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-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...


Nowadays, the material of choice for single tooth full crowns restorations are lithium disilicate ceramic and zirconia. Both materials are very popular and could be veneered with feldspathic ceramic...


The conventional manufacturing protocols for the realization of removable complete dental prostheses (CRDP) are well established and are still...


The types of prosthetic preparations in the anterior teeth have always raised more or less heated debates. Regardless of the line or end of preparation area, it has always seemed of great...


Read more

From October 1st to 5th the annual meeting of the Academy of Dental Materials (ADM) was held in Jackson Hole (Wyoming, USA), entitled: "Materials to...


From October 1st to 5th the annual meeting of the Academy of Dental Materials was held in Jackson Hole (Wyoming, USA), entitled: "Materials to Enable the Evolution/Revolution of Digital...


Authors: M. Gobbo, G. Ottaviani, K. Rupel, M. Biasotto

A female patient was sent to the Medicine and Oral Pathology clinic of the Dental Clinic of Trieste for the evaluation of an intensely radiopaque foreign body...


Root caries results from the dissolution of minerals in dentine by the acids produced by bacteria, since dentine have a much lower mineral content when compared...


Tooth autotransplantation is the transplantation of one's own tooth from one site of the mouth to another edentulous site. This technique is possible only when a donor tooth is available....


 
 

Newsletter

 
 
 
 

Most popular

 
 

Events