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Abstract：
UNASSIGNED: The posterior oblique ligament (POL) is the largest structure of the posteromedial knee that is at risk of injury in conjunction with the medial collateral ligament (MCL). Its quantitative anatomy, biomechanical strength, and radiographic location have not been assessed in a single investigation.
UNASSIGNED: To evaluate the 3-dimensional and radiographic anatomy of the posteromedial knee and the biomechanical strength of the POL.
UNASSIGNED: Descriptive laboratory study.
UNASSIGNED: Ten nonpaired fresh-frozen cadaveric knees were dissected and medial structures were elevated off bone, leaving the POL. The anatomic locations of the related structures were recorded with a 3-dimensional coordinate measuring machine. Anteroposterior and lateral radiographs were taken with radiopaque pins inserted into the pertinent landmarks, and the distances between the collected structures were calculated. Each knee was then mounted to a dynamic tensile testing machine, and pull-to-failure testing was performed to record the ultimate tensile strength, stiffness, and failure mechanism.
UNASSIGNED: The POL femoral attachment was a mean of 15.4 mm (95% CI, 13.9-16.8 mm) posterior and 6.6 mm (95% CI, 4.4-8.8 mm) proximal to the medial epicondyle. The tibial POL attachment center was a mean of 21.4 mm (95% CI, 18.1-24.6 mm) posterior and 2.2 mm (95% CI, 0.8-3.6 mm) distal to the center of the deep MCL tibial attachment and a mean of 28.6 mm (95% CI, 24.4-32.8 mm) posterior and 41.9 mm (95% CI, 36.8-47.0 mm) proximal to the center of the superficial MCL tibial attachment. On lateral radiographs, the femoral POL was a mean of 17.56 mm (95% CI, 14.83-21.95 mm) distal to the adductor tubercle and 17.32 mm (95% CI, 14.6-21.7 mm) posterosuperior to the medial epicondyle. On the tibial side, the center of the POL attachment was a mean of 4.97 mm (95% CI, 3.85-6.79 mm) distal to the joint line on anteroposterior radiographs and 6.34 mm (95% CI, 5.01-8.48 mm) distal to the tibial joint line on lateral radiographs, at the far posterior tibial aspect. The biomechanical pull-to-failure demonstrated a mean ultimate tensile strength of 225.2 ± 71.0 N and a mean stiffness of 32.2 ± 13.1 N.
UNASSIGNED: The anatomic and radiographic locations of the POL and its biomechanical properties were successfully recorded.
UNASSIGNED: This information is useful to better understand POL anatomy and biomechanical properties as well as to clinically address an injury with repair or reconstruction.
UNASSIGNED: To evaluate the 3-dimensional and radiographic anatomy of the posteromedial knee and the biomechanical strength of the POL.
UNASSIGNED: Descriptive laboratory study.
UNASSIGNED: Ten nonpaired fresh-frozen cadaveric knees were dissected and medial structures were elevated off bone, leaving the POL. The anatomic locations of the related structures were recorded with a 3-dimensional coordinate measuring machine. Anteroposterior and lateral radiographs were taken with radiopaque pins inserted into the pertinent landmarks, and the distances between the collected structures were calculated. Each knee was then mounted to a dynamic tensile testing machine, and pull-to-failure testing was performed to record the ultimate tensile strength, stiffness, and failure mechanism.
UNASSIGNED: The POL femoral attachment was a mean of 15.4 mm (95% CI, 13.9-16.8 mm) posterior and 6.6 mm (95% CI, 4.4-8.8 mm) proximal to the medial epicondyle. The tibial POL attachment center was a mean of 21.4 mm (95% CI, 18.1-24.6 mm) posterior and 2.2 mm (95% CI, 0.8-3.6 mm) distal to the center of the deep MCL tibial attachment and a mean of 28.6 mm (95% CI, 24.4-32.8 mm) posterior and 41.9 mm (95% CI, 36.8-47.0 mm) proximal to the center of the superficial MCL tibial attachment. On lateral radiographs, the femoral POL was a mean of 17.56 mm (95% CI, 14.83-21.95 mm) distal to the adductor tubercle and 17.32 mm (95% CI, 14.6-21.7 mm) posterosuperior to the medial epicondyle. On the tibial side, the center of the POL attachment was a mean of 4.97 mm (95% CI, 3.85-6.79 mm) distal to the joint line on anteroposterior radiographs and 6.34 mm (95% CI, 5.01-8.48 mm) distal to the tibial joint line on lateral radiographs, at the far posterior tibial aspect. The biomechanical pull-to-failure demonstrated a mean ultimate tensile strength of 225.2 ± 71.0 N and a mean stiffness of 32.2 ± 13.1 N.
