网络 牙沟; 齿沟
- An Evaluation of Clinical Effects on Endosseous Dental Implant Part ──ⅲ. An Observation of the Bacteria in the Subgingival Groove
骨内牙种植体临床效果评价&Ⅲ.龈下细菌定植观察 - The teeth were randomly divided into 3 groups each for 10 teeth: the dental structure around the posts was drilled with bur to produce a groove with depth of 4mm in the first group;
30颗牙随机分为三组，10颗牙不作处理作为对照：10颗牙使用机用钻针在桩周围切割出4mm深的一圈窄沟；