1) There is fair evidence (II-2, grade B recommendation) of an association of pneumonia with oral health (odds ratio [OR]=1.2 to 9.6 depending on oral health indicators). 2) There is poor evidence of a weak association (OR<2.0) between COPD and oral health (II-2/3, grade C recommendation). 3) There is good evidence (I, grade A recommendation) that improved oral hygiene and frequent professional oral health care reduces the progression or occurrence of respiratory diseases among high-risk elderly adults living in nursing homes and especially those in intensive care units (ICUs) (number needed to treat [NNT]=2 to 16; relative risk reduction [RRR]=34% to 83%).

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Taurodontism can be defined as a change in tooth shape caused by the failure of Hertwig's epithelial sheath diaphragm to invaginate at the proper horizontal level. An enlarged pulp chamber, apical displacement of the pulpal floor, and no constriction at the level of the cementoenamel junction are the characteristic features. Although permanent molar teeth are most commonly affected, this change can also be seen in both the permanent and deciduous dentition, unilaterally or bilaterally, and in any combination of teeth or quadrants. Whilst it appears most frequently as an isolated anomaly, its association with several syndromes and abnormalities has also been reported. The literature on taurodontism in the context of endodontics up to March 2007 was reviewed using PubMed, MEDLINE and Cumulative Index to Nursing & Allied Health Literature. Despite the clinical challenges in endodontic therapy, taurodontism has received little attention from clinicians. In performing root canal treatment on such teeth, one should appreciate the complexity of the root canal system, canal obliteration and configuration, and the potential for additional root canal systems. Careful exploration of the grooves between all orifices particularly with magnification, use of ultrasonic irrigation; and a modified filling technique are of particular use.

PDT as an independent treatment or as an adjunct to SRP was not superior to control treatment of SRP. Therefore, the routine use of PDT for clinical management of periodontitis cannot be recommended. Well-designed clinical trials are needed for proper evaluation of this therapy.

In patients with CP, a single application of PDT (using a 638-nm laser and toluidine blue) did not provide any additional benefit to SRP in terms of clinical parameters or inflammatory markers 3 months following the intervention.

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Practicing evidence-based dentistry is a process of lifelong and self-directed learning. Teaching evidence-based dentistry to dental students is the key to increasing the uptake of evidence-based treatments and practices in dentistry. This article describes the procedures undertaken to teach undergraduate dental students at the University of Toronto Faculty of Dentistry how to produce systematic reviews as a module in clinical epidemiology. Nine selected reports have been summarized as examples of the outputs of this module. At the end of the module, students are asked to participate in a survey and anonymously fill out a questionnaire to evaluate the module. Students' evaluation of the module in the 2005-06 (n= 64) and 2006-07 (n=57) academic years were extracted for data analysis. Overall, the majority of students found the module an enjoyable way of learning that has improved their ability to gather information, apply existing evidence to a clinical question, evaluate information, and further develop their communication skills. This module was also effective in raising students' awareness of the importance of evidencebased clinical practice. It is essential to establish the fundamentals of evidence-based practice during the undergraduate curriculum to assist dental students in learning the skills to practice evidence-based dentistry.

Background: Bisphosphonate related osteonecrosis of the jaws (BRONJ) is a severe but