第九章测试1. The basic principles for the treatment of periimplant tissue lesions are （ ）
A:Elimination of peri-implant pockets B:Control infection C:All of the above D:Completely remove plaque E:Stop bone loss
答案:C
2. Which of the following is an important promoter of periimplant inflammation （ ）
3. When implant surgery is performed in the mandibular posterior tooth area, （ ）
A:Crown implant ratio should be greater than 1:1 B:Avoid the chin hole C:Attention should be paid to the bony undercut on the lingual side D:Attention should be paid to avoiding mandibular canal E:The implant should be kept at a certain distance from the adjacent teeth 4. Periodontal treatment is carried out for patients before implant, and the control standards for periodontal infection generally include （ ）
A:PD>5mm at some sites of residual teeth B:Plaque index<20% C:Full mouth BOP (-) D:Residual periodontal pocket depth ≤ 3mm or ≤ 5mm E:Full mouth bleeding on probing (BOP)<25% 5. In general, if there is no effusion or acute inflammation in the maxillary sinus before surgery, small mucosal perforation will not affect the implant, and collagen membrane can also be used to cushion the perforation area. If the perforation is large, the window should be closed first, and then perform implant surgery after 3 months to avoid maxillary sinusitis. （ ）
A:对 B:错
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