口腔颌面部X线检査主要用于观察下列哪些结构的病理改变：

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24670' and id < 2114859 and id<>'2114859' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24670' and id > 2114859 and id<>'2114859' order by id asc limit 5