Study on Rehardening of Demineralized Dentin with Pulp-capping Agents Using a New Hardness Determination System

• Material Type: 博士論文
• Title: Study on Rehardening of Demineralized Dentin with Pulp-capping Agents Using a New Hardness Determination System
• Author/Editor: 松田, 有之
• Author Heading: 松田, 有之
• Publication, Distribution, etc.: The Japanese Society of Conservative Dentistry
• Alternative Title: 新規Knoop硬さ測定システムによる覆髄剤の有効性の検討
• Degree grantor/type: 大阪歯科大学
• Date Granted: 2014-03-07
• Dissertation Number: 甲第730号
• Degree Type: 博士（歯学）
• Text Language Code: eng
• Subject Heading: Knoop硬さ; 覆髄剤; 再石灰化; Knoop hardness; pulp-capping agent; remineralization
• Target Audience: 一般
• Note (General): Purpose: We measured the hardness of demineralized dentin over time using the Cariotester to determine the effectiveness of several types of pulp-capping agent for IPC.Methods: Extracted human molars were used to prepare dentin samples with a diameter of 10 mm and thickness of 2 mm. Sound dentin samples were immersed in lactic acid solution and were regarded as demineralized when the value obtained using the Cariotester was approximately 20 KNH. HY-Bond Temporary Cement Soft (Shofu), Neodyne-α (Neo Dental Chemical Products), Dycal (Dentsply), and Calcipex Plain II (Nippon Shika Yakuhin) with a 60% calcium hydroxide mixture were used as the pulp-capping agents in the present study. Each pulp-capping agent was applied to the surface of demineralized dentin and covered with base cement. After the base cement solidified, pulp-capped dentin samples and controls were divided into two groups: those placed in a container with 100% humidity and those immersed in remineralization solution, and stored at 37°C in a thermostatic chamber for 1 and 3 months. The hardness of the capping agent-applied region was then measured. Data were analyzed using a one-way analysis of variance and Tukeys test (α=0.05). Pulp-capping agent-applied surfaces were also observed under SEM.Results: The hardness of demineralized dentin increased with the application of Dycal, Calcipex Plain II, and the 60% calcium hydroxide mixture, and mineralized substance-like aggregates were deposited on the surface of and between collagen fibrils. It was suggested that the remineralization of demineralized dentin depended on the calcium hydroxide concentration contained in a pulp-capping agent.Conclusion: The hardness of demineralized dentin increased and remineralization features were noted following the application of a pulp-capping agent containing over 27% calcium hydroxide.; 2013
• Access Restrictions: インターネット公開
• Rights (production): CC BY-NC-ND
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 大阪歯科大学 : 大阪歯科大学学術リポジトリ

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