口腔颌面部在人体占有显要的地位,口腔、鼻腔、副鼻窦、牙齿、扁桃体等均有特殊的解剖结构,其温度、湿度、酸硷度特别适合细菌的生长,有人统计口腔中至少有五十种以上的细菌,虽然其中大多数为常住菌,但在机体情况改变防御机能降低时,达些非致病菌也能致病。颌骨的周围有升颌和降颌肌群,因此产生了不少间隙,在间隙中含有丰富的疏松结缔组 Oral and maxillofacial region in the body occupies an important position, oral, nasal cavity, paranasal sinuses, teeth, tonsils, etc. have special anatomical structure, the temperature, humidity, pH is particularly suitable for the growth of bacteria, some statistics oral at least five More than ten bacteria, although most of them are resident bacteria, can reach as many non-pathogenic bacteria as their body's defenses are reduced. Jaws around the ascending jaw and jaw reduction group, resulting in a lot of gaps in the gap is rich in loose connective group