背景:近年来,纤维桩和树脂核已经被广泛应用于修复已行根管治疗后的大面积牙体硬组织缺损,并取得了令人满意的效果。铒:钇铝石榴石激光(erbium:yttrium aluminum garnet laser,Er:YAG激光)是新型水动力激光系统,可以用于纤维桩的表面处...背景:近年来,纤维桩和树脂核已经被广泛应用于修复已行根管治疗后的大面积牙体硬组织缺损,并取得了令人满意的效果。铒:钇铝石榴石激光(erbium:yttrium aluminum garnet laser,Er:YAG激光)是新型水动力激光系统,可以用于纤维桩的表面处理。但是关于Er:YAG激光表面处理对纤维桩黏结强度影响的实验研究国内外鲜有报道。目的:探讨不同参数Er:YAG激光进行表面处理对玻璃纤维桩与不同部位根管牙本质黏结强度的影响。方法:选择50颗新鲜拔除根长相近的单根管上颌中切牙,常规根管治疗后去除牙冠,完成根桩牙体预备后,黏固Para Post FIBER LUX玻璃纤维桩至根管内。根据黏固前桩表面处理方法,将50颗离体牙随机等分为5组:对照组、1.5,2.5,3.5和4.5 W ER:YAG激光照射组。对照组未进行表面处理,1.5,2.5,3.5和4.5 W ER:YAG激光照射组纤维桩分别以150,250,350和450 m J,频率为10 Hz,脉冲持续频率为100μs的Er:YAG激光进行表面处理60 s。结果与结论:纤维桩与牙本质间黏结强度均值牙颈部最大,根中部次之,根尖部最小。牙颈部黏结强度与根中部和根尖部之间差异有显著性意义(P<0.05);根中部与根尖部之间差异无显著性意义(P>0.05)。相同根管部位的黏结强度值均表现为4.5 W ER:YAG激光照射组最高,且与其他组比差异有显著性意义(P<0.05)。说明用4.5 W Er:YAG桩表面处理可提高纤维桩与根管牙本质的黏结强度,且根颈部黏结强度大于根中及根尖部。展开更多
Tm3＋-doped 2-μm lasers benefit many applications such as atmospheric sensing, medical treatment, and spec- troscopy [1-3]. Therefore, in the past two decades, both continuous-wave （CW） and pulse operations have be...Tm3＋-doped 2-μm lasers benefit many applications such as atmospheric sensing, medical treatment, and spec- troscopy [1-3]. Therefore, in the past two decades, both continuous-wave （CW） and pulse operations have been widely researched in Tm3＋-doped bulk materials and fibers [4-7].展开更多
Chronic radiation proctopathy occurs in 5%-20% of patients following pelvic radiotherapy. Although many cases resolve spontaneously,some lead to chronic symptoms including diarrhea,tenesmus,urgency and persistent rect...Chronic radiation proctopathy occurs in 5%-20% of patients following pelvic radiotherapy. Although many cases resolve spontaneously,some lead to chronic symptoms including diarrhea,tenesmus,urgency and persistent rectal bleeding with iron deficiency anemia requiring blood transfusions. Treatments for chronic radiation proctitis remain unsatisfactory and the basis of evidence for various therapies is generally insuff icient. There are very few controlled or prospective trials,and comparisons between therapies are limited because of different evaluation methods. Medical treatments,including formalin,topical sucralfate,5-amino salicylic acid enemas,and short chain fatty acids have been used with limited success.Surgical management is associated with high morbidity and mortality. Endoscopic therapy using modalities such as the heater probe,neodymium:yttrium-aluminium-garnet laser,potassium titanyl phosphate laser and bipolar electrocoagulation has been reported to be of some benef it,but with frequent complications.Argon plasma coagulation is touted to be the preferred endoscopic therapy due to its eff icacy and safety profile.Newer methods of endoscopic ablation such as radiofrequency ablation and cryotherapy have been recently described which may afford broader areas of treatment per application,with lower rate of complications.This review will focus on endoscopic ablation therapies,including such newer modalities,for chronic radiation proctitis.展开更多
文摘背景:近年来,纤维桩和树脂核已经被广泛应用于修复已行根管治疗后的大面积牙体硬组织缺损,并取得了令人满意的效果。铒:钇铝石榴石激光(erbium:yttrium aluminum garnet laser,Er:YAG激光)是新型水动力激光系统,可以用于纤维桩的表面处理。但是关于Er:YAG激光表面处理对纤维桩黏结强度影响的实验研究国内外鲜有报道。目的:探讨不同参数Er:YAG激光进行表面处理对玻璃纤维桩与不同部位根管牙本质黏结强度的影响。方法:选择50颗新鲜拔除根长相近的单根管上颌中切牙,常规根管治疗后去除牙冠,完成根桩牙体预备后,黏固Para Post FIBER LUX玻璃纤维桩至根管内。根据黏固前桩表面处理方法,将50颗离体牙随机等分为5组:对照组、1.5,2.5,3.5和4.5 W ER:YAG激光照射组。对照组未进行表面处理,1.5,2.5,3.5和4.5 W ER:YAG激光照射组纤维桩分别以150,250,350和450 m J,频率为10 Hz,脉冲持续频率为100μs的Er:YAG激光进行表面处理60 s。结果与结论:纤维桩与牙本质间黏结强度均值牙颈部最大,根中部次之,根尖部最小。牙颈部黏结强度与根中部和根尖部之间差异有显著性意义(P<0.05);根中部与根尖部之间差异无显著性意义(P>0.05)。相同根管部位的黏结强度值均表现为4.5 W ER:YAG激光照射组最高,且与其他组比差异有显著性意义(P<0.05)。说明用4.5 W Er:YAG桩表面处理可提高纤维桩与根管牙本质的黏结强度,且根颈部黏结强度大于根中及根尖部。
基金supported by the National Key Research and Development Program of China(Grant No.2016YFB0701000)the Science and Technology Major Project of Fujian Province of China(Grant No.2014HZ0001-2)the Construction of Fujian Science and Technology Innovation Platform(Grant No.2014H2007)
文摘Tm3＋-doped 2-μm lasers benefit many applications such as atmospheric sensing, medical treatment, and spec- troscopy [1-3]. Therefore, in the past two decades, both continuous-wave （CW） and pulse operations have been widely researched in Tm3＋-doped bulk materials and fibers [4-7].
文摘Chronic radiation proctopathy occurs in 5%-20% of patients following pelvic radiotherapy. Although many cases resolve spontaneously,some lead to chronic symptoms including diarrhea,tenesmus,urgency and persistent rectal bleeding with iron deficiency anemia requiring blood transfusions. Treatments for chronic radiation proctitis remain unsatisfactory and the basis of evidence for various therapies is generally insuff icient. There are very few controlled or prospective trials,and comparisons between therapies are limited because of different evaluation methods. Medical treatments,including formalin,topical sucralfate,5-amino salicylic acid enemas,and short chain fatty acids have been used with limited success.Surgical management is associated with high morbidity and mortality. Endoscopic therapy using modalities such as the heater probe,neodymium:yttrium-aluminium-garnet laser,potassium titanyl phosphate laser and bipolar electrocoagulation has been reported to be of some benef it,but with frequent complications.Argon plasma coagulation is touted to be the preferred endoscopic therapy due to its eff icacy and safety profile.Newer methods of endoscopic ablation such as radiofrequency ablation and cryotherapy have been recently described which may afford broader areas of treatment per application,with lower rate of complications.This review will focus on endoscopic ablation therapies,including such newer modalities,for chronic radiation proctitis.
