聚维酮碘漱口液掏菌斑的作用

目的：测定一种新型漱口液：艾利克－聚维酮碘溶液（１％）对菌斑形成的影响。方法：让２５名牙周组织健康的志愿者分别用１％聚维酮碘溶液、多贝尔氏漱口液、蒸馏水含漱,记录４８小时后的菌斑指数,并做１％聚维酮碘溶液体外抑菌试验。结果：１％聚维酮碘溶液抑制菌斑的作用明显好于多贝尔氏漱口液和蒸馏水。结论：１％聚维酮碘溶液对菌斑的抑制作用明显。     

口炎平漱口液抑制菌斑的作用

我们研制了以天然植物五倍子提取液为主要成份的口炎平漱口液.并用双盲随机对照试验,比较口炎平漱口液与朵贝尔氏液抑制菌斑和实验性龈炎发生的效果.1 材料和方法受试者:西安市警察学校二年级学生150名,年龄20～22岁,均为男性.受试者牙列完整,部分牙齿有不同程度的牙龈炎,但牙周、口腔粘膜正常,半月之内无抗生素服药史.含漱剂:3种含激剂:口炎平漱口液(试验组)、朵贝尔氏液 (对照组)、蒸馏水(空白对照组).由药师预先配制好,并随机编为1、2、3组,其外观和包装一致,检查者和受试者均不知每次所使用的药剂.     

保健漱口液抑制菌斑的疗效观察

保健漱口液抑制菌斑的疗效观察丁一，吴娅菲，易平，肖晓蓉，刘豫蓉，张举之成都市华西医科大学口腔医学院（６１００４１）保健漱口液是新近研制出的漱口液。现采用随机双盲对照研究，观察保健漱口液抑制菌斑的效果，并作体外抑菌实验，为保健漱口液的推广应用提供可靠的...     

一种香精油漱口水抑制菌斑和牙龈炎症作用的研究

目的评价一种香精油漱口水抑制菌斑和牙龈炎症的作用。方法将67名改良牙龈指数(MGI)≥1.5且改良菌斑指数(MPI)≥2.0的受试者纳入试验,指导其在每天早晚刷牙后含漱20ml香精油漱口水30s,持续13周之后,检查受试者的MGI、MPI和牙龈出血指数(GBI),与基线值进行比较。结果使用香精油漱口水13周之后,与基线值相比,受试者的MGI下降了26.52%,MPI下降了61%,GBI下降了30.65%,差异均有显著性(P<0.01)。结论在日常刷牙的同时,配合使用香精油漱口水能够抑制菌斑和牙龈炎症。     

聚维酮碘溶液辅助牙周治疗的疗效观察

常规的牙周洁治和刮治治疗虽然有效,但在牙周袋过深、根分叉病变多的情况下,常使疗效有局限性,或者多复发。药物的应用在一定程度上可起到辅助牙周基础治疗的作用。药物放于牙周袋内,能长时间在局部保持药物的高浓度,靶向作用于病变部位,副作用小,被认为是药物辅助牙周治疗最有     

牙周炎患者附着菌斑和非附着菌斑的比较

选取２５名牙周炎患者，采用不同的取菌方法，分别采取其龈下附着菌斑和非附着菌斑的标本，通过暗视野显微镜和刚果红涂片染色进行观察，结果显示：无论是暗视野显微镜还是刚果红涂片观察，龈下附着菌斑和非附着菌斑的细菌组成都是明显不同的；附着菌斑中，球菌占较大比例，可动菌和螺旋体相对较少，而非附着菌斑中的可动菌和螺旋体则占主要地位，球菌相对较少，进一步证实了龈下非附着菌斑是与牙周病关系最为密切的微生态区，也是牙     

葡萄柚漱口液抑制菌斑形成的体内研究

目的:研究葡萄柚漱13液在体内对菌斑的抑制作用.方法:采用双盲一自身前后对照实验研究葡萄柚漱口液的菌斑抑制能力,并与口泰和西吡氯铵漱口液进行比较.结果:葡萄柚漱口液的菌斑抑制能力与西吡氯铵漱口液相比无显著差异,弱于口泰漱口液,且与另两种漱口液相比口感好,易被受试者接受.结论:葡萄柚漱口液作为一种新型天然植物提取物漱口液,具有良好的菌斑抑制效果.     

