Er:YAG激光對根管內(nèi)糞腸球菌和玷污層的清理效果
發(fā)布時間：2019-05-18 09:02
【摘要】：目的:研究Er:YAG激光對根管內(nèi)糞腸球菌和玷污層的清理效果。方法:將人離體單根管牙滅菌后接種糞腸球菌,隨機(jī)分為2組:一組機(jī)械預(yù)備時聯(lián)合生理鹽水沖洗;另一組機(jī)械預(yù)備時聯(lián)合NaClO沖洗。預(yù)備后兩組再各自分為3個亞組:兩組分別直接取樣;兩組分別經(jīng)Er:YAG激光照射后取樣;兩組分別經(jīng)Ca(OH)_2封藥7 d后取樣。比較各組處理前后細(xì)菌減少率,以掃描電鏡觀察處理后各組根管內(nèi)表面及牙本質(zhì)小管。結(jié)果:Er:YAG激光處理組細(xì)菌減少率高于僅NaClO沖洗、Ca(OH)_2封藥組(P0.05);但激光照射組使用生理鹽水或NaClO沖洗殺菌率比較差異無統(tǒng)計學(xué)意義(P0.05)。激光照射處理后根管內(nèi)表面玷污層明顯減少,牙本質(zhì)小管口開放。結(jié)論:在根管機(jī)械預(yù)備后,使用Er:YAG激光照射對根管的清理效果優(yōu)于僅使用NaClO沖洗和Ca(OH)_2封藥,且清理效果與照射時使用的沖洗劑無關(guān)。提示Er:YAG激光可單獨應(yīng)用于根管內(nèi)消毒。
[Abstract]:Objective: to study the effect of Er:YAG laser on Enterococcus faecalis and smear layer in root canal. Methods: Enterococcus faecalis was inoculated with isolated single tube teeth and randomly divided into two groups: one group was washed with saline during mechanical preparation and the other group was washed with NaClO during mechanical preparation. After preparation, the two groups were divided into three groups: the two groups were directly sampled, the two groups were irradiated by Er:YAG laser, and the two groups were sampled after 7 days of Ca (OH) _ 2. The bacterial reduction rate before and after treatment was compared, and the inner surface of root canal and dentin tubule were observed by scanning electron microscope (SEM). Results: the bacterial reduction rate of Er:YAG laser treatment group was higher than that of NaClO flushing, Ca (OH) _ 2 group (P 0.05), but there was no significant difference in the bactericidal rate of normal saline or NaClO flushing in laser irradiation group (P 0.05). After laser irradiation, the smear layer on the inner surface of root canal was significantly reduced and the orifice of dentin tubule was open. Conclusion: after root canal mechanical preparation, the cleaning effect of Er:YAG laser irradiation on root canal is better than that of NaClO washing and Ca (OH) _ 2 alone, and the cleaning effect is not related to the washing agent used during irradiation. It is suggested that Er:YAG laser can be used in root canal disinfection alone.
【作者單位】： 中南大學(xué)湘雅醫(yī)院口腔醫(yī)學(xué)中心;
【分類號】：R781.05
，
本文編號：2479868
[Abstract]:Objective: to study the effect of Er:YAG laser on Enterococcus faecalis and smear layer in root canal. Methods: Enterococcus faecalis was inoculated with isolated single tube teeth and randomly divided into two groups: one group was washed with saline during mechanical preparation and the other group was washed with NaClO during mechanical preparation. After preparation, the two groups were divided into three groups: the two groups were directly sampled, the two groups were irradiated by Er:YAG laser, and the two groups were sampled after 7 days of Ca (OH) _ 2. The bacterial reduction rate before and after treatment was compared, and the inner surface of root canal and dentin tubule were observed by scanning electron microscope (SEM). Results: the bacterial reduction rate of Er:YAG laser treatment group was higher than that of NaClO flushing, Ca (OH) _ 2 group (P 0.05), but there was no significant difference in the bactericidal rate of normal saline or NaClO flushing in laser irradiation group (P 0.05). After laser irradiation, the smear layer on the inner surface of root canal was significantly reduced and the orifice of dentin tubule was open. Conclusion: after root canal mechanical preparation, the cleaning effect of Er:YAG laser irradiation on root canal is better than that of NaClO washing and Ca (OH) _ 2 alone, and the cleaning effect is not related to the washing agent used during irradiation. It is suggested that Er:YAG laser can be used in root canal disinfection alone.
【作者單位】： 中南大學(xué)湘雅醫(yī)院口腔醫(yī)學(xué)中心;
【分類號】：R781.05
，
本文編號：2479868
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