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博士論文
国立国会図書館館内限定公開
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Study on Polymerization Contraction Stress of Bulk-fill Resin Composites
- 国立国会図書館永続的識別子
- info:ndljp/pid/12071398
国立国会図書館での利用に関する注記
資料に関する注記
一般注記:
- Purpose: While incremental filling is recommended for deep cavities when a light-cured composite resin (CR) is used, because of issues such as polymer...
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デジタル
- 資料種別
- 博士論文
- 著者・編者
- 岩﨑, 和恵
- 著者標目
- 出版年月日等
- 2021-03-05
- 出版年(W3CDTF)
- 2021-03-05
- 並列タイトル等
- バルクフィルコンポジットレジンの重合収縮応力に関する研究
- 授与機関名
- 大阪歯科大学
- 授与年月日
- 2021-03-05
- 授与年月日(W3CDTF)
- 2021-03-05
- 報告番号
- 甲第899号
- 学位
- 博士(歯学)
- 博論授与番号
- 甲第899号
- 本文の言語コード
- eng
- 対象利用者
- 一般
- 一般注記
- Purpose: While incremental filling is recommended for deep cavities when a light-cured composite resin (CR) is used, because of issues such as polymerization contraction stress and irradiation depth, bulk-fill CRs, which can be filled in large cavities at once, have been developed and used in clinical application. This study examined the effects of the polymerization contraction stress of bulk-fill CRs in high C-factor cavities by conducting visual evaluation using polycrystallized glass blocks, shear bond strength tests on bovine dentin, and measurement of the residual volume after curing.Materials and methods: Bulk Base Hard (BH) and Beautifil Bulk Flow (BF) were used as bulk-fill CRs, and Gracefil Flow (GF) as a conventional CR. As bonding systems, Clearfil Mega Bond2 (MB) and Clearfil Universal Bond Quick ER (ER) were used. Bioram-M was used as the polycrystallized glass block. The groups filled with each CR after bonding treatment with MB were designated as the MBH Group, MBF Group, and MGF Group, and the groups filled with each CR after bonding treatment with ER as the EBH Group, EBF Group, and EGF Group. A cylindrical cavity of 4.5 mm diameter and 4.0 mm depth in Bioram-M was formed, the cavity was repaired, and the state of gap and crack generation was classified and scored. Furthermore, a flat dentin surface on a bovine front tooth was prepared, repaired, and then the tensile-shearing strength was measured immediately after bonding.A rubber ring jig with 4.5 mm diameter and 4.0 mm height was prepared and each CR was filled in a darkroom to prepare cylindrical sample. The specimen was soaked in acetone immediately after curing, and the unpolymerized parts of the CR were removed. The residual volume of each specimen was measured after removing the unpolymerized CR. Results: As a result of visual evaluation, a significant difference in the state of gap and crack generation was observed in the MBH and MBF Groups compared to the MGF Group, and in the EBH and EBF Groups compared to the EGF Group (p< 0.05). The MGF and EGF Groups showed gaps at the cavity floor. In addition, the bond strength of the MBF Group was significantly higher than those of the MBH and MGF Groups (p< 0.05). The bond strengths of the EBF Group and EGF Group were significantly higher than that of the EBH Group (p< 0.05). Although the residual volume of BH and BF were significantly larger than those of GF, there was no significant difference between BH and BF (p< 0.05).Conclusion: The results indicated that care is needed during the filling operation of bulk filling with bulk-fill CRs, as the problems caused by polymerization contraction stress are not completely eliminated in high C-factor cavities, even though it is effective for the bonding of deep cavities.2020年度
- 国立国会図書館永続的識別子
- info:ndljp/pid/12071398
- コレクション(共通)
- コレクション(障害者向け資料:レベル1)
- コレクション(個別)
- 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
- 収集根拠
- 博士論文(自動収集)
- 受理日(W3CDTF)
- 2022-02-06T04:33:19+09:00
- 作成日(W3CDTF)
- 2021-04-23
- 記録形式(IMT)
- application/pdf
- オンライン閲覧公開範囲
- 国立国会図書館内限定公開
- デジタル化資料送信
- 図書館・個人送信対象外
- 遠隔複写可否(NDL)
- 可
- 連携機関・データベース
- 国立国会図書館 : 国立国会図書館デジタルコレクション