Baby teeth, Teeth crowns, Oral bacterial and pneumonia

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How much a dental Crown should last ?
And that doesn't mean every five-year-old crown should be replaced, said Doyle C. Williams, the chief dental officer for DentaQuest, a national dental benefits company.

"Ten to 20 years is the average lifetime of a real crown," Williams said, noting that he has had one crown in his mouth for 35 years. Williams, who also sits on the board of the National Association of Dental Plans, said he thinks the industry standard should be extended. "It should be changed, because it encourages people to change [a crown] every five years," he said. More HERE

To Fill or Not to FILL Baby teeth ?

Professor Martin Tickle, of the University of Manchester, found no difference in the numbers of extractions for pain or infection whether baby teeth had been filled or not.

And when he surveyed the parents of all five-year-olds living in Ellesmere Port and Chester in 2003, he found only 6% would want their child to have a filling if they had symptomless decay in a baby tooth.

They are conventional drilling and filling, no fillings or a painless paint-on tooth treatment that merely seals and contains the decay.

Lead investigator Dr Gail Topping, of the University of Dundee, said: "This is a really big question to answer.

"At the moment there is no clear winner and we do not know which is best to recommend. More on BBC

Role of pathogenic oral flora in postoperative pneumonia following brain surgery
A matched cohort of 18 patients without postoperative lung complications was compared to 5 patients who developed pneumonia within 48 hours after brain surgery. Patients waiting for elective operation of a single brain tumor underwent dental examination and saliva collection before surgery. Bacteria from saliva cultures were isolated and periodontal disease was scored according to type and severity.
The number and severity of coexisting periodontal diseases were significantly greater in patients with postoperative pneumonia in comparison to the control group (p=0.031 and p=0.002, respectively). The relative risk of developing postoperative pneumonia in high periodontal score patients was 3.5 greater than in patients who had low periodontal score (p<0.0001).Full Paper

New Research may Bring Relief To 3.5 Million Denture Stomatitis (Oral Thrush) Sufferers
According to the most recent adult dental survey, 28 percent of the UK population wears dentures and a quarter of these are likely to develop denture stomatitis or fungal induced stomatitis (mainly Candida albicans), commonly known as oral thrush. This is a significant problem for denture wearers and is seemingly on the increase.

The Armourers & Brasiers Venture Prize, which is awarded annually in the form of an investment, enables the winner to engage in the early commercialisation of promising research and has been won by a team of scientists from the University of Liverpool. This team is led by senior lecturer and material scientist, Dr Rachel Williams, and senior lecturer in oral surgery, Dr Luke Dawson.

The project's idea is based on a cost effective nanoparticle silica coating which inhibits the adhesion and proliferation of cells and micro-organisms. Laboratory tests show that the nanoparticulate silica coating can inhibit the build up of virulent oral thrush (Candida albicans). More

Orange Juice Worse For Teeth Than Whitening Agents

Eastman Institute’s YanFang Ren, DDS, PhD, and his team determined that the effects of 6 percent hydrogen peroxide, the common ingredient in professional and over-the-counter whitening products, are insignificant compared to acidic fruit juices. Orange juice markedly decreased hardness and increased roughness of tooth enamel.

Unlike ever before, researchers were able to see extensive surface detail thanks to a new focus-variation vertical scanning microscope. “The acid is so strong that the tooth is literally washed away,” said Ren, whose findings were recently published in Journal of Dentistry. “The orange juice decreased enamel hardness by 84 percent.” No significant change in hardness or surface enamel was found from whitening. Full Report

Attending Dental Meeting is Fun if all follow IDS style

Our annual dental meeting exhibit floors are too boring! At IDS, many dental companies have built-in cafes at their booths that serve coffee, tea, soft drinks, fresh fruit, and even hors d'oeuvres. There were even sushi bars set up in a couple of the booths! At about 5 p.m., the place really starts rocking with live bands in many of the booths, and the drinks become a little more serious than Diet Coke. The reason is that these companies not only want dental professionals to visit their booths, they want them to stay longer so they can talk to them about their latest products. More HERE

Smoking Linked To Brain Damage

ScienceDaily (June 23, 2009) — New research which suggests a direct link between smoking and brain damage will be published in the July issue of the Journal of Neurochemistry. Researchers, led by Debapriya Ghosh and Dr Anirban Basu from the Indian National Brain Research Center (NBRC), have found that a compound in tobacco provokes white blood cells in the central nervous system to attack healthy cells, leading to severe neurological damage. More here

Align Technology loses verdict to Ormco over patent
Align Technology Inc., the maker of a product to straighten teeth, violated a patent belonging to Danaher Corp.'s Ormco's unit over its Invisalign, a federal jury said.
After judgment is entered, Ormco said it will be entitled to ask the court to bar Align from infringing the patent and to seek a royalty from all Align sales since January 2003 related to the Invisalign aligners. More Here

Two-thirds of American adults are too fat
Two-thirds of American adults are either obese or overweight, and the groups warned that the U.S. obesity epidemic could derail efforts by lawmakers to reform the nation's health system.

