Applicability of Zirconia-Prefabricated Crowns in Children with Primary Dentition

Abstract

Zirconia dioxide represents the current alternative in restoring primary teeth, being the most promising restorative material through its properties that offer. Zirconia crowns main properties are its aesthetics, resistance to fracture and compression, biocompatibility, alternative for the patients that are allergic to Ni-Cr. This cross-sectional study pointed out the correlations between the rate of applicability of the Ni-Cr crowns and the ZrO2 crowns, as well as the range of applicability of the ZrO2 crowns on temporary teeth among practitioners. The method of choice in the case of extensive carious lesions treatment on the primary teeth was the restoration using filling materials. From the 33,2% of the dentists who decide to apply a pedodontics crown, 75% use the Ni-Cr crowns, and only 25% of them choose the ZrO2 crown (p<0.0001). The applicability of ZrO2 crowns in pediatric dentistry is quite reduced, despite their physiognomic advantages, their excessive cost can also be an impediment for the patient's parents.

Use of stainless steel crowns and zirconia crowns in posterior primary teeth for children in different age groups

“…Zirconia crowns were least preferred among the study population (0.46%). Similar indings were shown in a previous study by Bica et al (2017); M. G. , where it was seen that zirconia crowns had better clinical performance and less plaque deposition when compared to stainless steel crowns. But, this is contradictory to indings of a study by Abdulhadi (2017), which showed that zirconia crowns had good aesthetics and stressbearing capacity and was highly preferred.…”

Indication And Use Of Zirconia Crowns On Decidual Teeth

“…According to the authors Bica (2017) and Ashima (2014), zirconia crowns have properties such as aesthetics, translucency, fracture and compression resistance, biocompatibility, thermostable. In addition, they have the possibility of adapting the crown only when traveling to the dental office, can be used in the autoclave and are a great alternative for patients allergic to Ni-Cr alloys (nickel and chromium) 4,11 . Shuman (2016), still brings that it has very low thermal conductivity, high impact resistance, high chemical resistance (both acids and bases) and high wear resistance 3 .…”

“…Among its properties, are: aesthetics, fracture and compression resistance, biocompatibility, possibility of adapting the crown only when traveling to the dental office, can be used in the autoclave and are an alternative for patients allergic to alloys. nickel and chromium 11 . In addition, it has very low thermal conductivity, high impact resistance, high chemical resistance (both to acids and bases) and high wear resistance 3 .In addition, zirconia is able to prevent the increase of cracks¹ 5 and is resistant to fractures, this is possible because the crystals of the tetragonal zirconia are transformed into the monoclinic form producing tension compression 16 .This characteristic makes it possible for this material to have a wide application of clinical success 15 .…”

“…Despite the wide range of advantages that zirconia presents, its use has some disadvantages, such as the fact that they cannot be modified, 11 so it is essential to insert and test the crown in the preparation before cementing it, in order to guarantee that the margins and occlusion have the appropriate dimensions 17 . This type of crown has a high cost and, when there is a fracture, the zirconia crown has to be completely replaced 11 .…”

“…Despite the wide range of advantages that zirconia presents, its use has some disadvantages, such as the fact that they cannot be modified, 11 so it is essential to insert and test the crown in the preparation before cementing it, in order to guarantee that the margins and occlusion have the appropriate dimensions 17 . This type of crown has a high cost and, when there is a fracture, the zirconia crown has to be completely replaced 11 . Furthermore, the biggest limitation of zirconia is its degradation at low temperatures, also known as hydrothermal degradation or aging, and consists of the transformation of the zirconia surface into the monoclinic phase, when present in humid environments with moderate temperatures, which covers the characteristics of the human body 18 .…”