Giannicola Giuseppe, Sedati Pietro, Polimanti David, Cinotti Gianluca, Bullitta Gianluca
Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, "Sapienza" University of Rome, Rome, Italy.
Department of Radiology, Campus Bio-medico University of Rome, Rome, Italy.
J Shoulder Elbow Surg. 2016 Jan;25(1):120-6. doi: 10.1016/j.jse.2015.07.003. Epub 2015 Sep 26.
The aims of our study were to quantify cartilage thickness at the minimum and maximum diameters of the radial head circumference and to investigate its influence on the size and shape of the proximal radius.
We analyzed high-definition magnetic resonance imaging scans of 78 healthy elbows in 19 men and 20 women, with a mean age of 28 (21-32) years. All measurements were estimated in the axial plane just distal to the fovea radialis. Maximum and minimum bone diameters, maximum and minimum total diameters (including cartilage thickness), and cartilage thickness were calculated. Cartilage thickness was measured at 4 different points: (1) at the articular side of the maximum diameter (point A), (2) at the nonarticular side of the maximum diameter (point B), (3) at the medial side of the minimum diameter (point C), and (4) at the lateral side of the minimum diameter (point D). Pearson correlation and t test were used for the statistical analysis.
Mean maximum and minimum bone diameters and maximum and minimum total diameters were 22.2, 21.5, 24.0, and 23.2 mm, respectively. All differences between diameters were statistically significant. Mean cartilage thickness at points A, C, and D was 1.7, 0.8, and 0.8 mm, respectively. No measurable cartilage thickness was found at point B. No significant correlation was found between bone diameters and cartilage thickness.
Cartilage surface significantly increases and modifies the size and shape of the radial head. The observation that cartilage thickness varies between subjects and does not correlate with bone parameters suggests that the diameters of the radial head cannot be inferred from indirect measurements of dry bones or radiographs.
我们研究的目的是量化桡骨头圆周最小和最大直径处的软骨厚度，并研究其对桡骨近端大小和形状的影响。
我们分析了19名男性和20名女性的78个健康肘部的高清磁共振成像扫描，平均年龄为28（21 - 32）岁。所有测量均在桡骨凹远侧的轴平面上进行。计算最大和最小骨直径、最大和最小总直径（包括软骨厚度）以及软骨厚度。在4个不同点测量软骨厚度：（1）最大直径的关节侧（A点），（2）最大直径的非关节侧（B点），（3）最小直径的内侧（C点），以及（4）最小直径的外侧（D点）。采用Pearson相关性分析和t检验进行统计分析。
平均最大和最小骨直径以及最大和最小总直径分别为22.2、21.5、24.0和23.2毫米。各直径之间的所有差异均具有统计学意义。A、C和D点的平均软骨厚度分别为1.7、0.8和0.8毫米。在B点未发现可测量的软骨厚度。骨直径与软骨厚度之间未发现显著相关性。
软骨表面显著增加并改变了桡骨头的大小和形状。软骨厚度在个体之间存在差异且与骨参数无关这一观察结果表明，不能从干骨或X线片的间接测量推断桡骨头的直径。
