CAJ | 학술논문

目的：探讨不同酸蚀粘接系统对流动树脂行窝沟封闭的影响。方法：60颗离体牙随机分为4组（n ＝15）：A 组（Gluma、NT、3MZ350流动树脂），B 组（ClearFil SE Bond、3M Z350流动树脂），C 组（Gluma、3M Z350流动树脂），D 组（Gluma、3Mconcise 封闭剂）。处理牙面后封闭窝沟（n ＝10），1％次甲基蓝染色观察边缘微渗漏（n ＝8），扫描电镜下观察材料－釉质界面的形态学改变（n ＝2）。牙齿（n ＝5）近中或远中面用相应材料处理后堆积成直径3 mm、高3 mm 的圆柱，测试材料与牙面间的剪切粘接强度。制备直径4 mm、高4 mm 的窝沟封闭剂和流动树脂圆柱各10个，测试其抗压强度。结果：4组微渗漏情况差异无显著性。电镜观察 A 组界面树脂突长且密集，B 组界面树脂突较短而稀疏，2组局部皆有气泡、裂隙；C 组树脂突长而稀疏，与牙体组织结合紧密；D 组树脂突短而密集；4组在窝沟底部渗透均较差。A 组剪切粘接强度最高（P ＜0．01），C 组高于 B 组和 D 组（P ＜0．05），B 组和 D 组间差异无显著性（P ＞0．05）。流动树脂抗压强度高于封闭剂（P ＜0．05）。结论：全酸蚀粘接系统处理组和酸蚀后直接结合流动树脂组的剪切粘接强度和抗压强度优于自酸蚀粘接系统处理组和传统封闭剂组，酸蚀后使用 NT 粘接可提高其剪切粘接强度和抗压强度。
목적：탐토불동산식점접계통대류동수지행와구봉폐적영향。방법：60과리체아수궤분위4조（n ＝15）：A 조（Gluma、NT、3MZ350류동수지），B 조（ClearFil SE Bond、3M Z350류동수지），C 조（Gluma、3M Z350류동수지），D 조（Gluma、3Mconcise 봉폐제）。처리아면후봉폐와구（n ＝10），1％차갑기람염색관찰변연미삼루（n ＝8），소묘전경하관찰재료－유질계면적형태학개변（n ＝2）。아치（n ＝5）근중혹원중면용상응재료처리후퇴적성직경3 mm、고3 mm 적원주，측시재료여아면간적전절점접강도。제비직경4 mm、고4 mm 적와구봉폐제화류동수지원주각10개，측시기항압강도。결과：4조미삼루정황차이무현저성。전경관찰 A 조계면수지돌장차밀집，B 조계면수지돌교단이희소，2조국부개유기포、렬극；C 조수지돌장이희소，여아체조직결합긴밀；D 조수지돌단이밀집；4조재와구저부삼투균교차。A 조전절점접강도최고（P ＜0．01），C 조고우 B 조화 D 조（P ＜0．05），B 조화 D 조간차이무현저성（P ＞0．05）。류동수지항압강도고우봉폐제（P ＜0．05）。결론：전산식점접계통처리조화산식후직접결합류동수지조적전절점접강도화항압강도우우자산식점접계통처리조화전통봉폐제조，산식후사용 NT 점접가제고기전절점접강도화항압강도。
Objective:To evaluate the effects of the flowable resin used as pit and fissure sealant using different etching adhesive systems.Methods:60 caries-free extracted human premolars were randomly divided into 4 groups(n =1 5)and treated by Gluma, NT and 3M-Z350 flowable resin(group A);Clearifil SE Bond adhesive and 3M-Z350 flowable resin(group B),phosphoric acid etching,3M-Z350 flowable resin and phosphoric acid etching(group C)and 3Mconcise sealant(group D)respectively.After pro-cessing the tooth surface the pit and fissue of 1 0 sample in each group were sealed.The microleakage was measured by 1 % methyl-ene blue staining(n =8).The material-enamel interface was observed by SEM(n =2).The shear bond strength of the column-shaped samples with the diameter and the height of 3 mm(n =5)on the mesial or dental surface was examined by a test machine. The sealant cartridges and flowable resin cartridges with the diameter and height of 4 mm were used for the crushing strength exami-nation(n =1 0).Results:There was no significant difference in the microleakage among the 4 groups.SEMobservation showed that the resin tags of group A were long and dense and the resin tags of group B were short and sparse,bubbles and cracks were found on the local site in group A and B.The resin tags of group C were long and thin,but combined with tooth tightly;the resin tags of group D were short and dense;the penetration was poor at the bottom of the fissures in the 4 groups.The shear bond strength of Group A was the highest(P <0.01 ),that of group C was higher than that of group B and D(P <0.05).There was no significantly difference between group B and D(P >0.05).The compressive strength of flowable resin groups was higher than that of fissure seal-ant group(P <0.05).Conclusion:The shear bond strength and compressive strength of all-etching bonding system combined with flowable resin is superior to that of self-etching bonding system combined with flowable resin and the traditional sealant.Using Prime&Bond NT bond after acid etching may improve the shear bonding strength.