数種哺乳動物の顎関節の比較形態学的研究
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概要
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The experimental mammalian were classified by the food habit into the Carnivora (Dog, Racoon Dog, and Cat), the Omnivora (Pig and Wild Boar), and the Herbivora (Sheep, Goat, and Deer). A total of 115 specimens were measured for mandibular joint and mandibular width and angle, a comparative-morphologcial study was made. The results were as follows. 1. In the morphology of articular process, mandibular neck was more constrictive in the carnivorous and herbivorous animals as compared with the omnivorous animals. 2. Mandibular caput height-width-index and mandibular caput height-thickness-index were larger in the carnivorous animals as compared with the herbivorous and omnivorous animals. 3. Mandibular caput-index and mandibular fossa-index were the largest in the omnivorous animals. These seem to indicate that the overall shape of mandibular caput and fossa of the herbivorous and carnivorous animals is slenderer than that of the omnivorous animals. 4. Mandibular caput convex-index (lateral sight) and mandibular fossa concave-index (lateral sight, posterior sight) were the largest in the carnivorous animals. These seem to indicate that postglenoid process of the carnivorous animals have developed better. Mandibular caput convex-index (posterior sight) was the largest in the omnivorous animals. 5. Mandibular joint width-index was the largest in the carnivorous animals. This seems to indicate that mandibular caput of the carnivorous animals has less room to move right and left in mandibular fossa. Mandibular joint thickness-index was largest in the omnivorous animals. 6. Width of mandible-index (1) was the largest in the herbivorous animals. Width of mandible-index (2) was the largest in the omnivorous animals. 7. Angle of mandible was the largest in the carnivorous animals. This seem to indicate that the carnivorous animals have capability to open mouth wide and that the herbivorous and omnivorous animals have less capability. 8. Angle of right and left mandibular caput (superior sight) was the largest in the carnivorous animals. 9. Inclination of mandibular caput was the smallest in the carnivorous animals. This seem to indicate that mandibular caput protruded outside more as compared with the height of articular process.
- 九州歯科学会の論文
- 1983-06-25