Evaluation of femoral neck shaft angle on plain radiographs and its clinical implications

Abstract

<p class="abstract"><strong>Background:</strong> The femoral neck-shaft angle is the measurement of the angle formed between the oblique oriented neck with the vertical shaft and is an important anatomic measurement for the evaluation of biomechanics of hip.<span> The neck shaft angle is important in surgeries that involve the neck of femur, Intertrochanteric fractures, slipped capital femoral epiphysis, and developmental dysplasia of hip. Different variation of neck shaft angle has been seen in different literature and all the orthopedic implants are designed according to the values of the western literature which is different from the Indian subcontinent</span><span lang="EN-IN">.</span></p><p class="abstract"><strong>Methods:</strong> <span>Pelvic radiographs of patients who presented to Accident and emergency care or the outpatient department were used in the study</span> 110 patients radiographs were assessed in the study. There were 55 males and 55 females in our study. The mean age for males was 46.5 years and that for females was 43.2 years. The pelvis radiographs were studied for neck shaft angle .The measurements were performed bilaterally on the digital screen using the PACS (picture archiving and communication system) with handheld 360 degree goniometer.<strong></strong></p><p class="abstract"><strong>Results:</strong> The mean neck shaft angle in our study was129.26 degree for males and 126.62 degree for females .The overall mean neck shaft angle in 110 radiographs was 128.60 degree<span lang="EN-IN">. </span></p><p class="abstract"><strong>Conclusions:</strong> <span lang="EN-IN">We conclude that consideration of neck shaft angles in orthopedics surgery and designing of implant can give more angle options for the surgeons which can improve the overall prognosis of the patient.</span></p>

Photogrammetric Evaluation of Proximal Femoral Morphometric Parameters of Southern Nigerians

“…In another study done by Rogers et al [28] on 203 patients to check for side-to-side variability of the FNSA using upright anteroposterior pelvis radiographs, no significant variability between the two angles was found. Similarly, a study done in India on 110 patients using supine anteroposterior pelvis radiographs concluded that the NSA angle of the contralateral femur can be used as a template during repair [29]. Both studies [28,29] mentioned above agrees with findings of this present study.…”

“…Similarly, a study done in India on 110 patients using supine anteroposterior pelvis radiographs concluded that the NSA angle of the contralateral femur can be used as a template during repair [29]. Both studies [28,29] mentioned above agrees with findings of this present study.…”

Femoral neck shaft angle measurement on plain radiography: is standing or supine radiograph a reliable template for the contralateral femur?

“…This is similar to the finding of Chiu et al that amongst the Malaysian population, females had a significantly higher NSA than males [24]. Nevertheless, various studies have shown no differences in NSA between males and females [25,26]. Femoral neck angle measurement has various clinical implications in adults, one potential implication is to aid in determining NSA after an injury.…”

“…This is similar to the finding of Chiu et al that amongst the Malaysian population, females had a significantly higher NSA than males [ 24 ]. Nevertheless, various studies have shown no differences in NSA between males and females [ 25 , 26 ].…”

“…In a study done by Rogers et al on 203 patients to check for side-to-side variability of the NSA using upright anteroposterior pelvis radiographs, no significant variability between the two angles was found [ 29 ]. Similarly, a study done in India on 110 patients using supine anteroposterior pelvis radiographs concluded that the NSA angle of the contralateral femur can be used as a template during repair [ 25 ]. Future randomized control trials comparing the outcome of using the NSA of the contralateral femur versus other methods during surgery would provide more conclusive evidence.…”