充塡用 글라스아이오노머 시멘트의 耐磨耗度 및 硬度에 關한 實驗的 硏究
AN EXPERIMENTAL STUDY ON THE WEAR AND HARDNESS OF GLASS-IONOMER CEMENTS FOR FILLING (TYPE II)
소속 상세정보
오혜은(吳惠恩)/Hye Eun Oh
차문호(車文豪)/Moon Ho Cha
KMID : 0358919890160020044
Abstract
結論
充塡用 글라시아이오노머 시멘트의 耐磨耗度 및 硬度에 대해서 觀察하고자, 여섯 種類의
充塡用 글라스아이오노머 시멘트를 各各 混合하여 24時間 室溫에서 硬化시킨 後, 37%에서
各其 空氣, 蒸溜水, 헵탄 溶液, 乳酸溶液 等에 一週日間 保管하여, 비커스 硬度値를 求하고
口腔內 狀態와 類似하게 再現된 磨耗實驗機械를 通한 磨耗度를 測定, 初期狀態와 比較하였
고, 글라스아이오노머 시멘트의 構造와 各 處理條件에 따른 變化狀態 및 그 磨耗面을 走査
電子顯微鏡으로 觀察하여 다음과 같은 結論을 얻었다.
1. 金屬 强化型 글라스아이오노머 시멘트에 있어서 金屬粒子를 글라스 粉末에 燒結시킨 境
遇, 從來의 글라스아이오노머 시멘트에 比해 耐磨耗度의 顯著한 改善을 보였으나, 金屬粒子
를 글라스 粉末에 單純히 混合시킨 경우, 耐磨耗度가 오히려 減少하였다.(P<0.05)
2. 充塡用 글라스아이오노머 시멘트는 初期硬化 後, 處理條件에 따라 硬度의 差異가 나타나
며(P<0.05) 特히 空氣中에 保管한 境遇, 硬度가 顯著히 增加하며, 乳酸溶液에 保管한 境遇
減少하였다.(P<0.05)
3. 充塡用 글라스아이오노머 시멘트는 初期硬化 後, 處理條件에 따라 耐磨耗度의 差異를 보
이며(P<0.05), 特히 乳酸溶液 및 空氣中에 保管한 境遇 그 差異가 認定되었다(P<0.05).
4. 充塡用 글라스아이오노머 시멘트의 表面은 各 處理條件에 따라, 變化가 觀察되었다.
#초록#
The purpose of this study was to observe the wear and hardness of glass-ionomer
cements for filling (type II). Six kinds of glass-ionomer cements for filling were used in
this study.
After each glass-ionomer cement was mixed according to the manufacturer's
instructions, the pastes were inserted into their molds and sustained at room
temperature for 24 hours. The finished specimens were removed from their molds and
pre-conditioned in air, distilled water, heptane, lactic acid at 37℃ for one week. The
hardness and wear were measured before and after pre-conditioning using Victor's
Hardness fester and specially designed wear-testing machine.
The surface structures of glass-ionomer cements were observed using scanning
electron microscope three times before and after pre-conditioning, after wear test.
The following results were obtained :
1. The wear resistance of glass-ionomer cement incorporating sintered metallic particles
was markedly enhanced over that of the conventional materials. But in case of simply
adding alloy particles to the glass-ionomer, the wear resistance was decreased. (p<0.05)
2. In most cases, changes in hardness before and after pre-conditioning were observed
(p<0.05), in particular for the air-stored specimens, the hardness was markedly
increased, but the hardness was decreased in lactic acid-stored specimens.(p<0.05)
3. In most cases, differences in the wear resistance by pre-conditioning media were
observed and in particular for the air or lactic acid-stored specimens, there were
significant differences.(p<0.05)
4. There were differences in surface structure according to the pre-conditioning media.
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