Effect of dentin proteoglycans on the bonding properties of dentin / 中华口腔医学杂志
Chinese Journal of Stomatology
; (12): 753-757, 2014.
Article
de Zh
| WPRIM
| ID: wpr-360485
Bibliothèque responsable:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the potential effect of proteoglycan (PG) and glycosaminoglycan (GAG) on the bonding of etch and rinse adhesive to dentin, in order to improve the bonding effect of dentin.</p><p><b>METHODS</b>Forty-two extracted molars were used to obtain standard dentin bonding surface, and the specimens were etched for 15 s with 37% phosphoric acid and divided into three groups using a table of random numbers. Then the three groups undergone different incubating procedures as follow: specimens in chondroitinase ABC (C-ABC) group were incubated with C-ABC at 37 °C for 48 h in vibrator. Specimens in trypsin (TRY) group were incubated with trypsin, and specimens in the control group were incubated with deionized water for 48 h in the oscillators. Then specimens in each group were randomly assigned into two subgroups, A (Adper(TM) Single Bond 2) and B (Prime & Bond NT) (n = 7). The microtensile bond strength (µTBS), fracture mode and bonding interface morphology of the specimens were evaluated via microtensile testing, stereo microscope and field emission scanning electron microscopy (FE-SEM) respectively after specimens being incubated in 37 °C water for 24 h.</p><p><b>RESULTS</b>The immediate µTBS of C-ABC group bonding with adhesive A and B [(32.9±2.5) and (26.8±2.2) MPa] were significantly lower than that of the control group [(40.7±3.3) and (34.6±3.7) MPa] (P < 0.05). While the immediate µTBS of TRY group [(49.0 ± 3.6) and (44.5 ± 3.0) MPa] were significantly higher than that of the control group(P < 0.05).</p><p><b>CONCLUSIONS</b>Dentin PG participates in the dentin bonding process. Removal of PG increased the immediate µTBS of dentin and total etching adhesives, while removal of GAG decreased the immediate µTBS.</p>
Texte intégral:
1
Indice:
WPRIM
Sujet Principal:
Pharmacologie
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Acides phosphoriques
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Poly(acides méthacryliques)
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Protéoglycanes
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Résistance à la traction
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Mordançage à l'acide
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Trypsine
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Répartition aléatoire
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Chimie
/
Collage dentaire
Type d'étude:
Clinical_trials
Limites du sujet:
Humans
langue:
Zh
Texte intégral:
Chinese Journal of Stomatology
Année:
2014
Type:
Article