Anthropometric study of the hip joint in Northeastern region population with computed tomography scan

Department of Orthopedics, Guwahati Medical and Hospital, Guwahati - 781 032, Assam, India.
Indian Journal of Orthopaedics (Impact Factor: 0.64). 07/2008; 42(3):260-6. DOI: 10.4103/0019-5413.39572
Source: PubMed


Anthropometric study of the hip joint has important clinical implications and is largely unknown for the northeastern region of India. The purpose of this study is to determine the anatomic variation of the normal hip joint among the people of the northeastern region and to statistically compare them with the available data worldwide.
We evaluated 104 individuals with normal hip joints and of different ethnic backgrounds (Caucasoid and Mongoloids) clinically and by plain x- ray. One topogram of the hip joint, one axial section of the femoral head and femoral condyles of the individual was taken on CT scan. Twelve cases had center edge angle (CE) angle less than 20 degrees (unilateral/bilateral), were considered to be dysplastic and were excluded from the study. Thus the present study includes 92 individuals (184 normal hips, Mongoloids = 45; Caucasoid = 47) between 20-70 years of age. We calculated the mean of the CE angle, acetabular angle, neck shaft angle, acetabular version, femoral neck anteversion, acetabular depth and joint space width in both sexes.
The mean parameters observed were as follows: acetabular angle 39.2 degrees, centre edge angle 32.7 degrees, neck shaft angle 139.5 degrees, acetabular version 18.2 degrees, femoral neck anteversion 20.4 degrees, acetabular depth 2.5 cm and joint space width 4.5 mm.
The parameter and its values in our series shows differences when compared to the other western literatures. The neck shaft angle and the femoral neck anteversion in our individuals was 5-6 degrees more than the western literature. The remaining parameters were less or equal to the western literature.

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    • "The geometries of hip prosthesis available in the market were mostly designed roughly. Lacking of anatomy data of other population make the restoring the native anatomy for other racial patients unsatisfactorily [5] [6]. To study the morphometric features from race to race, it was helpful to do modifications on sizes and shapes of the hip components for different population. "
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    ABSTRACT: To obtain the morphological measurements of acetabulum for southern Chinese population, 40 volunteers were evaluated by CT scan. The 3D model of pelvis was reconstructed from CT scan images. The AVA, ABA and SID were measured for both sides. The mean AVA, ABA showed no significant difference for sex and both sides. But the SID showed the opposite results. The comparison of these parameters with western data were performed, and it indicated that there was significant different between our results and the data for western population published. This study may provide important reference in designing proper gender-and region-prosthesis for southern Chinese population.
    4th IEEE International Conference on Information Science and Technology; 03/2014
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    • "The acetabular depth (AD) is another important parameter of the hip dysplasia [21]. Normal value of this parameter above 9 mm and below of this value is referred as dysplasia [22]. In our study, the value of the AD was 22.01 for men and 26.47 for women, which is slightly higher compared to the values in the previous study on Malay population [15]. "
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    ABSTRACT: The acetabulum is a deep, cup-shaped, hemispherical depression on the hip bone formed medially by the pubis, above by the ilium, laterally and below by the ischium, bounded by a prominent acetabular rim. Its central part called acetabular fossa is surrounded by a curved lunate articular surface for articulation with the head of the femur Acetabular notch in the inferior part is transformed into a neurovascular foramen by the transverse acetabular ligament. Morphometric analysis was performed by measuring on volumetric multidetector CT scan images of entire pelvis (focused on acetabulum) sampled with 0.5-mm-thick slices for each subject. All data were analyzed in multiplanar reconstruction (MPR) and 3D Volume Rendering (VR). The following parameters were measured: CEA–center-edge angle (Wiberg angle), AA-acetabular index angle, SA acetabular angle of Sharp, AV- acetabular version, AD – acetabular depth, JSW-join space width , AASA anterior acetabular sector angle, PASA- posterior acetabular sector angle, Area- V- Acetabular area and volume.
    2nd International Conference Mechanical Engineering in XXI Century; 06/2013
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    • "The Indian subcontinent is mainly inhabited by people from broadly classified six main ethnic groups – Negrito, Proto – Australoids or Austrics, Mongoloids, Mediterranean or Dravidian, Western Brachycephals, Nordics or Aryans [1]. By virtue of its diverse origin , it is believed that significant anthropometric differences exist between the western population and Indian population [3] [4]. However in India, most of the available prosthesis designs are same as that available for western population. "
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    ABSTRACT: Hip replacement surgeries are on the rise in India. However, for these surgeries, most of the implants used are imported and manufactured entirely to suit the geometrical considerations of the western population. Studies in the past have shown that there are anatomical variations in the hip joint for different ethnic backgrounds and geographical locations. There is paucity of anthropometric hip joint data related to Indian population and anthropometric variations in skeletal geometry between Asian and Western counterparts have not yet been thoroughly reviewed and considered for implant manufacturing. The purpose of this anthropometric study is to determine any anatomical variations in the normal hip joint among the Indian population and to statistically compare the mean values with the existing data on western population. 422 Hip radiographs of 211 individuals (141 males and 70 females) with normal and healthy hip joints were evaluated to obtain the horizontal offset, vertical offset and neck shaft angle. For males, mean neck shaft angle was 127.68° (SD = 3.94), horizontal offset was 34.60mm (SD=6.55) and vertical offset was 39.17 mm (SD = 5.86). For females, mean neck shaft angle was 125.92° (SD = 4.75), horizontal offset was 32.96 mm (SD = 7.04) and vertical offset was 36.38 mm (SD = 6.28). When these parameters were compared to the data available from western world, there were significant anatomical variations and it was evident that there is a need to evaluate existing implants in relation to this data and possibly design the implants suited and relevant to Indian population.
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