目的 探讨氟斑牙正畸托槽脱落的影响因素.方法 选取2017年1月至2021年11月期间本院收治的59例首次实施口腔正畸治疗的氟斑牙患者为研究对象,分析患者治疗后1年内的托槽脱落状况,比较不同资料患者的托槽脱落率.结果 全部患者共置入1 040个托槽,治疗后1年内共有190个托槽脱落,总脱落率为18.3％,其中以第1个月脱落最多,有55例,占28.9％(55/190),当月的脱落率达5.29％,之后逐月降低,从第5个月开始各月的脱落率基本维持稳定(约1％).不同年龄、牙位、颌位、氟斑牙严重程度患者正畸治疗后1年内的托槽脱落率比较,差异有统计学意义(P＜0.05),具体而言,≤14岁、第二前磨牙、下颌的托槽脱落率较高,随着氟斑牙程度的逐渐加重,托槽脱落率逐渐升高.结论 氟斑牙患者正畸托槽的脱落发生率较高,与年龄、牙位、颌位、氟斑牙严重程度有关.

目的:观察雷公藤红素联合平阳霉素对舌鳞状细胞癌Tca8113细胞增殖和凋亡的影响.方法:对Tca8113细胞进行常规培养,应用MTr法测定不同浓度雷公藤红素、平阳霉素、雷公藤红素联合平阳霉素(联合组)对Tca8113细胞的增殖抑制作用,采用流式细胞学对Tca8113凋亡细胞进行定量分析.结果:联合组对Tca8113细胞的增殖抑制率明显高于两药物单用组,各时间点差异具有统计学意义(P＜0.05);与空白组比较,各用药组Tca8113细胞的凋亡率明显升高,联合组细胞的凋亡率明显高于两药物单用组,24、48 h比较,差异均具有统计学意义(P＜0.05).结论:雷公藤红素与平阳霉素联合用药可提高Tca8113细胞增殖率和凋亡率,雷公藤红素具有化疗增敏作用.

目的 提高引导骨组织再生同期种植体植入术患者的围术期护理质量,从而保障手术成功,降低手术并发症.方法 对65例引导骨组织再生同期种植体植入术患者做好术前准备、术中配合、术后管理.结果 65例引导骨组织再生同期种植体植入术均成功,获得良好的初期稳定性;随访6个月,种植体周围骨组织与种植体均形成了紧密的骨性结合.结论 高质量的护理配合能有效提高手术效率及手术质量,降低手术并发症.

Objective To assess the color stability of different resin cements for porcelain veneer luting after accelerated ageing.Methods Four different resin cements were used in the study,including Superbond C&B,Variolink Ⅱ,RelyX Veneer and Filtek Z350 Flow.Samples(1 mm thickness) were prepared and randomly divided into 4 groups.The resin cements were bonded to ceramic disks built with the VITABLOCS MARK-Ⅱ ceramic(n=40,10 in each group).The color of the cements was all A3.All of the samples were stored in darkness for 24 hours.Then color measurements were determined using spectrophotometric method before and after accelerated ageing in a weathering machine.Changes in color(ΔE) were obtained using the CIE Lab system coordinates where ΔE data above 3 were accepted as visible discoloration.Results The ΔE of Superbond C&B,Variolink Ⅱ,RelyX Veneer and Filtek Z350 Flow were 2.32±0.21,2.50±0.29,0.68±0.24 and 0.79±0.20 respectively.The Superbond C&B and Variolink Ⅱachieved significant higher ΔE than the other groups(P<0.05).There was no significant difference between Superbond C&B and Variolink Ⅱ groups,as well as RelyX Veneer and Filtek Z350 Flow groups(P>0.05).Conclusions All of the resin cements assessed in this study show varying degrees of discoloration after accelerated ageing.However,the color changes are not beyond the clinical aesthetic demand.RelyX Veneer and Filtek Z350 Flow demonstrate higher color stability.

