The Surface Deterioration of Prefabricated Zirconia Crowns on Exposure to Acidulated Phosphate Fluoride Gel: An In Vitro Study.

Autor:	Makwana SL; Department of Prosthodontics, Crown and Bridge, Karnavati School of Dentistry, Gandhinagar, IND., Vaishnav K; Department of Prosthodontics, Crown and Bridge, Karnavati School of Dentistry, Gandhinagar, IND., Joshi R; Department of Prosthodontics, Crown and Bridge, Karnavati School of Dentistry, Gandhinagar, IND., Patel TH; Department of Prosthodontics, Crown and Bridge, Karnavati School of Dentistry, Gandhinagar, IND., Vora NN; Department of Prosthodontics, Crown and Bridge, Karnavati School of Dentistry, Gandhinagar, IND., Sachde NH; Department of Dentistry, University of the Pacific, San Francisco, USA., Vala KA; Department of Conservative Dentistry and Endodontics, Government Dental College and Hospital, Ahmedabad, IND., Raval Z; Department of Prosthodontics, Crown and Bridge, Karnavati School of Dentistry, Gandhinagar, IND., Yohannan JA; Department of Prosthodontics, Crown and Bridge, Karnavati School of Dentistry, Gandhinagar, IND., Joshi VJ; Department of Paediatric and Preventive Dentistry, Karnavati School of Dentistry, Gandhinagar, IND.
Jazyk:	angličtina
Zdroj:	Cureus [Cureus] 2024 Aug 07; Vol. 16 (8), pp. e66371. Date of Electronic Publication: 2024 Aug 07 (Print Publication: 2024).
DOI:	10.7759/cureus.66371
Abstrakt:	Introduction Zirconia is a widely used restorative material in dentistry due to its superior aesthetic and mechanical properties. The oral cavity is a complex ecosystem with various components, which affect the teeth, as well as artificial restorative materials. Various personal and professional interventions carried out can severely affect the properties of restorative materials, thus altering the longevity of the prosthesis; 1.23% acidulated phosphate fluoride (APF) gel is one such professionally applied topical fluoride agent used to prevent caries. The interaction of this APF gel with highly aesthetic restorative material such as zirconia crowns is unknown. Objective The objective of this study is the evaluation of the surface deterioration of prefabricated zirconia crowns on exposure to deionised water and 1.23% acidulated phosphate fluoride (APF) gel with field emission scanning electron microscope (FE-SEM) and mass loss analysis. Material and method Sixty prefabricated paediatric zirconia crowns were taken, 10 samples were immersed in deionised water, 40 samples were immersed in 1.23% APF gel and 10 samples were used as control. Surface morphology and mass loss analysis were carried out at time intervals of four minutes, 24 hours, 48 hours and 72 hours using FE-SEM and digital weighing machine. Results No visual change was observed in the samples immersed in deionised water at the time interval of 72 hours. There was a marked visual change in samples immersed in 1.23% APF gel at the time interval of four minutes to 72 hours; this change involved a loss of gloss to the appearance of chalkiness. FE-SEM analysis for the control group and samples immersed in deionised water showed a smooth, continuous, undisrupted top layer, while samples immersed in 1.23% APF gel showed changes ranging from surface etching, to pinhole porosities, to crack formation and disruption of the surface depending upon the exposure time. Conclusions On the immersion of zirconia crowns in an aqueous acidic medium of 1.23% APF gel, the crowns showed flaws, imperfections and uneven superficial layers. It has been observed that surface grains are disrupted and micropores have been formed. This degraded superficial surface when undergoes cyclic mechanical loading can accelerate the ageing phenomenon of zirconia. Mechanical forces along with a dynamic electrochemical environment can degrade the material properties of zirconia. Competing Interests: Human subjects: All authors have confirmed that this study did not involve human participants or tissue. Animal subjects: All authors have confirmed that this study did not involve animal subjects or tissue. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work. (Copyright © 2024, Makwana et al.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu