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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

Winter 2002
Volume 4 , Issue 4



Pages: 309-315
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Effects of Different Types of Temporary Cements on the Tensile Strength and Marginal Adaptation of Crowns on Implants

Akashi, Ana Eliza/Francischone, Carlos Eduardo/Tokutsune, Edson/da Silva, Walter

The aim of this study was to evaluate the influence of four different types of temporary cements, Tempbond (Kerr), Tempbond NE (Kerr), Improv (Sterioss), and Dycal (Dentsply/Caulk), on the marginal adaptation and tensile strength of prosthetic specimens cemented on replicas of CeraOne abutments. Four test groups were formed: Group 1 (G-1), Tempbond (Kerr); Group 2 (G-2), Tempbond NE (Kerr); Group 3 (G-3), Improv (Sterioss); Group 4 (G-4), Dycal (Dentsply/Caulk). For the specimens, gold cylinders (DCB 160, Nobel Biocare) adapted to stainless steel replicas of CeraOne abutments (Nobel Biocare) were utilized. The replicas on a stainless steel base were made in a special machine for implant components. The cement thicknesses for each luting agent were measured using a Measurement Comparative Microscope (Mitutoyo). The readings obtained before cementation were used as the controls (G-0). Following each group’s cementation, the specimens were submitted to tensile strength tests with a Universal Testing Machine (Kratus). The results of the marginal adaptation test as reflected by cement thicknesses were: G-0 = 11.7 Ám, G-1 = 35.7 Ám (▒ 8.8), G-2 = 41.7 Ám (▒ 9.0), G-3 = 32.6 Ám (▒ 9.7) and G-4 = 38.2 Ám (▒ 6.7). The tensile strength tests yielded the following values: G-1 = 58.5 N (▒ 14.8), G-2 = 51 N (▒ 8.2), G-3 = 61.8 N (▒ 17.1) and G-4 = 71.8 N (▒ 9.3). The four temporary cements tested all provided similar marginal adaptation. G-4 (Dycal) showed a higher tensile strength than G-2 (Tempbond NE).

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