根管充填剤（ヨードホルム・水酸化カルシウム製剤）のイヌ歯牙歯髄保存効果に関する研究　　歯髄血流量を指標とする

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タイトル別名
  • Studies on the conservative effects of material of root canal filling (calcium hydroxide added iodoform) on dog's tooth pulp. By observation of blood flow volum in the dental pulp.
  • コンカン ジュウテンザイ ヨードホルム スイサンカ カルシウム セイザイ ノ
  • By observation of blood flow volum in the dental pulp
  • 歯髄血流量を指標とする

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In a previous study, the author confirmed the preservative effect of Calvital through the observation of the blood flow in the dental pulp. In this study, the action of Vitapex (V. drug, hydroxide to which iodoform is added), a root canal filling material which is similar to Calvital, is examined. Dentists usually use V. drug after pulling out the dental pulp in order to plug the cavity. For the purpose of studying the effectiveness of the preservative effect of V. drug, the author measured the blood flow in the dental pulp of the canine teeth of dogs in vivo by the hydrogen gas clearance method after making a small canal reaching the pulp cavity and plugging it with V. drug. The measurement was carried out for thirty weeks at two week intervals.<br>1. The blood flow is measurable for a long term relative to control, from 14 weeks to 30 weeks or more even in the exposed dental pulp when the pulp has been treated with V. drug. In 10 of 14 cases of untreated canine teeth it was possible to measure the blood flow in dental pulp for from two to four weeks. In three of the remaining four cases the respective periods of measurement were 6 weeks, 22 weeks and 28 weeks. In the final case, the blood flow was measurable for more than 28 weeks.<br>2. The dental pulp where measurable blood flow is observed owing to the V. drug treatment clearly shows in the field of the microscope the tissues maintaining their functions, that is, the author can clearly distinguish that it is vital pulp. In contrast, the tissue of the dental pulp which has no measurable blood flood does not maintain the form of tissue and it can be definitely determined that the dental pulp is dead.<br>3. It is important for maintaining the normal function of dental pulp to keep a certain amount of blood flow volume. It is considered that V. drug is effective in maintaining this flow in the vital pulp.<br>4. It is clearly recognizable that blood flow is histologically maintained in the examined pulp which has blood flow measurable by the hydrogen gas clearancee method. If blood flow in the dental pulp is unmeasurable by this method, the blood vessels in the dental pulp can't be recognized histologically. It is apparent from this agreement that the hydrogen gas clearance method is useful for observing the movement of the local blood flow.

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