HOME - Clinical cases - Prosthodontics
 
 
11 September 2019

Cementation of zirconia crowns: effectiveness of self-adhesive dual cements

Massimo Gagliani


The cementation of zirconia crowns is always the subject of considerations; the inability to have an adhesive bond with the material makes the fixing process always problematic. Many authors have pointed out that, on the basis of systematic reviews of the literature, the MDP-containing cements (a monomer now free on the market and usable by several companies) showed considerable advantages for the chemical bonding obtainable with the zirconia interface.

MATERIALS AND METHODS 
The study published in the Operative Dentistry examined "self-adhesive" cements (cements that can be used without conditioning the dentin substrate): RelyX U-200 (RXU200; 3M ESPE, Seefeld, Germany), SmartCem 2 (SC2; Dentsply, Milford, DE, USA), and G-Cem Automix (GCA; GC, Alsip, IL, USA). Panavia 21 (PAN; Kuraray Dental Co Ltd, Osaka, Japan), cement containing MDP was chosen for control. Single crowns were performed on the same appropriately rectified abutments and the values ​​related to the marginal precision, in microns, between the crown and the abutment, pre and post-cementation were measured. The adhesion strength was evaluated with a precision dynamometer after the samples were subjected to thermocycling to make the cementation process more similar to the natural conditions.

RESULTS 
The marginal precision was 34.8 ± 17.4 μm (pre-cementation) and 72.1 ± 31 μm (post-cementation), no significant difference was found between the groups of cements, while the adhesion values ​​were extremely variable, ie the highest values ​​were recorded in the SC2 and GCA groups (1385 Pa and 1229 Pa, respectively), while the lowest values ​​were found in the PAN and RXU200 groups (738 Pa and 489 Pa, respectively).

CONCLUSIONS 
Not all so-called "self-adhesive" cements, or resinous cements that do not require preliminary conditioning of the dentin surface, offer equal resistance in the cementation process of zirconia crowns. The choice of cement seems to be fundamental in the cementation phase of the zirconia crowns; appropriate information should be provided by the manufacturers.


For additional informations: 
Marginal Fit and Retention Strength of Zirconia Crowns Cemented by Self-adhesive Resin Cements.


Related articles

Co-author: Allegra Comba

When discussing about restorative dentistry and prosthodontics, rehabilitations with CAD/CAM high performance materials are an alternative to traditional...


The use of restorative materials to adhere to the dental surfaces and to preserve as much dental tissue as possible, has determined and conditioned the choice...


The restoration of endodontically treated teeth is always a topic of crucial attention for dentists. If until a few years ago, the therapeutic choice of...


Co-authors: Storelli S, Del Fabbro M, Scanferla M, Romeo E

Implant placement can be limited by anatomical conditions that may be overcome with different solutions: reduced dimension implants, bone regeneration procedures or...


Crown decementation are the most frequent failures in restorations using zirconia as an infrastructure. Increasing the roughness of the zirconia surface has been...


Read more

USA     20 February 2020 - 22 February 2020

Midwinter Meeting 2020

Where: McCormick Place West Building, 2301 S. Indiana Ave., ChicagoWhen: on February 20-22, 2020Topic: Restorative dentistry, Oral Cancer Symposium, Implantology, Health and Wellness, The business...


Dentists must regularly determine the best adhesive cementation protocol for glass-ceramic restorations on posterior teeth. A few in vivo follow-up...


Peri-implant mucositis is an inflammation of the mucosa around dental implant. Clinically, it is characterized by mucosal bleeding on peri-implant ...


Intrabony cista in the jaw are the most common benign findings in the oral and maxillofacial area. The best treatment option to manage intrabony cystic lesions...


Clinical management of periodontally compromised teeth with advanced mobility remains an arduous challenge to the dentists. Splints are being used to overcome...


 
 
 
 

Newsletter

 
 
 
 

Most popular

 
 

Events