ObjectiveTo explore the effectiveness of one-stage posterior medial corner (PMC) repair or reconstruction combined with anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL) reconstruction in treating KD-ⅢM dislocation. Methods The clinical data of 15 patients with knee KD-ⅢM dislocation who met the selection criteria between January 2016 and July 2019 were retrospectively analyzed. There were 9 males and 6 females, aged 22-61 years (mean, 40.3 years). Injuries were caused by violence of flexion, valgus, and external rotation, including 10 cases of traffic accident injuries, 3 cases of crush injuries, 1 case of winch injury, and 1 case of explosion injury. The time from injury to operation ranged from 3 days to 6 months, with an average of 18.5 days. PMC repair combined with PCL+ACL reconstruction was performed in 10 cases in acute stage (within 3 weeks after injury), including 3 cases of irreducible dislocation. PMC+PCL+ACL reconstruction was performed in 5 cases with chronic dislocation. Before operation and at last follow-up, the knee joint function was evaluated by Lysholm score and International Knee Documentation Committee (IKDC) 2000 score. KT-3000 was used to evaluate the forward stability of the knee (calculated the difference of tibial anterior displacement of both knees), the X-ray films of the stress position of the knee joint was used to evaluate the valgus of the knee (calculated the difference of medial joint space width of both knees) and the backward stability (calculated the difference of tibial posterior displacement of both knees), and the internal and external rotation stability was evaluated by knee flexion 30° tibial external rotation and knee flexion 90° tibial internal rotation tests (calculated the difference of tibial internal rotation and the difference of tibial external rotation of both knees). Results The operation time was 120-240 minutes, with an average of 186.5 minutes. Patients were followed up 24-48 months, with an average of 27.4 months. There was no complication such as infection, deep vein thrombosis, vascular injury, or heterotopic ossification. At last follow-up, the Lysholm score, IKDC2000 score, the difference of tibial anterior displacement of both knees, the difference of medial joint space width of both knees, the difference of tibial posterior displacement of both knees, the difference of tibial internal rotation and the difference of tibial external rotation of both knees significantly improved when compared with preoperative ones (P<0.05). According to the IKDC2000 valgus stability grading standard, there were 3 cases of grade C and 12 cases of grade D before operation, and 10 cases of grade A and 5 cases of grade B at last follow-up, which was significantly improved when compared with that before operation (Z=−4.930, P=0.000). At last follow-up, the pivot shift tests of 15 patients were negative. The anterior and posterior drawer tests of 10 patients were negative, 5 patients had mild instability, both the anterior and posterior drawer tests were positive. ConclusionKD-ⅢM dislocation of the knee joint can lead to the posterior medial and anterior instability. Acute dislocation combined with “dimple sign” requires surgical reduction as soon as possible to repair PMC and reconstruct PCL and ACL. In chronic patients, PMC is difficult to repair, it is recommended to reconstruct PMC, PCL, and ACL at one stage to improve knee joint stability. The early and middle effectiveness are satisfactory.
