CAJ | 학술논문

目的采用三点弯曲法评价选区激光熔化钴铬合金金-瓷结合强度,以期为修复临床提供参考.方法依据ISO 9693标准,分别用铸造法(铸造组)和选区激光熔化法(选区激光熔化组)制作钴铬合金试件,每组6个,试件中间区域熔附瓷粉.三点弯曲法测试金-瓷结合强度,采用SPSS 13.0软件进行t检验,分析两组金-瓷结合强度差异；扫描电镜和能谱仪进行金-瓷结合界面分析.结果铸造组和选区激光熔化组金-瓷结合强度分别为(33.45 ±2.34)和(31.62 ±2.34) MPa,两组差异无统计学意义(t =0.79,P＞0.05).两组试件断裂类型均为混合断裂,仅微量瓷残余.结论选区激光熔化钴铬合金修复体可满足临床对金-瓷结合强度的要求.
목적 채용삼점만곡법평개선구격광용화고락합금금-자결합강도,이기위수복림상제공삼고.방법 의거ISO 9693표준,분별용주조법(주조조)화선구격광용화법(선구격광용화조)제작고락합금시건,매조6개,시건중간구역용부자분.삼점만곡법측시금-자결합강도,채용SPSS 13.0연건진행t검험,분석량조금-자결합강도차이；소묘전경화능보의진행금-자결합계면분석.결과 주조조화선구격광용화조금-자결합강도분별위(33.45 ±2.34)화(31.62 ±2.34) MPa,량조차이무통계학의의(t =0.79,P＞0.05).량조시건단렬류형균위혼합단렬,부미량자잔여.결론 선구격광용화고락합금수복체가만족림상대금-자결합강도적요구.
Objective To eveluate the metal-ceramic bond strength of a selective laser melting Co-Cr alloy.Methods Twelve Co-Cr metal bars were prepared according to the ISO 9693 standard with Vita porcelain fused onto the centre of each bar.Then the sample bars were devided into two groups of six each.The control group was made by traditional cast process(cast group),and the experimental group was processed by selective laser melting (SLM) technology (SLM group).Metal-ceramic bonding strength and fracture mode were assessed using three-point bending test.Fracture mode analysis was determined by scanning electronic microscope/energy dispersive spectroscopy.Student's t-test was used to analyze the data in SPSS 13.0.Results The metal-ceramic bond strength value of the cast group was (33.45 ±2.34) MPa,and that of the SLM group was (31.62 ± 2.34) MPa (t =0.79,P ＞ 0.05).A mixed fracture mode on the debonding interface of all specimens was observed,while little porcelain was reserved.Conclusions The metal-ceramic system processed by SLM exhibited a bonding strength that satisfies the requirement of clinical application.