"Our health care costs have grown along with our waist lines," said Jeff Levi, executive director of Trust for America's health, which released the report along with the Robert Wood Johnson Foundation. Full Details

SexySmile, New Dental school, Digital Photography

SexySmile- Designed by a Dentist

Leave it to a New York City, 5th Avenue no less, female cosmetic dentist, Dr. Pia Lieb, to create a revolutionary and state-of -the art tooth whitener. Aptly named SexySmile, the product is a dual-sided sleek silver tube about the size of a tube of mascara, which combines oral care and beauty benefits. One side, an instant tooth whitener with hydrogen peroxide, one of the strongest available outside the dentists’ office, and the other side a lip enhancing lip gloss. Click here for more

New Delhi Gets another Dental College

New Delhi-June 22: The Jamia Millia Islamia (JMI) is all set to start a new dental college from this academic session.

With an annual intake of 50 students, classes for the Bachelor of Dental Surgery (BDS) is likely to begin from mid August. Students will be offered admission to the BDS on the basis of written test followed by an interview. The entrance test is likely to be conducted in mid July.

Admission notification for the BDS will soon be announced by the varsity HERE. This is part of the great screw up plan- by Ghulam Nabi Azad on Wednesday who gave his nod to no less than 150 educational institutions including medical, dental, ayurveda and unani colleges. Full Times news

Bungling in MDS admissions goes on, Supreme Court tries to help

NEW DELHI: Forget private institutions, the bunglings in admissions to even government medical and dental colleges under the elite all-India quota PG seats continue to baffle the Supreme Court.

A Bench comprising Justices B Sudershan Reddy and Aftab Alam to its horror learnt on Friday that its clear direction to admit a student -- Ruchika Arora who has been harassed for no fault of her -- has fallen on deaf ears.

After the first round of counselling, Arora was allotted a PG seat in Periodontia at Government Dental College, Amritsar. After the second round of counselling, she was given the option by the Directorate-General of Health Services (DGHS) to join the same course at the Faculty of Dental Sciences, Chhatrapati Shahuji Maharaj Medical University, Lucknow.

She forfeited her seat at Amritsar and went to Lucknow only to be told that there was no vacancy. On getting back to Amritsar, she was informed that the seat vacated by her had been filled. A harassed Arora had then moved the SC. Full Report

Poor oral health linked to Memory loss

Keeping your teeth brushed and flossed can cut down on gum disease, drastically reducing risk of heart attack and stroke, dentists have warned for years. Now researchers at West Virginia University have found a clean mouth may also help preserve memory.

The National Institutes of Health (NIH) has awarded a $1.3 million grant over four years to further build on studies linking gum disease and mild to moderate memory loss.

"Older people might want to know there's more reason to keep their mouths clean -- to brush and floss -- than ever," said Richard Crout, D.M.D., Ph.D., an expert on gum disease and associate dean for research in the WVU School of Dentistry. "You'll not only be more likely to keep your teeth, but you'll also reduce your risk of heart attack, stroke and memory loss." More Here

Are you vulnerable to online Fraud?

A YouGov survey commissioned by VeriSign has revealed that at least 76 percent of Web users in India are at risk from online fraud because they are unable to identify the different forms of online phishing. Phishing scams and online frauds have created doubt and concern among online shoppers. To regain their trust, site owners need an easy, reliable way to show customers that their transactions are secure - the study said. Read how to avoid being a victim