ObjectiveTo conclude the effectiveness of arthroscopy combined with Burks and SchaVer's approach in the treatment of posterior cruciate ligament (PCL) avulsion fractures in a floppy lateral position. MethodsBetween May 2010 and March 2014, 21 patients with PCL avulsion fractures were treated. There were 13 males and 8 females, aged 21 to 62 years (mean, 39.1 years). The causes included traffic accident injury in 10 cases, sports injury in 5 cases, and falling injury from height in 6 cases. The time from injury to hospital was 1-6 days (mean, 2.5 days). The results of posterior drawer test were all positive, and the results of anterior drawer test and lateral stress test were all negative. The Lysholm score was 28.0±5.5 before operation. And the American Orthopaedic Foot and Ankle Society (IKDC) score was 46.2±7.6 before operation. According to Meyer standards for fractures classification, 11 cases were rated as type II and 10 cases as type III. Arthroscopy was used to inspect and treat the intra-articular lesions, then avulsion fracture was fixed by Burks and SchaVer's approach in lateral position. Postoperative functional exercises were performed. ResultsPrimary healing of incision was obtained, without nerve and vascular injury or joint infection. All patients were followed up 18-36 months (mean, 27.2 months). The X-ray films of the knee joint showed good fractures reduction and healing at 3 months after operation. The results of posterior drawer test and reverse Lachman test were negative. The knee range of motion was recovered to normal level. At last follow-up, the Lysholm score of the knee joint was significantly improved to 90.9±1.4 from preoperative one (t=54.584, P=0.000), and the IKDC score was significantly increased to 90.5±5.3 from preoperative one (t=15.638, P=0.000), including 19 cases of grade A and 2 cases of grade B. ConclusionA combination of arthroscopy and Burks and SchaVer's approach for the treatment of PCL avulsion fractures in a floppy lateral position has the advantages of minimal invasion and safe approach, short operative time, and early postoperative rehabilitation exercises, so it can provide satisfactory function recovery of the knee joint.
Objective To compare the single femoral tunnel split-double-bundle posterior cruciate ligament (PCL) reconstruction with the singlebundle PCL reconstruction and to discuss the advantages of the modified reconstruction method. Methods Fourteen donated fresh-frozen human knee specimens were biomechanically tested, which included knee specimens from 12 males and 2 females, and their ages ranged from 20 to 31 years. The specimen length of the femur and the tibia was 20 cm. The tibial posterior translation and the PCL strains were first measured when PCL was in an intact state (the intact group, n=14). Then, PCL was cut (the cut group, n=14). The posterior translation was measured when a posterior load was applied. After that, the specimens were randomly divided into twogroups: the single-bundle group (n=7) and the double-bundle group (n=7). When the posterior load was applied to the tibia, the bundle strain and the tibial posterior translation were measured with the knees flexed at 0, 30, 60, 90 and 120°, respectively. Results While a 100 N posterior force was applied, the posterior tibial displacement of the intact PCL knee ranged from 1.97±0.29 mm to 2.60±0.23 mm at the different knee flexion angles. In the PCL-cutstate, the tibial displacement increased significantly from 11.27±1.06 mm to14.94±0.67 mm (P＜0.05). After the singlebundle reconstruction, the posterior tibial translation ranged from 1.99±0.19 mm to 2.72±0.38 mm at the different knee flexion angles. In the split-double-bundle reconstruction, the posterior tibial translations ranged from 2.27±0.32 mm to 3.05±0.44 mm. The graft of the single-bundle reconstruction was tensioned from 0° to 120°, and the tibial displacement increased significantly at 90° compared with that at theother angles(P＜0.05). In the doublebundle reconstruction, the anterolateral bundle and the posteromedial bundle were tensioned in a reciprocal fashion, and the tibial displacement had no significant difference at the five kinds of the flexion angles. ConclusionThe single femoral tunnel split-double-bundle PCL reconstruction canrestore the posterior tibial displacement at different flexion angles, and the tibial displacement in the single-bundle PCL reconstruction knee can be increased when the knee flexion is at 90°. In the double-bundle reconstruction, the graftcan be tensioned in a reciprocal fashion and the biomechanical features can be nearer to those of the normal PCL bundles.
