ContribuiÃÃo ao estudo das variaÃÃes Ãsseas na escama occipal de crÃnio humanos

AUTOR(ES)

Karina ConceiÃÃo Gomes Machado de AraÃjo

DATA DE PUBLICAÇÃO

2003

RESUMO

Admit that interparietal, preinterparietal and suture bones result from embriological variations in the squamous part of the occipital bone. Interparietal and preinterparietal bones locate in occipital squama level within the interparietal territory, can remain separate all over life. Otherwise, suture bones develop on the border of the skull bones, principally in lambdoidal suture. Besides, suture bones can be associated with polytropic defects affecting the cranium, or metabolic defects affecting several systems of the human body. There has a good time, many authores have discussed about the geographical localization and incidence of the osseus variations in population. The aim of the present study was to investigate, macroscopically, the incidence of the osseus variations in the interparietal territory of the occipital squama of human adults skulls. A series of 250 adults skulls, of both sexes, was examined from the collections of the Departments of Morphology Pernambuco Federal University (UFPE) with 106 skulls, Sergipe Federal University (UFS) with 32, Tiradentes University (UNIT) with 25 and Bahia Federal University (UFBa) with 87. The criterion used to classify the adults skulls was the synostosis of basilar or sphenoccipital suture. It included adults skulls with the territory of occipital squama preserved in all extension. The observation of the skulls was done disarmed eye, macroscopically, and in porterior norm for identification of the possible osseus variations in occipital squama. The bones were classified in interparietal, preinterparietal and suture. In this research, it was observed occurrence of osseus variations in 23,6 % of the 250 northeastern skulls. The interparietal bones (single and multiple) were presents in 8 skulls (3,2 %), preinterparietal bones (single and multiple) in 11 cases (4,4 %) and suture bones in 40 skulls (16 %). It was observed larger occurrence of suture bones in relation to others variations, keeping a correlation. And, therefore, the form and the situation of the preinterparietal and suture bones determine their classification and each variation occurred in a different way in the frequence of the osseus variations can be associated several factors that distribute within a percentage waited in world population still were elucidate

ASSUNTO(S)

osso prÃ-interparietal osso interparietal osseus variations escama occipital variaÃÃes Ãsseas crÃnio humano anatomia patologica e patologia clinica osso sutural suture bone interparietal bone preinterparietal bone

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