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Supporting Your Practice

What is the preferred technique for taking an impression for a cast post & core?

In this short video (2:36), Dr. Bob Loney, Professor and Chair of the Dental Clinical Sciences Department at the Faculty of Dentistry, Dalhousie University, demonstrates a technique that provides a bubble-free impression that won’t distort. Paint the impression tray with adhesive. Pack and remove retraction cord. Inject light-body polyvinyl siloxane impression material all around the completed crown preparation. ensuring to capture the crown margins. Squeeze some light-body material on to a pad and coat it over the length of a lentulo spiral filler on a contra-angle slow speed handpiece. Place the coated lentulo spiral filler down the canal where its ...

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Light Curing: So Easy, So Dangerous!

In these videos, Dr. Richard Price, Professor and Head of Fixed Prosthodontics in the Department of Dental Clinical Sciences at Dalhousie University’s Faculty of Dentistry, shares excellent clinical information related to light curing. The video has been divided into short theme section as follows:  Light curing so easy, so dangerous! Complete video (27 minutes) The perfect storm The success of 122+ million restorations and 16+ million sealants placed annually depends on the curing lights and how it is used. Do we have any evidence that resin restorations are not lasting as long as they could and should?  Various curing modes and irradience We ...

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How can I safely and efficiently remove gutta percha to prepare a post space? Video Demonstration

In this short video (1:56), Dr. Bob Loney, Professor and Chair of the Dental Clinical Sciences Department at the Faculty of Dentistry, Dalhousie University, demonstrates how to remove gutta percha from a root canal in order to prepare an adequate post space to support a restoration on an endodontically treated tooth.     Use non-end cutting drills to prepare the post space. Always start with the smallest size of Gates Glidden drill or Peeso reamer and work up to the size required to accommodate the desired size of a post. Size the instrument, referring to a radiograph of the tooth ...

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How Do I manage a patient with asthma?

  This medical Condition Consult is presented by the JCDA Oasis Team Asthma is a chronic inflammatory respiratory disease associated with increased airway hyper-responsiveness. Patients are sensitive to a variety of stimuli (e.g., cold air, salicylates, NSAIDs, cholinergic drugs, beta-adrenergic blocking drugs). No information available to require special precautions.   Prescribe the following with caution, due to likely adverse reactions: 1. NSAIDs, ASA-containing medications: Samter triad syndrome, an association of ASA sensitivity, ASA-induced asthma, nasal polyposis or sinusitis. 2. Barbiturates, narcotics: may precipitate an asthma attack.   Sulfite preservatives A coughing reflex and prolonged supine positioning. Consider semisupine chair position. ...

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Is inadequate osseointegration a concern in radiation-treated patients, if implants are treatment planned?

This question was submitted by a general dentist: Is inadequate osseointegration a concern in patients who have received radiation therapy for a head and neck malignancy if implants are treatment planned? Dr. Jeff Chadwick, at Princess Margaret Hospital, Dental Oncology, Ocular, and Maxillofacial Prosthetics Group, provided a preliminary response to this question Yes, however … As with most questions related to this patient population, the answer is: “it depends.” Careful examination is a vital step in determining which restorative/prosthodontic approach best suits the individual. Examination also mandates a thorough review of their cancer diagnosis as well as the constituents and sequence ...

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What are the risk factors for osteoradionecrosis (ORN), in a xerostomic radiation-treated patient, if extractions are required?

This question was submitted to us by a general dentist: If extractions are required, what are the risk factors for osteoradionecrosis (ORN) in a xerostomic patient with rampant decay two years after the successful treatment of their head and neck cancer (radiation, chemotherapy and surgery)? Dr. Jeff Chadwick, at Princess Margaret Hospital, Dental Oncology, Ocular, and Maxillofacial Prosthetics Group, provided a preliminary response to this question:  With the numerous comorbidities associated with head and neck radiation (oral mucositis, radiodermatitis, dysgeusia, dysphagia/odynophagia, trismus, and xerostomia), arises a critical issue with tooth extraction is the altered biology of the maxilla and mandible due ...

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What is Pre-Eruptive Intra-Coronal Radiolucency (PEIR)?

This question was submitted by a general dentist: Has anyone seen ‘pre-eruption caries’? I have several cases where radiographically. there appeared to be caries on the occlusal surfaces of unerupted teeth. On eruption, I observed them for a while and after the first one increased in size over time, I went in and restored all of them. All seemed to be carious. Dr. Anuradha Prakki, Assistant Professor in Restorative Dentistry at the University of Toronto School of Dentistry, provided this quick initial response:  Researchers identify these cases as pre-eruptive intra-coronal radiolucency (PEIR), as the etiology of pre-eruptive intra-coronal radiolucent lesions is not ...

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How do you treat a periodontal abscess?

This Urgent care Scenario is presented by the JCDA Oasis Team in collaboration with Dr. Ignacio Christian Marquez, Associate Professor in the Division of Periodontics, Department of Dental Clinical Sciences, Faculty of Dentistry at Dalhousie University Periodontal Abscess Localized, purulent infection within the tissues adjacent to the periodontal pocket that may lead to the destruction of periodontal ligament and alveolar bone.     Investigation Inquire about any history of chronic periodontitis and the nature of any recent dental/periodontal interventions. Determine the existence of a periodontal pocket. Confirm the presence of purulent exudate. Obtain radiographic evidence of bone loss. However, the lack ...

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