ObjectiveTo compare the early effectiveness of arthroscopic suture bridge technique and conventional double tunnel suture technique in the treatment of avulsion fracture of posterior cruciate ligament (PCL) insertion.MethodsBetween June 2013 and December 2018, 62 patients with tibial avulsion fracture of PCL insertion that met the criteria were selected and randomly divided into trial group (using arthroscopic suture bridge technique) and control group (using conventional double tunnel suture technique), 31 cases in each group. There was no significant difference in gender, age, injured side, cause of injury, time from injury to operation, Meyers & McKeever classification, Kellgren-Lawrence classification, and preoperative knee range of motion, difference of posterior relaxation of bilateral knee joints, International Knee Documentation Committee (IKDC) score, and Lysholm score between the two groups (P>0.05). The operation time and IKDC score, Lysholm score, knee range of motion, the difference of posterior relaxation of bilateral knee joints (measured by KT-2000 under knee flexion of 90° and 30 lbs) were recorded and compared between the two groups before operation and at 3 and 12 months after operation.ResultsBoth groups successfully completed the operation, and the operation time of the trial group and the control group were (61.81±6.83) minutes and (80.42±4.22) minutes respectively, showing significant difference between the two groups (t=12.911, P=0.000). All the incisions healed by first intention, and there was no wound infection and other early postoperative related complications. All patients were followed up 13-18 months (mean, 14.6 months). The fractures in both groups healed at 3 months after operation. No knee pain, limited movement, or other complications occurred. At 3 and 12 months after operation, the IKDC score, Lysholm score, knee range of motion, and the difference of posterior relaxation of bilateral knee joints in both groups were significantly improved when compared with preoperative ones, and further improved at 12 months after operation when compared with at 3 months after operation (P<0.05). At each time point after operation, the above indexes and the grade of the difference of posterior relaxation of bilateral knee joints in the trial group were significantly better than those in the control group (P<0.05).ConclusionArthroscopic suture bridge technique in the treatment avulsion fracture of PCL insertion is simple and reliable, which can significantly improve the function and stability of the knee joint and obtain satisfactory early effectiveness.
目的:对同侧胫腓骨骨折、髋关节骨折后脱位合并膝后交叉韧带损伤的创伤机制及诊断进行分析探讨。方法:对2007年1月至2008年6月收治的7例同侧胫腓骨骨折、髋关节骨折后脱位合并膝后交叉韧带损伤患者的临床资料、诊治经过和随访结果进行总结分析。结果: 胫腓骨开放性骨折3例(42.9%),闭合性骨折4例(57.1%);髋关节均有后脱位,其中伴有髋部骨折5例(71.4%)。膝后交叉韧带实质部断裂4例(57.1%),胫骨止点撕脱骨折3例(42.9%)。7例患者获平均14.7个月(12～18个月)随访。Lysholm膝关节功能评分术后6月95.8±3.71,术后12月97.6±2.7。结论:明确同侧胫腓骨骨折、髋关节骨折后脱位合并膝后交叉韧带损伤的创伤机制,全面、准确、系统的问诊查体和完善的辅助检查是早期确诊、提高疗效的关键。
【摘要】 目的 探讨关节镜辅助下经腘窝小切口应用锚钉固定治疗后交叉韧带胫骨止点粉碎骨折的临床效果。 方法 2007年2月-2008年12月对22例急性后交叉韧带胫骨止点骨折患者，采用关节镜辅助下经腘窝小切口切开复位，利用缝合锚钉重建止点，固定治疗后测试交叉韧带的张力和稳定，采用Lysholm膝关节功能评分评定膝关节功能。 结果 骨折平均愈合时间为6周，平均屈膝活动度（120±3）°。Lysholm膝关节功能评分为（92±2）分。 结论 关节镜辅助经腘窝小切口锚钉固定治疗后交叉韧带胫骨止点粉碎骨折，可协助诊断关节内韧带及骨折损伤情况，对韧带止点进行重建，操作简便，早期功能锻炼有助于关节功能恢复。【Abstract】 Objective To explore surgical technique and the results of arthroscopic reduction and fixation for the treatment of comminuted fracture of the posterior cruciate ligament (PCL) from the tibia using suture anchor through an posterolateral portal via popliteal fossa. Methods Twenty-two patients who were operated through an posterolateral portal via popliteal fossa, the fragment was fixed by using suture anchor to reestablish the insertion, test the tension and stabilization of PCL. Lysholm score was used to evaluate the knee function. Results The bone union was confirmed by X-ray films at the 6 weeks postoperatively. The ROM of knee joint relaxation was 120±3°. The Lysholm score was 92±2. Conclusion The displaced fragment of the comminuted fracture of the posterior cruciate ligament from the tibia can be reduced and fixed with the suture anchor arthroscopicly. Using suture anchors demonstrate a reliable and easy to use technique. Operation under arthroscopy helps diagnose and treat other complications inside knee joint. In addition, early functional exercise contributes torapid recovery of knee joint’s function.
