Journal of Clinical and Diagnostic Research, ISSN - 0973 - 709X

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Original article / research
Table of Contents - Year : 2016 | Month : September | Volume : 10 | Issue : 9 | Page : AC10 - AC13

Anatomical and Radiological Aspects of the Supratrochlear Foramen in Brazilians AC10-AC13

Carlos AA Chagas , Gabriel Gutfiten-Schlesinger, Túlio FO Leite, Lucas AS Pires, Julio G. Silva

Dr. Carlos AA Chagas,
Department of Morphology, Biomedical Center, Fluminense Federal University
Av. Prof. Hernani Mello 101, CEP 24.210-150, Niterói, Rio de Janeiro, Brazil.

Introduction: The supratrochlear foramen is an anatomic variation of great clinical and anthropologic interest. Although many studies addressed this subject in different ethnic groups, there are no studies regarding Brazilians.

Aim: To verify the incidence and morphometric measures of the supratrochlear foramen in Brazilian humeri.

Materials and Methods: A total of 330 dry humeri were analysed and divided in three groups: bones presenting the supratrochlear foramen (Group 1), bones displaying a translucent foramen (Group 2) and humeri without the foramen (Group 3). The aperture was measured with a digital vernier caliper. Radiographic pictures with different incidences were taken.

Results: Our analysis showed that 22.5% of humeri belonged in Group 1, 41.2% in Group 2, and 36.3% in Group 3. The mean vertical diameter and the mean horizontal diameter of the supratrochlear foramen on the left side were 2.779±2.050 mm and 2.332±1.23 mm, respectively. The mean vertical diameter and the mean horizontal diameter of the foramen on the right side were 2.778±2.197 mm, and 2.365±1.396 mm, respectively. The student’s t-test showed that there was no significant difference regarding the size of the foramen between both sides. The best X-ray machine setup was 50 kilo voltage and 0.08 milliamperage per second, associated with a slight increase in the distance of the x-ray tube.

Conclusion: The aperture seems to be the key point during the pre-operative planning of intramedullary fixation, since it has direct relation to the size of the intramedullary canal, thus, being an entity of clinical, anatomical, anthropological, radiological, and surgical interest.