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Investigation of the Bonding Strength of the AD Bonding System
Denis Vojvodić
; Klinički zavod za stomatološku protetiku KB "Dubrava", Zagreb, Hrvatska
Vjekoslav Jerolimov
; Klinički zavod za stomatološku protetiku KB "Dubrava", Zagreb, Hrvatska
Asja Čelebić
; Zavod za mobilnu protetiku Stomatološkog fakulteta Sveučilišta u Zagrebu
Janez Indof
; Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu, Zagreb, Hrvatska
Adnan Ćatović
; Zavod za fiksnu protetiku, Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Šubreta Hustić
; Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
An increase the marginal gap between the metal surface and polymer veneer could lead to its detachment and/or egsogene discoloration as a consequence of detritus food remaining in the newly formed gap. The causes of marginal gap formation are polymerization contraction, different coefficients of thermal expansion and different coefficients of volume expansion in water. Increase of the marginal gap should be prevented by application of a modern bonding system, thus also causing reinforcement of the bond strength between the polymer veneer and the metal surface. The aim of this study was to determine bond strengths obtained after application of the AD bonding system on two dental alloys (Ag-Pd, Co- -Cr) and to compare them with the results of a control group simulating common procedure in a dental laboratory. Sixty specimens were tested with shear test after polymerization and ageing treatments (immersion in water temperature 37 °C and thermo- cy cling). The AD bonding system improved bond strength values on Ag-Pd alloy. However, the results obtained on Co-Cr alloy were even lower than those- in the control group.
Ključne riječi
bonding strength; bonding system; marginal gap
Hrčak ID:
98674
URI
Datum izdavanja:
15.12.1996.
Posjeta: 939 *