Joint Hyperlaxity and Volar Plate Dynamics: MRI-Based Comparative Evaluation of the PIP Joint
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 32
- 试验地点
- 1
- 主要终点
- The Distance Between the Center of Motion (CoM) and the VPLip and VPTip
研究概览
简要总结
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •between 18-65 years
排除标准
- •any history of acute or overuse injuries to the examined hand,
- •any prior surgical procedures on the examined upper extremity.
结局指标
主要结局
The Distance Between the Center of Motion (CoM) and the VPLip and VPTip
时间窗: baseline
The distances between the center of motion (CoM) and the volar lip of the middle phalanx base (VPLip), and between the CoM and the proximal end of the volar plate at its attachment to the volar base of the proximal phalanx (VPTip), were measured using RadiAnt DICOM Viewer software (version 2024.1) in various PIPJ angles.
The Distance Between VPLip and VPTip
时间窗: baseline
The distance between the volar lip of the middle phalanx base (VPLip), and the proximal end of the volar plate at its attachment to the volar base of the proximal phalanx (VPTip) measured using RadiAnt DICOM Viewer software (version 2024.1) in various PIPJ angles. The purpose of this measurement was to observe how the distance between the two ends of the volar plate changes with varying joint angles.
The Distance Between Volar Plate (VP) and FDP Tendon
时间窗: baseline
The distance between the midpoint of the volar plate (VP) and the flexor digitorum profundus (FDP) tendon was measured using RadiAnt DICOM Viewer software (version 2024.1) at various proximal interphalangeal joint (PIPJ) angles. The purpose of this measurement was to observe how this distance changes across different flexion angles.
Changes Observed During Grasping and Isometric Contraction
时间窗: baseline
Measurements at all flexion angles were conducted under two conditions: while passively grasping a cylindrical object (without force) and during isometric contraction (with force).
次要结局
未报告次要终点
研究者
Cigdem Ayhan
Professor
Hacettepe University