Purpose: The aim of this paper is to describe a technique for the visualization and mapping of focal, local cartilage thickness changes over time in magnetic resonance images of osteoarthritic knee.
Methods: Magnetic resonance imaging was performed in 25 fresh frozen pig knee joints and 15 knees of patients with borderline to mild osteoarthritis (51.2±6.3 years). Cartilage and corresponding bone structures were extracted by semi-automatic segmentation. Each point in the bone surface which was part of the bone-cartilage interface was assigned a cartilage thickness value. Cartilage thicknesses were computed for each point in the bone-cartilage interfaces and transferred to the bone surfaces. Moreover, we developed a three dimensional registration method for the identification of anatomically corresponding points of the bone surface to quantify local cartilage thickness changes. One of the main advantages of our method compared to other studies in the field of registration is a global optimization algorithm that does not require any initialization.
Results And Conclusion: The registration accuracy was 0.93±0.05 mm (less than a voxel of magnetic resonance data). Local cartilage thickness changes were seen as having follow-up clinical study for detecting local changes in cartilage thickness. Experiment results suggest that our method was sufficiently accurate and effective for monitoring knee joint diseases.
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http://dx.doi.org/10.1016/j.ejrad.2012.03.024 | DOI Listing |
Objective: This study investigated the effects of a single dose injection of mesenchymal stem cells (MSCs) under ultrasound guidance for knee osteoarthritis (KOA).
Design: The study included 30 subjects in the intervention group, who received the MSC injection and 27 in the control group who received triamcinolone. Various outcome measures, including pain levels, range of motion (ROM), and MRI parameters, were evaluated before the intervention and at different time points after treatment.
Front Surg
December 2024
Department of Spine Surgery, Hebei Medical University Third Hospital, Shijiazhuang City, Hebei, China.
Purpose: This study aims to investigate how aspirin influences lumbar degeneration by analyzing the effect of aspirin on patients with low back pain (LBP) and concurrent atherosclerosis.
Methods: Using 1:1 nearest neighbor matching based on propensity score matching (PSM), 73 patients who regularly took aspirin were assigned to the aspirin group, while another 73 patients who did not take aspirin formed the control group. Radiographs were used to measure lumbar lordosis (LL) and intervertebral height index (IHI).
BMC Musculoskelet Disord
December 2024
Department of Orthopedics, The Second Affiliated Hospital of Air Force Military Medical University (Tangdu Hospital), 569 Xinsi Road, Baqiao District, Xi'an City, Shaanxi Province, 710000, China.
Objective: To explore the relationship between meniscus compression and the severity of knee osteoarthritis.
Materials And Methods: A retrospective case-control study included 95 patients with knee osteoarthritis (OA) admitted to our hospital from April 2021 to July 2023, who were grouped into slight protrusion of meniscus group (n = 48) and severe protrusion of meniscus group (n = 47) according to the degree of meniscal extrusion. Various parameters, including Kellgren/Lawrence classification, imaging findings, cartilage damage grading, physical function assessments, and correlation analyses, were used to evaluate the relationship between meniscal extrusion and disease progression.
Indian J Orthop
January 2025
Ortho One Orthopaedic Specialty Centre, Coimbatore, India.
Introduction: Interspace defects after osteochondral autograft transfer (OATS) are filled only with fibrocartilage. Attempts have been made to address these issues in OATS with procedures like mega OATS and Hexagonal Osteochondral Graft System. We have described the functional outcomes of a hybrid technique combining a regeneration and a restoration modality to address the interspace defect in OATS.
View Article and Find Full Text PDFJ Craniofac Surg
December 2024
Department of Endocrinology and Metabolism, West China Hospital, Chengdu, China.
This study aimed to explore the construction of experimental animal models replicating cartilage defects across diverse load-bearing sites, compare self-repair conditions, and examine the role of mechanical stimulation in cartilage self-repair. Experimental animal models were established in rabbits to simulate full-thickness cartilage defects without penetrating the subchondral bone, at various load-bearing sites, including the posterior femoral condyle, anterior femoral condyle and femoral trochlear of knee joint, and the humerus of the shoulder joint. The successful exposure and construction of cartilage defects at the anterior femoral condyle, femoral trochlear, and posterior femoral condyle through the medial extension of surgical incision.
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