New fracture toughness test for dental adhesive resin cements

To evaluate fracture toughness of adhesive resin cements, Notchless Triangular Prism Fracture Toughness Test (NTP) was applied and examined whether Adhesive prism and its adhesive gap conditions correspond to the evaluation method of fracture toughness test. Adhesive prism was composed of the adhesi...

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Bibliographic Details
Published inAdhesive Dentistry Vol. 22; no. 2; pp. 87 - 96
Main Authors WATANABE, Yasuhiro, TOMURO, Masayuki, KOMATSU, Shigeki, HATA, Yoshiaki
Format Journal Article
LanguageJapanese
Published Japan Society for Adhesive Dentistry 2004
Subjects
dental adhesive resin cement
fractographical analysis
fracture toughness
K1c
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Summary:To evaluate fracture toughness of adhesive resin cements, Notchless Triangular Prism Fracture Toughness Test (NTP) was applied and examined whether Adhesive prism and its adhesive gap conditions correspond to the evaluation method of fracture toughness test. Adhesive prism was composed of the adhesive material sandwiched between two metal triangular prisms at three kinds of gap (0.5, 1.0, 2.0 mm). Superbond C& B (SB) and Panavia Fluoro Cement (PV) were used as an adhesive material. Fracture phenomenon of adhesive surface was investigated using fractographical analysis, stress-strain curve analysis and maximum fracture strength. Results were as follows. 1. NTP using adhesive prism showed proper fracture toughness values (K1c) of dental adhesive resin cements. 2. The different fracture phenomena were shown: 2.0 mm gap was cohesive fracture and 0.5 mm gap was adhesive fracture. 3. Zero point five mm gap showed the adhesive fracture and its K1c did not show significant difference between SB and PV. 4. There was no significant difference of K1c between PV20 (2.0 mm gap) and PVP (NTP prism made with PV).
ISSN:0913-1655
2185-9566
DOI:10.11297/adhesdent1983.22.87