Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players

Abstract The aim of this study was to evaluate the joint contact area of the dominant side and that of the non-dominant side without valgus instability in symptomatic pitchers. Ten symptomatic elbow medial ulnar collateral ligament (UCL) deficient baseball pitchers participated in this study. Comput...

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Autores principales:	Kyosuke Numaguchi, Daisuke Momma, Yuki Matsui, Jun Oohinata, Takayoshi Yamaguchi, Nozomu Inoue, Eiji Kondo, Norimasa Iwasaki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3fa85115352943b9bb6b6192a5aa1627
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spelling	oai:doaj.org-article:3fa85115352943b9bb6b6192a5aa16272021-12-02T17:13:17ZChanges in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players10.1038/s41598-021-99193-02045-2322https://doaj.org/article/3fa85115352943b9bb6b6192a5aa16272021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99193-0https://doaj.org/toc/2045-2322Abstract The aim of this study was to evaluate the joint contact area of the dominant side and that of the non-dominant side without valgus instability in symptomatic pitchers. Ten symptomatic elbow medial ulnar collateral ligament (UCL) deficient baseball pitchers participated in this study. Computed tomography (CT) data from the dominant and non-dominant elbows were obtained with and without elbow valgus stress. The CT imaging data of each elbow joint were reconstructed using a 3D reconstruction software package, and the radiocapitellar and ulnohumeral joint contact areas were calculated. The center of the contact area and the translation from the position without stress to the position with valgus stress were also calculated. With elbow valgus stress, the contact area changed, and the center of the radiocapitellar joint contact area translated significantly more laterally in the dominant elbow than in the non-dominant elbow (p = 0.0361). In addition, the center of the ulnohumeral joint contact area translated significantly more posteriorly in the dominant elbow than in the non-dominant elbow (p = 0.0413). These changes in contact areas could be the reason for cartilage injury at the posterior trochlea in pitchers with UCL deficiency.Kyosuke NumaguchiDaisuke MommaYuki MatsuiJun OohinataTakayoshi YamaguchiNozomu InoueEiji KondoNorimasa IwasakiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kyosuke Numaguchi Daisuke Momma Yuki Matsui Jun Oohinata Takayoshi Yamaguchi Nozomu Inoue Eiji Kondo Norimasa Iwasaki Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players
description	Abstract The aim of this study was to evaluate the joint contact area of the dominant side and that of the non-dominant side without valgus instability in symptomatic pitchers. Ten symptomatic elbow medial ulnar collateral ligament (UCL) deficient baseball pitchers participated in this study. Computed tomography (CT) data from the dominant and non-dominant elbows were obtained with and without elbow valgus stress. The CT imaging data of each elbow joint were reconstructed using a 3D reconstruction software package, and the radiocapitellar and ulnohumeral joint contact areas were calculated. The center of the contact area and the translation from the position without stress to the position with valgus stress were also calculated. With elbow valgus stress, the contact area changed, and the center of the radiocapitellar joint contact area translated significantly more laterally in the dominant elbow than in the non-dominant elbow (p = 0.0361). In addition, the center of the ulnohumeral joint contact area translated significantly more posteriorly in the dominant elbow than in the non-dominant elbow (p = 0.0413). These changes in contact areas could be the reason for cartilage injury at the posterior trochlea in pitchers with UCL deficiency.
format	article
author	Kyosuke Numaguchi Daisuke Momma Yuki Matsui Jun Oohinata Takayoshi Yamaguchi Nozomu Inoue Eiji Kondo Norimasa Iwasaki
author_facet	Kyosuke Numaguchi Daisuke Momma Yuki Matsui Jun Oohinata Takayoshi Yamaguchi Nozomu Inoue Eiji Kondo Norimasa Iwasaki
author_sort	Kyosuke Numaguchi
title	Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players
title_short	Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players
title_full	Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players
title_fullStr	Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players
title_full_unstemmed	Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players
title_sort	changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3fa85115352943b9bb6b6192a5aa1627
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Changes in elbow joint contact area in symptomatic valgus instability of the elbow in baseball players

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