Speedy surgical-orthodontic treatment with microimplants/temporary anchorage devices as an alternative to orthognathic surgery
Volume 135, Issue 6, Pages 787-798 (June 2009)
Introduction
We describe a new type of corticotomy-assisted orthodontic treatment called speedy orthodontics for treating severe anterior protrusion in adults. Once medullary bone is deformed after corticotomy, recovery to its original dimension is impossible if the greenstick fractured bone is ossified as it was deformed. Speedy orthodontics describes a protocol to allow movement of dental segments over a shorter time by using a corticotomy and an orthopedic force with temporary anchorage devices.
Methods
After proper diagnosis and treatment planning, the maxillary first premolars are removed, and then a corticotomy is performed to outline a block of bone around the maxillary anterior teeth under local anesthesia. An interval of 2 weeks is optimal between the labial and lingual corticotomy for sufficient healing and less patient anxiety. The maxillary anterior teeth are fixated into a single unit with the specially designed lingual retractor. A retraction force of 500 to 900 g per side is applied to the lingual retractor and the C-palatal plate placed in the midpalatal area. After anterior bone segment retraction, finishing is performed with full fixed appliances.
Results

Correct overbite and overjet, facial balance, and improvement of lip protrusion were obtained in adults with protrusion treated by speedy orthodontics.
Conclusions
This new type of treatment mechanics can be an effective alternative to orthognathic surgery in adults with protrusion.

Role of Antibiotics as Intracanal Medicament in Endodontics

Antibiotics are an extremely valuable addition to the armamentarium available to health practitioners for management of bacterial infections. Due to the potential risk of adverse systemic effects of systemic applications and ineffectiveness of systemic antibiotics in the necrotic pulpless tooth and the periradicular tissues, local application of antibiotics may be a more effective mode for delivering antibiotics to infected root canals. This paper reviews the
history, rationale, and applications of antibiotics and antibiotics-containing medicaments in endodontics. Full Paper

Smile Design Analysis with Digital Photographs

Digital pics can be a very useful tool in giving a beautiful smile to your patient. Not only they help you to document, they also can be an effective communication tool to your technician. Full paper

Impants, Orthodontics update and More

Plasma Dental Probe destroys oral bacteria

Biofilms are responsible for many hard-to-fight infections in the mouth and elsewhere. But in the study, biofilms cultivated in the root canal of extracted human teeth were easily destroyed with the plasma dental probe, as evidenced by scanning electron microscope images of near-pristine tooth surfaces after plasma treatment.

Though it looks like a tiny purple blowtorch, a pencil-sized plume of plasma on the tip of a small probe remains at room temperature as it swiftly dismantles tough bacterial colonies deep inside a human tooth. But it's not another futuristic product of George Lucas' imagination. It's the exciting work of USC School of Dentistry and Viterbi School of Engineering researchers looking for new ways to safely fight tenacious biofilm infections in patients – and it could revolutionize many facets of medicine. More HERE

Play computer game to learn Dental implant Techniques
A realistic computer game will soon be used to help dental students worldwide learn and reinforce dental implant procedures.

The implant simulation game uses multiple patients and clinical scenarios that can be randomly selected, letting students interact with virtul patients by asking about their medical history, examining them and arriving at a diagnosis. Like humans, the virtual patients have different personalities, and students must tailor treatment based on the mental, physical and emotional needs of the individual. More Here

New Method of treatment for Class II malocclusion

Throughout the years, various treatment modalities have been presented for the treatment of Class II Division 1 malocclusions. The goal of this paper is to present a treatment approach that involves the extraction of the maxillary first molars followed by use of fixed appliances with low-friction brackets. This treatment approach has proven to be an efficient treatment modality for Class II Division 1 malocclusions, especially with noncompliant patients. World J Orthod 2009;10:41–48.

MIA-assisted orthodontic treatment works great in patients with periodontal disease: World J Orthod 2009;10:49–56.

In contemporary dental care, an increasing number of adult patients with periodontal disease are seeking orthodontic treatment. Achieving optimal results in such adult patients is difficult because decreased posterior tooth anchorage is risky. This case report demonstrates the use of miniscrew implant anchorage (MIA) in a Chinese male 21 years 5 months of age with maxillary and mandibular anterior dental spacing, bimaxillary protrusion, and severe bone loss caused by periodontal disease. Prior to orthodontic treatment, the patient underwent treatment to control his periodontitis. The patient was treated with 0.022-in straight-wire orthodontic appliances. After 17 months of active orthodontic treatment, the patient had healthier periodontal tissue with increased bone support, as well as improved facial esthetics and a functional occlusion. The results demonstrate that MIA is useful in enhancing anchorage in patients with bone loss associated with severe periodontal disease.

Comprehensive review on use of Lasers in Orthodontics CLICK Here

New Design Implant better and has less marginal bone Loss
Clinical Oral Implants Research, Published Online: 7 Jun 2009

Objectives: An intra-individual controlled clinical trial was conducted to evaluate and compare the amount of marginal bone loss (MBL) found around implants of a comparable design, with or without retention grooves (microthreads) or polished necks, during the early stages of healing.

