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Acetabular Labrum - Crossref

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Last Updated: 10 December 2022

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Evaluation of the labrum on postoperative magnetic resonance images: a predictor of acetabular development in developmental dysplasia of the hip

Introduction: A persistent acetabular dysplasia of the hip after open reduction may make the diagnosis of developmental dysplasia of the hip complicated due to the potential need for corrective surgery. Methods: We retrospectively reviewed 74 hips of patients with DDH who underwent open reduction after reaching walking age and being followed up radiologically until skeletal maturity. We investigated the cartilaginous acetabulum and labrum using a new technique that measures the cartilaginous and labral landmarks in patients aged 5 years, using a coronal and axial MR T2*-weighted images. Nevertheless, the poor outcome group had significantly larger cartilaginous- and labral-AIs, but had significantly higher cartilaginous- and labral-CE angles than the positive outcome group, but with significantly smaller cartilaginous- and labral-CE angles than the good outcome group. However, labral-AI u2a7e4u00b0 and the labral-CE angle 37'u00b0 on MRI at 5 years old provide useful guidelines for corrective surgery in patients with DDH.

Source link: https://doi.org/10.1177/11207000211004917


Mechanical and Biological Evaluation of Melt-Electrowritten Polycaprolactone Scaffolds for Acetabular Labrum Restoration

A degenerated or injured acetabular labrum repair or reconstruction is often required to restore or restore a hip joint's stability and health. We characterized the physical appearance and tensile mechanical characteristics of melt-electrowritten polycaprolactone scaffolds of various architectures and rated the labrum cell compatibility of selected graft candidates in this research. To determine the scaffold compatibility with primary cells, first, labrum explants were co-cultured with scaffold specimens. Two other aspects of pore size on pre-cultured seeded labrum cells were investigated. Primary labrum cells were able to migrate from co-cultured labrum tissue samples to the scaffold and grow in vitro. Wave-patterned designs simulated native labrum tissue's non-linear elastic behavior and, as a result, permitted for physiological cyclic tensile strain but showed reduced cell compatibility under dynamic loading. In conclusion, melt-electrowritten polycaprolactone scaffolds are promising candidates for labral grafts, but further research is required to ensure both the mechanical and biological compatibility.

Source link: https://doi.org/10.3390/cells11213450


Physiological stretching induces a differential extracellular matrix gene expression response in acetabular labrum cells

The acetabular labrum is a fibrocartilaginous ring surrounding the acetabulum and plays a role in hip stability and contact pressure dissipation by a sealing function. The labrum injury may lead to hip-joint degeneration and secondary osteoarthritis formation. Understanding how extracellular matrix production and remodelling is monitored is of utmost importance for successful tissue repair. The present study found that physiological stretching enhanced the metabolic activity and altered the expression of ECM genes in labrum cells. Using the quantitative polymerase chain reaction technique, primary bovine labrum cells were physiologically stretched for up to 5 d. 24 h after the previous stretch cycle. Changes in metabolic activity were found in metabolic activity were investigated using the PrestoBlue u2122 HS Cell Viability Reagent and ECM gene expression was investigated. Therefore, physiological stretching could play a role in labrum tissue homeostasis and regeneration.

Source link: https://doi.org/10.22203/ecm.v044a06


Mechanical and Cytocompatibility Evaluation of UHMWPE/PCL/Bioglass® Fibrous Composite for Acetabular Labrum Implant

Based on results obtained from literature, the mechanical inspection revealed that the UHMWPE fabric had a mean displacement of 1. 038 mm after 600 cycles, approximately 4. 5 times higher resistance than that of natural labrum. The composite was able to provide a viable environment for cell growth in Assay, live cells dominated the most prevalent occupation on the surface, assay indicating that the composite was able to provide a safe environment for cell growth. Cell adhesion and cell colony formation on the material surface were shown on both SEM photographs.

Source link: https://doi.org/10.3390/ma12060916


The relationship of the orientation of the transverse acetabular ligament and acetabular labrum to the suggested safe zones of cup positioning in total hip arthroplasty

Background In the anterior pelvic plane, there is a need to develop and validate a cup orientation that is patient specific and independent of the anterior pelvic plane. It is our belief that the transverse acetabular ligament and acetabular labrum can be used to do this. Manually selecting points on the transverse acetabular ligament and labrum determined the transverse acetabular ligament and labrum plane's orientation. Conclusions The transverse acetabular ligament and acetabular labrum provide a potential solution to the numerous challenges involved in cup placement during total hip arhroplasty. This paper explores the disparity in the appearance of these local acetabular landmarks as well as challenges regarding a set target for cup positioning.