ObjectiveTo compare the early effectiveness of minimally invasive open reduction and internal fixation via posterior median approach versus arthroscopic double-tunnel suture fixation in treatment of tibial avulsion fracture of the posterior cruciate ligament (PCL).MethodsA clinical data of 31 patients with the tibial avulsion fracture of the PCL and met the criteria between January 2015 and January 2019 was retrospectively analyzed. Nineteen patients (group A) were treated with open reduction and internal fixation with cannulated screw via posterior median approach. The other 12 patients (group B) were treated with arthroscopic double-tunnel suture fixation technique. There was no significant difference between the two groups (P>0.05) in the gender, age, side of effected limb, the injury cause, the time from injury to operation, the combined meniscus injury, Meyers & McKeever classification and preoperative Lysholm score, Tegner score, International Knee Documentation Committee (IKDC) score, and the difference of tibial posterior displacement between bilateral knees. The operation time, postoperative complications, fracture healing, and the difference of tibial posterior displacement between bilateral knees, Lysholm score, Tegner score, and IKDC score were recorded.ResultsGroup B spent significantly longer operation time than group A (t=7.347, P=0.000). No postoperative complication occurred in group B, and 1 patient in group A had a screw breakage. All patients were followed up 6-36 months (mean, 22 months). X-ray films showed that all fractures healed at 3 months after operation. At last follow-up, there was no significant difference in the patients with normal knee range of motion between the two groups (P=0.510). At last follow-up, the difference of tibial posterior displacement between bilateral knees, Lysholm score, Tegner score, and IKDC score in the two groups were superior to those before operation (P<0.05); while there was no significant difference between the two groups (P>0.05).ConclusionFor the tibial avulsion fracture of PCL, the minimally invasive open reduction and internal fixation and arthroscopic double-tunnel suture fixation can obtain similar early effectiveness. However, arthroscopic surgery has the advantages of being able to simultaneously deal with intra-articular combined injuries, avoiding internal fixator complications, and eliminating the need for secondary operation.
ObjectiveTo discuss the effectiveness of posterior cruciate ligament (PCL) reconstruction with autologous peroneus longus tendon under arthroscopy.MethodsBetween January 2016 and December 2018, 46 patients with PCL injuries were enrolled. There were 34 males and 12 females, with an average age of 40.7 years (range, 20-58 years). There were 43 cases of acute injury and 3 cases of old injury. The anterior drawer test and the posterior tibia sign were positive in 4 cases, the posterior drawer tests and the posterior tibia sign were positive in 46 cases, the varus stress tests were positive in 10 cases, and the valgus stress tests were positive in 6 cases. The difference of dial-test at 30° knee flexion between affected and healthy sides was (5.20±3.91)°. The tibia posterior displacement under posterior stress position was (12.03±2.38) mm. The Lysholm score of the knee joint was 36.68±7.89, the International Knee Documentation Committee (IKDC) score was 33.58±5.97, and the American Orthopaedic Foot and Ankle Association (AOFAS) score of the ankle joint was 97.60±1.85. PCL was reconstructed with autologous peroneus longus tendon under arthroscopy, and the combined meniscus injury, posterolateral complex injury, and anterior cruciate ligament injury were all treated according to the degree of injury.ResultsAll incisions healed by first intention. Forty patients were followed up 12-26 months, with an average of 16.0 months. At last follow-up, the Lysholm score of the knee joint was 84.85±7.03, and the IKDC score was 87.13±6.27, which were significant different from preoperative ones (t=−13.45, P=0.00; t= −39.12, P=0.00); the AOFAS score of ankle joint was 93.98±2.14, which was not significant different from preoperative one (t=8.09, P=0.90). The tibia posterior displacement under posterior stress position was (2.75±1.76) mm and the difference of dial-test at 30° knee flexion between affected and healthy sides was (1.75±2.09)°, which were significant different from preoperative ones (t=29.00, P=0.00; t=4.96, P=0.00). The posterior drawer test and the posterior tibia sign were positive in 1 case and negative in 39 cases; the anterior drawer test and the varus and valgus stress tests were all negative.ConclusionReconstruction of PCL with autologous peroneus longus tendon under arthroscopy can significantly improve the stability and function of the knee joint, with satisfactory clinical results.
