结果1 题目9 The diagram shows the four types of human tooth.12340L incisor canine premolar molar Which teeth are used for grinding food? C A 1 and 2 B 2 and 3 C 3 and 4 D 4 and 1 相关知识点: 试题来源: 解析 C 反馈 收藏
So you need to be diligent about proper canine dental care. In fact, brushing your Schnauzer's teeth is one of the most important things you can do to extend his life. Your Miniature Schnauzer will lose his baby puppy teeth around 4 to 6 months of age. At that time the adult dog or...
The second reason forretention of deciduous teeth is that the eruption direction of the permanentteeth is abnormal, or the eruption is insufficient, which results in theabsence of absorption or absorption of the root of the deciduous tooth.Generally believe that if the baby calcium deficiency, or ...
If a primary tooth loss has occurred, you should go to the dentist and see if you want to wear a space maintainer. 3. Permanent molar tooth decay Baby teeth during milk molar caries disease easily, because of the coexistence of deciduous teeth and permanent teeth, as the large volume, ...