HOME - Clinical cases - Prosthodontics
 
 
05 June 2019

Zirconia treatment for efficient cementation process

Massimo Gagliani


Crown decementation are the most frequent failures in restorations using zirconia as an infrastructure. Increasing the roughness of the zirconia surface has been suggested to address this problem. The purpose of this systematic review and meta-analysis was to evaluate yttria-stabilized tetragonal zirconia polycrystal surface roughness produced with aluminum oxide airborne-particle abrasion and the erbium yttrium aluminum garnet (YAG), neodymium-doped YAG, or CO2 laser.     

MATERIALS AND METHODS
A huge number of papers has been analyzed according the standards of the systematic review and data were extracted from 17 studies.   The first analysis of the subgroups was performed using the aluminum oxide airborne-particle abrasion and lasers. The second analysis, methodologies were subgrouped into 4 modalities:

  1. polished with silicon carbide abrasive papers in the presintered stage and airborne-particle abrasion with aluminum oxide after the sintering process,
  2. polished with silicon carbide abrasive papers in the presintered stage and airborne-particle abrasion with aluminum oxide after the sintering process,
  3. polished with silicon carbide abrasive papers in the postsintered stage and airborne-particle abrasion with aluminum oxide after the sintering process,
  4. no polish and airborne-particle abrasion with aluminum oxide after the sintering process.

RESULTS
The roughness was higher in the experimental groups submitted to surface treatment and the group that used airborne-particle abrasion in the presintered stage presented an effect size of 2.71 as the value of greater surface roughness. Third analysis, the subgroups were examined according to the type of laser The effect size favored the Nd:YAG laser as the highest surface roughness value, 4.15, when compared with the Er:YAG laser, 0.60.  
Techniques such as airborne-particle abrasion with aluminum oxide particles (Al2O3) were the most investigated surface treatment. In this systematic review,  94.7% of the airborne-particle abrasion was performed after the sintering process and only 5.3% before the sintering process. Airborne-particle abrasion with aluminum oxide before the sintering process was the most effective method because the presintered zirconia surface is softer.

CONCLUSIONS
Airborne-particle abrasion with aluminum oxide on presintered zirconia is currently the most efficient methodology. Irradiation with the Er:YAG, Nd:YAG, and CO2 la- sers was destructive due to the formation of a melted surface, large cracks, and a carbonized layer with silver pigments. Surface roughness is essential for the retention of dental restorations. These results provide a reference for the most researched and effective surface treatments.    


For additional informations:
Evaluation of zirconia surface roughness after aluminum oxide airborne-particle abrasion and the erbium-YAG, neodymium-doped YAG, or CO2 lasers: A systematic review and meta-analysis 

Related articles

The increased aesthetic demand, without sacrificing the preservation of biological structures, has led to the development and use, in recent years, new generations...


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...


Increasing demand for esthetic dental restorations has led to the popularity of ceramic restoration systems. Among these the most used is lithium disilicate,...


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


Co-authors: N. Ragazzini, L. Card, E. Evangelisti

The introduction of digital technologies in implant-prosthetic dentistry has allowed an improvement in the predictability of clinical results, the reduction...


Read more

Europe     20 June 2019 - 23 June 2019

Europerio9

Where: Amsterdam (Netherlands).When: on June 20-23, 2019. Topic: Periodontology and Implantology. For additional informations: https://www.efp.org/europerio9/index.html


In the May 2019 issue of the Journal The Angle Orthodontist an article was published concerning long-term effects of various cleaning methods on...


Periodontitis is a chronic inflammatory disease characterized by an irreversible loss of connective tissue attachment and alveolar bone and it is a major cause...


Author: Riccardo Mauro Bonacina

Patient AB, a 46-year-old male, comes to our observation complaining of an increase in volume at the palatal level for about a month. The systemic anamnesis...


Panoramic radiography, also known as orthopantomography (OPG), is commonly used in facial and dental pain investigations. This radiographic modality shows the...


 
 

Newsletter

 
 
 
 

Most popular

 
 

Events