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題 名 | 污染物對玻璃滲入陶瓷的鍵結強度之影響=Effect of Contaminants on the Bond Strength of Glass Infiltrated Ceramic |
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作 者 | 盧幼情; 李勝揚; | 書刊名 | 中華牙醫學雜誌 |
卷 期 | 18:3 1999.09[民88.09] |
頁 次 | 頁199-206 |
分類號 | 416.98 |
關鍵詞 | 鍵結強度; 玻璃滲入陶瓷; 樹脂黏著劑; Bond strength; Glass infiltrated ceramic; Adhesive cement; |
語 文 | 中文(Chinese) |
中文摘要 | 本實驗目的在研究 In-Ceram 與樹脂黏合劑間的黏著強度是否會受常見的臨床 性污染物所影響。將 70 個依廠商指示製備而成的試樣分成下列五個實驗組:(一)對照組 ,(二)唾液污染組,(三)唾液污染及氧化鋁噴砂組,(四)手套粉末污染組,(五)手 套粉末污染及氧化鋁噴砂組。每組 14 個試樣經上述臨床模擬污染後,以 Panavia 21 樹脂 黏合劑將樹脂複合材圓柱體黏在試樣中央。每組中的 7 個試樣經貯存于 37 ℃水中 24 小 時後,另外 7 個試樣經貯存在 37 ℃水中 14 天後,分別再在以 5 ℃及 55 ℃進行 2000 次冷熱循環後,利用萬能材料測試機用切力強度測試。以變異數分析 ]ANOVA ),Tukey LSD test 及 Student t-test 作結果循環 3 之統計分析,並利用電子顯微鏡觀察測試後斷 裂模式。結果顯示,唾液或手套粉末污染以及泠熱循環處理都會降低黏著強度。而噴砂處理 可以改善手套粉末污染組的黏著強度,但不能改善唾液污染組的黏著強度。經過冷熱循環處 理後,各組間之黏著強度無顯著差異。電子顯微鏡下顯示黏著性和內聚性兩種斷裂情況均有 。 |
英文摘要 | In-Ceram, a glass-infiltrated ceramic with high flexural strength, might be useful for fabricating anterior resin bonded fixed partial dentures. However, the bond strength in In-Ceram and resin luting cement may be influenced by saliva or glove powder contamination. The purpose of this study was to evaluate the differences in shear bond strength (SBS) between In-Ceram and resin luting cement. Seventy In-Ceram specimens were divided into five groups and exposed to various contaminants as follows:(1)control,(2)saliva contamination,(3)saliva contamination and aluminum oxide sandblast, (4)glove powder contamination, (5)glove powder contamination and aluminum oxide sandblast. A composite resin cylinder was cemented to each In-Ceram specimen with Panavia 21 resin luting cement. Half of the cemented specimens in each group were stored in water for 24 hours, and the other half were stored in water for 2 weeks and then were thermo-cycled for 2000 cycles. Shear bond strengths (SBS) of the 7 specimens in each subgroup were determined with a universal testing machine. Data were analysed using analysis of variance, Tukey LSD test and Student t-test. Specimens that demonstrated separation were checked under a scanning electronic microscope to identify the type of bond failure. SBS was significantly decreased by saliva and glove powder contamination (p<0.05). However, the glove powder plus sandblast group showed no significant difference in SBS compared with the control group (p>0.05). Sandblast treatment did not improve the saliva contaminated specimens. The SBS of groups with no thermocycling was significantly greater than that of groups with thermocycling (p<0.05). There were no significant differences among the SBS values of the five groups with thermocycling (p>0.05). Combine d cohesive and adhesive bond failure was seen on scanning electron photomicrographs. The result of this study suggested that saliva and glove powder contaminants could decrease the shear bond strength between In-Cerma and resin luting cement. |
本系統中英文摘要資訊取自各篇刊載內容。