Posterior Cruciate Ligament Rupture Research Articles

Treatment of Injuries to the Posterior Cruciate Ligament

Compared to the anterior cruciate ligament injury, the rupture of the posterior cruciate Ligament (PCL) is the rarer condition. A high healing potential is attributed to the PCL in the literature, which is why conservative therapy is also considered important in addition to surgical treatment 1. Posterior cruciate ligament rupture is often associated with concomitant injuries. Among other things, up to 70% of cases are associated with accompanying injuries to the posterolateral corner 2. The detection of concomitant injuries has a significant influence on the outcome, as isolated surgical PCL stabilization does not lead to satisfactory results in these cases.

Unicompartmental knee arthroplasty combined with posterior cruciate ligament reconstruction: a case report

BackgroundIn this study, we present the unique case of a patient with knee osteoarthritis (OA) of the medial compartment and posterior cruciate ligament (PCL) deficiency who underwent simultaneous medial unicompartmental knee arthroplasty (UKA) and PCL reconstruction.Case presentationA 49-year-old male patient presented with a 1-year history of pain and instability in the left knee. The patient had previously experienced a trauma-related injury to the PCL of the left knee that was left untreated. Imaging and physical examination confirmed the presence of left medial knee OA along with PCL rupture. To address these issues, the patient underwent UKA combined with PCL reconstruction. The patient’s Lysholm score was 47 before surgery and 81 three months after surgery, the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score was 29 before surgery and 18 three months after surgery, and the International Knee Documentation Committee (IKDC) subjective score was 56.3 before surgery and 74.7 three months after surgery. Six months after surgery, the patient's gait returned to normal, and he was able to jog.ConclusionThis case report presents the first instance of UKA combined with PCL reconstruction and introduces a novel treatment approach for patients suffering from medial knee OA and ligament injury.

Arthroscopic Confirmation of Femoral Button Deployment During Posterior Cruciate Ligament Reconstruction

Posterior cruciate ligament (PCL) ruptures are uncommonly seen in knee ligament injuries. Cconservative treatment is often suitable for isolated tears with mild-to-moderate posterior knee laxity (grades I or II). However, surgical intervention is indicated for symptomatic grade III or multiligament knee injuries. PCL reconstruction has experienced continuous development due to the progress made in arthroscopic techniques and instruments. Abnormal positioning and tensioning of the femoral button result in multiple complications such as residual laxity, loss of quadriceps muscle strength, and joint stiffness. In this Technical Note, we describe direct arthroscopic visualization of the femoral button deployment in PCL reconstruction technique, and we discuss its importance to prevent complications related to button malposition.

Risk factors of failure results after double-bundle reconstruction with autogenous hamstring grafts for isolated posterior cruciate ligament rupture cases

Posterior tibial translation (PTT) after double-bundle posterior cruciate ligament (PCL) reconstruction has sometimes occurred. Purpose of this study is to identify the risk factors for postoperative PTT after double-bundle PCL reconstruction with a hamstring autograft. Comparing the results of bilateral gravity sag view (GSV) at 12 months after surgery, over 5-mm PTT was defined as ‘failure’ in this study. Of 26 isolated PCL reconstruction cases, over 5-mm PTT was seen in 7 cases (group F: 9.57 ± 1.28 mm), and 19 cases had less than 5 mm (group G: 2.84 ± 1.29 mm). Age, sex, body mass index (BMI), preoperative GSV, posterior slope angle of the tibia, anterolateral bundle (ALB) and posteromedial bundle (PMB) graft diameters, and tibial tunnel diameter were evaluated. The two groups were compared with the 2 × 2 chi-squared test, the Mann Whitney U-test, and Spearman’s rank correlation coefficient. Multivariate logistic regression analysis was also performed to determine the risk factor. Statistical significance was indicated as p < 0.01 for correlation with postoperative PTT, and as p < 0.05 for all other comparisons. Mean age (group G 31.8 ± 12.5 vs group F 34.9 ± 15.9 years), sex (male/female: 15/4 vs 3/4), BMI (25.6 ± 4.6 vs 24.9 ± 3.9 kg/m2), preoperative GSV (11.3 ± 2.2 vs 11.6 ± 2.9 mm), PMB diameter (5.37 ± 0.33 vs 5.36 ± 0.48 mm), and tibial tunnel diameter (9.32 ± 0.58 vs 9.29 ± 0.49 mm) showed no significant differences. ALB diameter was significantly greater in group G (7.0 ± 0.5 mm) than in group F (6.5 ± 0.29 mm; p = 0.022). There was also a significant difference in posterior tibial slope angle (group G 9.19 ± 1.94 vs group F 6.54 ± 1.45, p = 0.004). On Spearman rank correlation coefficient analysis, ALB diameter GSV (correlation coefficient: − 0.561, p = 0.003) and posterior tibial slope angle (correlation coefficient: − 0.533, p = 0.005) showed a significant correlation with postoperative PTT. Multivariate logistic regression analysis showed that ALB diameter (OR 19.028; 95% CI 1.082–334.6; p = 0.044) and posterior slope angle of tibia (OR 3.081; 95% CI 1.109–8.556; p = 0.031) were independently associated with postoperative PTT, respectively. In double-bundle PCL reconstruction with hamstring, smaller ALB graft diameter and lower (flatted) tibial slope angle were considered risk factors for postoperative PTT.