氟化钠漱口对乳牙邻面菌斑的作用

采用组织学、组织化学及超微结构的观察方法研究氟化钠漱口后乳牙邻面自然菌斑的结构变化，发现用氟时间的长短不同，对细菌及基质的影响程度亦不同，不同的患龋状态（ＣＲ、ＣＳ）的菌斑都对氟有明显的反应，其中ＣＳ组反应更明显一些。     

表皮生长因子与胶原蛋白复合物对小型猪修复性牙本质形成作用的实验研究

目的：观察表皮生长因子(Epidermal growth factor,EGF)与胶原蛋白海绵(col1agen sponge,CS)复合物对小型猪修复性牙本质形成的影响。方法：选用实验用小型猪牙齿36颗,采用EGF／CS复合物为材料进行直接盖髓术,通过组织病理学方法常规制备牙-颌骨联合切片,光学显微镜下观察修复性牙本质形成情况,并与氢氧化钙糊剂直接盖髓对照。结果：小型猪牙用EGF／CS直接盖髓术后2周,穿髓孔周边可见修复性牙本质团块形成,团块周围有成牙本质细胞样细胞围绕;术后4周有完整的修复性牙本质桥形成;术后12周修复性牙本质桥增厚且结构致密,严密封闭穿髓孔,桥体近髓腔面形成明显的管样牙本质,下方为整齐排列的典型成牙本质细胞。用氢氧化钙糊剂直接盖髓,术后2周可见穿髓孔处有炎症坏死区,只有少量钙化团块形成,术后4～12周逐渐形成完整的修复性牙本质桥,但形成速度较慢且牙本质桥厚度较薄。结论：EGF与胶原蛋白复合物显著促进牙髓细胞分化和修复性牙本质形成,是一种有临床应用价值的生物活性盖髓剂。     

EFFECT OF 2% IODINE DISINFECTING SOLUTION ON BOND STRENGTH TO DENTIN

Introduction:

Disinfection of dentin surfaces is desirable so long as it does not interfere with subsequent bonding of adhesive resins.

Objective:

To test the null hypothesis that bond strengths to dentin are not affected by previous application of an iodine disinfecting solution.

Materials and Methods:

Twenty-four extracted non-carious molars were selected. Occlusal enamel was removed producing a flat dentin substrate. Test teeth were all treated with 2% Iodine disclosing/disinfecting solution (I₂DDS) for 20 sec and rinsed for 20 sec followed by the application of self- or total- etching bonding systems, generating five adhesive groups (n=3): Single Bond;; Prime & Bond NT; Clearfil SE Bond; Opti-Bond Plus. The control groups (n=3 per adhesive) had no disclosing/disinfectant application prior to adhesive application. A 4-mm thick resin restoration was built up on each tooth for microtensile testing. Statistical analyses between experimental and control groups were performed by student''s t-test (α = 0.05).

Results:

In general, experimental groups (previously treated with I₂DDS) showed significantly lower bond strength values when compared with their respective controls (p<0.05), except for group Prime &Bond I₂ that did not significantly differ from its control (p>0.05).

Conclusion:

Acetone-base adhesive systems seem not to be affected by the application of I₂DDS prior to etching and bonding procedures.     

面积对陶瓷修复体体瓷色度学的影响

目的：探讨陶瓷修复体的色彩与其面积的关系。方法：分别制作厚度为2mm,直径为8mm、12mm、16mm、20mm的圆盘状B3色体瓷试件,在D65光源条件下,以分光光度计分别测试各组试件在黑色背景和在白色背景条件下的混合色。结果：随陶瓷试件直径由8mm增加至20mm,试件中心的色度值变化表现为：①彩度增加,色调趋向红色。②明度在黑色底板下增加,在白色底板下减小。②陶瓷试件直径由16mm增加至20mm时,试件色度值变化不明显。结论：陶瓷试件色度值随直径增大而趋向稳定。     

EFFECT OF A DENTIFRICE CONTAINING ALOE VERA ON PLAQUE AND GINGIVITIS CONTROL. A DOUBLE-BLIND CLINICAL STUDY IN HUMANS

The effect of Aloe vera on the reduction of plaque and gingivitis was evaluated in a randomized, parallel and double-blind clinical trial. Subjects were randomly allocated to the test group (n=15) – dentifrice containing Aloe vera - or the control group (n=15) – fluoridated dentifrice. Plaque index (PI) and gingival bleeding index (GBI) were assessed at days 0 and 30. Subjects were asked to brush their teeth with the control or test dentifrice, three times a day, during a 30-day period. There was a significant reduction on plaque and gingivitis in both groups, but no statistically significant difference was observed among them (p>0.01). The dentifrice containing Aloe vera did not show any additional effect on plaque and gingivitis control compared to the fluoridated dentifrice.     

