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10 June 2024 : Animal Research  

The Impact of Repeated Steam Sterilization Cycles on the Efficacy of Chairside Adjustment Kits for Polishing Monolithic Multi-Layered Zirconia Dental Restoration Material

Mohammed E. Sayed ORCID logo1ABEFG*, Honey Lunkad ORCID logo1ABEFG, Enas Jaber Mohana ORCID logo2BCDEF, Sara Ahmad Mesawa ORCID logo2BCDEF, Fatimah Ibrahim Dowairi ORCID logo2BCDEF, Emad Aldeen A. Alharbi ORCID logo2BCDEF, Hayat Ali Hakami ORCID logo3BCEF, Hossam F. Jokhadar ORCID logo4ACDEG, Nasser M. Alqahtani ORCID logo5ACDEF, Abdullah Hasan Alshehri ORCID logo5CDEFG, Ebrahim Fihaid Alsubaiy ORCID logo5CDEFG, Saeed M. Alqahtani ORCID logo5ACDEF, Nagam Mohammed Mohsen ORCID logo6CDEG, Mohammed H.D. Al Wadei ORCID logo7CDEG, Khurshid Mattoo ORCID logo1ACDEF

DOI: 10.12659/MSM.944502

Med Sci Monit 2024; 30:e944502

Abstract

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BACKGROUND: Before insertion, chairside adjustment kits are heat sterilized for positioning and polishing dental restorations. This study aimed to evaluate the effects of 2 steam sterilization cycles on the efficacy of polishing highly translucent monolithic zirconia (HTMLZ) dental restoration material.

MATERIAL AND METHODS: 100 HTMLZ disc-shaped specimens were adjusted (grinding, finishing, polishing) with EVE Diacera kit. Two steam sterilization techniques [standard (Gp S), immediate/flash (Gp (F)] of CAK were further subgrouped based on number of sterilization cycles [cycle 1 (control), cycle 5, 10, 15, and 20 (experimental)] (n=10 each). Each subgroup accordingly was evaluated for average surface roughness (Ra) and root mean square roughness (Rq) using a profilometer. Mean and standard deviation of 5 subgroups were statistically analyzed using one-way ANOVA/post hoc Tukey’s test. Scanning electron microscopy complemented Ra, Rq measurements. Statistical differences of P≤0.05 were considered significant.

RESULTS: HTMLZ specimens in both groups showed increased (Ra/Rq) values after repeated sterilization of EVE Diacera kit, with Gp F showing lesser increase than Gp S (20 cycles). Gp F at 10 cycles and Gp S at 15 cycles showed clinically unacceptable roughness threshold (0.25 μm). Differences between subgroups for Ra and Rq values were significant (P≤0.05) with less differences within groups observed in early cycles (1, 10). Results validate the manufacturer’s recommendations of using flash sterilization/10 cycles for EVE Diacera kit.

CONCLUSIONS: Repeated sterilization reduces efficacy of chairside adjustment kit to produce smooth surfaces on HTMLZ. This study recommends flash sterilization to a maximum of 10 times to get the clinically acceptable results of Ra and Rq.

Keywords: Denture, Partial, Fixed, Disinfection, Steam, Sterilization, Yttria Stabilized Tetragonal Zirconia

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01 June 2024 : Editorial  

Editorial: Concerns as Highly Pathogenic Avian Influenza (HPAI) Virus of the H5N1 Subtype is Identified in Dairy Cows and Other Mammals

Dinah V. Parums

DOI: 10.12659/MSM.945315

Med Sci Monit 2024; 30:e945315

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750