Posterior cruciate ligament rupture : state of the art

Posterior cruciate ligament (PCL) ruptures can cause severe knee instability and disability and thus, appropriate management is crucial for the successful restoration of patients' knee function. Rupture of the PCL can occur during sporting activity but more often, as a part of high-energy trauma. The diagnosis can be made using various clinical tests, such as the posterior drawer test or the quadriceps active test. MRI is the gold standard in imaging. PCL injuries can be classified from grade I to grade III, with increasing severity. Treatment can be conservative or surgical and should be personalized based on patients' demographic characteristics, grade of injury, level of instability, associated injuries and activity levels.

All-Inside Posterior Cruciate Ligament Reconstruction Using Autologous Quadriceps Tendon–Bone Block

Posterior cruciate ligament ruptures account for nearly 20% of knee ligament lesions. These may be either isolated or occur as part of multiligament injuries. In most of the cases, conservative treatment is recommended, but when operative treatment is required, this is technically demanding. Several posterior cruciate ligament reconstructive techniques have been described, but some concerns still remain regarding graft choice, tunnels position, visualization of the posterior compartment and graft fixation. We describe an arthroscopic all-inside technique using a single-bundle autologous quadriceps tendon with patellar bone block.

Characterization and Prevalence of Pediatric Ramp Lesions Associated with Anterior Cruciate Ligament Tears.

Background: Ramp lesions correspond to posterior meniscocapsular tears of the medial meniscus and are common with anterior cruciate ligament (ACL) tears. They cannot be recognized easily on preoperative magnetic resonance imaging (MRI) scans and are difficult to visualize even using standard arthroscopic approaches. We aim to (1) characterize and evaluate the prevalence of ramp lesions in pediatric patients at a major tertiary children's hospital, providing important insights into demographics, diagnosis, treatment, and functional disability and (2) evaluate the efficacy of MRI in its diagnosis.&#x0D; Materials and Methods: We retrospectively reviewed patients under 21 years old undergoing posterior medial meniscal injuries and anterior cruciate ligament ruptures with arthroscopic examination and positive ramp lesions from 2018 to 2021. Patient demographics (including gender and age), initial presentation, physical examination findings, mechanism of injury, pre-operative radiologic findings, and treatment were collected and reviewed via electronic medical record. Exclusion criteria included patients over 18 years old, patients, that did not have an MRI, and patients that were not treated surgically.&#x0D; Results: There were 117 patients that met the inclusion criteria out of 690 patients. The mean age at diagnosis was 15.6±1.6 years and the mean BMI was 26.7±6.4. 83% of injuries occurred secondary to sporting activities. Ramp lesions were only detected on preoperative MRI in 63% of cases, suspected in 3%, and not detected in 33%. The sensitivity of the MRI was 63%.&#x0D; Conclusions: Ramp lesions were found in 117/690 (16.9%) of patients undergoing ACL reconstruction. MRI had a low sensitivity rate of 63%. During ACL reconstruction, a careful review of the posteromedial compartment is important to recognize less obvious trauma. Lack of treatment may lead to continued instability and risk of complications in these patients.

