Incidence of metopism is much less as compared to the incidence of incomplete metopic suture.
(7.) Woo, Ju-Kong: Racial & sexual differences in the frontal curvature and its relation to metopism. American Journal of Physical Anthropology.
(14.) Castilho SMA, Oda YJ Santana GDM: Metopism in adult skulls from Southern Brazil, Int J Morphol, 2006; 24 (1): 61-66.
(22.) Herker NG, Jahagirdhar PL & bhode DD: The study of metopism in Maharastrian.
(23.) Mangalgiri AS, Satpathi DK, Razvi R, Naik DC: Study of metopism in skulls of central India.
The incidence of metopism in Alpine skulls is 63.2%, the largest reported (Comas et al.
(2003) showed that it is more likely to detect metopism directly on the organic piece, specially incomplete metopism when it is rudimentary and near the nasion, than in studies through radiographs, because X-ray studies can mistake the metopic suture for vertical fractures close to the central line, as well as the incomplete sutures can go unnoticed.
As for the complete suture this study detected five instances of complete metopism, 7.4% (female 14.28% and male 2.32%).
with incidence of 7% in European skulls and those described by Czarnetzki (1972) apud del Sol et al., who found metopism in 11.2% of German female skulls.
Bryce, studying the incidence of metopism, stated that there is no definite relation with brachicranic, in disagreement with the data of this study, because a high index (52.71%) of brachicranics was obtained among the skulls with incomplete metopism and a small percentage of 20% (1/5) had complete metopism.