Yamatsu Kenta, Hayashi Mizuho, Takashima Hiroyuki, Watanabe Kota
Graduate School of Health Sciences, Sapporo Medical University, Japan.
Graduate School of Health Sciences, Sapporo Medical University, Japan.
Foot (Edinb). 2023 Mar;54:101968. doi: 10.1016/j.foot.2023.101968. Epub 2023 Feb 3.
Bone morphology is one of the factors involved in hallux valgus development. However, previous studies have not evaluated the overall bone shape in three dimensions. This study aimed to compare the overall shape of the first proximal phalanx and first metatarsal in hallux valgus with those of normal feet.Homologous models were created from computed tomography data of the first proximal phalanx and first metatarsal of 75 healthy men and 53 women in the control group and 10 men and 71 women in the hallux valgus group. Principal component analysis was performed to examine the differences in bone morphology between the control and hallux valgus groups. In men and women with hallux valgus, the proximal articular surface of the first proximal phalanx was characterized by a more lateral inclination and torsion of the pronated first metatarsal. Additionally, the first metatarsal head was characterized by a more lateral inclination in male hallux valgus. This study is the first to reveal the morphological characteristics of the first metatarsal and first proximal phalanx in hallux valgus as a whole bone using a homologous model technique. These characteristics are considered possible causes of hallux valgus development. The shapes of the first proximal phalanx and first metatarsal in hallux valgus were different from those in normal feet. This finding should be useful when considering the pathogenesis and treatment development for hallux valgus.
骨形态是拇外翻发展过程中的影响因素之一。然而，以往的研究尚未对三维整体骨形态进行评估。本研究旨在比较拇外翻患者的第一近节趾骨和第一跖骨的整体形态与正常足的相应部位。从对照组75名健康男性和53名健康女性以及拇外翻组10名男性和71名女性的第一近节趾骨和第一跖骨的计算机断层扫描数据创建了同源模型。进行主成分分析以检验对照组和拇外翻组之间的骨形态差异。在患有拇外翻的男性和女性中，第一近节趾骨的近端关节面的特征是第一跖骨内旋时更向外倾斜和扭转。此外，在男性拇外翻中，第一跖骨头的特征是更向外倾斜。本研究首次使用同源模型技术揭示了拇外翻中第一跖骨和第一近节趾骨作为整体骨的形态特征。这些特征被认为是拇外翻发展的可能原因。拇外翻中第一近节趾骨和第一跖骨的形状与正常足不同。这一发现对于考虑拇外翻的发病机制和治疗发展应该是有用的。