Posterior cruciate ligament rupture and all-epiphyseal repair with suture tape augmentation in a 5-year-old girl: a case report and review of the literature

IntroductionOnly a few case reports regarding pediatric posterior cruciate ligament (PCL) ruptures without bone avulsion exist in the literature. The present study aims to share our experience in the diagnosis, treatment, and prognosis of a child with a proximal PCL tear.Materials and methodsThis article reports a 5-year-old female diagnosed with a proximal PCL tear. The ruptured PCL was repaired with an all-epiphyseal suture tape augmentation (STA) without evidence of growth plate violation.ResultsThe suture tape was removed under arthroscopy and revealed the PCL was re-attached at 12 months after the first surgery. And at the time of this report, 36 months after surgery, she was doing well without any problems and with negative posterior drawer test.ConclusionsPediatric PCL tear without bone avulsion is rare. However, the torn PCL was noticed healed based on an arthroscopic second-look.

Onlay Technique for Posterior Cruciate Ligament Reconstruction: The Paccola's Technique

The primary function of the posterior cruciate ligament (PCL) is to restrict the posterior translation of the tibia, and its secondary function is to limit the tibial external rotation, mainly at 90° and 120° of knee flexion. The prevalence of PCL rupture ranges between 3% and 37% of patients with knee ligament tears. This ligament injury often is associated with other ligament injuries. Surgical treatment is recommended for acute PCL injuries associated with knee dislocations or when stress radiographs show a tibial posteriorization greater than or equal to 12 mm. The techniques classically described for the surgical treatment are inlay and transtibial, which can be performed in a single- or double-bundle fashion. Biomechanical studies suggest that the double-bundle technique is superior to the single femoral bundle, suggesting less postoperative laxity. However, such superiority has not yet been proven in clinical studies. This paper will describe the step-by-step technique for PCL surgical reconstruction. The tibial fixation of the PCL graft is performed by using a screw and spiked-washer, and the femoral fixation can be done with a single- or double-bundle technique. We will explain the surgical steps in detail, with tips to perform them simply and safely.

OUTCOME OF SIMULTANEOUS ARTHROSCOPIC ANTERIOR AND POSTERIOR CRUCIATE LIGAMENT RECONSTRUCTION USING AUTOGENOUS GRAFTS WITH ALL-INSIDE TECHNIQUE

Introduction: Bicruciate knee ligament injury is a lesion affecting both the posterior cruciate ligament (PCL) and the anterior cruciate ligament (ACL) simultaneously, which is one of the most severe knee joint injuries. Operative simultaneous reconstruction is the standard of treatment. Objectives: To evaluate clinical results of one-stage ACL and PCL reconstruction using autogenous tendon grafts with an all-inside technique. Material and methods: The medical records of patients operated on by a group of surgeons at the Orthopedic Center, Military Hospital 103 from March 2015 to March 2020 were retrospectively analyzed. Thirty-four patients (24 males, 10 females) with combined rupture of both ACL and PCL underwent one-stage ACL and PCL reconstruction using autogenous hamstring and peroneus longus tendon grafts with all-inside technique. Results: The mean time of follow-up was 32.09 ± 25.15 months (9 - 68 months). The mean age was 37.7 ± 9.0 years (range 23 - 56 years). At the final follow-ups, all patients were without limit extension, 5/34 patients (14.71%) with limit flexion. The Lachman test was negative in 32 patients (94.12%), the pivot shift testing in 32 patients (94.12%) was negative, 26 patients (76.47%) had a positive posterior drawer test. The Lysholm knee score preoperative and final follow-up were 46.76 ± 17.08 (range 12 - 82) and 89.29 ± 8.57 (range 50 - 99) (p &lt; 0.01), respectively. Conclusion: This study demonstrates the effectiveness and safety of simultaneous arthroscopically assisted reconstruction of both ACL and PCL using autogenous hamstring and peroneus longus tendon for restoring knee stability with an all-inside technique.

Posterior Cruciate Ligament Reconstruction Using Flat Soft-Tissue Grafts

Isolated posterior cruciate ligament (PCL) ruptures are relatively rare, but they more commonly occur in multiligament knee injuries. To date, in isolated or combined injuries with grade III step-off, surgical treatment is recommended to restore joint stability and improve knee function. Several techniques for PCL reconstruction have been described. However, recent evidence has suggested that broad, flat soft-tissue grafts may more closely mimic the native PCL ribbonlike morphology in PCL reconstruction. Furthermore, a femoral rectangular bone tunnel may more accurately re-create the native PCL attachment, allowing grafts to simulate native PCL rotation during knee flexion and potentially improving biomechanics. Therefore, we have developed a PCL reconstruction technique using flat quadriceps or hamstring grafts. This technique can be performed using 2 types of surgical instruments that allow for the creation of a rectangular femoral bone tunnel.

