Retentive Strengths for Prefabricated Primary Molar Zirconia Crowns Using Five Different Cements

Luz Adriana Rosato ； 陳容維(Jung-Wei Chen) ； Clyde Roggenkamp ； Jui-Min Su

《臺灣兒童牙醫學雜誌》 18卷4期 (2018/12) Pp. 127-135

https://doi.org/10.6319/TJPD.201812_18(4).0001

摘要

Purpose: To assess retentive strengths of 5 commercially available cements with prefabricated primary molar zirconia crowns. Methods: Seventy five prefabricated primary molar zirconia crowns were cemented on extracted human teeth using 5 different cements (Ketac Cem Maxicap, FujiCEM 2, BioCem, RelyX Unicem 2 and RelyX Luting Plus Automix N=15 per group). Following thermocycling, 5000 cycles from 5° to 55℃, crown retentive strengths data were collected and statistically analyzed using one-way ANOVA with LSD post hoc test (P ＜0.05). Results: Mean retentive strengths are: Ketac Cem 482.4N±87, FujiCEM 2 354.9N±121, BioCem 462.7N±138, RelyX Unicem 2 409.0N±171 and RelyX Luting 233.5N±170. The retentive strengths were statistically significant (P=0.014) among the 5 groups, but not the cement failure rankings (P=0.47). Conclusions: There is a significant difference in the retentive strengths for cementing prefabricated primary molar zirconia crowns among the 5 different cements. Ketac Cem has the highest retention force, followed by BioCem, RelyX Unicem, Fuji CEM II, and RelyX Luting. The majority of cement failures occurred between the cement and the tooth.

關鍵字

Prefabricated ； zirconia crowns ； retention ； cement