臼齒用 複合레진의 磨耗에 관한 硏究
THE STUDY ON THE WEAR IN POSTERIOR COMPOSITE RESIN
소속 상세정보
김화봉(金和鳳)/Hwa Song Kim
車文豪(차문호)/Moon Ho Cha
KMID : 0358919890160020001
Abstract
V.結論
최근 臼齒에서의 複合 레진의 使用度가 增加하고 있는 추세이지만 아직 아말감과 比較시
耐磨耗性이 크게 떨어지므로 複合 레진 修復材料의 改善이 요구되는 실정이다. 이에 複合
레진의 磨耗에 영향을 미치는 여러 因子를 알아보기 위해 現在 國內에서 市販되고 있는 4種
의 臼齒用 複合레진에 대한 磨耗量을 de Gee등이 考按한 磨耗 機械로 磨耗를 시켜
profilometer와 寫眞 撮影法으로 測定했다. 測定된 磨耗量은 아말감을 基準으로 하여 相對的
인 評價를 實施하였으며 複合 레진의 物理的 性質중 硬度, 壓縮强度, 壓縮疲勞强度를 測定해
이들 각각과 磨耗度와의 相關關係를 調査하였고, 磨耗面, 壓縮破斷面, 壓縮疲勞破斷面을 走
査電子顯微鏡으로 觀察하여 다음과 같은 結論을 얻었다.
1. 磨耗度와 壓縮强度, 壓縮疲勞强度 및 硬度사이에 상관관계는 없는 것으로 나타났다(γ
=0.69, 0.64, 0.63, N=4, P>0.01)
2. 充塡材의 含量이 增加할수록 壓縮强度, 壓縮疲勞强度 및 硬度는 增加하였다(γ=0.86,
0.90, 0.90, N=4, P<0.01).
3. 充塡材의 含量과 磨耗度 사이에 상관관계는 없는 것으로 나타났다(γ=0.25, N=4,
P>0.01).
4. 모든 壓縮疲勞破斷面에서 줄무늬(striation type)가 나타났다.
5. 龜裂은 氣孔 部位에서 시작되었다.
#초록#
Since the application of composites has been extended to stress-bearing restorations in
posterior teeth, wear deserves attention. So the aim of this study was to find the
factors which influenced the wear in the posterior composite resins.
Measurements of in vitro wear for 4 posterior composite resins and amalgam were
conducted using a new device in which de Gee et al. developed, and to calculate the
relative wear, the profilometric data and photographs of the unworn and worn surfaces
were processed. This study presented the wear rate relative to that of an amalgam.
In addition to the measurements of hardness, compressive strength and compressive
fatigue limit were made. And then they were compared with the wear rate by
establishing the mutual linear correlation factor.
Meanwhile, this study also observed the worn surfaces and the fractured surfaces of
compressive strength and compressive fatigue limit using the scanning electron
microscope.
The results obtained from this study were as follows :
1. There were no correlationships between wear rate and hardness, compressive
strength and compressive fatigue limit.(γ=0.69, 0.64, 0.63 N=4 P>0.01)
2. The more filler contents (vol %), the greater V. H. N., compressive strength and
compressive fatigue limit were to be found.(γ=0.86, 0.90, 0.90, N=4, P<0.01)
3. There was no correlationship between wear rate and filler contents.(γ=0.25, N=4,
P>0.01)
4. The striation type was to be found in the fractured surfaces of compressive fatigue
limit.
5. The crack growth was initiated at the regions of porosities.
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