UNASSIGNED: The anatomic and radiographic locations of the POL and its biomechanical properties were successfully recorded.
UNASSIGNED: This information is useful to better understand POL anatomy and biomechanical properties as well as to clinically address an injury with repair or reconstruction.
摘要：
■后斜韧带（POL）是后内侧膝关节的最大结构，与内侧副韧带（MCL）一起存在受伤风险。它的定量解剖学，生物力学强度,和射线照相位置没有在一次调查中进行评估。
■评估后内侧膝关节的3维和影像学解剖结构以及POL的生物力学强度。
■描述性实验室研究。
■解剖了10个未配对的新鲜冷冻尸体膝盖，内侧结构从骨骼上抬高，离开POL。用三维坐标测量机记录相关结构的解剖位置。在相关标志中插入不透射线的针脚，拍摄前后和侧向X光片。并计算了所收集结构之间的距离。然后将每个膝盖安装到动态拉伸试验机上，并进行拉伸至失效测试以记录极限拉伸强度，刚度,和失败机制。
■POL股骨附着平均为15.4mm（95％CI，13.9-16.8mm），内侧上髁近端为6.6mm（95％CI，4.4-8.8mm）。胫骨POL附着中心在深层MCL胫骨附着中心的后部平均21.4mm（95％CI，18.1-24.6mm）和2.2mm（95％CI，0.8-3.6mm），在浅层MCL胫骨附着中心的后部平均28.6mm（95％CI，24.4-32.8mm）和41.9mm（95％CI，36.8-47.0mm）。在横向射线照片上，股骨POL位于内收肌结节远端平均17.56mm(95%CI,14.83-21.95mm),位于内侧上髁后上方17.32mm(95%CI,14.6-21.7mm).在胫骨侧,POL附着中心在前后位X线片的关节线远端平均为4.97mm(95%CI,3.85-6.79mm),在外侧位X线片的胫骨关节线远端平均为6.34mm(95%CI,5.01-8.48mm),在胫骨后部。生物力学拉伤后的平均极限抗拉强度为225.2±71.0N，平均刚度为32.2±13.1N。
■成功记录了POL的解剖和影像学位置及其生物力学特性。
■此信息有助于更好地了解POL的解剖结构和生物力学特性，并有助于临床修复或重建损伤。
■评估后内侧膝关节的3维和影像学解剖结构以及POL的生物力学强度。
■描述性实验室研究。
■解剖了10个未配对的新鲜冷冻尸体膝盖，内侧结构从骨骼上抬高，离开POL。用三维坐标测量机记录相关结构的解剖位置。在相关标志中插入不透射线的针脚，拍摄前后和侧向X光片。并计算了所收集结构之间的距离。然后将每个膝盖安装到动态拉伸试验机上，并进行拉伸至失效测试以记录极限拉伸强度，刚度,和失败机制。
■POL股骨附着平均为15.4mm（95％CI，13.9-16.8mm），内侧上髁近端为6.6mm（95％CI，4.4-8.8mm）。胫骨POL附着中心在深层MCL胫骨附着中心的后部平均21.4mm（95％CI，18.1-24.6mm）和2.2mm（95％CI，0.8-3.6mm），在浅层MCL胫骨附着中心的后部平均28.6mm（95％CI，24.4-32.8mm）和41.9mm（95％CI，36.8-47.0mm）。在横向射线照片上，股骨POL位于内收肌结节远端平均17.56mm(95%CI,14.83-21.95mm),位于内侧上髁后上方17.32mm(95%CI,14.6-21.7mm).在胫骨侧,POL附着中心在前后位X线片的关节线远端平均为4.97mm(95%CI,3.85-6.79mm),在外侧位X线片的胫骨关节线远端平均为6.34mm(95%CI,5.01-8.48mm),在胫骨后部。生物力学拉伤后的平均极限抗拉强度为225.2±71.0N，平均刚度为32.2±13.1N。
■成功记录了POL的解剖和影像学位置及其生物力学特性。
■此信息有助于更好地了解POL的解剖结构和生物力学特性，并有助于临床修复或重建损伤。