Materials and methods: Forty-eight (48) patients with missing mandibular posterior teeth were treated with two commercially available implants of the same brand (MIS): one with microthreads (S-model) and the other with a polished neck (L-model). MBL around each implant was measured on follow-up radiograms taken 4 months after placement (exposure and crown cementation), and 6 and 12 months after loading.

Results: Forty-six (46) patients completed the study, making 46 implant pairs available for statistical analysis. None of the implants failed to integrate. All the implants displayed some extent of bone loss throughout the follow-up period. At each time point (exposure, 6 and 12 months after loading), the S-model implants displayed statistically significant lower amounts of bone loss (0.22 vs. 0.76, 0.57 vs. 1.22 and 0.9 vs. 1.5 mm, respectively). Other than the type of the implant, no correlation was found between MBL and the implant stability values (PerioTest), dimensions, site of insertion or any of the other collected variables.

Conclusions: Implants with a roughened neck surface and microthreads are more resistant to MBL during the first phases of healing, as compared with implants with a polished neck.

Comparison of Internal hex v/s external hex in dental implants
Clinical Implant Dentistry and Related Research,Published Online: 12 May 2009

Purpose: The purpose of this study was to evaluate stress transfer patterns between implant–tooth-connected prostheses comparing rigid and semirigid connectors and internal and external hexagon implants.

Materials and Methods: Two models were made of photoelastic resin PL-2, with an internal hexagon implant of 4.00 × 13 mm and another with an external hexagon implant of 4.00 × 13 mm. Three denture designs were fabricated for each implant model, incorporating one type of connection in each one to connect implants and teeth: 1) welded rigid connection; 2) semirigid connection; and 3) rigid connection with occlusal screw. The models were placed in the polariscope, and 100-N axial forces were applied on fixed points on the occlusal surface of the dentures.

Results: There was a trend toward less intensity in the stresses on the semirigid connection and solid rigid connection in the model with the external hexagon; among the three types of connections in the model with the internal hexagon implant, the semirigid connection was the most unfavorable one; in the tooth–implant association, it is preferable to use the external hexagon implant.

Conclusions: The internal hexagon implant establishes a greater depth of hexagon retention and an increase in the level of denture stability in comparison with the implant with the external hexagon. However, this greater stability of the internal hexagon generated greater stresses in the abutment structures. Therefore, when this association is necessary, it is preferable to use the external hexagon implant.

Gastric Reflux is a Significant Causative Factor of Tooth Erosion
Journal of Dental Research, Vol. 88, No. 5, 422-426 (2009)

Dental erosion is caused by dietary or gastric acid. This study aimed to examine the location and severity of tooth erosion with respect to causative factors, and to determine whether the clinical pattern of erosion reflected the dominant etiological factor. The study involved 249 Icelandic individuals and included: a detailed medical history; clinical oral examination; salivary sampling, and analysis for flow rate, pH, and buffering capacity. Reflux was assessed in 91 individuals by gastroscopy, esophageal manometry, and 24-hour esophageal-pH monitoring. Reflux symptoms were reported by 36.5% individuals. Manometry results were abnormal in 8% of study participants, abnormal esophageal pH in 17.7%, and a pathological 24-hour pH recording in 21.3%. 3.6% were positive for Helicobacter pylori. Normal salivary flow was found in 92%, but low salivary buffering (10.4%) was associated with erosion into dentin (P < style="font-weight: bold;">Significant associations were found between erosion and diagnosed reflux disease (OR 2.772; P < style="color: rgb(255, 0, 0);">

Over Half Of People With Rheumatoid Arthritis Have Periodontitis
Over half (56%) of people with rheumatoid arthritis (RA) also have periodontitis (a chronic inflammatory disease of the gum and surrounding ligaments and bones that hold the teeth in place), displaying fewer teeth than healthy matched controls, high prevalence of oral sites presenting dental plaque and advanced attachment loss (the extent of periodontal support that has been destroyed around a tooth) (chi square p<0.05), style="font-weight: bold;">with RA who did not exhibit periodontitis (r=0.84, p<0.05; r="0.78," style="font-weight: bold;">significant improvement in periodontal status was seen in 20 (80%) of the 25 participants (mean age 41.5+3.7 years; mean disease duration 7.2+4.8 years), suggesting that the biological therapy may also be able to modulate the inflammatory process in the periodontium (the tissues investing and supporting the teeth, including the cementum, periodontal ligament, alveolar bone, and gingival / gums). Moderate to Severe Periodontitis may be a Risk Factor for Developing RA in Non-Smokers. More HERE

Erectile dysfunction and perio link, Dental Edu decay

Erectile Dysfunction and Periodontal disease LINK ?

