パノラマ X 線写真に描出される解剖学的指標の加齢的変化
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概要
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The purpose of this study is to determine the use of panoramic radiography in observing the anatomical changes in the jaw bones as the result of aging. To study the effect of aging, the focus was the floor and posterior wall of the maxillary sinus, panoramic innominate line, pterygopalatine fossa, nasolacrimal duct, and ossification of the stylohyoid ligament and thickness of the mandibular cortical bone. Eight hundred panoramic radiographs, from routine radiological examinations at the Department of Dental Radiology, Kyushu Dental College Hospital, were used in this study. These were of both males and females ranging in age from 3 to 91 years old. The radiographs were classified by decade. Each decade consisted of 50 radiographs of males and 50 of females. The results obtained were as follows : 1. The maxillary sinus floors in the first decade of both males and females were not clearly observed. In the third decade, the maxillary sinus floors were clearly observed. However, by the fifth decade, the maxillary sinus floors were not noticeable. 2. The maxillary sinus posterior walls of both males and females were clearly observed in the second, third, and fifth decades. These maxillary sinus posterior walls were more evident in the females than in the males through all of the decades. 3. The panoramic innominate lines in the third decade in males and females were well observed. After the fourth decade, the panoramic innominate lines gradually decreased until the seventh decade. From the seventh to the eighth decades, the innominate lines did not change. 4. The pterygopalatine fossae of females were clearly observable in the first decade but in males, they were not seen until the second decade. After which both males and females continued the same. 5. The nasolacrimal ducts of males were clearly seen during the third decade, but in females, such occured during the second decade. In males and females, these gradually decreased by aging. 6. There was a high percentage of ossification of the stylohyoid ligament in males and females in the second decade. This reached its highest percentage in the seventh decade. 7. The thickness of the mandibular cortical bone in males and females increased rapidly during the second decade. However, in males it remained constant from the fourth until the eigth decade. In females, on the other hand, it then decreased in the eighth decade. It was apparent that there were differences (P<0.05) between males and females on the cortical bone thickness through the each decade. The thickness of the cortical bone in males remained constant during the second and eighth decades.
- 九州歯科学会の論文
- 1999-02-25