问题 问答题 简答题

根周病有哪些?有何X线表现?

答案

参考答案:

根周病系指牙髓炎侵入齿根,引起根尖周围组织的疾病。

(1)根周炎:可见根周间隙增宽、模糊、不连续或中断。

(2)根周脓肿:根周牙槽骨质破坏,形成边缘模糊的透亮区。

(3)根周肉芽肿:根周可见圆形或卵圆形边界清楚的小透亮区,无硬化带。

(4)根周囊肿:根周可见边缘光滑锐利的透亮区,可有硬化圈,伴残根牙、龋洞或齿根骨质吸收。

(5)根周致密骨炎:根尖周围骨质增生,密度增高,小梁增粗,牙髓腔狭窄或闭塞。

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It’s only after three weeks into a new job that I made a serious mistake. My boss called it “extremely embarrassing” in a company-wide e-mail — which,    31  , he wrote because he felt he needed to explain that what I did was something    32  in the company should ever do.
I wish I   33   give a good excuse for what I did. At the very least, I wish I could explain it somehow —    34  it on youth, inexperience or ignorance. Unfortunately, I’m    35  , experienced and I know better.
   36  I work with some very kind and compassionate(富于同情心的) people. For the past couple of days many of them have taken time to   37  by my desk and offer comfort, encouragement and support. Some have shared with me similar    38  they have made. Evidently I’m not the only “    39   ” person here.
One of the exchanges I had this week was with Lois, the much-honored, much-respected professional who    40  the desk right next to mine. Lois was completely    41  about her work, and to be honest I was a little nervous about how she would   42  to such an extremely embarrassing incident.
As I expected, Lois didn’t pass over the   43   when she saw me the next day. She mentioned it directly,   44  with empathetic consideration. She listened to my   45  . Just as I was ready to express my regrets, she brought my self-pity partly to a(n)   46  .
“It happened”, she said, “There’s nothing you can do to    47  that. It happened. But it’s over now. It’s   48  . It’s in the past. You need to let it go, and move on.” And with that she returned her   49  to her work, as if to say, “We’re done here.”
I beat myself up for weeks. At such times I need to remember those   50  words: It’s over. It’s done. Let it go. And mostly, move on.
小题1:
A.by the wayB.in the wayC.on the wayD.to the way
小题2:
A.someone B.anyoneC.no oneD.the one
小题3:
A.shouldB.mightC.will D.could
小题4:
A.fix B.blameC.relyD.put
小题5:
A.outgoingB.oldC.cheerfulD.energetic
小题6:
A.ThankfullyB.NaturallyC.GenerallyD.Hopefully
小题7:
A.workB.stop C.watchD.sit
小题8:
A.decisionsB.troubles C.attemptsD.mistakes
小题9:
A.annoyingB.confusingC.embarrassingD.puzzling
小题10:
A.repairsB.wantsC.worksD.occupies
小题11:
A.madB.seriousC.curiousD.hopeful
小题12:
A.reactB.agreeC.turnD.object
小题13:
A.issueB.outcomeC.criterionD.message
小题14:
A.forB.thereforeC. but D.otherwise
小题15:
A.challengeB.imaginationC.conclusionD.explanation
小题16:
A.orderB.keyC.endD.process
小题17:
A.forget B.ruin C.preventD.change
小题18:
A.broken B.done C.lostD.kept
小题19:
A.attentionB.skillC.patienceD.interest
小题20:
A.sweetB.pleasant C.meaningfulD.colorful