Normal microscopic architecture of acetabular labrum of hip joint: a qualitative original study with clinical aspects

Kapetanakis, Stylianos; Gkantsinikoudis, Nikolaos; Dermon, A.; Kommata, V.; Papathanasiou, Jannis; Soukakos, Panagiotis; Dermon, Catherine R.

doi:10.32098/mltj.02.2017.10

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…The acetabular labrum has abundant sensory fibers, mechanoreceptors, and blood vessels in the fibrous connective tissue (16). Kapetanakis et al also found that free nerve endings and nerve end organ presence was greater in the ventral side of the acetabular labrum (21). On the other hand, although Gerhardt et al reported that sensory fibers and mechanoreceptors are present in the acetabular transverse ligament using LM after histological staining ( 22), Kılıçarslan et al concluded that it showed good vascularity with abundant free nerve fibers within the fibrous connective tissue; however, the latter group of authors did not find mechanoreceptors using neurofilament protein and S-100 protein immunohistochemistry and microscopy (23).…”

Section: Discussionmentioning

confidence: 99%

Three Dimensional Architecture of the Acetabular Transverse Ligament and its Connection with the Acetabular Labrum

Kaku

Shimada²,

Nogami

et al. 2020

Muscle Ligaments and Tendons J

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Background. We clarified the microstructure of the acetabular transverse ligament in terms of the construction and arrangement of the collagen fibers constituting the ligament and their connection with the acetabular labrum using light and scanning electron microscopy (SEM). Methods. Deparaffinized blocks were treated with 2N NaOH to digest the cell matrix, allowing the collagen fibers constituting the ligament and cartilage to be observed under SEM. Results. The acetabular transverse ligament had parallel collagen fibers with a width of 30-50 µm, which consisted of bundles with type I collagen fibrils. The collagen fibers of the transverse ligament were interwoven between the cartilage tissues of the acetabular labrum, forming a layered structure. These components seemed to be directly joined to each other histologically. However, in SEM images, the collagen fibers were not directly connected; rather, fine collagen fibers with varying diameters extending from the structures were interwoven. Conclusions. The acetabular transverse ligament had a distinctly different microstructure than the acetabular labrum. At the connection of both tissues, we found that the microstructure was not a direct adhesion but rather a structural bond, at least with respect to collagen. The results suggest that ligaments potentially attach to tissues other than bone.

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Section: Discussionmentioning

confidence: 99%

Three Dimensional Architecture of the Acetabular Transverse Ligament and its Connection with the Acetabular Labrum

Kaku

Shimada²,

Nogami

et al. 2020

Muscle Ligaments and Tendons J

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“…This region of the labrum corresponds to an area with relative paucity of blood flow, 54 yet the highest concentration of nociceptive and proprioceptive innervation, specifically at the chondrolabral junction. 55,56 Labral pathology is the most common source of intraarticular hip pain in those undergoing arthroscopy. 57 Symptomatic labral tears occur more frequently in female athletes, 49,58 particularly soccer and hockey players, golfers, and dancers, 48 likely due to the extremes of hip motion under load required in each sport.…”

Section: Intra-articular Injuries Labral Pathology and Femoroacetabul...mentioning

confidence: 99%

Section: Female Athlete Hip Injuriesmentioning

confidence: 99%

Female Athlete Hip Injuries: A Narrative Review

Borgstrom

McInnis

2020

Clinical Journal of Sport Medicine

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In this narrative review, we highlight sex-specific anatomic and biomechanical features of the hip region in female athletes, as well as the potential impact of these characteristics on observed disparities in both intra-articular and extra-articular injury patterns between female and male athletes. It is our goal to broaden the scope of knowledge related to hip pathology in active female athletes among sports medicine providers with the hope of better optimizing sport participation and performance in female athletes. Data Sources: A literature review was conducted using PubMed database and Google Scholar search engine. Search terms included sport, female, athlete, sex differences, injury, hip, and all diagnoses discussed in this review. Cross-reference of these articles identified additional resources. Main Results: Sex-specific differences in both static design and dynamic function contribute to disparities in hip injury patterns between female and male athletes. Intra-articular injuries, including labral and ligamentum teres pathology, as well as extra-articular injuries, including iliopsoas tendon dysfunction, gluteal and proximal hamstring tendinopathy, ischiofemoral impingement, bone stress injuries, and certain nerve entrapment syndromes, seem to affect female athletes more commonly than male counterparts. Conclusions: Given unique anatomic and functional considerations, the growing population of female athletes worldwide warrants specialized care and consideration. Potential predisposition to specific hip injuries should be taken into consideration during diagnostic evaluation of hip pain in the female athlete.

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“…The radiological findings of FAIS are present as an abnormal osseous deformity either at the femoral head-neck junction (cam morphology) and/or the acetabulum (pincer morphology). These deformities can generate a premature pathological abutment of the hip joint (particularly during hip flexion and/or internal rotation) and can potentially lead to labral and cartilage injuries [7][8][9][10]. Furthermore, there is strong evidence that cam morphology is a risk factor for osteoarthritis (OA) in the hip joint [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Hip pain and its correlation with cam morphology in young skiers—a minimum of 5 years follow-up

Abrahamson¹,

Jonasson²,

Sansone³

et al. 2020

J Orthop Surg Res

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Background There is conflicting evidence regarding the association between cam morphological changes and hip pain, and it remains unclear who with cam morphology will develop hip pain and who will not. This study aimed to investigate the correlation between cam morphology, hip pain, and activity level at a 5-year follow-up in young Alpine and Mogul skiers. Method All students (n = 76) at Åre Ski National Sports High School were invited and accepted participation in this prospective study at baseline. Magnetic resonance imaging (MRI) of both hips was conducted to evaluate the presence of cam morphology (α-angle ≥ 55°) and its size alongside the reporting of hip pain, type, and frequency of training by the Back and hip questionnaire, at baseline. After 5 years, the skiers were invited to complete a shortened version of the same questionnaire. Results A total of 60 skiers (80%) completed the follow-up questionnaire, of which 53 had concomitant MRI data. Cam morphology was present in 25 skiers (47.2%, 39 hips). Hip pain at baseline and at follow-up was reported in 17 (28.3%) and 22 (36.7%) skiers, respectively. No correlations were found between the activity level, the frequency, and the size of cam morphology and hip pain, except for the right hip α-angle at 1 o’clock and hip pain in skiers with cam morphology at baseline (rs = 0.49; P = 0.03) and at follow-up (rs = 0.47; P = 0.04). A total of 73.3% skiers had retired, of which 48% reported this was due to injuries. Conclusion Hip pain was not shown to be correlated, or had a low correlation, with activity level and the presence and size of cam morphology in young skiers on a 5-year follow-up. Based on these results, cam morphology or activity level did not affect hip pain to develop during 5 years of follow-up in young skiers. Furthermore, this study highlights that almost 75% of young elite skiers had retired from their elite career with almost 50% reporting that this was due to injuries sustained from skiing.

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Normal microscopic architecture of acetabular labrum of hip joint: a qualitative original study with clinical aspects

Cited by 3 publications

References 13 publications

Three Dimensional Architecture of the Acetabular Transverse Ligament and its Connection with the Acetabular Labrum

Three Dimensional Architecture of the Acetabular Transverse Ligament and its Connection with the Acetabular Labrum

Female Athlete Hip Injuries: A Narrative Review

Hip pain and its correlation with cam morphology in young skiers—a minimum of 5 years follow-up

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