACL reconstruction. METHODS PubMed, EMBASE and Cochrane Library were searched for relative studies that evaluated tunnel widening in patients underwent arthroscopic ACL reconstruction. Two reviewers independently recorded data from each study, including the sample size and magnitude of tunnel widening. Random-effects meta-analyses were performed to pool the outcomes of tunnel widening by estimating the standardized mean differences in tunnel widening and their 95% confidence intervals (CIs), Publication bias was assessed using funnel plots and Egger test when the number of included studies was >10. RESULTS Eleven included studies compared tunnel widening between the aperture and the midportion. In these studies, 372 and 92 patients underwent single- and double-bundle ACL reconstructions, respectively. Subgroup analyses in terms of evaluation imaging tool for tunnel widening showed no significant differences in tunnel widening between the aperture and the midportion of the femoral tunnel regardless of plain radiograph (mean difference, 0.02 mm; P = .97), computed tomography (mean difference 0.08 mm; P = .55), and magnetic resonance imaging (mean difference, 0.13 mm; P = .78). Likewise, no significant difference in femoral tunnel widening was found between the aperture and the midportion, irrespective of transtibial (mean difference, 0.18 mm; P = .57), anteromedial (mean difference, 0.02 mm; P = .90), and outside-in techniques (mean difference, 0.01 mm; P = .98). CONCLUSION No significant difference in femoral tunnel widening was found between the aperture and the midportion in the patients who underwent ACL reconstruction.
Collapse
Affiliation(s)
- Haluk Celik
- Department of Orthopaedic Surgery, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Dae-Hee Lee
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| |
Collapse
|
15
|
Ra HJ, Celik H, Kim HJ, Lee DH. Femoral tunnel widening is similar between anteromedial portal and transtibial techniques following single-bundle anterior cruciate ligament reconstruction: a systematic review and meta-analysis. Knee Surg Sports Traumatol Arthrosc 2019; 27:626-635. [PMID: 30306239 DOI: 10.1007/s00167-018-5204-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 10/04/2018] [Indexed: 12/22/2022]
Abstract
PURPOSE In anterior cruciate ligament (ACL) reconstruction, there is concern regarding the potential risk of femoral tunnel widening in the anteromedial portal (AMP) technique due to the acute graft-bending angle at the aperture and the more elliptical aperture shape of the femoral tunnel compared to the transtibial (TT) techniques. Therefore, the aim of the current systematic review and meta-analysis was to compare the femoral tunnel widening between the AMP and TT techniques in patients who underwent ACL reconstruction. METHODS It should be included the studies that reported on femoral tunnel widening in patients who underwent single-bundle ACL reconstruction, using soft-tissue tendon graft, with AMP and/or TT techniques. Two reviewers independently recorded data from each study, including the sample size and magnitude of tunnel widening after ACL reconstruction. RESULTS Twenty-one studies were finally included in this meta-analysis. The pooled changes of absolute millimeters of tunnel widening from the immediate postoperative status to the last follow-up did not differ significantly between the AMP and TT techniques at both the aperture [3.31 mm, 95% confidence interval (CI) 1.7-5.0. mm versus 2.9 mm, 95% CI 2.4-3.4 mm, P = n.s.] and the midportion (3.5 mm, 95% CI 0.8-6.3 mm versus 3.0 mm, 95% CI 2.2-3.9 mm, P = n.s.) of the femoral tunnel. No significant difference was observed between the two techniques in the relative percentage of femoral tunnel widening (AMP; 28.8%, 95% CI 14.8-42.9% vs. TT; 29.7%, 95% CI 15.6-43.7%, P = n.s.). CONCLUSION No significant difference in femoral tunnel widening was observed between the AMP and TT techniques, both in absolute millimeter and relative percentage, in patients who underwent single-bundle ACL reconstruction. This finding could alleviate the potential concerns associated with femoral tunnels being wider for the AMP than for the TT technique. LEVEL OF EVIDENCE III.
Collapse
Affiliation(s)
- Ho Jong Ra
- Department of Orthopaedic Surgery, College of Medicine, Gangneung Asan Hospital, Ulsan University, Gangneung, Republic of Korea
| | - Haluk Celik
- Department of Orthopaedic Surgery, Umraniye Training and Research Hospital, Istanbul, Turkey
| | - Hyun-Jun Kim
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Ilwon-ro, Gangnam-gu, 06351, Seoul, South Korea
| | - Dae-Hee Lee
- Department of Orthopaedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Ilwon-ro, Gangnam-gu, 06351, Seoul, South Korea.
| |
Collapse
|
16
|
Nagai K, Tashiro Y, Herbst E, Gale T, Wang JH, Irrgang JJ, Anderst W, Fu FH. Steeper posterior tibial slope correlates with greater tibial tunnel widening after anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol Arthrosc 2018; 26:3717-3723. [PMID: 29869200 DOI: 10.1007/s00167-018-5004-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 05/30/2018] [Indexed: 01/13/2023]
Abstract
PURPOSE To investigate the correlation between posterior tibial slope (PTS) and tibial tunnel widening after anterior cruciate ligament reconstruction (ACL-R). METHODS Twenty-five patients underwent anatomic single-bundle ACL-R using quadriceps tendon autograft. Six months after surgery, each patient underwent high-resolution computed tomography (CT). Tibial tunnel aperture location was evaluated using a grid method. Medial and lateral PTS (°) was measured based on a previously described method. To evaluate tibial tunnel widening, cross-sectional area (CSA) of the tibial tunnel beneath the aperture was measured using CT axial slice. Nominal elliptical area was calculated using the diameter of a dilator during the surgery and the angle between the axial slice and the tunnel axis. Percentage of tunnel widening (%) was determined by dividing the CSA by the nominal area. Pearson correlation coefficient was used to explore the association between medial/lateral PTS and tibial tunnel widening (P < 0.05). RESULTS Location of tibial tunnel aperture was 29.8 ± 6.3% in anterior-posterior direction, and 45.7 ± 2.1% in medial-lateral direction. Medial and lateral PTS were 3.7° ± 2.5° and 4.9° ± 2.4° respectively. Tibial tunnel widening was 97.2 ± 20.3%. Tibial tunnel widening was correlated with medial PTS (r = 0.558, P = 0.004) and lateral PTS (r = 0.431, P = 0.031). CONCLUSION Steeper medial and lateral PTS correlated with greater tibial tunnel widening. The clinical relevance is that surgeons should be aware that PTS may affect tibial tunnel widening after ACL-R. Thus, subjects with steeper PTS may need to be more carefully followed to see if there is greater tibial tunnel widening, which might be important especially in revision ACL-R. LEVEL OF EVIDENCE III.
Collapse
Affiliation(s)
- Kanto Nagai
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yasutaka Tashiro
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Elmar Herbst
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.,Department of Orthopaedic Sports Medicine, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Tom Gale
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Joon Ho Wang
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - James J Irrgang
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - William Anderst
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Freddie H Fu
- Department of Orthopaedic Surgery, University of Pittsburgh, Kaufmann Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.
| |
Collapse
|