口腔变形链球菌是龋病的主要致病菌，血链球菌为牙周有益菌。
Oral Streptococcus mutans is an etiologic agent of dental caries and Streptococcus sangius is in favor of periodontal tissues.
有人认为正如一句古话，自然界充斥着腥牙血爪。
One thinks of nature as "red in tooth and claw," as the old saying goes.
结果69例慢性肾衰长期血透的病人随着血透时间的延长，牙槽骨和牙根的损害也越严重。
Results Lesions of teeth root tips and alveolar bone loss in 69 cases of chronic renal failure with dialysis progressively destroy with long time of dialysis.
结果69例慢性肾衰长期血透的病人随着血透时间的延长，牙槽骨和牙根的损害也越严重。
Results Lesions of teeth root tips and alveolar bone loss in 69 cases of chronic renal failure with dialysis progressively destroy with long time of dialysis.
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