Abstract:
Introduction: In human body the femur is the longest and strongest bone, it has proximal
end, shaft and distal end. The proximal end has head, neck, greater and lesser trochanters.
The Femoral Neck-Shaft Angle is the angle formed between the oblique oriented femoral
neck with the vertical shaft.
Objective: To evaluate anatomy of femoral neck shaft angle and its associated factors
radiographically among patients attending radiography room in Arba Minch Hospital, Gamo
zone, Southern Ethiopia 2019 G.C.
Method: Institution based retrospective cross sectional study design was conducted in Arba
Minch General Hospital, among selected 423 individuals. Simple random sampling
technique was performed to select study participants and the data was collected and
measured using PACS (picture archiving and communication system) software. Then
entered in to epi data version 4.4.3.1 and transferred to SPSS version 20 for analysis.
Descriptive statistics like frequencies, mean, standard deviation, range was calculated and
presented using text, tables, and charts. One way ANOVA-test was performed to compare
the difference between sex and side. The p-value ≤ 0.05 was considered as statistically
significant.
Result: A total of 846 femoral necks were analyzed from 423 patients’ pelvic radiographs
comprising of 270 males and 153 females. With the mean age of 36.98 ± 13.88 years. The
average value of Femoral Neck Shaft Angle for male is 125.75° ± 6.46° and 124.16° ± 6.10°
for female. Femoral Neck Shaft Angle correlated positively with Femoral Neck Width, Hip
Axis Length and Femoral Neck Length. But there is negative correlation between Femoral
Neck Shaft Angle and Horizontal Offset.
Conclusion: Femoral Neck Shaft Angle mean value difference was statistically significant
between males and females. The lateral difference was also noted.
Recommendation: Consideration of local population data of femoral neck shaft angle and
all other parameters of proximal femur should be made during designing and bioengineering
of orthopedic implants and hip prosthesis.
