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使用市售磨料进行模拟椅旁研磨程序对氧化锆表面性能的影响。

Effect of simulated chairside grinding procedures using commercially available abrasive agents on the surface properties of zirconia.

作者信息

Sandhu Ramandeep, Kheur Mohit, Kheur Supriya

机构信息

Department of Prosthodontics, M. A. Rangoonwala Dental College, Pune, Maharashtra, India.

Department of Oral Pathology, DPU University, DY Patil Dental College, Pimpri, Pune, Maharashtra, India.

出版信息

J Indian Prosthodont Soc. 2017 Jan-Mar;17(1):22-28. doi: 10.4103/0972-4052.194938.

DOI:10.4103/0972-4052.194938
PMID:28216841
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5308068/
Abstract

AIM

The aim of the present study was to assess the change in physical properties (surface roughness, surface hardness and phase transformation) after surface grinding of zirconia by using three commercially available abrasives.

MATERIALS AND METHODS

Thirty sintered zirconia specimens were prepared and divided into three groups namely Group M (grinded using Mani Dia diamond bur standard grit), Group T (grinded using Tri Hawk diamond bur coarse grit) and Group P (grinded using Predator carbide bur). A customised assembly was used to follow a standardised protocol for surface grinding. The surface roughness, surface hardness and phase transformation was recorded before and after the grinding procedure.

STATISTICAL ANALYSIS USED

ANOVA and Bonferroni post hoc test were used to assess the values obtained after the testing the surface roughness and surface hardness.

RESULTS

The results of the present study revealed the average values of change in surface roughness as Group M (0.44 m) and Group T (1.235 m) and Group (-0.88 m). The average values of change in surface hardness were Group T (19.578 HV), Group M (46.722 HV) and Group P (36.429 HV). The change in surface hardness was not statistically significant. There was no phase transformation seen after the grinding procedure.

CLINICAL SIGNIFICANCE

Carbide burs along with copious water irrigation when used to grind zirconia intra-orally produces has a polishing effect, minimal change in hardness & no phase transformation. The present study advocates the use of carbides for chair-side grinding of zirconia.

摘要

目的

本研究的目的是评估使用三种市售磨料对氧化锆进行表面研磨后其物理性能（表面粗糙度、表面硬度和相变）的变化。

材料与方法

制备30个烧结氧化锆试样，并分为三组，即M组（使用马尼钻石车针标准粒度进行研磨）、T组（使用三鹰钻石车针粗粒度进行研磨）和P组（使用掠夺者硬质合金车针进行研磨）。使用定制装置按照标准化方案进行表面研磨。在研磨程序前后记录表面粗糙度、表面硬度和相变情况。

所用统计分析方法

采用方差分析和Bonferroni事后检验来评估测试表面粗糙度和表面硬度后获得的值。

结果

本研究结果显示，表面粗糙度变化的平均值为M组（0.44μm）、T组（1.235μm）和P组（-0.88μm）。表面硬度变化的平均值为T组（19.578 HV）、M组（46.722 HV）和P组（36.429 HV）。表面硬度的变化无统计学意义。研磨程序后未观察到相变。

临床意义

在口内使用硬质合金车针并大量水冲洗来研磨氧化锆时具有抛光效果，硬度变化最小且无相变。本研究提倡在椅旁研磨氧化锆时使用硬质合金。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/14df544be57f/JIPS-17-22-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/89c06b0662c0/JIPS-17-22-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/0df424bda124/JIPS-17-22-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/89432548ba77/JIPS-17-22-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/14a61681da8c/JIPS-17-22-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/d02b28c417c0/JIPS-17-22-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/5dbb35817830/JIPS-17-22-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/833b67d7bead/JIPS-17-22-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/14df544be57f/JIPS-17-22-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/89c06b0662c0/JIPS-17-22-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/0df424bda124/JIPS-17-22-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/89432548ba77/JIPS-17-22-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/14a61681da8c/JIPS-17-22-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/d02b28c417c0/JIPS-17-22-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/5dbb35817830/JIPS-17-22-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/833b67d7bead/JIPS-17-22-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/592d/5308068/14df544be57f/JIPS-17-22-g008.jpg

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