Shimizu S, Edama M, Ikezu M, Matsuzawa K, Kaneko F, Kageyama I
Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan.
Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan.
Surg Radiol Anat. 2020 Mar;42(3):243-248. doi: 10.1007/s00276-020-02423-9. Epub 2020 Jan 25.
The purpose of this basic research study was to clarify the morphological characteristics of the posterior oblique fibers (POL) of the ulnar collateral ligament using a large number of specimens.
This study examined 50 arms from 25 Japanese cadavers. Type classification was performed by focusing on the positional relationship between POL morphology and the joint capsule. The morphological features measured were fiber bundle length, width, and thickness.
The POL was classified as follows: Type I, the POL's anterior and posterior edges are located on the surface of the joint capsule and can be separated as a single fiber bundle; Type II-a, the POL anterior edge can be separated, but the posterior edge cannot be separated; Type II-b, the POL posterior edge can be separated, but the anterior edge cannot be separated; and Type III, the POL cannot be separated from the joint capsule. Type I was seen in 23 elbows (46%), Type II-a in 6 elbows (12%), Type II-b in 7 elbows (14%), and Type III in 14 elbows (28%).
The results of this study suggested that the POL could be classified into an independent type and an unclear type, and the presence of the unclear type was one of the factors that caused morphological variation.
本基础研究的目的是使用大量标本阐明尺侧副韧带后斜纤维（POL）的形态特征。
本研究检查了来自25具日本尸体的50只手臂。通过关注POL形态与关节囊之间的位置关系进行类型分类。测量的形态特征包括纤维束长度、宽度和厚度。
POL分类如下：I型，POL的前缘和后缘位于关节囊表面，可作为单纤维束分离；II-a型，POL前缘可分离，但后缘不可分离；II-b型，POL后缘可分离，但前缘不可分离；III型，POL不能与关节囊分离。23个肘部（46%）为I型，6个肘部（12%）为II-a型，7个肘部（14%）为II-b型，14个肘部（28%）为III型。
本研究结果表明，POL可分为独立型和不明确型，不明确型的存在是导致形态变异的因素之一。