Combined PCL and PLC Reconstruction Improves Residual Laxity in PCL Injury Patients with Posterolateral Knee Laxity Less Than Grade III.

To compare the short-term clinical and radiologic outcomes of combined posterior cruciate ligament (PCL) and posterolateral complex (PLC) reconstruction to those of isolated PCL reconstruction (PCLR) for patients with posterolateral knee laxity less than grade III. We retrospectively reviewed 49 patients (51 knees) who underwent PCLR between January 2008 and December 2015. Patients with a minimum follow-up of 24 months were included and divided into two groups (group A, isolated PCLR; group B, combined PCL and PLC reconstruction). Clinical outcomes were evaluated as the International Knee Documentation Committee (IKDC) subjective, Lysholm, and Tegner activity scale scores. Radiologic outcomes were also assessed using the side-to-side differences in posterior tibial translation via stress radiographs. A total of 30 cases were analyzed. There were no significant differences in the Lysholm and Tegner activity scale scores between the two groups preoperatively and at the final follow-up. However, group B showed a higher IKDC subjective score compared to group A at the final follow-up (group A, 72.8±8.9; group B, 77.7±10.1; p<0.05). Regarding the radiologic outcomes, group B also showed a significantly less side-to-side difference in posterior tibial translation compared to group A at the final follow-up (group A, 4.8±2.3 mm; group B, 3.8±2.1 mm; p<0.05). Combined PCL and PLC reconstruction resulted in improved clinical and radiologic outcomes than isolated PCLR in patients who have less than grade III posterolateral laxity of the knee. In cases of PCL rupture with ambiguous PLC injury, combined PCL and PLC reconstruction may help to improve posterior residual laxity of the knee.

PCL Reconstruction Surgery in Third Grade PCL Rupture: A Case Series

Objective: The PCL is the largest and strongest intraarticular ligament of the knee joint, comprising of 2 functional bundles: the larger anterolateral bundle (ALB) and the smaller posteromedial bundle (PMB). Posterior cruciate ligament (PCL) tears comprise 3% of outpatient knee injuries. The treatment of complete, isolated PCL tears remains controversial. Some studies have reported good outcomes after conservative treatment of partial PCL tears, while others have reported poor results at long-term follow-up with disabling symptoms and functional limitations. This case series reported the first experience of PCL reconstruction in our institution and its associated outcome. Methods: This prospective case series was conducted from January to December 2021. Two patients were included in this case series. All the patients were diagnosed with PCL tear by an Orthopaedic surgeon. clinical examination, knee radiograph, and MRI were obtained in both patients. All patients underwent arthroscopic PCL reconstruction by a single senior Orthopaedic surgeon. Physical therapy was performed after the surgery. Clinical evaluation was followed up for 9 months. The outcome in this case series was the posterior drawer test and range of motion. Result: Two patients were included in this case series. A favorable outcomes were noted following PCL reconstruction surgery. There were negative posterior drawer test, posterior sag sign, and full range of motion in both patients. Conclusion: A PCL reconstruction surgery provided a satisfactory clinical outcome in terms of posterior drawer test, posterior sag sign, and range of motion. PCL reconstruction surgery is recommended in patients who present with grade 3 PCL injury.

Isolated Injuries of the Posterior Cruciate Ligament, Surgical Treatment and its Relationship with Return to Sports

