Study of neck shaft angle of femur in population of Bihar

Abstract

INTRODUCTIONThe femur or thigh bone is the strongest and longest bone of the body and about 45 cm long in an average man that means approximately one fourth of the height of individual. It has upper end, lower end and a cylindrical shaft. Upper end consists of head, neck, greater and lesser trochanter, inter-trochanteric line and inter-trochanteric crest. The neck is about 5 cm long, connects the head to the shaft and is directed upward, medially and slightly forward and making an angle about 125 0 with shaft but the angle is wider in children. The elongated neck shaft angle facilitates movement at hip joint enabling the limb to swing clearly. 1The neck shaft angle is defined as the angle between the long axis of shaft of femur and long axis femoral neck.Neck shaft angle is also known as angle of inclination, angle of neck of femur, collodiaphyseal angle, cervicodiphyseal angle and collum diaphyseal angle. Normal neck shaft angle varies between 120 0 -140 0 .If the neck shaft angle is less than 120 0 is known as coxa vara, when this angle is more than 140 0 it is called coxa valga. According to study of SP Tuck et al, showed that men had mean neck shaft angle of 130 0 ±3.3, range 121-138 0 while women had a smaller mean femoral neck shaft angle of 128 0 ±1.7, range 119-137 0 . 2The knowledge of the neck shaft angle is valuable in the diagnosis and treatment of fracture of upper end of femur. The neck shaft angle can be estimated from proximal fragment of femur and required size of the length of neck can be determined to design prosthesis for the restoration

Morphometric Study of Proximal End of the Fully Ossified Human Femur: A Cross-Sectional Study

“…In a different investigation into a different population group, a wide range of changes in the neck-shaft angle was observed. The optimum neckshaft angle is greater for urban residents than for non-mechanized rural residents [26,27].…”

“…In forensic anthropology, most researchers have used a degree of correlation for deriving regression equations to estimate stature, which is an essential parameter for medico-legal investigations as it helps identify missing persons [27,13].…”

How to Assess Proximal Femoral Shortening after Nailing of Proximal Femoral Fractures? A Short Review

“…Normal NSA varies between 120° and 140°. 21 • Proximal femoral varusis defined as NSA of less than 120°, while femoral neck varus collapse is defined as a decrease in NSA greater than 10° compared with the healthy contralateral side. 14,16 • Lag screw telescoping (►Fig.…”

Femoral neck-shaft angle in Sohag population & its variation relating to age

“…The neck is about 5 cm long, connects the head to the shaft, and is pointed upward, medially, and slightly forward, forming a 125-degree angle with the femur shaft in adults, but higher in children. The expanded neck-shaft angle allows for a wide range of hip joint movement, allowing the limb to swing freely (Sinha et al, 2017). The angle produced by the neck axis and the long axis of the femur shaft is known as the neck-shaft angle (NSA).…”

“…The angle produced by the neck axis and the long axis of the femur shaft is known as the neck-shaft angle (NSA). It's also known as the femur neck angle, inclination angle, collodiaphyseal angle, cervicodiaphyscal angle (Anderson and Trinkaus, 1998) caput-collum-diaphyseal angle (CCD) (Shrestha et al, 2018), and Mikulicz angle (Sinha et al, 2017). The normal neck-shaft angle ranges from 115 to 140 degrees (with a mean of 126 degrees) (Shrestha et al, 2018).…”