腭裂手术对中耳功能的影响

目的 探讨腭裂手术对患者中耳功能的影响,为早期改善患者中耳功能障碍提供依据。方法 选择腭裂患者191例于腭裂术前3天、术后1周、3个月及6个月时常规进行中耳功能检查,并与对照组比较。结果腭裂患者术前常伴有程度不同的中耳功能障碍。术后除1周时中耳功能障碍加重外,3个月、6个月时均有明显改善,但与正常同龄人比较,仍有一定的差距。结论 腭裂手术能改善患者的中耳功能,但必须配合其他的方法方可彻底解决患者面临的问题。     

大黄滴剂对金黄地鼠实验性牙周炎的作用

目的：评价大黄滴剂对金黄地鼠实验性牙周炎的疗效。方法：将金黄地鼠以钢丝结扎、细菌接种和喂以高糖糊剂的方法致牙周炎。各组动物分别以不点药、点碘甘油和点大黄滴剂处理。感染三周后评价临床和微生物学效果。结果：实验组的唾液隐血指数、菌斑指数和牙槽骨吸收值均明显低于阳性对照组,且有统计学意义;细菌总数少于阳性对照组。结论：大黄滴剂对实验性牙周炎有明显疗效。     

牙周治疗对糖尿病患者糖化血红蛋白的影响

目的：观察牙周治疗对糖尿病患者牙周状况及化血红蛋白的影响。方法：将选择的病例分为牙周治疗组和非牙周治疗组,牙周治疗组给予牙周基础治疗,记录同一位点治疗前及治疗后的一个月、三个月牙周临床检查指标及糖化血红蛋白的情况。非牙周治疗组暂不做牙周治疗,记录同一位点检查前及检查后一个月、三个月牙周临床检查指标及糖化血红蛋白的情况。结果：牙周治疗组牙周临床检查指标及糖化血红蛋白治疗后与治疗前相比有显著差异。非牙周治疗组无显著差异。结论：对患有成人牙周炎的糖尿病患者牙周基础治疗后短期效果是满意的,牙周治疗可降低糖化血红蛋白的水平。     

EFFECT OF STORAGE PERIOD ON THE ACCURACY OF ELASTOMERIC IMPRESSIONS

Aims:

To investigate the effect of the storage period on the accuracy of recently developed elastomeric materials.

Methods:

Simultaneous impressions of a steel die were taken using a polyether (I: Impregum Soft Heavy and Light body, 3M ESPE) and vinyl polysiloxane (P: Perfectim Blue Velvet and Flexi-Velvet, J.Morita). The trays were loaded with the heavy-bodied impression materials while the light-bodied impression materials were simultaneously spread on the steel die. The impressions were poured after 2 hours, 24 hours, and 7 days. Impressions were stored at approximately 55% relative humidity and room temperature. Ten replicas were produced for each experimental condition (n=60). Accuracy of the stone dies was assessed with a depth-measuring microscope. The difference in height between the surface of the stone die and a standard metallic ring was recorded in micrometers at four demarcated points, by two independent examiners. Dxata were submitted to two-way ANOVA and Tukey test (α = 0.05).

Results:

Significant differences were found among the groups. Smaller discrepancies were observed when pouring was performed up to 24 hours (I-2h= 65.0 ± 15.68 μm; I-24h= 81.6 ± 11.13 μm) for the polyether, and up to 7 days for the vinyl polysiloxane (P-2h= 79.1 ± 13.82 μm; P-24h= 96.8 ± 6.02 μm; P-7d= 81.4 ± 4.3 μm). Significant dimensional discrepancies, however, were observed when polyether was stored for 7 days (I-7d= 295.3 ± 17.4 μm).

Conclusion:

Storage may significantly affect the dimensional accuracy of impressions and, thus, a maximum period and storage condition should be specified for the recently developed materials.     

牙槽嵴条件对全口义齿修复影响的临床研究

探讨无牙颌牙槽嵴条件,特别是下颌牙槽嵴条件对全口义齿修复效果的影响。方法无牙颌患者６２人,条件好组３０人,条件差组３２人,测试上下总义齿和固位力,咀嚼效率,和第一月,第三月的全口义齿满意度。结果不同牙槽嵴条件两组间的固位力,咀嚼效率,和第一月,第三月的总满意度及各单项满意虽略有差别。