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PSFZ - Distance from the center of the pterion to the anterior aspect of the frontozygomatic suture; PZAN - Distance from the center of the pterion to the zygomatic angle; PZA Distance from the center of the pterion to the zygomatic arch; PH - Distance from the center of the pterion to the Henle's spine; PMP - Distance from the center of the pterion to the mastoid process of the temporal bone; PI - Distance from the center of the pterion to the inion.
In our study we observed two types of the pterion Table I. The means and standard deviation of the linear measurements taken from the pterion are presented in Table II. The analysis showed that there are some differences in the measured parameters within sex examined skulls. Table I Number and percentage distribution of pterion type on the examined skulls in relation to the side and sex. Table II Results of the measured distances between the pterion and specific topographical points.
The pterion is an important anatomical landmark for neurosurgical and neurovascular interventions with the pterional approach Rodriguez Rubio et al. The morphological and morphometric variations of the pterion have been detected in various populations. Pterion type is subject to evolutionary, ethnic and regionalvariations. Morphological analysis in our study of 50 human dry skulls confirms the theory about dominance of the sphenoparietal type of the pterion. The frontotemporal and stellate types were not found in our study.
Also, some authors studied different populations to determine the most common pterion types, as can be seen in Table III. Ilknur et al. The sphenoparietal type of the pteron was dominant in both groups Frontotemporal 6. In the study of Sudha et al. Table III Comparison of different studies. In our study, a variation of the epipteric type was also found, in which one small irregular shaped epipteric bone was inserted within the pterion on one or both sides. The number of these small bones can vary.
This type is thought to occur in children with hydrocephalus, where it can complicate the neurosurgical intervention Natekar et al. Does the distance between pterion and anthropological points have different values just because of sex, age or race? While pterion type is influenced by race and ethnicity, methodology of the studies may contribute differences to the observed measurement parameters. In our study the distances from pterion to anthropological points are measured on the photographs of skulls, using the software program ImageJ.
The distance between pterion and anterior aspect of the frontozygomatic suture in our study is Mwachaka et al. Using this methodology, the results obtained are smaller than the results of this study. This study also describes the distance between pterion and posterior aspect of the frontozygomatic suture, which is on the right side Similar values were found in the study done in Nigeria using a manual vernier caliper where it was reported that distance between pterion and frontozygomatic suture is Comparison of the measurement of the distance of the pterion from the midpoint of zygomatic arch MPZ and the frontozygomatic suture FZS between sexes and sides.
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