目的 探讨iRoot BP Plus用于年轻恒牙活髓切断术的可靠性及对患牙美观度的影响.方法 选取2018年1月至2019年1月我院收治的76例行年轻恒牙活髓切断术的患者,随机将其分为研究组和对照组,各38例.对照组应用氢氧化钙类制剂封闭根管上段,研...目的 探讨iRoot BP Plus用于年轻恒牙活髓切断术的可靠性及对患牙美观度的影响.方法 选取2018年1月至2019年1月我院收治的76例行年轻恒牙活髓切断术的患者,随机将其分为研究组和对照组,各38例.对照组应用氢氧化钙类制剂封闭根管上段,研究组应用iRoot BP Plus封闭根管上段.比较两组术后患牙美观度及功能、手术情况、患牙填充效果.结果 术后6个月,两组咀嚼功能及语言功能评分无显著差异(P>0.05);研究组舒适功能、固定功能、美观程度评分均高于对照组(P<0.05).研究组的疼痛持续时间、肿胀持续时间及手术时间均短于对照组(P<0.05).研究组的患牙填充效果均优于对照组(P<0.05).结论 iRoot BP Plus在年轻恒牙活髓切断术中的应用效果理想,可降低患者疼痛程度,缩短手术时间,提高术后患牙美观度及功能,获得良好的填充效果.展开更多
The ameliorative effect of external Ca^2＋ on Jerusalem artichoke （Helianthus tuberosus L.） under salt stress was studied through biochemical and physiological analyses of Jerusalem artichoke seedlings treated with ...The ameliorative effect of external Ca^2＋ on Jerusalem artichoke （Helianthus tuberosus L.） under salt stress was studied through biochemical and physiological analyses of Jerusalem artichoke seedlings treated with or without 10 mol L^-1 CaCl2, 150 mmol L^-1 NaCl, and/or 5 mmol L^-1 ethylene-bis（oxyethylenenitrilo）-tetraacetic acid （EGTA） for five days. Exposure to NaC1 （150 mmol L^-1） decreased growth, leaf chlorophyll content, and photosynthetic rate of Jerusalem artichoke seedlings. NaC1 treatment showed 59% and 37% higher lipid peroxidation and electrolyte leakage, respectively, than the control. The activities of superoxide dismutase （SOD）, peroxidase （POD）, and catalase （CAT） were decreased by NaCl, indicating an impeded antioxidant defense mechanism of Jerusalem artichoke grown under salt stress. Addition of 10 mmol L^-1 CaCl2 to the salt solutions significantly decreased the damaging effect of NaC1 on growth and chlorophyll content and simultaneously restored the rate of photosynthesis almost to the level of the control. Ca^2＋ addition decreased the leaf malondialdehyde （MDA） content and electrolyte leakage from NaCl-treated seedlings by 47% and 24%, respectively, and significantly improved the activities of SOD, POD, and CAT in NaCl-treated plants. Addition of EGTA, a specific chelator of Ca2＋, decreased the growth, chlorophyll content, and photosynthesis, and increased level of MDA and electrolyte leakage from NaCl-treated plants and from the control plants. EGTA addition to the growth medium also repressed the activities of SOD, POD, and CAT in NaCl-treated and control seedlings. External Ca2＋ might protect Jerusalem artichoke against NaC1 stress by up-regulating the activities of antioxidant enzymes and thereby decreasing the oxidative stress.展开更多
文摘目的 探讨iRoot BP Plus用于年轻恒牙活髓切断术的可靠性及对患牙美观度的影响.方法 选取2018年1月至2019年1月我院收治的76例行年轻恒牙活髓切断术的患者,随机将其分为研究组和对照组,各38例.对照组应用氢氧化钙类制剂封闭根管上段,研究组应用iRoot BP Plus封闭根管上段.比较两组术后患牙美观度及功能、手术情况、患牙填充效果.结果 术后6个月,两组咀嚼功能及语言功能评分无显著差异(P>0.05);研究组舒适功能、固定功能、美观程度评分均高于对照组(P<0.05).研究组的疼痛持续时间、肿胀持续时间及手术时间均短于对照组(P<0.05).研究组的患牙填充效果均优于对照组(P<0.05).结论 iRoot BP Plus在年轻恒牙活髓切断术中的应用效果理想,可降低患者疼痛程度,缩短手术时间,提高术后患牙美观度及功能,获得良好的填充效果.
基金the National High Technology Research and Development Program of China (863 Program)(No. 2003AA627040).
文摘The ameliorative effect of external Ca^2＋ on Jerusalem artichoke （Helianthus tuberosus L.） under salt stress was studied through biochemical and physiological analyses of Jerusalem artichoke seedlings treated with or without 10 mol L^-1 CaCl2, 150 mmol L^-1 NaCl, and/or 5 mmol L^-1 ethylene-bis（oxyethylenenitrilo）-tetraacetic acid （EGTA） for five days. Exposure to NaC1 （150 mmol L^-1） decreased growth, leaf chlorophyll content, and photosynthetic rate of Jerusalem artichoke seedlings. NaC1 treatment showed 59% and 37% higher lipid peroxidation and electrolyte leakage, respectively, than the control. The activities of superoxide dismutase （SOD）, peroxidase （POD）, and catalase （CAT） were decreased by NaCl, indicating an impeded antioxidant defense mechanism of Jerusalem artichoke grown under salt stress. Addition of 10 mmol L^-1 CaCl2 to the salt solutions significantly decreased the damaging effect of NaC1 on growth and chlorophyll content and simultaneously restored the rate of photosynthesis almost to the level of the control. Ca^2＋ addition decreased the leaf malondialdehyde （MDA） content and electrolyte leakage from NaCl-treated seedlings by 47% and 24%, respectively, and significantly improved the activities of SOD, POD, and CAT in NaCl-treated plants. Addition of EGTA, a specific chelator of Ca2＋, decreased the growth, chlorophyll content, and photosynthesis, and increased level of MDA and electrolyte leakage from NaCl-treated plants and from the control plants. EGTA addition to the growth medium also repressed the activities of SOD, POD, and CAT in NaCl-treated and control seedlings. External Ca2＋ might protect Jerusalem artichoke against NaC1 stress by up-regulating the activities of antioxidant enzymes and thereby decreasing the oxidative stress.
