上顎洞の解剖学的並に「レ」線学的研究-2・3-

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In order to study the condition of maxillary sinus in relation to the etiology of chronic paranasal sinusitis, the author carried out an intraoral roentgenographic study of the bony floor of the maxillary sinus of 298 cases with chronic sinusitis, and 302 normal cases, and a histological study on 32 materials of facial wall. Result are as follow.Bony cortex of maxillary sinus develops until 18_??_19 year of age in normal group, the comoletion is retanded, however, in afflicted group and the development toward antral floor is arrested at the age of 10_??_11, accompassied by the hypertrophy of the bony floor of the maxillary antrum.There is no significant difference in the condition of the bony floor of the maxillary antrumc between young adult (20_??_35year) and aged (36_??_59year).The relationship between the chronic paranasal sinusitis and the maldevelopment of sinus was seen in a little less than 30%, which is signicantly defferent from normal control group.Histopathological study showed inflammatory change of facial wall in 4 cases (12.5%), bony change due to reconstruction in 30 cases (93.8%).Bone absorption appered to be common in those cases with well developed maxillay sinus, and osteoblastic activity was marked in cases with maldeveloped maxillary sinus.
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