Cinotti Gianluca, Sessa Pasquale, Ragusa Giovanni, Ripani Francesca Romana, Postacchini Roberto, Masciangelo Raffaele, Giannicola Giuseppe
Department of Anatomy, Histology, Medico Legal and Orthopaedic Sciences, University La Sapienza, Rome, Italy.
Clin Anat. 2013 Oct;26(7):883-92. doi: 10.1002/ca.22118. Epub 2012 Jun 21.
We analyzed the magnetic resonance studies of the knee in 80 subjects, 45 men and 35 women with a mean age of 38.9 years, who showed no pathological condition of the joint. Using an imaging visualization software, the sagittal longitudinal axis of the tibia was identified. The angle between this axis and a line tangent to the bone profile of the tibial plateau (bone slope) and to the superior border of the menisci (meniscal slope) were calculated. Thickness of anterior and posterior portion of menisci and underlying cartilage were also measured. The bone slope averaged 8° and 7.7° on the medial and lateral sides, respectively. The mean meniscal slope was 4.1° and 3.3° on the medial and lateral sides, respectively, with a significant difference compared with the bone slope. Menisci and underlying cartilage were significantly thicker in their posterior than their anterior portion (7.6 and 5.2 mm, respectively, in the medial compartment; 8.6 and 5.2 mm, respectively, in the lateral compartment). The presence of cartilage and menisci implies a significant decrease in the posterior tibial slope. In the lateral compartment, the greater the bone slope, the larger the difference between bone and meniscal slope, which means that a marked posterior tilt of the lateral tibial plateau is decreased by the cartilage and meniscus. These findings should be taken into account in planning surgical procedures which affect the slope of the articular tibial surface.
我们分析了80名受试者的膝关节磁共振研究结果，其中45名男性和35名女性，平均年龄38.9岁，这些受试者关节无病理状况。使用成像可视化软件，确定胫骨的矢状纵轴。计算该轴与胫骨平台骨轮廓切线（骨斜率）以及半月板上缘切线（半月板斜率）之间的角度。还测量了半月板前后部以及下方软骨的厚度。内侧和外侧的骨斜率平均分别为8°和7.7°。内侧和外侧的平均半月板斜率分别为4.1°和3.3°，与骨斜率相比有显著差异。半月板及下方软骨的后部明显比前部厚（内侧间室分别为7.6和5.2毫米；外侧间室分别为8.6和5.2毫米）。软骨和半月板的存在意味着胫骨后倾明显减小。在外侧间室，骨斜率越大，骨斜率与半月板斜率之间的差异越大，这意味着外侧胫骨平台明显的后倾被软骨和半月板减小。在规划影响胫骨关节面斜率的手术程序时应考虑这些发现。