Source link: https://doi.org/10.1177/112070000801800101


Arthroscopic Debridement Versus Refixation of the Acetabular Labrum Associated With Femoroacetabular Impingement: Updated Mean 7-Year Follow-up

Background: Short- and mid-term follow-up studies indicate that arthroscopic labral refixation/preservation results lead to superior outcomes compared to labral excision/debridement. Methods: The authors found patients who died during a period before the development of labral repair methods. Patients within the labral debridement group were considered to be repairable by the authors' new arthroscopic techniques for a string of patients. Subjective results were assessed with the new Harris Hip Score, 12-Item Short Form Health Survey, and a visual analog scale for pain preoperatively and postoperatively. Results: The mean age was 34. 0 years in the debridement group and 28. 3 years in the repair/refixation industry, with a mean follow-up of 7. 3 years. Compared to the debridement group, the mHHS, SF-12, and VAS pain scores were all significantly higher for the repair/refixation group. However, the failure rate in the debridement group did get much worse. Conclusion: In the labral repair/refixation cohort, a longer-term, >7-year follow-up comparing focal labral excision/debridement with repair/refixation demonstrated improved patient-reported outcomes and reduced failure rates. Also, amid a drastic decline in patient-related outcome scoring and a slew of promising/excellent results in both groups compared to the 3. 5-year study, there was a significant rise in failure rates among the excision/debridement group's steady decline over time, with continued improvement in both groups's excellent to excellent results in the repair/refixation group, leading to a substantial increase in failure rates over time.

Source link: https://doi.org/10.1177/03635465211067818


The Modified Longitudinal Capsulotomy by Outside-In Approach in Hip Arthroscopy for Femoroplasty and Acetabular Labrum Repair—A Cohort Study

The study was conducted in a retrospective cohort study, with twenty-two postoperative patients undergoing hip arthroscopy in our hospital from January 2019 to December 2021. All patients were diagnosed cam deformity and labrum tear during the surgery and underwent arthroscopic femoroplasty and labrum repair by the modified longitudinal capsulotomy. In three months, 6 months, and 12 months after surgery, respectively, the average mHHS was 74. 4 and 85. 7, respectively. The modified longitudinal capsulotomy with an outside-in approach is a safe and effective method for hip osteoarthroscopy, due to its ease, efficacy, and safety. This approach is quick, and the patient reported results after surgery were higher than before surgery in a short-term follow-up.

Source link: https://doi.org/10.3390/jcm11154548


Histological Changes of the Acetabular Labrum in Coxarthrosis: Labral Degeneration and Repair

Introduction The current research was intended to identify elements of histological shifts within the acetabular labrum in patients requiring total hip arthroplasty. Methods 77 patients without systemic disease or prior hip surgery were scheduled for THA with three forms of coxarthrosis: acute necrosis, idiopathic, and dysplastic coxarthrosis were examined in 77 consecutive patients. Results of infiltration and vascular proliferation in two stages of maturation with endothelial cell formation and fully developed blood vessels in 1977. The following histological changes were discovered in 77 analysed acetabular labra, foci of granular matrix breakdown, pseudocysts, intralabral c alcifications, chondrocyte apoptosis, chondrocyte apoptosis, inflammatory response with lymphocytes Conclusions The acetabular labrum is an important part of osteoarthritis' degeneration of the hip. The damaged fibrocartilage's degenerative changes may have a vascular origin and cellular infiltration, possibly as a laboratory reaction to degenerative changes.

Source link: https://doi.org/10.5301/hipint.5000425


Inverted Acetabular Labrum Causes Insufficiency-type Stress Fracture of the Femoral Head: A Biomechanical Study

The subchondral insufficiency-type fracture is linked to hip osteoarthritis, but are these fractures triggered by a single load event such as a fall fracture or repeated loading during daily life? The femoral head's fracture caused by an inverted acetabular labrum fracture caused by repeated loading of a simulated osteoporotic bone model. Methods: On 5 composite femurs without silicone rubber and 10 with 10x5 mm silicone rubber, we ran fatigue load testing on 15 osteoporotic composite femurs, using 2000 N at 1 Hz, 1 million times or worse, failure. In all ten specimens of 10 mm silicone rubber, there were fractures in the anterior femoral head, with a total number of loads to fracture of 6389.

Source link: https://doi.org/10.21203/rs.3.rs-1489643/v1


The labrum: Structure, function, and injury with femoro-acetabular impingement

Background The recognition of the importance of femoro-acetabular impingement as a potential cause of hip pain has boosted major attempts to reconstruct hip joints in order to reduce or delay the need for replacement. When treating the osseous causes of FAI, the method of injury to the labrum should be understood. Preserving or restoring labral function, as well as increasing hip mobility and protecting the articular surface, is crucial to returning the hip to normal or near-normal mechanical and physiologic function. Magnetic resonance imaging, indirect magnetic resonance arthrography, and direct magnetic resonance arthrography are among the benefits and drawbacks of diagnostic magnetic resonance imaging techniques. The paper acknowledges the labrum's intricacy, as well as providing a greater insight into how the labrum can be used to stabilize the joint and shielding the hip's articular surface.

Source link: https://doi.org/10.1007/s11832-012-0431-1

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

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* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions