中华口腔医学杂志
中華口腔醫學雜誌
중화구강의학잡지
Chinese Journal of Stomatology
2010年
6期
376-380
,共5页
蒋丽%赵永旗%张静超%廖运茂%李伟
蔣麗%趙永旂%張靜超%廖運茂%李偉
장려%조영기%장정초%료운무%리위
氧化铝%牙瓷料%力学性能%半透明性
氧化鋁%牙瓷料%力學性能%半透明性
양화려%아자료%역학성능%반투명성
Aluminum oxide%Dental porcelain%Mechanical properties%Translucency
目的 通过测定不同Al2O3含量的牙科纳米氧化锫复合陶瓷材料的烧结密度、力学性能和可见光积分透射比,探讨Al2O3添加量对复合陶瓷力学性能及半透明性的影响.方法 分别测量Al2O3质量百分数分别为2.5%、5.0%、7.5%、10.0%的Al2O3组和对照组(不含Al2O3)氧化锆陶瓷试件的烧结密度、三点弯曲强度和断裂韧性,采用分光光度计测量可见光积分透射比,扫描电镜观察试件断面形貌.结果 对照组试件常压烧结下烧结密度为(6.04±0.03)g/cm3,接近理论密度,三点弯曲强度为(1100.27±54.82)MPa,断裂韧性为(4.96±0.35)MPa·m1/2,透射比高达17.03%;2.5%、5.0%、7.5%、10.0%Al2O3组随Al2O3含量的增加,试件的烧结密度和透射比下降,断裂韧性有所提高;Al2O3 4组间三点弯曲强度的差异无统计学意义(P>0.05);10.0%Al2O3组试件的断裂韧性为(6.13±0.44)MPa·m1/2,透射比明显降低至6.21%.Al2O3对四方氧化锆晶粒的大小和分布无明显影响.结论 添加Al2O3可影响氧化锆复合陶瓷的力学性能和半透明性,添加复合相需兼顾临床对陶瓷材料力学性能和透光性的要求.
目的 通過測定不同Al2O3含量的牙科納米氧化锫複閤陶瓷材料的燒結密度、力學性能和可見光積分透射比,探討Al2O3添加量對複閤陶瓷力學性能及半透明性的影響.方法 分彆測量Al2O3質量百分數分彆為2.5%、5.0%、7.5%、10.0%的Al2O3組和對照組(不含Al2O3)氧化鋯陶瓷試件的燒結密度、三點彎麯彊度和斷裂韌性,採用分光光度計測量可見光積分透射比,掃描電鏡觀察試件斷麵形貌.結果 對照組試件常壓燒結下燒結密度為(6.04±0.03)g/cm3,接近理論密度,三點彎麯彊度為(1100.27±54.82)MPa,斷裂韌性為(4.96±0.35)MPa·m1/2,透射比高達17.03%;2.5%、5.0%、7.5%、10.0%Al2O3組隨Al2O3含量的增加,試件的燒結密度和透射比下降,斷裂韌性有所提高;Al2O3 4組間三點彎麯彊度的差異無統計學意義(P>0.05);10.0%Al2O3組試件的斷裂韌性為(6.13±0.44)MPa·m1/2,透射比明顯降低至6.21%.Al2O3對四方氧化鋯晶粒的大小和分佈無明顯影響.結論 添加Al2O3可影響氧化鋯複閤陶瓷的力學性能和半透明性,添加複閤相需兼顧臨床對陶瓷材料力學性能和透光性的要求.
목적 통과측정불동Al2O3함량적아과납미양화부복합도자재료적소결밀도、역학성능화가견광적분투사비,탐토Al2O3첨가량대복합도자역학성능급반투명성적영향.방법 분별측량Al2O3질량백분수분별위2.5%、5.0%、7.5%、10.0%적Al2O3조화대조조(불함Al2O3)양화고도자시건적소결밀도、삼점만곡강도화단렬인성,채용분광광도계측량가견광적분투사비,소묘전경관찰시건단면형모.결과 대조조시건상압소결하소결밀도위(6.04±0.03)g/cm3,접근이론밀도,삼점만곡강도위(1100.27±54.82)MPa,단렬인성위(4.96±0.35)MPa·m1/2,투사비고체17.03%;2.5%、5.0%、7.5%、10.0%Al2O3조수Al2O3함량적증가,시건적소결밀도화투사비하강,단렬인성유소제고;Al2O3 4조간삼점만곡강도적차이무통계학의의(P>0.05);10.0%Al2O3조시건적단렬인성위(6.13±0.44)MPa·m1/2,투사비명현강저지6.21%.Al2O3대사방양화고정립적대소화분포무명현영향.결론 첨가Al2O3가영향양화고복합도자적역학성능화반투명성,첨가복합상수겸고림상대도자재료역학성능화투광성적요구.
Objective To study the effects of alumina content on sintered density, mechanical property and translucency of zirconia nanocomposite all-ceramics. Methods Specimens of zirconia nanocomposite all-ceramics were divided into five groups based on their alumina content which are 0% (control group), 2. 5% , 5. 0% , 7. 5% and 10. 0% respectively. The sintered densities were measured using Archimedes' method. Specimens' bending strengths were measured with three-point bending test( ISO 6872). The visible light transmittances were measured with spectrophotometric arrangements and the fractured surfaces were observed using scanning electron microscope (SEM).Results The control group of pure zirconia could be sintered to the theoretical density under pressure-less sintering condition. The bending strength was (1100.27 ±54.82) MPa, the fracture toughness was (4.96 ±0.35) MPa·m1/2 and the transmittance could reach 17. 03%. The sintered density and transmittance decreased as alumina content increased from 2. 5% to 10%. However, the fracture toughness only increased slightly. In all four alumina groups, the additions of alumina had no significant effect on samples' bending strengths (P >0. 05). When the content of alumina was 10% , fracture toughness of specimens reached (6. 13 ±0.44) MPa·m1/2 while samples' transmittance declined to 6. 21 %. SEM results showed that alumina particles had no significant effect on the grain size and distribution of tetragonal zirconia polycrystals. Conclusions Additions of alumina to yttria-tetragonal zirconia polycrystals could influence its mechanical property and translucency. Additions of the other phase to zirconia ceramics should meet the clinical demands of strength and esthetics.