Isolated rupture of the posterior cruciate ligament has a low incidence worldwide, a large number of series report it as one of the most under-diagnosed orthopedic pathologies in emergency services and outpatient clinics. The initial treatment is generally conservative, however there are patients who develop a chronic condition known as posterior knee instability. The ideal method of posterior cruciate ligament reconstruction should be reproducible and clinically successful. A modification to the anatomical technique of the Posterior Cruciate Ligament plasty has been developed, which consists of reinforcement with an adjustable synthetic implant that is anchored on the bone surfaces and fulfills the function of stabilization and reinforcement of the damaged native ligament, in this way faster clinical and functional recovery is achieved. The present work seeks to demonstrate the superiority of the GraftlinkⓇ All inside posterior cruciate ligament repair technique by means of reinforcement and augmentation with the internal braceⓇ system compared to conventional treatment. Data were collected by the surgeon (Felpe Jarquín Gil) and the concomitant (Ignacio Palafox Carral). Inclusion criteria: isolated injuries of the Posterior Cruciate Ligament. Seven patients (43.75%) underwent surgery with the Internal BraceⓇ technique, 9 patients (56.25%) without internal braceⓇ. Follow-up was carried out for 1 year. Patients in the group who underwent posterior cruciate ligament plasty with internal braceⓇ had a faster recovery compared to conventional treatment (p = 0.001). A higher incidence of moderate to severe symptomatology is observed in patients in the group treated with conventional repair, while patients treated with modified repair by reinforcement with internal braceⓇ presented predominantly mild symptoms or no symptoms, this clearly shows a difference in terms of residual symptomatology. Internal braceⓇ repair represents a viable, reproducible, reliable technique, with superior and proven efficacy for the treatment of posterior cruciate ligament rupture, and undoubtedly represents an excellent treatment option to optimize the clinical and functional results of patients. athletes.

Clinical Accuracy of the Lateral-Anterior Drawer Test for Diagnosing Posterior Cruciate Ligament Rupture

BackgroundCommonly used clinical posterior cruciate ligament (PCL) tests present with diagnostic weaknesses requiring alternative clinical tests. The Lateral-Anterior Drawer test (LAD-test) is a suggested alternative that previously demonstrated concurrent validity in situ. Further in vivo LAD-test clinical accuracy examination is required prior to any recommendation for clinical adoption. Thus, this case–control study aims to (1) investigate the LAD-test’s in vivo interrater and intra-rater reliability; (2) establish LAD-test concurrent validity against MRI as the reference standard; and (3) examine the correspondence between examiners’ professional working experience and LAD-test diagnostic accuracy.MethodsThree examiners with different professional experience levels, blindfolded during testing, and blinded from subjects’ identity, medical history, and reference test outcome performed all LAD-testing twice per subject. Reliability analyses included percent agreement, Fleiss’ kappa and Cohen’s kappa coefficients with 95% Confidence Intervals (CIs) and prevalence-adjusted bias-adjusted kappa (PABAK) calculations. Validation parameters included sensitivity, specificity, likelihood ratios (LR + ; LR-), and predictive values (PPV; NPV) each accompanied by 95%CIs; each tester’s percent agreement with the MRI; and their Youden Index.ResultsThe study sample was comprised of 31 subjects of which 14 had a history of unilateral full-thickness PCL-rupture. Their 14 contralateral knees and both knees of 17 healthy subjects served as controls. In vivo LAD-test performance did not produce any negative ramifications for the tested subjects. Interrater reliability was moderate (test-1: Fleiss’κ = 0.41; 95% CI 0.40;0.41; test-2:Fleiss’κ = 0.51; 95% CI 0.50;0.51). Pairwise examiner’s LAD-test outcome agreement ranged from 74 to 89%. Pairwise interrater reliability was fair-to-substantial (κ = 0.27 to κ = 0.65) with moderate-to-substantial PABAK (0.48–0.77). Intra-rater reliability was substantial-to-almost perfect (PABAK 0.65–0.97). Sensitivity and specificity ranged from 57 to 86% and 83 to 98%, respectively. The advanced and novice clinicians’ Youden Indexes were acceptable. The same examiners’ positive likelihood ratios revealed important and relative important effects, respectively. Positive predictive values were considerable for the advanced and novice clinicians, while negative predictive values were high for all examiners.ConclusionOverall, the study results suggested LAD-test practicability. In vivo LAD-test performance did not produce any negative ramifications for the tested subjects. In subjects presenting with a chronic PCL-deficiency (i.e., > 3 months since initial injury), the LAD-test’s clinical accuracy was comparable-to-superior to other commonly used clinical PCL-tests. Future studies to establish the LAD-test’s usefulness in isolation as well as in combination with other clinical tests for acute PCL-rupture diagnostics are warranted.Trial registration numberDRKS00013268 (09. November 2017).

