下列选项中,不属于局部缓释用药治疗牙周炎的优点的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29917' and id < 2426090 and id<>'2426090' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29917' and id > 2426090 and id<>'2426090' order by id asc limit 5