牙体牙髓牙周病学杂志
牙體牙髓牙週病學雜誌
아체아수아주병학잡지
CHINESE JOURNAL OF CONSERVATIVE DENTISTRY
2014年
8期
459-465
,共7页
磷酸%EDTA%玷污层%树脂型封闭剂%结合作用
燐痠%EDTA%玷汙層%樹脂型封閉劑%結閤作用
린산%EDTA%점오층%수지형봉폐제%결합작용
phosphoric acid%EDTA%smear layer%resin sealer%bonding effect
目的：探讨不同处理方法对树脂型封闭剂与根管壁结合效果的影响。方法：取64个离体单根管前磨牙，常规根管预备后随机分为P1、P2、P3、E1、E2、E3（n＝10）和C 组（空白对照，n＝4），P1～P3组分别用350 g/L磷酸液处理5、10、15 s，E1～E3组分别用170 g/L EDTA液处理30、60、90 s，C组用蒸馏水处理90 s。然后每个实验组各随机抽取8个样本，空白对照组抽取2个样本，沿颊舌向纵行劈开各牙根，扫描电镜观察根管壁玷污层去除情况并分级评估；剩余的14个样本以LuxaCore-Dual作为根管封闭剂，采用单牙胶尖充填法进行根管充填，37℃下放置7 d后将各牙根横截成颈、中、根尖3部分，扫描电镜下观察结合界面。结果：玷污层分值比较，P3组明显低于P1、P2和C组（P＜0．05），E2、E3组明显低于E1和C组（P＜0．05），P3、E2组和E3组无明显差异（P＞0．05）；根管上2/3均明显低于根尖部（P＜0．05），而根颈部和根中部无显著性差异（P＞0．05）；充填后结合界面观察显示，P3、E2、E3组均形成密集的长树脂突和均一的混合层，根颈部尤其明显，E2、E3组要稍好于P3组，其他各组所形成的树脂突均短而少，未见明显的混合层。结论：经170 g/L EDTA液处理达60 s后的根管壁与树脂型封闭剂的结合效果最好，根尖部的结合效果较差。
目的：探討不同處理方法對樹脂型封閉劑與根管壁結閤效果的影響。方法：取64箇離體單根管前磨牙，常規根管預備後隨機分為P1、P2、P3、E1、E2、E3（n＝10）和C 組（空白對照，n＝4），P1～P3組分彆用350 g/L燐痠液處理5、10、15 s，E1～E3組分彆用170 g/L EDTA液處理30、60、90 s，C組用蒸餾水處理90 s。然後每箇實驗組各隨機抽取8箇樣本，空白對照組抽取2箇樣本，沿頰舌嚮縱行劈開各牙根，掃描電鏡觀察根管壁玷汙層去除情況併分級評估；剩餘的14箇樣本以LuxaCore-Dual作為根管封閉劑，採用單牙膠尖充填法進行根管充填，37℃下放置7 d後將各牙根橫截成頸、中、根尖3部分，掃描電鏡下觀察結閤界麵。結果：玷汙層分值比較，P3組明顯低于P1、P2和C組（P＜0．05），E2、E3組明顯低于E1和C組（P＜0．05），P3、E2組和E3組無明顯差異（P＞0．05）；根管上2/3均明顯低于根尖部（P＜0．05），而根頸部和根中部無顯著性差異（P＞0．05）；充填後結閤界麵觀察顯示，P3、E2、E3組均形成密集的長樹脂突和均一的混閤層，根頸部尤其明顯，E2、E3組要稍好于P3組，其他各組所形成的樹脂突均短而少，未見明顯的混閤層。結論：經170 g/L EDTA液處理達60 s後的根管壁與樹脂型封閉劑的結閤效果最好，根尖部的結閤效果較差。
목적：탐토불동처리방법대수지형봉폐제여근관벽결합효과적영향。방법：취64개리체단근관전마아，상규근관예비후수궤분위P1、P2、P3、E1、E2、E3（n＝10）화C 조（공백대조，n＝4），P1～P3조분별용350 g/L린산액처리5、10、15 s，E1～E3조분별용170 g/L EDTA액처리30、60、90 s，C조용증류수처리90 s。연후매개실험조각수궤추취8개양본，공백대조조추취2개양본，연협설향종행벽개각아근，소묘전경관찰근관벽점오층거제정황병분급평고；잉여적14개양본이LuxaCore-Dual작위근관봉폐제，채용단아효첨충전법진행근관충전，37℃하방치7 d후장각아근횡절성경、중、근첨3부분，소묘전경하관찰결합계면。결과：점오층분치비교，P3조명현저우P1、P2화C조（P＜0．05），E2、E3조명현저우E1화C조（P＜0．05），P3、E2조화E3조무명현차이（P＞0．05）；근관상2/3균명현저우근첨부（P＜0．05），이근경부화근중부무현저성차이（P＞0．05）；충전후결합계면관찰현시，P3、E2、E3조균형성밀집적장수지돌화균일적혼합층，근경부우기명현，E2、E3조요초호우P3조，기타각조소형성적수지돌균단이소，미견명현적혼합층。결론：경170 g/L EDTA액처리체60 s후적근관벽여수지형봉폐제적결합효과최호，근첨부적결합효과교차。
AIM:To study the bonding effect between resin sealer and root canal walls conditioned with dif-ferent treatments.METHODS:Canals of 64 single-rooted premolars were routinely prepared and then randomly divid-ed into 6 test groups(n=10)and 1 control group(n=4).The canals in group P1,P2,P3 were treated with 350 g/L phosphoric acid for 5,10 and 15 seconds respectively;those in group E1,E2 and E3 were treated with 170 g/L EDTA for 30 ,60 and 90 seconds respectively.Canals in group C were treated with distilled water for 90 seconds.8 speci-mens of each test group and 2 of control group were longitudinally sectioned in labio-lingual direction,then examined under SEM for the evaluation of smear layer removal.14 remaining specimens were obturated by a combination of Lux-aCore-Dual and gutta percha using a single cone technique.The roots were cross-sectioned into 3 parts (uper,middle and apex)and the bonding surface was examined under SEM.RESULTS:The value of smear layer in group P3 was lower than that in groups P1 and P2(P<0.05),in Groups E2 and E3 was lower than that in Group E1(P<0.05), and in all of test groups was lower than in control group(P<0.05).Group P3,E2 and E3 showed no statistical differ-ence(P>0.05).The apical portion showed higher value than cervical and middle portions(P<0.05),yet there was no statistical difference between the latter two(P>0.05 ).After obturation,many long resin tags and uniform hybrid layer were observed in group P3,E2 and E3,especially in the cervical part.However the bonding effect of EDTA groups was a little better than phosphoric acid groups.In other groups,fewer and short resin tags were found,with no hybrid layer formed.CONCLUSION:Conditioning of root canal with 170 g/L EDTA solution for 60s may produce most benefitial effects,but in the the apical portion the effect is less benefitial.
