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. 2022 Feb 28;24(1):23-28.
doi: 10.5604/01.3001.0015.7802.

Functional Instability of the Second to Fifth Metacarpophalangeal Joints

Vadym Sulyma  1 , Taras Kovalyshyn  1 , Andrii Sribniak  2 , Roman Bihun  1 , Vladyslav Krasnovskyi  1 , Yuliia Filiak  1
Affiliations

Functional Instability of the Second to Fifth Metacarpophalangeal Joints

Vadym Sulyma et al. Ortop Traumatol Rehabil. .

Abstract

Background: Clinically, functional instability (FI) of metacarpophalangeal joints (MCPJ) is not considered to represent a pathology. This excessive mobility can be detected by the application of external forces to a MCPJ at different angles. Our study aimed to measure the FI of 2nd to 5th MCPJ.

Materials and methods: A group of 36 healthy right-handed individuals were enrolled. The value of FI was measured in millimeters and verified by a CT scan. Statistical calculations was made in Statistica v.10.0.

Results: The largest values of the right and left-hand finger posterior displacement (FI) in the second to fifth MCPJ were obtained in the neutral position 0° (p<0.05). Measurements of volar displacement of the proximal phalanx second to fifth MCPJs in both hands revealed higher values at position 0° (p<0.05).

Conclusions: 1. FI of the second to fifth MCPJs is determined by anatomical configuration and dynamic stabilizers. 2. Instability measurements show that posterior displacement of the proximal phalanges is greater by at least 1 mm in the 0° neutral position.

Keywords: healthy volunteers; joint instability; metacarpophalangeal joint; non-parametric statistics.

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