Smaller intercondylar notch size and smaller ACL volume increase posterior cruciate ligament rupture risk

PurposeLittle is known about risk factors for sustaining a posterior cruciate ligament (PCL) rupture. Identifying risk factors is the first step in preventing a PCL rupture from occurring. The morphology of the knee in patients who ruptured their PCL may differ from that of control patients. The hypothesis was that the intercondylar notch dimensions, 3-D volumes of the intercondylar notch and, the 3-D volumes of both the ACL and the PCL were correlated to the presence of a PCL rupture.MethodsThe magnetic resonance imaging (MRI) scans of 30 patients with a proven PCL rupture were compared to 30 matched control patients with proven intact ACL and PCL. Control patients were selected from patients with knee trauma during sports but without cruciate ligament injury. Patients have been matched for age, height, weight, BMI, and sex. The volumes of the intercondylar notch and both the ACL and PCL were measured on 3D reconstructions. Second, the bicondylar width, the notch width, and the notch width index were measured of all subjects. The relationship between our measurements and the presence of a PCL rupture was analysed.ResultsThe results show a significant difference in the volumes of the intercondylar notch and the ACL between patients with a ruptured PCL and control patients. Patients with a PCL rupture have smaller intercondylar notch volumes and smaller ACL volumes. There were no significant differences in the bicondylar width, notch width, and notch width index. In the control patients, a significant correlation between the volume of the PCL and the volume of the ACL was found (0.673, p < 0.001).ConclusionPatients with a PCL rupture have smaller intercondylar volumes and smaller ACL volumes when compared to control patients. Second, patients with smaller ACL volumes have smaller PCL volumes. This study shows, for the first time, that there are significant size and volume differences in the shape of the knee between patients with a PCL rupture and control patients.Level of evidenceIV.

Allogeneic umbilical cord mesenchymal stem cell conditioned medium (secretome) for treating posterior cruciate ligament rupture: a prospective single-arm study.

Outcomes of the current management of posterior cruciate ligament (PCL) rupture are still unsatisfactory. Recent literature demonstrated the efficacy of the paracrine action of mesenchymal stem cells (MSC) in ligament rupture healing. This study aimed to evaluate the outcome of arthroscopic administration of allogeneic umbilical cord-derived MSC (UC-MSC) conditioned medium (secretome) for the treatment of PCL rupture. This is a prospective study including 12 individuals with PCL rupture grade 1 or 2 who were performed arthroscopy and secretome administrations. The functional and radiologic outcome of the knee was examined one year following intervention. Preoperatively, posterior drawer test revealed three cases of grade 2+ and nine cases of grade 1+, whereas the final follow-up revealed two cases of grade 2+ and ten cases of grade 1+ PCL rupture. At final follow-up, the mean scores for the IKDC, modified Cincinnati, and Lysholm were 90.58 ± 4.30, 90.90 ± 2.15, and 89.42 ± 3.16, respectively. The means of the serial hop tests were 90.33, 94.16, 93.66, and 95.33 for single, triple, crossover, and time hop tests, respectively. Five patients were able to resume competitive sport after an average of 25.8weeks (25-38). The final MRI analysis revealed that six knees (50%) regained PCL continuity with low signal intensity, five knees (41.6%) returned near-normal PCL continuity, and one knee (8.3%) regained PCL continuity but with deformed outlines. Short-term follow-up indicated that the secretome generated from allogenic UC-MSC produces excellent functional and radiographic results in grade I-II PCL rupture.

Clinical results after arthroscopic reconstruction of the posterolateral corner of the knee: A prospective randomized trial comparing two different surgical techniques

IntroductionArthroscopic reconstruction techniques of the posterolateral corner (PLC) of the knee have been developed in recent years. Reconstruction techniques for higher-grade PLC injuries have not yet been validated in clinical studies. This study aimed to compare clinical outcomes of two different techniques and to present results of the first prospective randomized clinical trial of patients to undergo these novel procedures.Materials and methods19 patients with Fanelli Type B posterolateral corner injuries and additional posterior cruciate ligament ruptures were included in this prospective study. They were randomly assigned to one of two novel arthroscopic reconstruction techniques, based on open surgeries developed by Arciero (group A) and LaPrade (group B). Follow-up was conducted at 6 and 12 months postoperatively and included clinical examinations for lateral, rotational and posterior stability, range of motion and subjective clinical outcome scores (IKDC Subjective Score, Lysholm Score, Tegner Activity Scale and Numeric Rating Scale for pain).ResultsAt 6 and 12 months postoperative, all patients in both groups presented stable to varus, external rotational and posterior forces, there were no significant differences between the two groups. At 12-month follow-up, group A patients showed significantly higher maximum flexion angles (134.17° ± 3.76° vs. 126.60° ± 4.22°; p = 0.021) compared to patients of group B. Duration of surgery was significantly longer in Group B patients than in group A (121.88 ± 11.63 vs. 165.00 ± 35.65 min; p = 0.003). Posterior drawer (side-to-side difference) remained more reduced in group A (2.50 ± 0.69 mm vs. 3.27 ± 0.92 mm; p = 0.184). Subjective patient outcome scores showed no significant differences between groups (Lysholm Score 83.33 ± 7.79 vs. 86.40 ± 9.21; p = 0.621).ConclusionsThis study indicates sufficient restoration of posterolateral rotational instability, varus instability and posterior drawer after arthroscopic posterolateral corner reconstruction without neurovascular complications.Increased postoperative range of motion and a shorter and less invasive surgical procedure could favor the arthroscopic reconstruction technique according to Arciero over LaPrade’s technique in future treatment considerations.

