上顎洞底部の形態学的研究 : CT 像の三次元構築
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概要
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Morphological study of the floor of maxillary sinus by means of three-dimensional reconstruction from facial CT images was put into practice. Materials in this study were the films of facial CT images which were taken for medical treatment of 100 patients at the out-patient clinic of oro-maxillofacial surgery, Kagoshima City Hospital. These patients consisted of 50 males and 50 females aged 20 to 39. Facial CT images of the healthy maxillary sinus were used for the 3D reconstruction. The results were as follows. 1. The morphology of the floor of maxillary sinus in 3D reconstruction from facial CT images was divided into five kinds of forms. According to 3D reconstruction, the morphology of the floor of maxillary sinus in panoramic radiographs was also divided into five kinds of forms. 2. Five kinds of forms of maxillary sinus were divided into two main groups. One group showed simple forms of the floor of maxillary sinus. The other showed complicated forms. The group of simple forms has two types and the other has three types. Each group accounted for 50% of all. 3. The group of simple forms of maxillary sinus has two types. One type is circular forms of the floor of maxillary sinus which accounted for 27% of all types. The other has flat forms of floor, which was 23%. 4. The complicated group has three types. One type has one convexity toward the lower side. This type was 17%. The type which has two convexities was 17% and another type having three convexities accounted for only 16% of the total. 5. The morphology of the floor of maxillary sinus in patients in their twenties showed simple forms in most cases, and these simple forms accounted for 87%. The morphology of the floor of maxillary sinus in patients in their thirties showed complicated forms in most cases. These complicated forms accounted for 81%. This morphological study showed that the form of floor of maxillary sinus in dentulous subjects became more complicated with advancing age.
- 九州歯科学会の論文
- 1994-12-25