Poliklinik für Zahnärztliche Prothetik

Direktor: Prof. Dr. Gerhard Handel


Marginal adaptation of Ceramic Inlays Using Different Types of Cements

ROSENTRITT M*, BEHR M, LANG R, HANDEL G.

(Department of Prosthetic Dentistry, University of Regensburg, Germany)

Objectives: The aim of this in-vitro study was to determine the marginal adaptation of ceramic inlays to dentin and enamel using different cements and corresponding bonding systems.

Methods: 40 all-ceramic inlays (IPS Empress1, Ivoclar-Vivadent, FL) were inserted in MOD- Class 2 cavities with cervical margins located both in A) dentin and in B) enamel. Four groups of cements were tested: two resin cements: Variolink II/Syntac Classic (Ivoclar-Vivadent) and Panavia F/ED (Kuraray, J), one resin modified glassionomer: Fuji Plus/Conditioner (GC, J), one compomer: Dyract Cem Plus/Prime&Bond NT/NRC (Dentsply, G) and an experimental group without primer: exp. Material (3M Espe, G). The approximal margins were evaluated after thermal cycling and mechanical loading (TCML: 6000x5/55C, H20, 2min. each cycle, 1.2*106x50N). Marginal adaptation was determined using scanning electron microscopy before and after TCML. Microleakage was assessed at the cervical margins by a dye penetration test after TCML (0.5% fuchsine solution, 16h). Statistics: Mann-Whitney-test (p 0.05).

Results:

Before/after TCML

Margin:

Variolink II

Dyract Cem

Panavia F

Fuji Plus

Exper. Mat.

Perfect margin [%]

Enamel

100.0/97.0

21.0/11.5

97.3/100.0

82.7/84.4

98.1/98.5

 

Dentin

100.0/93.5

14.7/9.8

98.5/97.3

87.0/75.8

100.0/99.5

Microleakage [%]

Enamel

10.2

24.1

0

12.0

3.5

 

Dentin

14.3

100

5.2

18.5

12.0

Conclusions:

The experimental cement without bonding showed comparable good results as the resin cements. For the modified glassionomer and the compomer remarkably higher dye penetration and less perfect margin were found. For Dyract Cem curing problems were detected. The experimental cement without any bonding may be an alternative to commercial luting materials.

 

 


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