Objective To compare and analyse the flexure strength and elastic modulus of 4 kinds of dental fiber posts frequently used in clinics.Methods The flexural strength and elastic modulus of Style Post(group A),Parapost Fiber Whiter(group B),Fiber Kor(group C) and Twin-Luscent Anchor(group D) fiber posts were measured through three-point bending test with 10 firber posts in each group.The results were statistically analyzed.Results The flexure strength of group A was the highest,while that of group B and group C was the lowest,and there were no statistical differences among the groups(P > 0.05).There were no significant differences between group A and group D in elastic modulus(P > 0.05),and the elastic modulus of group A and group D were both lower than that of the other two groups(P < 0.05).Multitudinous cracks were observed in group B and C from SEM photos and there was a great degree of rupture generally.Conclusions The flexure strength and elastic modulus of 4 kinds of glass fiber posts are significantly different.The flexural strength and fiber / matrix ratios are linearly dependent.

Objective To compare curative effect of two acid corrosion caking agent in the treatment of teeth feel allergy and anti-allergic medicines Jiguning.Methods 270 teeth on hypersensitive were randomly divided into three groups,and treated by three medicines seperately.They were observed after treatment immediately,1 months of clinical curative effect,and were followed up for 6 months of forward curative effect.Results After treatment immediately,1 months G-BOND group and I-BOND group and routine drug compared to the difference between groups was statistically significant(P > 0.05).But in one month after treatment,G-BOND group and I-BOND group of forward curative effect is more ideal,the total effective rate decline in value is less than that in control group(P < 0.05).Conclusions G-BOND group and I-BOND group of recent curative effect affirmation,forward curative effect is relatively ideal,with the passage of time the clinical curative effect for longer.

Objective To study the clinical effects of Microstep Sinus Elevation Technique.Methods This prospective study involved 77 implants from 58 patients aged from 25 to 82 between January 2007 and Juanuary 2009.49 implants were placed simutaneously at the time when the sinus lift procedure was performed in the affected region using Microstep Osteotome Sinus Floor Elevation.20 implants placed by Kohler osteotome sinus floor elevation and 8 implants by Hu-Friedy were the control groups.Both clinical and radiographic evaluations were made for each patient.Results Microstep group completed large and long implants,no less than 12 mm in length and 4.5 mm in diameter.While,Kohler group completed the implants less than 11.5 mm in length and 4.5 mm in diameter.No sinus membrane perforation was observed during the procedure and during post operative follow-up periods in Microstep and Kohler groups.However,Hu-Friedy showed one implant failure(12.5%).All patients were satisfied with the implant restorations.Conclusions With the limitation of the early study,the Microstep Sinus Elevation Technique was a safer and simpler choice for large and long implants,while the Kohler with a stopper was also safe for ordinary implants.However,Hu-Friedy(without stopper)was not a safe product,especially for new users.

目的:临床研究Kennedy Ⅱ类牙列缺损采用MK1精密附着体义齿进行修复的效果.方法:28例对于原先普通可摘局部义齿不满意的KennedyⅡ类牙列缺损患者,均采用MK1精密附着体义齿进行修复.结果:经过3个月至3年随访,100%的患者表示对该义齿的固位性能、咀嚼效能、舒适程度以及装卸的方便程度感到满意.义齿损坏2例经过简单修理后患者满意.4例保存X线片资料完整者经过3至18个月观察,基牙牙槽骨未见明显吸收.结论:MK1精密附着体义齿修复KennedyⅡ类牙列缺损患者,满意度明显优于普通可摘局部义齿.临床观察还提示,MK1义齿尚不致造成短期基牙牙槽骨损害.

Objective: To evaluate the effect of clinical application of MK 1 universal attachment denture on Kennedy Ⅱdentition defect. Methods: 28 cases that were not satisfied with traditional removable denture were replaced with MK 1 universal attachment denture. Results: 28 cases (100%) were satisfied with the new dentures. 2 MK 1 dentures (6%) were failed but have been repaired quickly and easily. Conclusions: The restorative effect of MK 1 universal attachment denture was better than that with traditional removable denture on KennedyⅡdentition defect,and it won't damage alveolar bone in short term.