钴铬合金及银钯合金烤瓷冠对牙周组织的影响

背景：金属烤瓷全冠是修复牙体缺损的最常用方法,牙周问题是导致修复失败的最常见原因。 目的：评价钴铬合金和银钯合金作为烤瓷冠内冠材料对牙周组织的影响。 方法：选择采用钴铬合金和银钯合金烤瓷冠修复患者75例,189颗患牙,其中106颗采用钯合金烤瓷冠修复体,83颗应用钴铬合金修复体。于修复前后临床对比患牙龈沟出血指数、龈沟液量、龈沟液中与炎症相关的细胞因子白细胞介素1β和肿瘤坏死因子α浓度,以及龈沟液中牙龈卟啉单胞菌、伴放线嗜血杆菌、福赛斯坦纳菌等3种细菌检出率的变化。 结果与结论：①与修复前比较,钴铬合金烤瓷冠修复12个月后,患牙龈沟出血指数和龈沟液量、龈沟液中细胞因子白细胞介素1β、肿瘤坏死因子α水平及龈沟液中牙龈卟啉单胞菌、福赛斯坦纳菌检出率升高(P < 0.05或P﹤0.01),伴放线嗜血杆菌检出率无明显变化(P > 0.05)。②与修复前比较,银钯合金烤瓷冠修复12个月后,龈沟出血指数和龈沟液量升高(P < 0.05),龈沟液中细胞因子白细胞介素1β、肿瘤坏死因子α水平及3种细菌检出率无明显变化(P > 0.05)。表明两种材料的烤瓷冠对患牙牙周组织均有影响,其中银钯合金影响较小,钴铬合金影响较大。     

草酸钙晶体刺激下人巨噬细胞高迁移率族蛋白B1的表达

背景：研究发现在肾结石模型中肾间质晶体周围存在大量单核/巨噬细胞浸润,显示巨噬细胞可能参与晶体在肾脏中的沉积过程,而巨噬细胞是人体重要的固有免疫细胞,在肾脏中沉积的大量的单核/巨噬细胞吞噬晶体,会产生一些炎症因子损伤和破坏肾小管上皮细胞,最终有利于结石的形成。目的：探讨一水草酸钙晶体刺激人巨噬细胞后高迁移率族蛋白B1的表达水平。方法：用100 mg/L的一水草酸钙刺激巨噬细胞,分别于刺激后0,6,12,24和36 h,用Western blot检测细胞总蛋白和细胞浆内高迁移率族蛋白B1的含量;用实时荧光定量PCR,检测细胞中高迁移率族蛋白B1 mRNA表达情况;分别于一水草酸钙刺激后0,1,2和4 h,用酶联免疫吸附实验测定细胞培养液上清中肿瘤坏死因子α和白细胞介素6的水平。结果与结论：一水草酸钙刺激后0-6 h细胞浆内高迁移率族蛋白B1的含量较低,刺激后12-36 h细胞浆内高迁移率族蛋白B1逐渐增加。一水草酸钙刺激后0-6 h,巨噬细胞总蛋白中高迁移率族蛋白B1含量不高,在刺激后12 h细胞总蛋白高迁移率族蛋白B1的含量开始增加,并且在刺激后24-36 h保持在较高水平。RT-PCR结果显示,一水草酸钙刺激后0-12 h,培养细胞中高迁移率族蛋白B1的mRNA表达量无明显变化,刺激后18-24 h培养细胞中高迁移率族蛋白B1的mRNA表达量明显增加。ELISA结果显示,一水草酸钙刺激后2 h,细胞培养液上清中肿瘤坏死因子α和白细胞介素6表达和释放增加,4 h达到明显高峰。结果表明,一水草酸钙可以诱导人巨噬细胞高迁移率族蛋白B1的表达及mRNA表达增加;诱导人巨噬细胞内肿瘤坏死因子α和白细胞介素6的表达增加,且高迁移率族蛋白B1表达的时间明显晚于肿瘤坏死因子a和白细胞介素6的释放时间。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程全文链接：     

