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Polymerization shrinkage strain, modulus, and shrinkage stress related to tooth-restoration interfacial debonding in bulk-fill composites
Bulk-fill 복합레진 수복시 치아-수복물 계면 파괴와 관련된 중합수축, 탄성계수, 수축응력

DC Field Value Language
dc.contributor.advisor이인복-
dc.contributor.author김진영-
dc.date.accessioned2017-07-14T05:42:19Z-
dc.date.available2017-07-14T05:42:19Z-
dc.date.issued2015-02-
dc.identifier.other000000025111-
dc.identifier.urihttps://hdl.handle.net/10371/125062-
dc.description학위논문 (박사)-- 서울대학교 대학원 : 치의과학과, 2015. 2. 이인복.-
dc.description.abstractObjectives. The aim of the present study was to measure the polymerization shrinkage, modulus, and shrinkage stress of bulk-fill and conventional composites during polymerization and to investigate the relationship between tooth-composite interfacial debonding and polymerization shrinkage stress of the composites.

Methods. Polymerization shrinkage, dynamic modulus, and shrinkage stress of two non-flowable bulk-fill: SonicFill (SF) and Tetric N-Ceram Bulk-Fill (TNB)
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dc.description.abstracttwo flowable bulk-fill: Filtek Bulk-Fill (FB) and SureFil SDR Flow (SDR)-
dc.description.abstractone non-flowable conventional: Filtek Z250 (Z250)-
dc.description.abstractand one flowable conventional: Filtek Z350 XT Flowable (Z350F) composites were measured using custom-made instruments. Acoustic emission (AE) analysis was performed to evaluate the tooth-composite interfacial debonding during polymerization of the composites in Class 1 cavities on extracted third molars.

Results. Polymerization shrinkage (%) of Z350F (3.53) at 10 min was the highest, followed by FB (3.05), SDR (2.99), TNB (2.22), Z250 (2.09), and SF (2.05). Complex shear modulus (MPa) after 20 s of light-curing was highest in SF (996.2), followed by Z250 (831.8), TNB (723.6), Z350F (553.2), SDR (421.3), and FB (334.8). Polymerization shrinkage stress values (MPa) were: Z350F (3.51), TNB (2.42), Z250 (2.38), SF (2.36), FB (2.24), and SDR (1.68). The numbers of AE events were: Z350F (12.6), TNB (7.0), Z250 (7.0), FB (6.8), SF (6.6), and SDR (6.0). Z350F showed the highest polymerization shrinkage stress and AE event number (p < 0.05). SDR exhibited the lowest polymerization shrinkage stress (p < 0.05). The polymerization shrinkage stress for TNB, Z250, SF, and FB as well as the number of AE events for TNB, Z250, FB, SF, and SDR were not significantly different (p > 0.05).

Conclusions. Composites that exhibited greater polymerization shrinkage stress generated more tooth-composite interfacial debonding. In contrast to similar outcomes among the non-flowable composites (conventional: Z250, bulk-fill: TNB and SF), the flowable bulk-fill composites (FB and SDR) demonstrated lower polymerization shrinkage stress and tooth-composite interfacial debonding than did the flowable conventional composite (Z350F).
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dc.description.tableofcontentsContents

Abstract (in English)
1. Introduction …………………………………………………… 1
2. Materials and Methods …………………………………… 5
3. Results ……………………………………………………… 12
4. Discussion …………………………………………………… 15
5. Conclusions ………………………………………………… 22
6. References …………………………………………………… 23
Table and Figures ……………………………………………… 29
Abstract (in Korean) …………………………………………… 40
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dc.formatapplication/pdf-
dc.format.extent1100724 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 대학원-
dc.subjectAcoustic emission-
dc.subjectBulk-fill composite-
dc.subjectModulus-
dc.subjectShrinkage-
dc.subjectStress-
dc.subject.ddc617-
dc.titlePolymerization shrinkage strain, modulus, and shrinkage stress related to tooth-restoration interfacial debonding in bulk-fill composites-
dc.title.alternativeBulk-fill 복합레진 수복시 치아-수복물 계면 파괴와 관련된 중합수축, 탄성계수, 수축응력-
dc.typeThesis-
dc.contributor.AlternativeAuthorRyan Jin-Young Kim-
dc.description.degreeDoctor-
dc.citation.pages42-
dc.contributor.affiliation치의학대학원 치의과학과-
dc.date.awarded2015-02-
Appears in Collections:
College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dental Science(치의과학과)Theses (Ph.D. / Sc.D._치의과학과)
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