Joint Hyperlaxity and Volar Plate Dynamics: MRI-Based Comparative Evaluation of the PIP Joint

Hacettepe University

Status: Completed

Conditions: Hypermobility, Joint

Study type: Observational

Funder types: Other

Identifiers

NCT07082075

KA22/286

Details and patient eligibility

About

Background: The volar plate (VP) is a key stabilizer of the proximal interphalangeal joint (PIPJ), and its biomechanical behavior may be altered in individuals with joint hypermobility.

Objective: This study aimed to evaluate the spatial dynamics of the VP and its relationship with the center of joint motion and flexor digitorum profundus (FDP) tendon in individuals with and without joint hyperlaxity using MRI.

Methods: Thirty-two healthy volunteers (16 hyperlax, 16 controls) underwent MRI imaging of both index fingers at five flexion angles (0°, 30°, 60°, 90°, full flexion) and under passive and isometric loading conditions. Key parameters measured included distances from the joint center to VP attachments, VP-FDP tendon distance, and the length between VP ends.

Enrollment: 32 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• between 18-65 years

Exclusion criteria

• any history of acute or overuse injuries to the examined hand,
• any prior surgical procedures on the examined upper extremity.