ST段抬高性AMI患者血浆高迁移率族蛋白B1浓度的变化

目的:揭示ST段抬高性急性心肌梗死(STEAMI)患者血浆高迁移率族蛋白B1浓度的变化,探讨其临床意义。方法:收集STEAMI患者110例、健康体检者50例(作为对照组)。对照组静脉血体检时获得。STEAMI患者静脉血在入院时、入院后第1、2、3、5和7d获得。ELISA测定血浆高迁移率族蛋白B1浓度。结果:STEAMI患者住院期间主要不良心脏事件发生30例(27.3%)。STEAMI患者血浆高迁移率族蛋白B1浓度显著升高,1d内到达高峰,后逐渐下降,均显著地高于对照组(P<0.01)。在各个时间点,住院期间主要不良心脏事件发生患者血浆高迁移率族蛋白B1浓度均显著高于住院期间主要不良心脏事件不发生患者(P<0.05)。ROC曲线显示血浆高迁移率族蛋白B1浓度预测住院期间主要不良心脏事件发生有显著意义(曲线下面积=0.836,95%CI=0.776～0.873,P<0.01),且判定入院时血浆高迁移率族蛋白B1浓度>13.6 ng/ml,对预测住院期间主要不良心脏事件发生有80.0%的灵敏度和75.0%的特异度。结论:STEAMI患者血浆高迁移率族蛋白B1浓度显著升高,临床检测这个指标有助于早期判断STEAMI患者住院期间主要不良心脏事件的发生。     

不同角度机械力刺激后犬种植体周围龈沟液中骨保护素的表达

背景:由于局部解剖结构的限制,临床上往往采用15°-30°角度基台进行种植义齿修复,在受到过大角度机械力损伤的条件下,种植体周围组织界面的结构特点决定了其抵御口腔环境中病原微生物侵袭的能力较天然牙差。目的:研究犬下颌骨种植体受到0°和30°角100 N持续机械力作用后,种植体周围龈沟液中核因子κB受体活化因子配体和骨保护素水平的改变。方法:将6只杂种犬随机均分为3组,拔除双侧下颌第二前磨牙,每侧植入2颗牙种植体,3个月后行钴铬烤瓷冠修复,修复1周后其中2组分别施以0°角100 N、30°角100 N机械力,每次5 s,共10 min;对照组未受机械力作用。机械力作用24 h、72 h、1周后,获取各组种植体周围龈沟液样本,应用ELISA方法检测样本中核因子κB受体活化因子配体和骨保护素的水平。结果与结论:随时间的延长,0°角100 N组、30°角100 N组种植体周围龈沟液核因子κB受体活化因子配体水平均逐渐升高,均高于对照组(P0.05,P0.01),并且30°角100 N组增加更明显;至1周时稍降低,但仍高于对照组(P0.05,P0.01)。随时间的延长,0°角100 N组、30°角100 N组种植体周围龈沟液骨保护素水平均逐渐降低,均低于对照组,但仅30°角100 N力组与对照组比较差异有显著性意义(P0.05);至1周时稍升高,但还是低于对照组,30°角100 N力组与对照组比较差异有显著性意义(P0.05)。说明当种植义齿受到30°角100 N连续机械力作用后,种植体周围龈沟液中可检测到破骨活动增强,建议临床上种植义齿的牙合力尽量与种植体植入的方向一致。     

脑出血患者血浆高迁移率族蛋白B1浓度的检测及临床意义

目的:揭示脑出血患者血浆高迁移率族蛋白B1浓度的变化,探讨其对预后的预测价值。方法:收集高血压性基底节区出血患者作为脑出血组,共98例。收集同期健康体检人群作为对照组,共40例。脑出血组静脉血在入院时获得。对照组静脉血体检时获得。ELISA检测血浆高迁移率族蛋白B1浓度。统计分析其与患者预后的相关性。结果:脑出血后1个月内死亡29例(29.6%)。t检验显示,脑出血组血浆高迁移率族蛋白B1浓度(7.6±2.7)ng/ml显著高于对照组(1.3±0.4)ng/ml(P<0.001)。多因素分析显示,血浆高迁移率族蛋白B1浓度与脑出血患者入院时GCS评分呈显著负相关(P<0.001),是脑出血1个月内死亡的独立危险因素(OR=1.384,95%CI=1.114～1.551,P<0.01)。ROC曲线分析显示,血浆高迁移率族蛋白B1浓度预测脑出血1个月内死亡有显著预测价值(曲线下面积=0.823,95%CI=0.759～0.892,P<0.001),且判定血浆高迁移率族蛋白B1浓度7.9ng/ml,对预测脑出血1个月内死亡有86.2%的灵敏度和79.7%的特异度。结论:脑出血后血浆高迁移率族蛋白B1浓度升高,临床检测这个指标有助于早期判断脑出血患者的预后。     

