中华口腔医学杂志
中華口腔醫學雜誌
중화구강의학잡지
Chinese Journal of Stomatology
2015年
8期
474-477
,共4页
唐天宇%王晓东%简裕涛%赵克
唐天宇%王曉東%簡裕濤%趙剋
당천우%왕효동%간유도%조극
牙瓷料%牙修复失效%牙冠(假体)%表面处理
牙瓷料%牙脩複失效%牙冠(假體)%錶麵處理
아자료%아수복실효%아관(가체)%표면처리
Dental porcelain%Dental restoration failure%Crowns%Surface treatment
目的 探讨核瓷表面处理对二硅酸锂、氧化锆双层瓷失效行为的影响,为其临床加工制作提供依据.方法 二硅酸锂和氧化锆核瓷试件均按随机数字表分为4个组(每组样本量为12),碳化硅砂纸逐级打磨至1 000目(A组)、600目(B组)、320目(C组)或行喷砂后不打磨(D组)处理并测定表面粗糙度.两种核瓷烧结饰瓷后测定断裂强度并计算韦布尔模数(m值),分析失效模式.结果 对于二硅酸锂双层瓷,4组断裂强度差异无统计学意义(F=0.406,P=0.750),4组m值95％置信区间重叠,各组均以饰瓷内聚失效为主.对于氧化锆双层瓷,D组断裂强度[(640±95) MPa]显著高于其他3组[A、B、C组分别为(541±75)、(533±73)、(529±78) MPa] (P＜0.05),4组m值95％置信区间重叠,各组均以饰瓷剥脱失效为主.结论 二硅酸锂核瓷的表面处理对双层瓷结构失效行为无显著影响;喷砂有助于提高氧化锆双层瓷结构的断裂强度,减少界面处饰-核瓷的分层.
目的 探討覈瓷錶麵處理對二硅痠鋰、氧化鋯雙層瓷失效行為的影響,為其臨床加工製作提供依據.方法 二硅痠鋰和氧化鋯覈瓷試件均按隨機數字錶分為4箇組(每組樣本量為12),碳化硅砂紙逐級打磨至1 000目(A組)、600目(B組)、320目(C組)或行噴砂後不打磨(D組)處理併測定錶麵粗糙度.兩種覈瓷燒結飾瓷後測定斷裂彊度併計算韋佈爾模數(m值),分析失效模式.結果 對于二硅痠鋰雙層瓷,4組斷裂彊度差異無統計學意義(F=0.406,P=0.750),4組m值95％置信區間重疊,各組均以飾瓷內聚失效為主.對于氧化鋯雙層瓷,D組斷裂彊度[(640±95) MPa]顯著高于其他3組[A、B、C組分彆為(541±75)、(533±73)、(529±78) MPa] (P＜0.05),4組m值95％置信區間重疊,各組均以飾瓷剝脫失效為主.結論 二硅痠鋰覈瓷的錶麵處理對雙層瓷結構失效行為無顯著影響;噴砂有助于提高氧化鋯雙層瓷結構的斷裂彊度,減少界麵處飾-覈瓷的分層.
목적 탐토핵자표면처리대이규산리、양화고쌍층자실효행위적영향,위기림상가공제작제공의거.방법 이규산리화양화고핵자시건균안수궤수자표분위4개조(매조양본량위12),탄화규사지축급타마지1 000목(A조)、600목(B조)、320목(C조)혹행분사후불타마(D조)처리병측정표면조조도.량충핵자소결식자후측정단렬강도병계산위포이모수(m치),분석실효모식.결과 대우이규산리쌍층자,4조단렬강도차이무통계학의의(F=0.406,P=0.750),4조m치95％치신구간중첩,각조균이식자내취실효위주.대우양화고쌍층자,D조단렬강도[(640±95) MPa]현저고우기타3조[A、B、C조분별위(541±75)、(533±73)、(529±78) MPa] (P＜0.05),4조m치95％치신구간중첩,각조균이식자박탈실효위주.결론 이규산리핵자적표면처리대쌍층자결구실효행위무현저영향;분사유조우제고양화고쌍층자결구적단렬강도,감소계면처식-핵자적분층.
Objective To evaluate the effect of core ceramic surface treatment on the failure behaviors of two bilayered all-ceramic structures.Methods Lithium disilicate glass-ceramic(LDG,IPS e.max Press) and Zirconia(Cercon) specimens were divided into 4 groups(n=12) according to the following surface treatment methods:ground successively to 1 000(group A),600(group B) and 320(group C)grit silicon carbide(SiC) papers and sandblasted with 110 μm aluminum oxide particle(group D,as control).Surface roughness was measured using a profilometer.After veneer sintering,the flexural strength σ was measured with biaxial flexure test and the reliability of strength was analyzed with Weibull distribution.Failure modes and fractographic patterns were analyzed by optical stereo and scanning electron microscopy (SEM).Results For LDG,no significant difference was found for the flexural strength values among groups (F=0.406,P=0.750).No significant difference was found in Weibull modulus among groups(the confidence bounds overlapped with each other).SEM and optical stereo observation results showed that all the bilayered LDG specimens failed cohesively.For zirconia,Mean flexural strength values were (541 ± 75),(533± 73),(529 ± 78) and (640 ± 95) MPa for groups A,B,C and D,respectively,and group D demonstrated a significantly higher flexural strength compared to the other three groups(P ＜ 0.05).No significant difference were found among groups(the confidence bounds overlapped with each other).Specimens in all groups failed mainly adhesively,while those in group D presented lower percentage of adhesive failure.Conclusions Core ceramic surface treatment has no influence on the failure behaviors of LDG based bilayered structures.Sandblasting can increase the flexural strength of bilayered zirconia structures by reducing the incidence of delamination.
