乳歯歯髄切断後の創傷治癒に関する実験的研究
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概要
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The author performed the vital pulpotomy on deciduous teeth using Calvital and Dycal from calcium hydroxide, FR from condensed compound of guaiacol and formaldehyde, and FC process from formocresol and a histological examination was made on healing after pulpotomy on vital pulp of deciduous teeth. The results were as follows : 1. Formation of a necrotic layer directly below the plane of section was extensive with Calvital, FR and FC process, but slight with Dycal. 2. With Calvital, cells with a large nucleus appeared on the third day after operation and calcified tissues were observed in some. Findings of calcified barriers and dentin barrier in the early stage were seen from seven to fourteen days after operation. 3. With Dycal, slight hyalinization and cellular infiltration were observed in the pulp three days postoperatively. From 7 to 14 days, calcified barriers were formed in the plane of section and the inner most layer contained organic matters stained lightly in Eosin. After 35 days, dentin barriers were observed but still incomplete, and odontoblasts also were irregular in construction. 4. With FR, hyalinization and slight inflammatory cellular infiltration were observed in the cases in which demarcation was seen directly below the plane of section. From 7 to 14 days, findings of dentin barriers in the early stage were seen and organic matrics were seen in some of the innermost layers of the barriers. After 35 days, dentin barriers were formed and argrophilic fibers were beginning to be observed. 5. With FC, findings of inflammation in the dental pulp tissue continued as long as 35 days after operation. Although healing of the dental pulp by inflammatory granulation tissues and fibrosis, findings of internal resorption were markedly seen. 6. Internal resorption was observed with FC but not with Calvital, Dycal and FR.
- 九州歯科学会の論文
- 1986-10-25