高迁移率族蛋白B1在肾脏冷缺血再灌注损伤中的作用

背景：缺血再灌注损伤是临床器官移植不可避免的病理生理过程,冷缺血再灌注损伤具有研究肾移植更强的针对性。 目的：观察高迁移率族蛋白B1在大鼠肾脏冷缺血再灌注损伤中的作用。 方法：将SD大鼠随机分为假手术组、冷缺血再灌注组、丙酮酸乙酯(可显著抑制高迁移率族蛋白B1的合成与释放)治疗组。冷缺血再灌注组和丙酮酸乙酯治疗组制冷缺血再灌注模型前分别经阴茎背静脉注射林格液与丙酮酸乙酯,假手术组将腹腔打开后经阴茎背静脉注射林格液,45 min后关闭腹腔。 结果与结论：冷缺血再灌注组和丙酮酸乙酯治疗组各时间点肌酐、高迁移率族蛋白B1、肿瘤坏死因子α、核因子κB水平均显著高于假手术组(P < 0.01),其中冷缺血再灌注组上述指标高于丙酮酸乙酯治疗组(P < 0.01)。表明高迁移率族蛋白参与了肾移植冷缺血再灌注的病理过程,丙酮酸乙酯能够减轻肾脏冷缺血再灌注损伤。     

高迁移率族蛋白B1对磷酸钙诱导巨噬细胞释放炎症因子的协同作用

背景：研究表明,巨噬细胞及其炎症反应参与了肾结石的发生发展。前期实验发现结石晶体可刺激巨噬细胞释放高迁移率族蛋白B1。 目的：观察高迁移率族蛋白B1对磷酸钙诱导巨噬细胞释放白细胞介素1β、白细胞介素6、肿瘤坏死因子α、单核细胞趋化因子1的协同作用。 方法：实验分两部分：①将成功诱导为巨噬细胞的U937细胞分为空白组、100 mg/L磷酸钙组、100 μg/L高迁移率族蛋白B1组、100 mg/L磷酸钙+100 μg/L高迁移率族蛋白B1组,干预1,2,4 h后收集细胞上清液。②将已成功诱导为巨噬细胞的U937细胞分为100 mg/L磷酸钙组、磷酸钙+10 μg/L高迁移率族蛋白B1组、磷酸钙+50 μg/L高迁移率族蛋白B1组、磷酸钙+100 μg/L高迁移率族蛋白B1组,干预4 h后收集细胞上清液。Elisa法检测白细胞介素1β、白细胞介素6、肿瘤坏死因子α、单核细胞趋化因子1水平。 结果与结论：ELISA结果显示,磷酸钙组,100 μg/L高迁移率族蛋白B1组上清液白细胞介素1β、白细胞介素6、肿瘤坏死因子α、单核细胞趋化因子1质量浓度均高于空白组,磷酸钙+100 μg/L高迁移率族蛋白B1组上清液上述因子质量浓度均显著高于其他3组(P < 0.05),且呈时间依赖性。不同质量浓度高迁移率族蛋白B1+磷酸钙组细胞上清液白细胞介素1β、白细胞介素6、肿瘤坏死因子α、单核细胞趋化因子1水平均显著高于磷酸钙组(P < 0.05),且呈浓度依赖性。结果表明,磷酸钙及高迁移率族蛋白B1均可诱导巨噬细胞释放白细胞介素1β、白细胞介素6、肿瘤坏死因子α、单核细胞趋化因子1;高迁移率族蛋白B1可协同磷酸钙诱导巨噬细胞释放白细胞介素1β、白细胞介素6、肿瘤坏死因子α、单核细胞趋化因子1。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程全文链接：     

