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Titolo:
Effect of intrapulpal pressure simulation in vitro on shear bond strengthsand hybrid layer formation
Autore:
Pioch, T; Staehle, HJ; Schneider, H; Duschner, H; Dorfer, CE;
Indirizzi:
Univ Heidelberg, Dept Conservat Dent & Periodontol, Sch Dent, D-6900 Heidelberg, Germany Univ Heidelberg Heidelberg Germany D-6900 nt, D-6900 Heidelberg, Germany Univ Leipzig, Dept Restorat Dent, D-7010 Leipzig, Germany Univ Leipzig Leipzig Germany D-7010 storat Dent, D-7010 Leipzig, Germany Univ Mainz, Fac Med, Dept Appl Struct & Microanal, D-6500 Mainz, Germany Univ Mainz Mainz Germany D-6500 truct & Microanal, D-6500 Mainz, Germany
Titolo Testata:
AMERICAN JOURNAL OF DENTISTRY
fascicolo: 5, volume: 14, anno: 2001,
pagine: 319 - 323
SICI:
0894-8275(200110)14:5<319:EOIPSI>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
IN-VITRO; DENTIN; ULTRASTRUCTURE; PERMEABILITY; ADHESIVES; SYSTEMS; TEETH; VIVO;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Pioch, T Univ Heidelberg, Dept Restorat Dent, Neuenheimer Feld 400, D-69120 Heidelberg, Germany Univ Heidelberg Neuenheimer Feld 400 Heidelberg Germany D-69120
Citazione:
T. Pioch et al., "Effect of intrapulpal pressure simulation in vitro on shear bond strengthsand hybrid layer formation", AM J DENT, 14(5), 2001, pp. 319-323

Abstract

Purpose: To test the hypothesis that simulation of an intrapulpal pressureduring the application of dentin bonding systems influences hybrid layer formation in vitro. Materials and Methods: 180 teeth and three different bonding agents were used for shear bond strength measurements and for confocallaser scanning microscopy studies on the dentin-composite interface. The bonding agents (30 teeth each material) were applied without (90 teeth, Group A) and with intrapulpal pressure simulation of 34 cm H2O with water (90 teeth, Group B). 45 specimens from each group were sheared in a testing machine, and 45 teeth from each group were used for CLSM studies after labelingthe primer components of the bonding agents with a fluorescent dye. Results: After simulation of pulpal pressure the bond strengths decreased significantly in all groups (Syntac [without/with]: 16.0 +/- 4.5/8.0 +/- 3.7, P = 0.001; Gluma: 13.3 +/- 4.6/8.4 +/- 4.4, P = 0.008; Prime & Bond NT: 14.8 +/- 5.8/8.7 +/- 5.7, P = 0.007; n = 15 each; U-tests). There were no significant differences between the hybrid layer thickness without/with simulation of pulpal pressure (Syntac: 3.6 +/- 0.6/4.1 +/- 1.2, P = 0.35; Gluma: 3.5 +/- 0.6/3.7 +/- 0.9, P = 0.49; Prime & Bond NT: 3.5 +/- 0.9/3.8 +/- 0.8, P =0.44; n = 15 each; U-tests). In the case of simulation of an intrapulpal pressure, CLSM examination revealed a distinctly shallower penetration of the adhesives into dentin compared to the samples treated without intrapulpalpressure.

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Documento generato il 21/09/18 alle ore 08:34:20