正畸病人后牙段腭弓形态的测量

目的:研究正畸病人后牙段腭弓形态的规律,为临床预成腭杠的制作提供理论基础.方法:选择60例正畸病人,按牙齿萌出情况(牙龄)分为3组,灌取上颌模型,测量第一磨牙区腭弓的高度、宽度和弧长,统计分析.结果:恒牙列组后牙段腭弓高度、宽度及弧长测量值最大,替牙组最小,有统计学意义.结论:牙列由替牙列向恒牙列的发育过程中,腭弓也在发育,其趋势是高度,宽度和弧长的不断增加,尤其以替牙列向恒牙期过度时,此变化最为明显(P＜0.01).临床使用腭杠时需注意腭部的这种特点.     

维生素D3衍生物对人成骨细胞生长和碱性磷酸酶活性的影响

目的：使用人胎成骨细胞（ＯＢ）为体外模型，观察了１，２５－双羟维生素Ｄ３〔１，２５（ＯＨ）２Ｄ３〕、２４，２５－双羟维生素Ｄ３［２４，２５（ＯＨ）２Ｄ３）］对ＯＢ生长和代谢的影响。方法：用ＡＬＰ测定法和Ｂｒａｄｆｏｒｄ蛋白含量法。结果：１，２５（ＯＨ）２Ｄ３在浓度为１０８ｍｏｌ／Ｌ时，刺激碱性磷酸酶（ＡＬＰ）的活性。但抑制ＯＢ的生长。２４，２５（ＯＨ）２Ｄ３在１０－８ｍｏｌ／Ｌ时无上述作用。结论：１，２５（ＯＨ）２Ｄ３对ＯＢ的ＡＬＰ有直接的促活作用，其作用与时间相关。２４，２５（ＯＨ）２Ｄ３对ＯＢ的ＡＬＰ活性无关。１，２５（ＯＨ）２Ｄ３对人胎ＯＢ生长有抑制作用。     

Clinical pathology study of lingual carcinoma treatment with CDDP-AMS microcapsules through lingual artery]

11 patients with lingual carcinoma were treated by artery chemoembolization with 100 mg CDDP-AMS microcapsules (CDDP 13.6 mg) through lingual artery, and the average diameter of microcapsules was 56.3 microns. There was no obvious carcinoma cell or carcinoma tissue in pathologic specimens of the tissue after 4 weeks of treatment. After 5-6 weeks of chemoembolization, the clinical tumor ulcer disappeared, but it was difficult to judge the change of the tumor because of local fiber tissue. After 6 months, by observation of 4 patients whose tumors had not been excised, it was found that the infiltuation mass of primary carcinoma disappeared and tongue body became soft. It suggests that artery chemoembolization with CDDP-AMS microcapsules is an efficient way of lingual carcinoma treatment.     

差速传代纯化大鼠牙囊细胞

目的:建立一种简捷的分离培养和纯化大鼠牙囊细胞的方法。方法:分离出生后6dSD大鼠上下颌第一和第二磨牙完整牙胚,剥离牙囊和成釉器,剪碎后酶消化并混合培养,再利用多次差速传代纯化牙囊细胞。结果:原代细胞为牙囊细胞和成釉器细胞混合生长,差速传代培养到第4代可获得纯化的牙囊细胞。倒置显微镜下观察牙囊细胞呈长梭形或三角形,免疫组化染色抗波形丝蛋白阳性,抗角蛋白阴性。结论:利用多次差速传代可从混合培养的原代细胞中获得纯化的牙囊细胞。     

不同孔径新型复合材料硅／磷酸钙修复骨缺损实验研究

目的：探讨不同孔径新型复合材料硅，磷酸钙植入兔下颌骨缺损区的成骨能力。方法：将3种不同孔径硅膦酸钙（大孔型300μm、150μm及致密型）分别植入兔下颌骨缺损区。分别在术后3、6、12周取材进行大体、组织学观察及新骨形成的统计学分析。结果：3种不同孔径硅，磷酸钙在12周均能与邻近骨组织骨性结合：2种大孔型硅，磷酸钙新生骨面积百分比均显著大于致密型硅，磷酸钙（P〈0．01）。结论：大孔型硅，磷酸钙骨引导性、成骨活性优于致密型硅，磷酸钙。     

