根未完成歯の歯髄処置における各種薬剤の効果に関する実験的研究

概要

論文の詳細を見る
A total of 77 puppies was used as materials to utilize their immature teeth with large-sized pulp cavity. The pulp of lower premolar teeth of these animals was amputated in both sides of jaw. We selected, Calvital among medicaments of calcium hydroxide, Dycal, Hydrex and mono-Calcium hydroxide as comparison, and Cavitec among medicaments of eugenol, five kinds in all, and about the effects of those medicaments the healing processes involving repair of cavity shape, further growth of the root and possible change of periodontal tissues were studied by means of radiological and patho-histological methods. Results were summarized as follows. 1. On the 1st day following the vital amputation of pulp, the X-ray showed no sign of opaque at amputated side, but patho-histological findings showed a clear boundary formed between vital and necrotic pulpal tissues as an instance of mono-Calcium hydroxide. 2. On the 3rd day X-ray films showed a thin line of radiopaque at amputated side as examples of Calvital and mono-Calcium hydroxide. This patho-histological showed that there appeared spindle cells on the surface layer of the pulp and that fiber components increased, and this corresponds to characteristics in the beginning of formation of a new dentine barrier. 3. On the 7th day, when I used Calvital and mono-Calcium hydroxide radiopaque, thin lines became thick and clearer, and a formation of the new dentine barrier was observed on this part and odontoblasts appeared. 4. On the 14th day, when I used Calvital, mono-Calcium hydroxide and Dycal, opaque was remarkable and the width and clearness increased. In this period the formation of dentine barrier was observed clearly. When we used Cavitec, radio-opacity was still distinguished and until the 14th day suppurative inflammation remained from amputated side to deep tissue, and the pulp of the root canal was going to suppurate and collapse. 5. After twenty one days, in the cases of Calvital, mono-Calcium hydroxide and Dycal the opaque band was as wide as before, and the dentine barrier became thicker and living pulp was covered with it completely. In the case of Dycal I observed very few formation of necrosis layer on the surface of the pulp just under the amputated part. This was also found in the case after 62 days. In the case of Cavitec the opaque band was not seen, but spindle cells apeared and fibers increased in the pulp just under the amputated part, and the pulp between the middle of the root and root apex was kept normal. In the case of Hydrex radioparency was distinguished, and the pulp showed suppurative inflammation to the middle part of the root. 6. As for formation of the root apex, after 62 days in the cases of Calvital, mono-Calcium hydroxide, Dycal and Cavitec the apical foramen was covered with cellular cement almost completely. In the case of Hydrex suppurative inflammation was kept long and it reached the root apex. In consequence formation of dentine near the root apex was thin, and in spite of addition to cellular cement we could not find any covering on the root apex. 7. In the cases of Calvital, mono-Calcium hydroxide, and Dycal dentine of the wall of root canal grew and the form of the pulp cavity was recovered satisfactorily. In the case of Cavitec it was recovered less satisfactorily, and in case of Hydrex it was hardly observed. As mentioned above I believe that Calvital, mono-Calcium hydro xide, and Dycal can apply to the pulp of immature teeth under development and that they are clinically very useful. As for Cavitec rather severe inflammatory reaction was recognized in a short time experiment, and therefore, seemed very unstable, and, I guess Hydrex is almost impossible to apply.
九州歯科学会の論文
1977-01-31

著者

中村一孝
九州歯科大学大学院歯学研究科:九州歯科大学口腔病理学教室

根未完成歯の歯髄処置における各種薬剤の効果に関する実験的研究

スポンサーリンク

概要

著者

関連論文

スポンサーリンク