瘢痕疙瘩及正常皮肤中骨形态发生蛋白7、Gremlin、血管内皮生长因子、高迁移率族蛋白B1的表达

背景:瘢痕疙瘩的发生是创伤修复的纤维化过程,多种纤维化相关细胞因子参与其发生发展。骨形态发生蛋白7、Gremlin与高迁移率族蛋白B1在其他器官纤维化中发挥重要作用,而在瘢痕疙瘩组织中的研究少见报道。目的:分析骨形态发生蛋白7、Gremlin(骨形成蛋白拮抗剂家族成员)、血管内皮生长因子与高迁移率族蛋白B1在瘢痕疙瘩发病机制中的作用和意义。方法:采用免疫组织化学方法及Wsetern Blot法检测骨形态发生蛋白7、Gremlin、血管内皮生长因子与高迁移率族蛋白B1在20例瘢痕疙瘩组织和20例正常皮肤组织中的分布及蛋白水平的表达,并对瘢痕疙瘩组织中骨形态发生蛋白7与Gremlin、血管内皮生长因子与高迁移率族蛋白B1的表达情况进行相关性分析。结果与结论:与正常皮肤组织相比,Gremlin、血管内皮生长因子与高迁移率族蛋白B1在瘢痕疙瘩组织中表达呈显著性上调(P0.01),而骨形态发生蛋白7的表达呈显著性下调(P0.01),Gremlin与骨形态发生蛋白7在瘢痕疙瘩中的表达呈显著性负相关(r=-0.539,P0.05)。血管内皮生长因子与高迁移率族蛋白B1在瘢痕疙瘩中的表达呈显著性正相关(r=0.560,P0.05)。说明Gremlin的过度表达和骨形态发生蛋白7的表达下调,以及高迁移率族蛋白B1与血管内皮生长因子的高表达可能共同参与了瘢痕疙瘩的纤维化病理过程。     

辣椒素诱导人骨肉瘤细胞MG-63发生免疫原性细胞死亡

目的探讨辣椒素与顺铂能否抑制人骨肉瘤细胞MG-63增殖并诱导其免疫原性死亡(ICD)。方法 MTT检测细胞的增殖;线粒体膜电位分析细胞凋亡;流式细胞计量术检测细胞膜上钙网蛋白(CRT)表达量;荧光素酶法检测细胞外ATP的释放;ELISA检测细胞上清中高迁移率族蛋白1(HMGB1)的分泌。结果辣椒素及顺铂作用均能抑制细胞MG-63增殖(P0.01),且呈剂量依赖性;辣椒素和顺铂均可诱导MG-63细胞凋亡(P0.01),但只有辣椒素能诱导MG-63细胞内质网中CRT转移到细胞膜表面,且促进ATP及HMGB1的释放(P0.01)。结论辣椒素可诱导人骨肉瘤细胞凋亡及免疫原性死亡。     

低能量激光治疗对临床患者种植体周围炎的疗效研究

目的 实验采用基础治疗结合低能量激光照射疗法对种植体周围炎患者进行治疗,旨在阐明激光在临床治疗过程中的作用。 方法 选择天津市第一中心医院口腔科2017年9月至2018年3月诊断为早期种植体周围炎的患者38例(50枚种植体),随机分为激光治疗组和常规治疗对照组,每组各25枚种植体。对照组种植体接受基础治疗。激光治疗组种植体在接受对照组治疗的基础上联合使用低能量激光(808 nm GaAlAs半导体连续激光,输出功率80 mW、能量密度为4 J/cm2、光斑面积0.28 cm2,每个种植体龈袋内照射时间15 s)进行照射治疗。分别在治疗前及治疗后第2、8周检查两组种植体牙龈指数(GI)、菌斑指数(PLI)、龈沟出血指数(SBI)和探诊深度(PD)。 结果 两组治疗后2周与8周时的各项指标较其基线均有改善,其差异均有统计学意义(P<0.05)。与对照组相比,治疗后2周治疗组GI显著降低(P=0.018);治疗后8周治疗组GI、PD、SBI显著降低(P值分别为P<0.001,P=0.018,P<0.001)。 结论 在能量密度4 J/cm2下,波长808 nm的低能量激光照射可加速基础治疗后种植体周围炎的组织愈合。     

