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 Jun;42(6):691-693. doi: 10.1007/s00276-019-02417-2. Epub 2020 Jan 6.
The deep component of the posterior inferior tibiofibular ligament (PITFL) was classified by type in this large-scale cadaveric study to provide basic information that will help elucidate the mechanisms underlying ankle joint posterior impingement syndrome.
This investigation examined 100 legs from 49 Japanese cadavers (mean age at death, 79 ± 11 years; 58 sides from men, 42 from women). In classification, absence of an independent fiber of the deep component of the PITFL were classified as Type I, an independent fiber of the deep component of the PITFL was classified as Type II-a, an independent fiber of the deep component of the PITFL with bundles of fibers connected to the posterior intermalleolar ligament (PIML) was classified as Type II-b, and an independent fiber of the deep component of PITFL with a band shape connected to the PIML was classified as Type III.
A deep component of the PITFL was present in all specimens. An independent fiber of the deep component of the PITFL was present in 37 legs (37%), connecting to the deep component of the PITFL and PIML in 26 (70.3%). Several types of deep component of the PITFL were identified: Type I in 63 legs (63%); Type II-a in 11 (11%); Type IIb in 12 (12%); and Type III in 14 (14%). No significant differences were seen between the right and left legs. Type I male were significantly more than Type I female (p < 0.05). Type III female were significantly more than Type III male (p < 0.05).
Strong relationships exist between the PITFL and PIML.
本大规模尸体研究对下胫腓后韧带深层（PITFL）深部成分进行了分型，旨在为踝关节后撞击综合征的发病机制提供基础信息。
本研究共检测了 49 具日本尸体（死亡时平均年龄为 79±11 岁；男性 58 侧，女性 42 侧）的 100 条腿。在分类中，将 PITFL 深部成分无独立纤维者分为 I 型，有独立纤维者分为 II-a 型，PITFL 深部成分有独立纤维且与后踝间韧带（PIML）纤维束相连者分为 II-b 型，PITFL 深部成分有独立纤维且呈带状与 PIML 相连者分为 III 型。
所有标本均存在 PITFL 深部成分。37 条腿（37%）存在 PITFL 深部成分的独立纤维，与 PITFL 和 PIML 深部成分相连的有 26 条（70.3%）。发现了几种类型的 PITFL 深部成分：I 型 63 条腿（63%）；II-a 型 11 条腿（11%）；II-b 型 12 条腿（12%）；III 型 14 条腿（14%）。左右腿之间未见明显差异。男性 I 型明显多于女性 I 型（p<0.05）。女性 III 型明显多于男性 III 型（p<0.05）。
PITFL 与 PIML 之间存在密切关系。
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