逐步后退法和逐步深入法根管预备后约诊间痛发生的比较

目的 比较2种根管预备方法约诊间痛的发生情况。方法 对144例患者的23l颗患牙分别采用逐步后退法和逐步深入法进行根管预备，观察各自约诊间疼痛的发生情况。结果活髓牙中，分别有14．7％(逐步后退法组)和13．1％(逐步深入法组)发生约诊间痛，两组间无显著性差异。死髓牙中，分别有28．0％(逐步后退法组)和15．5％(逐步深入法组)发生约诊间痛，逐步后退法组明显高于逐步深入法组。结论 对死髓牙患者，采用逐步深入法进行根管预备可以减少约诊间痛的发生。     

硅橡胶一次印模法在铸造桩核中的应用

目的研究硅橡胶一次印模法制作桩核的临床应用效果。方法将237个残根随机分为试验组和对照组。试验组125颗残根,通过根管内导入硅橡胶印模,翻制石膏模型,完成桩核制作。对照组l12颗残根,口内直接制取桩核蜡型,完成桩核铸造。比较两组桩核的临床效果,卡方检验统计学分析。结果试验组成功122颗,失败3颗;对照组成功96颗,失败16颗。两组临床成功率差异有统计学意义(P<0.05)。结论硅橡胶一次印模法应用于制作铸造桩核中操作简便,临床效果好。     

在成年患者中逐步进行合理的多学科治疗计划

目前学科内、多学科间以及综合治疗计划已经成为日常医疗过程中的一部分。不同学科专家之间的相互交流为患者提供了一个更好、更保守、更满意的治疗效果。此病例报告呈现了一个多学科逐步治疗过程，并阐述了牙体牙髓病学，牙周病学，正畸学，种植学和修复学所涉及的治疗过程。     

Step cannulation system for both articular compartments of the TMJ: Technical note

We have developed a step cannulation system consisting of a set of six obturators with increasing diameters for effective use of the arthroscope in the diagnosis and surgical treatment of disorders of the temporomandibular joint.     

Closed Hollow Bulb Obturator—One‐Step Fabrication: A Clinical Report

A method is described for the fabrication of a closed hollow bulb obturator prosthesis using a hard thermoforming splint material and heat‐cured acrylic resin. The technique allowed the thickness of the thermoformed bulb to be optimized for weight reduction, while the autopolymerized seal area was covered in heat‐cured acrylic resin, thus eliminating potential leakage and discoloration. This technique permits the obturator prosthesis to be processed to completion from the wax trial denture without additional laboratory investing, flasking, and processing.     

Molecular Microbiological Evaluation of Passive Ultrasonic Activation as a Supplementary Disinfecting Step: A Clinical Study

IntroductionThis in vivo study used molecular microbiology methods to evaluate the effects of passive ultrasonic irrigation (PUI) as a supplementary disinfecting step after root canal preparation.MethodsSamples were taken from 10 necrotic root canals of teeth with apical periodontitis before (S1) and after rotary nickel-titanium instrumentation using 2.5% NaOCl as the irrigant (S2) and then after PUI for NaOCl activation (S3). The parameters examined included the incidence of positive broad-range polymerase chain reaction (PCR) results for bacterial presence, the impact on bacterial diversity evaluated by PCR-denaturing gradient gel electrophoresis (DGGE), the quantitative bacterial reduction determined by real-time PCR, and the identification of persistent species by clone library analysis.ResultsAll S1 samples were positive for bacteria in all tests. Treatment procedures were significantly effective in reducing the incidence of positive results for bacteria, the number of bacterial cells (infectious bioburden), and the bacterial diversity (number of species and abundance). However, the supplementary PUI approach did not succeed in significantly enhancing disinfection beyond that achieved by chemomechanical preparation. Several bacterial species/phylotypes were identified in post-treatment samples that were positive for bacteria.ConclusionsFindings from this clinical study including a small sample size suggest that PUI can be ineffective in significantly improving disinfection of the main root canal after chemomechanical procedures.