不同牙种植体系统对种植体周围骨组织吸收的影响

BACKGROUND: The peri-implant bone absorption is closely related to the repair effect. OBJECTIVE: To compare the effects of three kinds of dental implant systems on the peri-implant bone absorption. METHODS: 116 patients who underwent the dental implant systems were collected, including 46 cases with 3I implant system, 40 cases with ITI implant system and 30 cases with BLB implant system. The peri-implant bone absorption, sulcus bleeding index and periodontal probing depth of three groups were detected at 1, 3, 6, 9 and 12 months after implantation, respectively. RESULTS AND CONCLUSION: The peri-implant bone absorption of three groups within 1 year after implantation was in a rise, and the bone absorption of BLB group was significantly higher than that of ITI and 3I groups at 3 and 12 months after implantation (P < 0.05). Compared with the natural teeth, the gingival sulcus bleeding index of three groups were all increased at different time points after implantation; the gingival sulcus bleeding index of BLB group was significantly higher than that of natural teeth at 6 months after implantation (P < 0.05); the gingival sulcus bleeding index of three groups were significantly higher than that of natural teeth at 9 months after implantation (P < 0.05). The periodontal probing depth of three groups showed an ascending trend at 6 months after implantation; the periodontal probing depth of three groups was higher than that of natural teeth at different time points after implantation, which exhibited significant differences at 6 and 9 months after implantation (P < 0.05). In conclusion, three kinds of dental implant systems exhibit differet effects on the peri-implant bone absorption, but all achieve excellent clinical efficacies.     

纳米羟基磷灰石复合树脂材料细胞毒性及在牙体缺损修复中的应用

BACKGROUND: It has been found that the compressive strength and flexural strength of nano- hydroxyapatite combined with light-cured resin matrix can neet the requirements of dental restorative materials. OBJECTIVE: To detect the cytotoxicity of nano-hydroxyapatite/composite resin, and to analyze its effects on the dental restoration. METHODS: In vitro test: passage 5 periodontal ligament fibroblast-like cells and L-929 cells suspensions were cultured in the 10%, 50%, 100% of nano-hydroxyapatite/composite resin extracts, respectively, and fresh maintenance medium functioned as negative control group. Absorbance values were detected within 7-day culture. In vivo repair test: 57 cases with tooth defect were enrolled containing 37 males and 20 females aged from 15 to 31 years old, and all were subjected to nano-hydroxyapatite/composite resin treatment. A 3-year follow-up was undergone to detect the completeness, marginal adaptation and color matching of the restoration, as well as the periodontal probing depth, sulcus bleeding index, tooth mobility, dental plaque index, gingival crevicular fluid and aspartate aminotransferase level. RESULTS AND CONCLUSION: In vitro test results showed that the different concentrations of nano- hydroxyapatite/composite resin extracts had no effects on both periodontal ligament fibroblast-like cells and L-929 cells. In vivo repair test results found that after 3 years of follow-up, the periodontal probing depth, sulcus bleeding index, tooth mobility, dental plaque index, gingival crevicular fluid and aspartate aminotransferase level of patients were significantly decreased than those before repair (P < 0.05), but the alkaline phosphatase level revealed no significant change (P > 0.05). Unfortunately, three cases with incomplete restoration, four cases with color mismatching, and three cases with the inadaptable edge occurred. To conclude, the nano-hydroxyapatite/composite resin holds good biocompatibility and no cytotoxicity, which can maintain a good periodontal health condition in the dental restoration.     

牙周基础治疗对糖尿病患者血清和龈沟液中肿瘤坏死因子-α的影响

目的 观察牙周基础治疗对2型糖尿病伴牙周炎患者血清及龈沟液中肿瘤坏死因子-α(TNF-α)的浓度、临床牙周状态、血糖控制的影响.方法 选取2型糖尿病伴牙周炎患者60例,随机分做牙周基础治疗组(观察组)和不做牙周基础治疗组(对照组),每组各30人.分别在治疗前、治疗后1个月和3个月记录所有患者牙周临床指数:探诊深度(PD),附着丧失(AL)及菌斑指数(PLI),并检测糖化血红蛋白(HbAlc)及血清及龈沟液中TNF-α的含量.结果 观察组中PD、PLI和龈沟液中TNF-α含量在治疗后1个月和3个月时均显著降低(P＜0.05),AL和血清中HbAlc及TNF-α含量仅在治疗后3个月显著降低(P＜0.05).对照组的PD,AL,PLI,HbAlc,龈沟液及血清中TNF-α的差异无统计学意义(P＞0.05).结论 牙周基础治疗有助于2型糖尿病伴牙周炎患者的血糖控制,牙周状态改变和血清及龈沟液中TNF-α含量下降.     

