Showing posts from 2012

Uncovering New Anticariogenic Agents

by Zachary R. Conley

The formation of dental plaque involves a rather ordered pattern of bacterial colonization. As the teeth erupt (or if they are cleaned), surfaces of the enamel are first coated with conditioning film which is characterized by molecules from the host (e.g., saliva) and from the bacteria (e.g., secreted by-products). Early colonizers will grow and change the local conditions to increase its suitability for more discriminating species which colonize later, attaching to previously bound bacteria by adhesion-receptor mechanisms.  Biofilm efficiently produce acid via their metabolism of carbohydrates, leading to demineralization of hard dental tissue. In order to prevent caries, it is essential to set our targets on the formation process of dental biofilms. 1 
Anticariogenic compounds that are able to target the mechanisms of biofilm formation are gaining interest in recent history, and provide effective supplements to typical mechani…

Chairside Diagnostic Test Kits in Periodontics - A Review

Sachin Malagi
MDS Lecturer, Dpt of Periodontics
COORG Institute of Dental Sciences
Rajiv Gandhi University of Health Sciences, India

A Simplified Impression Technique for Distal Extension Removable Partial Dentures

By Elie Daou* | Paul Boulos**

* DDS, MSBM, DESP. Instructor, Dpt of Removable Prosthodontics School of Dentistry, Lebanese University, Beirut, Lebanon.

** DDS, DEA, PhD Director of postgraduate program, Dpt of Removable Prosthodontics Faculty of Dental Medicine, Saint-Joseph University of Beirut

The construction of a removable partial denture in distal extension cases is a delicate procedure since the prosthesis is supported by two different tissues, namely teeth and mucosa. The different resiliency of these supporting tissues may lead to the instability of the prosthesis. This paper describes a functional impression technique that aims to equalize the masticatory load between teeth and edentulous areas thus reducing the instability of the partial denture during function and preserving the residual teeth.
Keywords: Distal extension - dental impression - removable partial denture.

Construction and Use of Mouthguards When in Orthodontic Treatment

By Dr. Derek Mahony

It is widely accepted in the dental community that mouthguards reduce injuries in sport, and the most effective mouthguard is that traditionally made indirectly on a model. These mouthguards are made from an impression of the teeth, soft tissues, and fitted predominantly to the upper teeth.

The prescription of sports mouthguards, to a person who is undergoing orthodontic treatment, is a difficult situation to apply traditional indirect mouthguard construction methods. Traditionally made mouthguards are expensive to produce, very time consuming to fit in the orthodontic practice, and the materials used for indirect traditional mouthguards cannot be easily refitted, by the Orthodontist, or by the patient.

Comparison of short term effectiveness of four different tooth whitening systems.

By Faraj A. Behbehani, Jaber Akbar, Yacoub Altarakemah, Prem Sharma

Abstract: Statement of the Problem : Dental practitioners are faced with many materials and methods commercially available for tooth whitening. This study aims to compare the short term effectiveness and major side effects of 4 popular bleaching systems in a relatively large sample. Materials and Methods: A sample of 300 subjects were divided equally into 4 groups and treated with ( home bleaching - Opalescence 20%, in office – Bright Smile, in office - Zoom, and in office - Zoom plus home bleaching - Day White 9.5%). Results: The four whitening systems were significantly effective at 3 days (T1) and 3 months (T2) after the whitening treatment. At T2, there was no significant difference in whitening effectiveness among the four whitening systems. Tooth sensitivity and gingival irritation were associated with the 4 whitening systems. Conclusion: The bleaching procedures tested i…

Gastro esophageal Reflux Disease (GERD) and Tooth Erosion; Statistical study of 100 cases

By Dr. Ines kallel


 Dental erosion was defined as dissolution of tooth by a solution that is low in pH either after the consumption of extrinsic acidic fluids or when gastric fluids come into the oral cavity. Gastro esophageal reflux (GERD) is a condition defined as an involuntary passage of gastric juice against the normal flow of digestive tract. It can be abnormal phenomena on in newborns and usually disappears with age; however, in some individuals, its maintenance can be considered a pathological condition. (1)

The association between acid reflux and dental erosion was first described by Howden in 1971 and was confirmed in other studies later, both in the adult population and in children. (2, 9, 23)

This association is commonly observed by dentists, but is given very cursory mention or omitted entirely when describing extra esophageal (supra-esophageal) manifestations of GERD. (3)

A recent systematic review found a median prevalence of 24…

How Prepared Are You for a Medical Emergency?

Dr. Catharine Goodson

"One day you will wake up and there won't be any more time to do the things you've always wanted. Do it now…"
— Paulo Coelho

In March 2011 what was supposed to be a routine wisdom tooth extraction on a 17-year-old girl from Woodstock, Maryland, went horribly wrong. Jenny Olenick had been given the standard dose of anesthesia, but it didn’t sedate her adequately. The anesthesiologist administered more, and the procedure began. Then Jenny began experiencing bradycardia, or a slowing heart rate, and the oxygen saturation in her blood started dropping. Soon she went into hypoxic arrest.
Emergency responders were called and restored Jenny’s pulse within four minutes of their arrival, but the damage had been done. Jenny was rushed to the hospital, where she died after being in a coma for a week. The autopsy showed that Jenny had brain edema and acute hypoxic-ischemic encephalopathy due to lac…

A Standardized Protocol For Successful Mandibular Implant Overdentures

By Marwan DAAS, André ASSAF, Karim DADA

In a recent meeting at McGill University (Canada)1, a consensus was reached concerning the mandibular overdenture retained by two symphyseal implants. It must now be considered the minimal prosthetic treatment that most edentulous patients should expect from their dentist. However, the implant procedure must follow a well-controlled protocol since its success is neither the goal in and of itself nor is it a solution to the prosthetic handicap. Placing the implants is only the means to foster a higher success rate for the denture2.
Beyond the psychological problem related to its removability, the mandibular implant overdenture (MIO) is considered by many patients to be satisfactory on the aesthetic and functional levels, together with the comfort and ease of maintenance that it provides 3-4. If this treatment modality meets a certain number of criteria, it will be able to respond to the demand of a large number of totally edentulou…

Refining Occlusion with Muscle Balance to Enhance Long-term Orthodontic Stability

By Dr. Derek Mahony
The primary objective of orthodontic treatment is the movement of teeth into a more ideal relationship, not only for aesthetic, but also for functional considerations.  Another very important objective, often not given enough consideration, is the need to finish the case with the muscles of mastication in equilibrium.  If muscle balance is not achieved,  an endless procession of retainers, is required for retention.  In simple terms, if the occlusal forces in maximum intercuspation are unevenly distributed around the arch, tooth movement will most likely occur.  However, today it is possible to precisely measure the relative force of each occlusal contact, the timing of the occlusal contacts and specific muscle contraction levels, all simultaneously.  This technological breakthrough represents a new opportunity for orthodontists everywhere.