UroToday.com - Together with Drs. Heruti, Bechor, Justo and Galor, we studied 815 Israeli male adults of whom 305 had complete data and were included in the statistical analysis. In the analyzed population, 2.1% of people without erectile dysfunction (ED) had advanced periodontal disease (defined as recession of periodontal bone of 6 mm or more) in comparison to 9.8% of the mild ED and 15.8% of the moderate/severe ED populations, respectively. However, due to the relatively small groups, we could not present the odds ratio. We are now planning a large-scale study to further establish the association between the two conditions. Full report

The mesioangular third molar – to extract or not to extract?

Mesioangular Impaction

Introduction Distal caries in lower second molars has been associated with mesioangular third molars. Caries detection and restoration can be difficult. If caries progresses, root canal treatment or extraction of the second molar can be necessary. Aims To identify the prevalence of caries in lower third molars and the distal aspect of corresponding lower second molars in patients referred for lower third molar assessment. Methods Analysis of OPG X-rays for 420 consecutive patients (776 third molars) referred to three maxillofacial centres over a five month period. Results Thirty-four percent of third molars were mesioangular. There was radiographic evidence of distal second molar caries in 42% of these. When unerupted mesioangular third molars were excluded this increased to 54%. There was no difference in age or dental health of these patients compared to the whole group. There was no angulation of the mesioangular third molar for which distal caries in the second molar was more likely. Full paper Conclusion Distal caries in lower second molars related to a mesioangular third molar is a common finding in oral and maxillofacial patients in secondary care, especially if the third molar is fully or partially erupted. If such a third molar is left in situ, close monitoring and regular bitewing radiographs are recommended.

You are loosing 3-4 Lakhs a year ?
"Root canals are the most predictable and profitable procedure in dentistry. Dentists who do not do endo lose on the average $90,000," declared a Virginia dentist. "Root canal therapy is a big money maker," agreed a California dentist. "It’s a great way to beef up the bottom line." Full Report

Single visit Root canal can be a very predictable procedure with Smart Endo, CLICK HERE to learn today and boost your bottomline.

Fresh charges against dental college

With more serious allegations cropping up against its management and a few teachers, the Baba Jaswant Singh Dental College is in the dock again.

Manraj Kaur Dhaliwal, an intern who has been demanding an inquiry into the issue of non-payment of stipend to interns among other irregularities, levelled some fresh allegations against the college on Friday. She said a few teachers had been taking undue advantage of their position when it came to awarding marks in the internal assessment and were exploiting girl students. More here

Dental Impressions become history
The intricate and laborious route from bite impression and plaster mold to model scanning in the laboratory could soon be a thing of the past. "The three-dimensional coordinates of the tooth surface can be determined on the basis of measurements taken in the patient's mouth," says Dr. Peter Kühmstedt, group manager for 3-D measurement technology at the Fraunhofer Institute for Applied Optics and Precision Engineering IOF in Jena.

Under a contract from German dental company Hint-Els, an expert team at the Fraunhofer institute developed an optical digitization system which scans the oral cavity and captures three-dimensional data of the teeth using camera optics. A complete picture of the individual tooth is created from several data records. After an all-round measurement, it is even possible to represent the complete jaw arch as a virtual computer image. The measurement conditions in the confined oral cavity are, however, unfavorable. To obtain precise results, the scientists use fringe projections in which a projector shines strips of light on the tooth area to be measured. Full report

10 most dangerous web search terms
In a recent report, McAfee has revealed Web search terms that put users most at risk for accidentally downloading unwanted or malicious software
.

The report, titled ''The Web's Most Dangerous Search Terms'', reveals that the researchers analysed over 2,600 of the most popular search terms of 2008 from a range of sources, including the Google Zeitgeist and the Yahoo! 2008 Year in Review.

"Search engines are our on-ramp, our highway and our off-ramp -- they're everything for Web travel. The hacking community is very smart -- they can spot a trend as well as any trendspotter," the Telegraph quoted Shane Keats, the research analyst with McAfee who led the study, as saying.

After analysing the search terms, the researchers found that hackers looking for crowds.

They are also attacking Internet surfers who are ready to take an online action, like downloading a ringtone or logging in to a site with a name, address and social security number. Full Report