小鼠牙胚发育过程中collagenⅠ/Ⅲ的表达分布

目的:探讨collagenⅠ、Ⅲ在Balb/c小鼠牙胚发育各期的时间和空间分布特点,及两者在牙齿发育矿化中的作用。方法:用免疫组化方法检测小鼠牙胚发育各期collagenⅠ、Ⅲ的表达、分布。结果:collagenⅢ:出生前E13d小鼠牙胚蕾状期:口腔上皮细胞阳性表达( );E14~17d帽状期:口腔上皮细胞、成釉器星网层细胞表达弱阳性;E18~19d和出生后P1d钟状期与分化期:口腔上皮细胞、成釉器星网层细胞、牙乳头细胞、牙囊细胞表达阳性( );出生后P2~10d牙冠发育成熟期:成釉细胞、釉基质、成牙本质细胞、前期牙本质、牙乳头细胞、牙囊细胞、牙髓组织等均表达阳性( );P10~30d牙根发育成熟期:除上述细胞成分外,上皮根鞘、根周及根尖牙槽骨、牙骨质和牙周膜表达强阳性( )。collagenⅠ:在蕾状期无表达;帽状期:口腔上皮细胞、成釉器星网层细胞表达阳性;钟状期与分化期:口腔上皮细胞、成釉器星网层细胞、牙乳头细胞、牙囊细胞表达阳性;牙冠和牙根发育期:其分布和表达类似于collagenⅢ。结论:鉴于collagenⅠ、Ⅲ的表达和分布,表明它们均参与了牙胚和牙体硬组织的发育形成,但似乎cllagenⅢ的作用比collagenⅠ更为广泛。     

牙齿感觉过敏症流体动力学说研究进展

牙齿感觉过敏症临床较为常见，但发病机理尚不十分清楚。主要学说包括成牙本质细胞感受器学说、神经末梢直接接受刺激学说和流体动力学说，其中以流体动力学说广为接受。其基本理论为牙本质小管是有渗透性的组织，其渗透性越大，牙本质液流量越大；牙本质液的异常流动引起牙髓神经兴奋而产生痛觉；牙本质液流量与神经纤维兴奋性成正比。     

心理评估量表结合Procam评分对非特异性胸痛患者的预测效应

目的 探讨心理评估量表和Procam评分对非特异性胸痛(NSCP)的预测效应.方法 对2019年7月至2020年12月该院87例胸痛患者进行冠状动脉造影(CAG)检查,按检查结果分为NSCP和缺血性胸痛(ICP).比较两组临床资料、Procam评分、躯体化症状自评量表(SSS)评分、综合医院焦虑与抑郁量表(HADS)评分,分析各评分与NSCP的相关性.结果 两组年龄、性别、吸烟史、糖尿病史、高血压病史、三酰甘油(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、左心室舒张末直径(LV)、射血分数(EF)比较,差异无统计学意义(P>0.05).NSCP组Procam评分较ICP组低,SSS评分、HADS-a评分、HADS-d评分较ICP组高,差异有统计学意义(P<0.05).Procam评分、HADS-a评分是NSCP的独立危险因素[HR:1.107(1.039～1.179),P=0.002;HR:0.641(0.469～0.875),P=0.005].Pro-cam评分联合HADS-a评分检验效能曲线下面积(AUC)及约登指数均高于Procam评分及HADS-a评分单项评估.结论 Procam评分联合HADS-a评分预测NSCP价值更优.     

Combined Effect of Smoking and Obesity on Coronary Heart Disease Mortality in Male Veterans: A 30-year Cohort Study

Objective Evidence is lacking regarding the combined effects of smoking and obesity on mortality from coronary heart disease in male veterans.This study aimed to explore the combined effect of smoking and obesity on coronary heart disease mortality in male veterans in China.Methods A cohort of 1,268 male veterans from 22 veteran centers in Xi’an(Shaanxi Province,China)were followed up once every 2 years from February 1,1987 to October 30,2016.The endpoint was death from any cause.The hazard ratio(HR)of each risk factor and the 95%confidence interval(CI)were calculated using a multivariate Cox proportional hazard model.Results The total follow-up was 24394.21 person-years;each subject was followed up for a mean duration of 19.24 years.By the end of the study,of the 1,268 veterans,889 had died,363 were alive,and 16 were lost to follow-up.Cox regression analysis results revealed that current smoking(HR:1.552,95%CI:1.074–2.243),obesity(HR:1.625,95%CI:1.024–2.581),and the combined effect of the two factors(HR:2.828,95%CI:1.520–5.262)were associated with coronary heart disease mortality.Conclusion Our results suggest that obese veterans who smoke might be an important target population for coronary heart disease mortality control.