Bond Strengths of Cements to a Newly Developed Pressable Ceramics
Objectives: The aim of this study was to evaluate the bond strengths of three luting agents to newly developed pressable lithium disilicate glass ceramics after thermocycling. Methods: Three luting agents were used for this study; 1) RelyX Ultimate / Scotchbond Universal Etchant and Scotchbond Universal Adhesive (3M ESPE) 2) Panavia V5 / K-ETCHANT Syringe and Clearfil Ceramic Primer Plus (Kuraray Noritake Dental) 3) G-CEM LinkForce / GC ETCHANT and G-Multi PRIMER (GC)
The surfaces of forty-eight specimens made of a pressable lithium disilicate glass ceramics (Initial LiSi Press, GC) were ground flat with #600-grid SiC paper. Then they were divided into six groups of eight each. Stainless steel rods were bonded to the specimens’ surfaces using one of the three cements. The tensile bond strengths were tested after 24h water storage (37°C) and after thermocycling (5°C - 55°C, 30sec dwell time for 10,000 cycles) using universal testing machine. These specimens were fractured under the tension at a crosshead speed of 1 mm/min, and the maximum loads at the fractures were recorded. Average fracture loads were compared with two-way ANOVA and t-test with Bonferroni correction (p<0.05). Results: The results are presented in the table below. The bond strengths of Panavia V5 and G-Cem LinkForce after 24h and thermocycling were significantly higher than RelyX Ultimate (p<0.05). The bond strengths of G-CEM LinkForce after thermocycling was not significantly different from that before thermocycling (p<0.05). Conclusions: In this study, Panavia V5 and G-Cem LinkForce were useful for the adhesion to a newly developed pressable ceramics.
Division: IADR/PER General Session
Meeting:2018 IADR/PER General Session (London, England) Location: London, England
Year: 2018 Final Presentation ID:1919 Abstract Category|Abstract Category(s):Dental Materials 4: Adhesion
Authors
Otake, Shiho
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Hayashi, Kenichiro
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Nozaki, Kosuke
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Komada, Wataru
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Yoshida, Keiichi
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Miura, Hiroyuki
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Financial Interest Disclosure: NONE
SESSION INFORMATION
Poster Session
Adhesion to Materials Used for Indirect Restorations; Fiber-reinforced Materials
Friday,
07/27/2018
, 11:00AM - 12:15PM
TABLES
Tensile bond strength (MPa) to pressable lithium disilicate glass ceramics N=8 in each group.
Panavia V5
RelyX Ultimate
G-CEM LinkForce
After 24h
17.7±4.2A,a
10.5±1.4B,a,b
15.8±2.2b
After thermocycling
10.9±1.6A,c
0.2±0.4B,c,d
13.7±3.7d
Same large letters in vertical columns and same small letters in horizontal columns indicate significant difference.