Estébanez-de-Miguel E, Caudevilla-Polo S, González-Rueda V, Bueno-Gracia E, Pérez-Bellmunt A, López-de-Celis C. Ultrasound measurement of the effects of high, medium and low hip long-axis distraction mobilization forces on the joint space width and its correlation with the joint strain.
Musculoskelet Sci Pract 2020;
50:102225. [PMID:
32858316 DOI:
10.1016/j.msksp.2020.102225]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 07/17/2020] [Accepted: 07/19/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND
No study has evaluated the mechanical effect of different magnitudes of long axis-distraction mobilization (LADM) force on hip joint space width (JSW) or the association between the separation of joint surfaces and the strain on hip capsular ligaments.
OBJECTIVE
To compare the joint separation when applying three different magnitudes of LADM forces (low, medium and high) and to analyse the correlation between joint separation, strain on the inferior ilio-femoral ligament and magnitude of applied force.
DESIGN
Repeated measures controlled laboratory cadaveric study.
METHODS
Three magnitudes of force were applied to 11 cadaveric hip joints (mean age 73 years). Ultrasound images were used to measure joint separation, and strain gauges recorded inferior ilio-femoral ligament strain during each condition.
RESULTS
The magnitude of joint separation was significantly different between low (0.23 ± 0.19 mm), medium (0.72 ± 0.22 mm) and high (2.62 ± 0.43 mm) forces (p < 0.001). There were significant associations between magnitude of force, joint separation and the strain on the inferior ilio-femoral ligament during LADM (r > 0.723; p < 0.001).
CONCLUSION
Hip joint separation and ligament strain during LADM are associated with the magnitude of the applied force.
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