CAD/CAM氧化锆全瓷冠修复对牙周组织的影响

背景：全冠修复体远期疗效的维持很大程度上取决于牙周组织的健康状况。 目的：探讨CAD/CAM氧化锆全瓷冠修复体对牙周组织健康状况的影响。 方法：随机选择需行全冠修复的55例患者64颗基牙作为研究对象,实验组为CAD/CAM氧化锆全瓷冠修复的29例患者32颗基牙,对照组为进行镍铬合金烤瓷冠修复的26例患者32颗基牙。检测两组修复前和修复后12个月的龈沟液含量、肿瘤坏死因子α和白细胞介素6水平,以及牙龈出血指数、牙周探诊深度、菌斑指数及附着丧失。 结果与结论：实验组修复前后各指标比较差异均无显著性意义(P > 0.05)。对照组修复12个月后的龈沟液含量、肿瘤坏死因子α、白细胞介素6、牙龈出血指数、牙周探诊深度及菌斑指数均高于修复前(P > 0.05)。修复12个月后,实验组龈沟液含量、肿瘤坏死因子α、白细胞介素6、牙龈出血指数、牙周探诊深度及菌斑指数均低于对照组(P < 0.05)。表明CAD/CAM氧化锆全瓷冠修复后对牙周组织健康基本无不良影响。中国组织工程研究杂志出版内容重点：生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程全文链接：     

The relationship between periodontal status and alkaline phosphatase levels in gingival crevicular fluid in men with hypergonadotropic hypogonadism

PURPOSE: The aim of this preliminary study was to determine the possible relationship between alkaline phosphatase (ALP) levels in the gingival crevicular fluid (GCF) and periodontal disease in men with hypergonadotropic hypogonadism (HH). MATERIALS AND METHODS: A total of 41 patients were divided into four groups. 9 with HH and periodontitis (P/HH), 11 with HH and gingivitis (G/HH), 12 with systemically healthy and periodontally healthy (H/C) and 9 with systemically healthy and periodontitis (P/C). The clinical evaluation of patients was based on the following parameters; the plaque index (PI), gingival index (GI), probing depths (PD) and attachment level (AL). The levels of ALP in the GCF were measured by enzyme-linked immunosorbent assay (ELISA). RESULTS: No significant difference could be detected in the mean clinical parameter data between the P/HH and P/C groups (p > 0.05). The periodontitis patients in both groups (P/C and P/HH) had higher mean probing depths than the H/C and G/HH patients (p < 0.001). The concentrations and total amounts of ALP in the GCF were significantly higher in both periodontitis groups compared to healthy and gingivitis groups (p < 0.01). The serum ALP levels were significantly higher in the P/HH group when compared to the other groups (p < 0.001). CONCLUSION: The findings of this study suggested that HH could be implicated as a contributing factor to the progress of periodontal disease.     

Host Modulation in Rheumatoid Arthritis Patients with TNF Blockers Significantly Decreases Biochemical Parameters in Periodontitis

The aim of this study was to evaluate the effects of host modulation therapy on periodontal and biochemical parameters. Sixteen rheumatoid arthritis patients newly scheduled for anti-tumour necrosis factor (TNF) therapy were screened for 30 days. Periodontal parameters (clinical attachment level, probing pocket depth, bleeding on probing, plaque index and gingival index) as well as salivary and gingival crevicular fluid (GCF), interleukin (IL)-1β, IL-8 and monocyte chemoattractant protein-1 (MCP-1) levels of the patients were evaluated at baseline and on the 30th day of therapy. GCF volume, IL-1β and IL-8 levels (p?=?0.007, p?=?0.017 and p?=?0.009, respectively) of the periodontitis patients significantly decreased. Although there was a decrease in all these parameters in healthy patients, it was below statistical significance. Salivary IL-8 and MCP-1 levels significantly decreased in periodontitis patients (p?=?0.028 and p?=?0.013, respectively), but IL-1β levels remained unchanged. These results suggest that TNF blockers may significantly modify host response in terms of biochemical parameters of the periodontium and may mask significant associations such as those reported between periodontitis and rheumatoid arthritis.     