Patients with isolated posterior cruciate ligament rupture had a higher posterior intercondylar eminence

BackgroundTo evaluate the anatomic geometry of the posterior intercondylar eminence and its association with PCL injury risk.MethodsPatients who underwent primary PCL reconstruction from 2015 to 2018 were retrospectively analyzed. The control group included inpatients diagnosed with ACL rupture because of a sports-related accident during the same period, matched by age, gender, height, weight, and side of injury. Measurements of the height of the apex of the posterior intercondylar eminence (HPIE), the slope length (SLPIE) and the slope angle (SAPIE) of the posterior intercondylar eminence were performed using conventional MRI scans assessed by 2 blinded, independent raters. Intraclass correlation coefficients (ICCs) was used to evaluate the consistency of measurement results. Independent sample t tests, Chi-square tests, and logistic analyses were used to compare the two group, with P < 0.05 considered statistically significant.ResultsFifty-five patients with PCL rupture met the inclusion criteria and 55 PCL-intact matched controls were included. There were no significant differences between the groups in gender (P = 1.000), limb side (P = 0.848), age (P = 0.291), BMI (P = 0.444) or height (P = 0.290). Inter-observer reproducibility was excellent agreement in HPIE, SLPIE and SAPIE of case and control groups (ICC: HPIE = 0.81, SLPIE = 0.77, SAPIE = 0.85). Patients with PCL rupture had significantly greater HPIE, SAPIE (both P < 0.001), and SLPIE (P < 0.05) than PCL-intact patients. The multivariable analysis showed that HPIE (OR, 1.62 [95% CI, 1.24–2.11], P < 0.001) and SAPIE (OR, 1.17 [95% CI, 1.05–1.31], P < 0.001) were independent factors associated with PCL rupture.ConclusionThrough this retrospective observational study, we found that patients with PCL rupture may have a higher posterior intercondylar eminence compared to PCL-intact patients.Level of evidenceIII.

Protruding anterior medial meniscus and posterior tibial translation as secondary signs of complete and partial posterior cruciate ligament tear.

To evaluate whether measurement of protruding anterior meniscus in the medial compartment (PAMM) and posterior tibial translation (PTT) can be used as a secondary sign of posterior cruciate ligament (PCL) tear for differential diagnosis of partial or complete tear. 21 cases with complete PCL tear, 35 cases with partial PCL tear, and 55 normal cases were reviewed in this retrospective study. PTT and PAMM were measured from the MR images associated with each case. Non-parametric data were evaluated using the Kruskal-Wallis test and the Mann-Whitney U-test with Bonferroni correction to compare differences among the three groups: complete tear, partial tear, and controls. There were significant differences in the median values of PAMM among the three groups, and with PAMM increasing as the grade of PCL injury increased. However, there were no significant differences in median PTT among the three groups. Median PAMM in the partial and complete tear groups was significantly higher than in subjects without PCL rupture (adjusted p-value <0.05). Although median PAMM in subjects in the complete tear group tended to be higher than in those with a partial tear, this difference was not statistically significant (adjusted p-values ≥0.418). PAMM is more useful finding than PTT and can predict PCL tear with or without posterior instability. However, PAMM cannot differentiate partial tear and complete tear of the PCL. PAMM is more useful finding than PTT and can predict PCL tear with or without posterior instability. However, PAMM cannot differentiate partial tear and complete tear of the PCL.