Abstract
The supratrochlear foramen (STF) is an important variation in the lower end of humerus. The knowledge of the presence of STF in a humerus may be important for preoperative planning for treatment of supracondylar fractures. This study aimed to find out the presence of supratrochlear foramen in lower end of humerus and to measure the dimension of it. The present study was done in 565 dry humeri of unknown sex and age, obtained from B. J. Medical College, Ahmedabad. The STF was measured using digital vernier caliper. In the present study the STF was seen in 133 cases (23.5%) of total humeri, oval shape being more common and present more frequently on left side (28%) compared to right side (19%). Most of the humeri that had no STF showed a translucency of septum, in 52.5% of the humeri. The anatomical knowledge of STF is beneficial for anthropologists, orthopaedic surgeons and radiologists in day to day clinical practice.
Highlights
A thin, transparent plate of bone known as supratrochlear septum varying in thickness from 0.5 mm to 1cm in thickness, which is lined in fresh state by the synovial membrane of elbow joint separates the olecranon and coronoid fossae
In 53 (19%) cases on the right side and in 80 (28%) cases on the left side, a supratrochlear foramen (STF) was present
The incidence of STF was greater on the left side (28%) as compared to the right side (19%)
Summary
A thin, transparent plate of bone known as supratrochlear septum varying in thickness from 0.5 mm to 1cm in thickness, which is lined in fresh state by the synovial membrane of elbow joint separates the olecranon and coronoid fossae This septum may contain several perforations and in some cases may become perforated to form an aperture known as 'supratrochlear aperture' or 'supratrochlear foramen' [STF].1. According to Hirsh (1927) the thin plate of bone between the olecranon and coronoid fossa is always present until the age of seven years, after which the bony septum occasionally becomes absorbed to form the STF2. Individuals with this variation may be able to overextend the elbow joint[3]. It has been described in various animals like dogs, hyenas, cattle, and other primates.[5,6]
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