角度基台修复后牙种植义齿的短期评价

背景：随着口腔种植修复技术的快速发展与适应证的不断扩大,角度基台的应用逐渐增多,后牙区作为口腔咬合的负重区,种植体承载的颌力大,对后牙区角度基台的评价具有更现实的临床指导意义。 目的：评价角度基台在后牙区种植义齿的短期临床效果。 方法：选择2008年1月至2013年1月来诊接受后牙区种植的114例患者,共植入175颗ITI种植体并完成单冠修复。根据基台的应用分为角度基台组与直基台组。测量两组修复后6个月、2年种植义齿牙周探诊深度、改良菌斑指数、改良龈沟出血指数与种植体周围年均骨吸收量,采用寿命表法计算两组种植义齿的5年累积存留率。 结果与结论：直基台与角度基台的种植义齿在牙周探诊深度、改良菌斑指数、改良龈沟出血指数方面比较差异均无显著性意义(P > 0.05)。种植体周围年均骨吸收量差异也均无显著性意义(P > 0.05)。15°与20°角度基台的5年累积存留率为95.6%,直基台的5年累积存留率为96.4%。结果显示种植义齿的基台角度与种植体周围软组织健康及骨吸收程度无相关性,15°与20°的角度基台在后牙区种植义齿可以取得较好的临床修复效果,长期效果有待于进一步观察。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程全文链接：     

Adjunctive low-dose doxycycline therapy effect on clinical parameters and gingival crevicular fluid tissue plasminogen activator levels in chronic periodontitis

Objective and design: The present study examined effectiveness of low-dose doxycycline (LDD) in combination with nonsurgical therapy on gingival crevicular fluid (GCF) tissue plasminogen activator (t-PA) levels and clinical parameters in chronic periodontitis (CP) a over 12-month period. Methods: GCF samples were collected, probing depth (PD), clinical attachment level (CAL), gingival index (GI) and plaque index were recorded at baseline, 3, 6, 9 and 12 months. CP patients (n = 65) were randomized to LDD or placebo groups. LDD group received LDD (20 mg) b.i.d for 3-months plus and root planing (SRP), while placebo group was given placebo capsules b.i.d for 3-months plus SRP. GCF t-PA levels were determined by ELISA. Friedman, Wilcoxon and Mann-Whitney test was used for statistical analysis. Results: Significant improvement was observed in all clinical parameters in both groups over 12-month period (p < 0.01). LDD group had lower PD, CAL and GI scores than placebo group at 6, 9 and 12-months (p < 0.05). GCF t-PA levels reduced in both groups over 12-month period (p < 0.01). LDD group had lower GCF t-PA levels than placebo group at 6 and 9-months (p < 0.05). Conclusions: These results provide additional information about usefulness of LDD therapy as an adjunct to nonsurgical therapy in long-term management of periodontitis. Received 8 May 2006; returned for revision 13 June 2006; accepted by J. Di Battista 12 July 2006     

Periodontal assessment of postmenopausal women receiving risedronate

OBJECTIVE: The purpose of this study was to compare periodontal status of postmenopausal women with mild to moderate osteoporosis who use risedronate therapy with those who do not. DESIGN: In this cross-sectional study, a total of 60 age-matched postmenopausal women with mild to moderate osteoporosis diagnosed by a bone density scan T score below -2.5 at either spine or hip were divided into two groups. Women in the experimental group had used systemic risedronate once weekly (35 mg) for at least 3 months. Women in the control group had never used bisphosphonate therapy. The periodontal status of each subject was evaluated through a clinical periodontal examination including evaluation of periodontal probing depth, gingival recession, gingival index, plaque score, attachment loss, and alveolar bone level. The significance in differences between the two groups was assessed using two-tailed paired t tests. RESULTS: Significant differences (P < 0.05) were found between risedronate and control groups for periodontal probing depth (2.6 vs 2.9 mm), gingival index (0.37 vs 0.71), plaque score (56.2 vs 77.0), attachment loss (2.8 vs 3.2 mm), and alveolar bone level (3.1 and 4.0), respectively. Gingival recession parameters did not differ significantly. Five of six periodontal parameters evaluated show that postmenopausal women with mild to moderate osteoporosis using risedronate therapy have healthier periodontal status than those who do not use bisphosphonates. CONCLUSIONS: Women using risedronate therapy show significantly less plaque accumulation, less gingival inflammation, lower probing depths, less periodontal attachment loss, and greater alveolar bone levels. These observations suggest that risedronate therapy may play a beneficial role in periodontal status.