ObjectiveTo study the results of high tibia osteotomy (HTO) combined with posterior cruciate ligament (PCL) reconstruction for osteoarthritis (OA) of the medial compartment with PCL injury. MethodsBetween March 2008 and June 2014, 11 patients with OA of the medial compartment and PCL injury underwent HTO combined with PCL reconstruction. There were 5 males and 6 females, aged 43-55 years (mean, 50.3 years). All patients had a trauma history, and the duration of injury was 3-5 years (mean, 3.7 years). At preoperation, Hospital for special surgery (HSS) score was 54.73±8.60, Lysholm score was 56.91±4.51, KT-1000 test was (5.71±1.13) mm, and knee range of motion (ROM) was (125.21±4.77)°. The preoperative femoral tibia angle (FTA) and posterior slope angle (PSA) of the tibia plateau were (184.82±2.40)° and (7.18±1.17)° on the X-ray film. ResultsIncisional fat liquefaction occurred in 1 case, and wound healed after dressing change; primary healing of wound was obtained in the other cases. All 11 cases were followed up 12-28 months (mean, 17 months). Bone union was observed at osteotomy site within 6 months, without delayed union or nonunion. After operation, genu varus deformity was corrected with different degrees; the stability of knees was improved in all patients; and the pain of medial knee was released significantly. At 12 months after operation, the FTA was significantly reduced to (176.64±1.96)°; at last follow-up, the HSS score was significantly increased to 88.27±4.76, KT- 1000 test was significantly reduced to (3.18±0.87) mm, and Lyholm score was significantly increased to 86.45±2.34, all showing significant differences when compared with preoperative ones (P<0.05). At last follow-up, the knee ROM was (124.63±2.98)° and the PSA was (7.91±1.30)°, showing no significant difference when compared with preoperative ones (P>0.05). ConclusionThe PSA will not be changed when a combination of HTO and PCL reconstruction is used to treat OA of the medial compartment with PCL injury if the right osteotomy site and reasonable bone graft are selected. The short-term effectiveness is good because of good recovery of the lower extremity force line and knee stability, but the long-term effectiveness remains to be further followed up.
OBJECTIVE To measure the isometric point of the attachment site in femur during the reconstruction of posterior cruciate ligament (PCL). METHODS Seven fresh knee specimens from cadavers were adopted in this experiment. The anterior, posterior, proximal, distal and central points of the PCL’s femoral attachment site were respectively anchored to the middle of the PCL’s tibial attachment site by the trial isometer wires. The length changes of the intra-articular part of the wires were recorded while the knee was flexed from 0 degree to 120 degrees by a continuous passive motion(CPM) machine. RESULTS The maximal length changes in every points were compared. It showed that the length change in anterior point was the biggest, the distal point was less than that of anterior point, and the proximal point was the least. There was significant difference between proximal and posterior points, but no significant difference between proximal and central points, neither between central and posterior points. All of the maximal length changes of proximal, central and posterior points were not greater than 2 mm. CONCLUSION The femoral tunnel for the PCL reconstruction should be located at the proximal point, which is the middle point of upper edge of femoral attachment site. The selected point for femoral tunnel also may be moved slightly in the direction to central or posterior points according to the needs of operation.