Effects of different surface finishing protocols for zirconia on surface roughness and bacterial biofilm formation

Du-Hyeong Lee; Hang-Nga Mai; Phyu Pwint Thant; Su-Hyung Hong; Jaewon Kim; Seung-Mi Jeong; Keun-Woo Lee

doi:10.4047/jap.2019.11.1.41

Back

Effects of different surface finishing protocols for zirconia on surface roughness and bacterial biofilm formation

Journal article

Open access

Peer reviewed

Effects of different surface finishing protocols for zirconia on surface roughness and bacterial biofilm formation

Du-Hyeong Lee, Hang-Nga Mai, Phyu Pwint Thant, Su-Hyung Hong, Jaewon Kim, Seung-Mi Jeong and Keun-Woo Lee

The journal of advanced prosthodontics, Vol.11(1), pp.41-47

02/01/2019

DOI: 10.4047/jap.2019.11.1.41

PMCID: PMC6400710

PMID: 30847048

Files and links (1)

url

https://doi.org/10.4047/jap.2019.11.1.41View

Published (Version of record) Open Access

Abstract

PURPOSE. Surface finishing of a zirconia restoration is essential after clinical adjustment. Herein, we investigated the effects of a surface finishing protocol for monolithic zirconia on final roughness and bacterial adherence. MATERIALS AND METHODS. Forty-eight disk-shaped monolithic zirconia specimens were fabricated and divided into four groups (n = 12) based on initial surface treatment, finishing, and polishing protocols: diamond bur+polishing bur (DP group), diamond burrstone grinding bur+polishing bur (DSP group), no diamond bur+polishing bur (NP group), and no diamond bur+stone grinding bur+polishing bur (NSP group). Initial and final surface roughness was measured with a profilometer, and shown using scanning electron microscope. Bacterial adhesion was evaluated by quantifying Streptococcus mutans in the biofilm. Kruskal- Wallis and Mann-Whitney U tests were used to compare results among groups, and two-way analysis of variance was used to evaluate the effects of grinding burs on final roughness (alpha=.05). RESULTS. The DP group had the highest final Ra value, followed by the DSP, NP, and NSP groups. Use of the stone grinding bur as a coarse-finishing step significantly decreased final Ra values when a diamond bur was used (P<.001). Omission of the stone grinding bur increased biofilm formation on specimen surfaces. Combining a stone grinding bur with silicone polishing burs produced the smallest final biofilm values, regardless of the use of a diamond bur in initial surface treatment. CONCLUSION. Coarse finishing of monolithic zirconia with a stone grinding bur significantly decreased final Ra values and bacterial biofilm formation when surfaces had been roughened by a diamond bur.

Dentistry, Oral Surgery & Medicine

Life Sciences & Biomedicine

Science & Technology

Details

Title: Subtitle: Effects of different surface finishing protocols for zirconia on surface roughness and bacterial biofilm formation
Creators: Du-Hyeong Lee - Kyungpook Natl Univ, Sch Dent, Dept Prosthodont, ITRD, Daegu, South Korea
Hang-Nga Mai - Kyungpook Natl Univ, Sch Dent, Dept Prosthodont, ITRD, Daegu, South Korea
Phyu Pwint Thant - Kyungpook National University
Su-Hyung Hong - Kyungpook Natl Univ, Sch Dent, Dept Microbiol & Immunol, Daegu, South Korea
Jaewon Kim - University at Buffalo, State University of New York
Seung-Mi Jeong - Yonsei University
Keun-Woo Lee - Yonsei University
Resource Type: Journal article
Publication Details: The journal of advanced prosthodontics, Vol.11(1), pp.41-47
DOI: 10.4047/jap.2019.11.1.41
PMID: 30847048
PMCID: PMC6400710
NLM abbreviation: J Adv Prosthodont
ISSN: 2005-7806
eISSN: 2005-7814
Publisher: Korean Acad Prosthodontics
Number of pages: 7
Grant note: 2017R1C1B2004976 / National Research Foundation of Korea (NRF) - Korea government (MSIP)
Language: English
Date published: 02/01/2019
Academic Unit: Prosthodontics
Record Identifier: 9984914144602771

Metrics

2 Record Views