Stylianos Kapetanakis1, Nikolaos Gkantsinikoudis1, Antonios Dermon2, Vassiliki Kommata3, Jannis Papathanasiou4, Panagiotis Soukakos2, Caterina Dermon3. 1. Department of Anatomy, Medical School of Alexandroupolis, Democritus University of Thrace, Greece. 2. Department of Orthopaedic Surgery, Amalia Fleming Hospital, Athens, Greece. 3. Lab of Human and Animal Physiology, Department of Biology, University of Patras, Rion, Greece. 4. Department of Medical Imaging, Allergology & Physiotherapy, Medical University of Plovdiv, Bulgaria Department of Kinesitherapy, Faculty of Public Health, Medical University of Sofia, Bulgaria.
Abstract
BACKGROUND: Normal histologic architecture of acetabular labrum, regarding presence of Free Nerve Endings (FNEs) and Nerve End Organs (NEOs) has been four times described. Nevertheless, elderly cadaveric specimens and individuals were recruited, leading to considerably high unreliability probability due to microscopic degenerative alterations. Aim of this paper is to analyze distribution pattern of FNEs and NEOs in acetabular labra of healthy middle-aged individuals, configuring thus more reliably acetabular labrum microscopic profile. MATERIALS AND METHODS: Six patients with middle age 52 ± 2.5 years were enrolled in this study. Injury of acetabular labrum and normal hip radiograph were present in all cases. Patients were all subjected to successful hip hemi-arthroplasty and derived acetabular labra were subsequently histologically processed and observed under a compound microscope. RESULTS: FNEs and NEOs were detected in all specimens. All types of NEOs were identified, including Paccini, Golgi-Mazzoni, Ruffini and Krause corpuscles. FNEs and NEOs were both in ventral part and in chondral side of labrum predominantly detected. CONCLUSION: FNEs and NEOs presence was greater in ventral side of labrum, being thus in partial agreement with previous studies results. Further study is required, in order to elucidate the exact acetabular labrum normal microscopic anatomy. LEVEL OF EVIDENCE: IV.
BACKGROUND: Normal histologic architecture of acetabular labrum, regarding presence of Free Nerve Endings (FNEs) and Nerve End Organs (NEOs) has been four times described. Nevertheless, elderly cadaveric specimens and individuals were recruited, leading to considerably high unreliability probability due to microscopic degenerative alterations. Aim of this paper is to analyze distribution pattern of FNEs and NEOs in acetabular labra of healthy middle-aged individuals, configuring thus more reliably acetabular labrum microscopic profile. MATERIALS AND METHODS: Six patients with middle age 52 ± 2.5 years were enrolled in this study. Injury of acetabular labrum and normal hip radiograph were present in all cases. Patients were all subjected to successful hip hemi-arthroplasty and derived acetabular labra were subsequently histologically processed and observed under a compound microscope. RESULTS: FNEs and NEOs were detected in all specimens. All types of NEOs were identified, including Paccini, Golgi-Mazzoni, Ruffini and Krause corpuscles. FNEs and NEOs were both in ventral part and in chondral side of labrum predominantly detected. CONCLUSION: FNEs and NEOs presence was greater in ventral side of labrum, being thus in partial agreement with previous studies results. Further study is required, in order to elucidate the exact acetabular labrum normal microscopic anatomy. LEVEL OF EVIDENCE: IV.
Entities:
Keywords:
acetabular labrum; free nerve endings; histology of acetbular labrum; nerve end organs; original article; review
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