The effect of hemostatic agents on the retention strength of zirconia crowns luted to dentin abutments
Materials, ISSN: 1996-1944, Vol: 12, Issue: 6
2019
- 4Citations
- 17Captures
- 1Mentions
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- Citations4
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- CrossRef2
- Captures17
- Readers17
- 17
- Mentions1
- Blog Mentions1
- Blog1
Article Description
The purpose of this study was to investigate whether hemostatic agents (HA) show an effect on the retention strength (RS) of zirconia crowns luted to dentin abutments after cleaning with an air/water spray. Human molars (N = 60/n = 12) were prepared and zirconia crowns were milled. Prior to luting (Scotchbond Universal/RelyX Ultimate), molars were pretreated using HA: i. 25% AlCl (VSC), ii. 20% Fe(SO) (VS), iii. 15.5% Fe(SO) (AS), iv. 12.7% iron ion solution (ASX) and v. no pretreatment (control). Mastication simulation and pull-out tests were performed. Failure types were defined: cohesive 1-tooth root; cohesive 2-tooth crown; adhesive 1-cement on tooth; adhesive 2-cement on tooth and crown; mixed-adhesive/cohesive. Data were analyzed using 1-way ANOVA, post-hoc Scheffé, Pearson's chi-square-test and Ciba-Geigy table (p = 0.05). No RS differences between the tested groups were observed (p = 0.200). ASX fractured more cohesive 2 than the control group. VSC showed more cohesive 2 than adhesive 1 fractures. VS showed more adhesive 2 than mixed fractures. AS showed more cohesive 2 than adhesive 1 and more adhesive 2 than mixed fractures. ASX showed predominantly cohesive 2 fractures. RS was not affected when HA were cleaned off by 30 s of air/water spray prior to luting. HA still seem to weaken the dentin abutment, making it prone to cohesive fractures.
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