HOME - Clinical cases - Digital Dentistry
 
 
17 June 2020

How to lute chairside CAD-CAM ceramics

Co-authors: A. Comba, F. Del Bianco

Lorenzo Breschi


In recent years the use of chairside CAD/CAM ceramics restorations has rapidly increased. The choice of materials includes zirconia-reinforced lithium silicate (VS), infiltrated ceramic with polymers (VE) and nanoceramic resin (GC). Considering the great variety of cementation protocols and luting cements the bond strength of different chairside computer-aided design and computer-aided manufacturing (CAD-CAM) restorative materials to dentin with different resin cements needs to be assayed.            
The study conducted by Seda Ustun et al. tested the in vitro bond strength of different CAD/CAM ceramics materials luted with different resin cement immediately and after thermal aging.  

Materials and Methods
 The occlusal surfaces of 63 molar teeth of similar size were flattened, and rectangular specimens of 2.5 mm in thickness (n=21 per group)  were obtained from zirconia-reinforced lithium disilicate (Vita Suprinity-VS), polymer infiltrated ceramic (Vita Enamic-VE), and resin nanoceramic (GC Cerasmart-GC). The specimens were divided into three subgroups (n=7) and cemented using total etch (TE), self-etch (SE), and self-adhesive (SA) cement systems. The teeth were sectioned vertically into 2 equal parts and half of the specimens were subjected to thermal aging with 5000 cycles. The shear bond strength test of all the specimens was measured. Fractured ceramic surfaces were examined by scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX) analysis. The Shapiro-Wilk test, 3-way analysis of variance (ANOVA), and Fisher Least Significant Difference (LSD) tests were used to analyze the shear bond strength test data (a=.05).

Results
 From the collected data, the authors showed that the highest bond strength value was found for the group non-thermal aged VS-TE and the lowest for the group thermal aged VE-TE. Significant interaction was found between TE and SE cemented ceramics (P<.001). For specimens cemented with the SA system, significant interaction was found among ceramics with thermal aged specimens (P<.001). Thermal aging significantly decreased the mean bond strength (P<.05).  

Conclusions
 Seda Ustun et al. concluded that, based on the findings of their in vitro study:
 1. TE or SA systems might be recommended for VS ceramic restorations.
 2. Cementation of VE and GC ceramic restorations with SE systems could be recommended.
 3. The thermal aging process significantly reduced the bond strength values of all ceramic materials, regardless of the cementation systems. Total etch and self-adhesive cementation systems can be recommended for Vita Suprinity restorations. To cement GC Cerasmart and Vita Enamic restorations, self-etch cementation systems may be more advantageous.


  For additional information:  Effect of different cement systems and aging on the bond strength of chairside CAD-CAM ceramics. 

Related articles

Co-authors: Roberto Spreafico, Franco Brenna, Cesare Robello, Massimo Nuvina, Massimo Mario Gagliani

The aim of this study is to pro- pose an update on ceramics for partial and total indirect reconstructions performed with CAD/ CAM. MATERIALS AND METHODS Through a careful study of...


Read more

USA     18 June 2021 - 30 November 0001

ADHA Annual Conference 2021

June 18-20, 2021. Phoenix, Arizona.

As the largest event dedicated to dental hygienists, this meeting is just for you! 


The treatment of palatal displaced canines (PDCs) is one of the most challenging treatments in orthodontic dental care. The invasive and long-lasting treatment often requires interceptive extraction...


Recorded webinar - Oral Surgery - Prof. Testori

Sinus elevation surgery has become a sought-after part of implant dentistry. Procedures have evolved over the last 25 years to a point where sinus grafting surgery is considered one of the most...


Dental billing platform company, Vyne Dental, has acquired patient communications company, Operability, LLC. The acquisition also includes Operability’s OperaDDS platform, which launched in 2011 to...


Authors: Monica Giani, Umberto Pagliaro, Lorenzo Franchi, Roberto Rotundo, Michele Nieri

Purpose. The aim of this randomized clinical trial with blinded examiner was to compare the efficacy of four different methods of enhancing oral hygiene motivation in: (i) reducing the full-mouth...


 
 
 
 
 
 

Most popular

 
 

Events

 
 

Copyright © 2021 - All Rights Reserved
ISSN 2767-1178

Top