無歯顎パノラマ X 線写真に描出された上顎洞底と下顎管に関する研究
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概要
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Of the panoramic radiographs kept in the Department of Dental Radiology at Kyushu Dental College Hospital, 210 panoramic radiographs of edentulous jaws were investigated. Items for investigation were the distance from the floor of the nasal cavity to the floor of the maxillary sinus, the distance from the floor of the maxillary sinus to the maxillary alveolar crest, the distance from the mandibular alveolar crest to the mandibular canal, and visual evidence of a mandibular canal. The measurements obtained in this study include a magnification factor. The results obtained by this study were summarized as follows : 1. The distance from the floor of the nasal cavity to the deepest point of the sinus floor on the right side was 9.4±4.62mm and was 9.4±5.05mm on the left side. The distance from the floor of the nasal cavity, beneath the infraorbital canal, to the sinus floor was 8.1±5.11mm on the right side and was 7.1±6.30mm on the left side. There was no statistical difference between the right and left sides in the distance from the floor of the nasal cavity to the floor of the maxillary sinus. 2. The distance from the deepest point of the sinus floor to the alveolar crest on the right side was 6.9±4.75mm and was 6.6±4.78mm on the left side. The distance from the floor of the maxillary sinus, beneath the infraorbital canal, to the alveolar crest was 8.0±5.03mm on the right side and was 8.7±5.79mm on the left side. There was no statistical difference between the right and left sides in the distance from the floor of the maxillary sinus to the alveolar crest. 3. Of the 210 cases, 77 (37%) revealed clear images of the superior wall of the right mandibular canal between the mandibular and mental foramina. On the left superior wall of the mandibular canal, 76 cases (36%) showed clear images. Of the 210 cases, 131 (62%) revealed clear images of the inferior wall of the right mandibular canal between the mandibular and mental foramina. On the left inferior wall of the mandibular canal, 123 cases (59%) showed clear images. There was a statistical differrence between the superior and inferior walls of the mandibular canal on the clear visualization of the image. However, there was no statistical difference between the right and left sides of the superior and inferior walls of the mandibular canal visually. 4. The distance from the alveolar crest of the mandibular molar region to the superior wall of the mandibular canal was 9.1±5.54mm on the right side and was 9.9±5.05mm on the left side. There was no statistical difference between the right and left sides on the distance from the alveolar crest of the mandibular molar region to the superior wall of the mandibular canal. From the above results it was known that there was no difference between the right and left sides on the distances from the floor of the nasal cavity to the floor of the maxillary sinus, from the floor of the maxillary sinus to the alveolar crest, and from the alveolar crest of the mandibular molar region to the superior wall of the mandibular canal in the edentulous jaws. It is also clear that the clear visualization of the superior wall of the mandibular canal between the mandibular and mental formina was less clear than that of the inferior wall.
- 九州歯科学会の論文
- 1996-02-25