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Table 2 Comparison with previous studies dealing with innervation of human acetabular labrum

From: The innervation of the human acetabular labrum and hip joint: an anatomic study

Authors Year No. of specimens Mean age (yrs) Technique Results
Kim and Azuma[10] 1995 23 cadaveric specimens 64.8 Suzuki’s Silver stain and Immunohistology for S-100 FNEs and NEOs in all specimens. More numerous in antero-superior zone in a single specimen that was used to evaluate zone-wise distribution on electron microscope
Shirai et al.[11] 2009 10 specimens harvested during THA. - Immunohistology for Protein Gene Product (PGP) 9.5 and TumorNecrosis Factor (TNF) alpha Positive immunoreactivity in the weight bearing regions of OA patients. Negative in nonweightbearing region of OA patients. Negative in all the specimens from ONFH or NOF fracture group
   3 groups: Osteoarthritis (OA), Osteonecrosis Femoral Head (ONFH) and fracture neck of femur (NOF)  
Gerhardt et al.[12] 2012 8 hips of cadavers. 76.5 Modified Gold Chloride Staining Highest concentration in anterior zones of labrum and closer to chondro-labral junction
  10 sites of specimens from each hip.  
   Evaluated hip capsule, transverse acetabular ligament and ligamentum teres apart from labrum    
Hawersath et al.[13] 2013 44 labral specimens from 57 patients. Evaluated antero-superior labrum only, along with ligamentum teres and capsule 55.6 H and E, Immunohistology Evaluation of antero-superior labrum only. Pain-associated FNEs predominantly at the base of labrum (acetabular attachment), decreasing in the periphery. Highest concentration in the middle third (1 o’clock to 2 o’clock).
Current study 2013 20 specimens harvested during THA or hip resurfacing 60.5 H and E, and Immunohistology for S-100 FNEs and NEOs in all the specimens. Higher concentration in antero-superior and postero-superior zones as compared to antero-inferior and postero-inferior zones. Higher concentration superiorly and on the articular (chondral) side than the capsular side.