Effects of Rehydration on Dentin Strengthened by Heating or UV Irradiation

被引：12

作者：

Hayashi, M. ^{[1
]}

Okamura, K. ^{[1
]}

Koychev, E. V. ^{[1
]}

Furuya, Y. ^{[1
]}

Sugeta, A. ^{[2
]}

Ota, T. ^{[3
]}

Ebisu, S. ^{[1
]}

机构：

[1] Osaka Univ, Dept Restorat Dent & Endodontol, Grad Sch Dent, Suita, Osaka 5650871, Japan

[2] Hiroshima Univ, Grad Sch Engn, Dept Mech Syst Engn, Hiroshima, Japan

[3] Nanophoton, Osaka, Japan

来源：

JOURNAL OF DENTAL RESEARCH | 2010年 / 89卷 / 02期

基金：

日本学术振兴会;

关键词：

dentin; rehydration; UV; Raman spectra; ULTIMATE TENSILE-STRENGTH; ULTRAVIOLET-IRRADIATION; MECHANICAL-PROPERTIES; CROSS-LINKING; FRACTURE-RESISTANCE; COLLAGEN-FIBERS; BONE; WATER; AGE;

D O I：

10.1177/0022034509354564

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

Type I collagen, the major organic component of human dentin, plays an important role in regulating the mechanical strength of dentin. Collagen in dentin can be strengthened by heating. We hypothesized that UV irradiation could produce similar strengthening effects and might maintain the strength of dentin after rehydration. Beam-shaped dentin specimens from the crowns of human third molars were subjected to flexural testing. Flexural strengths were two and three times greater than those in the control group after 5 minutes' UV irradiation and heating to 140 C, respectively. After 30 days of rehydration, the heated specimens reverted to their original strength, whereas the UV specimens were 69% stronger than the original. Raman spectra of dental collagen were unchanged after heating, whereas several peaks, including a C-C bond in a proline ring, were amplified by UV irradiation. It is concluded that dentin strengthened by UV irradiation retains strength after rehydration because of chemical changes in collagen.

引用

页码：154 / 158

页数：5

共 22 条

[1] Mechanical properties of adult vertebral cancellous bone: Correlation with collagen intermolecular cross-links [J].

Banse, X ;

Sims, TJ ;

Bailey, AJ .

JOURNAL OF BONE AND MINERAL RESEARCH, 2002, 17 (09) :1621-1628

[2] Changes in stiffness of demineralized dentin following application of collagen crosslinkers [J].

Bedran-Russo, Ana Karina B. ;

Pashley, David H. ;

Agee, Kelli ;

Drummond, James L. ;

Miescke, Klaus J. .

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS, 2008, 86B (02) :330-334

[3]

BURNETT GEORGE W., 1958, JOUR DENTAL RES, V37, P581, DOI 10.1177/00220345580370040301

[4] EFFECT OF ULTRAVIOLET IRRADIATION ON SOLUBLE COLLAGEN [J].

COOPER, DR ;

DAVIDSON, RJ .

BIOCHEMICAL JOURNAL, 1965, 97 (01) :139-&

[5] EFFECT OF ULTRAVIOLET IRRADIATION ON COLLAGEN-FOLD FORMATION [J].

COOPER, DR ;

DAVIDSON, RJ .

BIOCHEMICAL JOURNAL, 1966, 98 (03) :655-&

[6] RAMAN-SCATTERING OF COLLAGEN, GELATIN, AND ELASTIN [J].

FRUSHOUR, BG ;

KOENIG, JL .

BIOPOLYMERS, 1975, 14 (02) :379-391

[7] Heat treatment strengthens human dentin [J].

Hayashi, M. ;

Koychev, E. V. ;

Okamura, K. ;

Sugeta, A. ;

Hongo, C. ;

Okuyama, K. ;

Ebisu, S. .

JOURNAL OF DENTAL RESEARCH, 2008, 87 (08) :762-766

[8] Effect of depth and tubule direction on ultimate tensile strength of human coronal dentin [J].

Inoue, S ;

Pereira, PNR ;

Kawamoto, C ;

Nakajima, M ;

Koshiro, K ;

Tagami, J ;

Carvalho, RM ;

Pashley, DH ;

Sano, H .

DENTAL MATERIALS JOURNAL, 2003, 22 (01) :39-47

[9] THE EFFECTS OF DEHYDRATION AND REHYDRATION ON SOME MECHANICAL-PROPERTIES OF HUMAN DENTIN [J].

JAMESON, MW ;

HOOD, JAA ;

TIDMARSH, BG .

JOURNAL OF BIOMECHANICS, 1993, 26 (09) :1055-1065

[10] Influence of different chemical cross-linking treatments on the properties of bovine pericardium and collagen [J].

Jorge-Herrero, E ;

Fernández, P ;

Turnay, J ;

Olmo, N ;

Calero, P ;

García, R ;

Freile, I ;

Castillo-Olivares, JL .

BIOMATERIALS, 1999, 20 (06) :539-545

← 1 2 3 →