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
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.
Available from: Yawei Du
- "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  . 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.
Available from: Miroslav Trajanovic
- "The acetabular depth (AD) is another important parameter of the hip dysplasia . Normal value of this parameter above 9 mm and below of this value is referred as dysplasia . 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 . "
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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.
- "QS data fitting was previously widely used, but mainly for specific bone areas (e.g., isolated condyles, femoral head shape and neck orientation; Cerveri et al., 2010; Lee et al., 2006; Saikia et al., 2008; Xi et al., 2003; Toogood et al., 2009). All bone surface related data (Fig. 1) before data fitting were converted in bone Local Coordinate System (LCS) according to Appendix A, Annex B. "
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ABSTRACT: Quadric surface fitting of joint surface areas is often performed to allow further processing of joint component size, location and orientation (pose), or even to determine soft tissue wrapping by collision detection and muscle moment arm evaluation. This study aimed to determine, for the femoral bone, if the position of its morphological joint centers and the shape morphology could be approximated using regression methods with satisfactory accuracy from a limited amount of palpable anatomical landmarks found on the femoral bone surface. The main aim of this paper is the description of the pipeline allowing on one hand the data collection and database storage of femoral bone characteristics, and on the other hand the determination of regression relationships from the available database. The femoral bone components analyzed in this study included the diaphysis, all joint surfaces (shape, location and orientation of the head, condyles and femoro-patellar surface) and their respective spatial relationships (e.g., cervico-diaphyseal angle, cervico-bicondylar angle, intercondylar angle, etc.). A total of 36 morphological characteristics are presented and can be estimated by regression method in in-vivo applications from the spatial location of 3 anatomical landmarks (lateral epicondyle, medial epicondyle and greater trochanter) located on the individual under investigation. The method does not require any a-priori knowledge on the functional aspect of the joint. In-vivo and in-vitro validations have been performed using data collected from medical imaging by virtual palpation and data collected directly on a volunteer using manual palpation through soft tissue. The prediction accuracy for most of the 36 femoral characteristics determined from virtual palpation was satisfactory, mean (SD) distance and orientation errors were 2.7(2.5)mm and 6.8(2.7)°, respectively. Manual palpation data allowed good accuracy for most femoral features, mean (SD) distance and orientation errors were 4.5(5.2)mm and 7.5(5.3)°, respectively. Only the in-vivo location estimation of the femoral head was worse (position error=23.2mm). In conclusion, results seem to show that the method allows in-vivo femoral joint shape prediction and could be used for further development (e.g., surface collision, muscle wrapping, muscle moment arm estimation, joint surface dimensions, etc.) in gait analysis-related applications.
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