Print Crowns, Project with Camera, Tooth worm, Swine flew

Get your all ceramic restorations out of your printer
Journal of Dental Research, Vol. 88, No. 7, 673-676 (2009)

CAD/CAM milling systems provide a rapid and individual method for the manufacturing of zirconia dental restorations. However, the disadvantages of these systems include limited accuracy, possible introduction of microscopic cracks, and a waste of material due to the principle of the ‘subtractive process’. The hypothesis of this study was that these issues can be overcome by a novel generative manufacturing technique, direct inkjet printing. A tailored zirconia-based ceramic suspension with 27 vol% solid content was synthesized. The suspension was printed on a conventional, but modified, drop-on-demand inkjet printer. A cleaning unit and a drying device allowed for the build-up of dense components of the size of a posterior crown. A characteristic strength of 763 MPa and a mean fracture toughness of 6.7 MPam0.5 were determined on 3D-printed and subsequently sintered specimens. The novel technique has great potential to produce, cost-efficiently, all-ceramic dental restorations at high accuracy and with a minimum of materials consumption.

Swine Flu
See this excellent power point presentation to know all and prevent it from spreading, CLICK HERE

How to Prevent and deal with Leding and Blockage of Root Canal
Ledge formation, that is the iatrogenically created irregularity in the root canal that impedes access of instruments to the apex, and canal blockage caused by packing dentin chips and/or tissue debris are the least-studied parameters of root canal instrumentation. Variables associated with ledge formation and canal blockage by dentin chips and/or tissue debris
are presented. Most common causes, recognition, management, prognosis, and prevention is discussed. FULL PAPER

Tooth worm Myth ? Proved true by Research,Do worm-like structures cause tooth decay?

Washington (IANS): For years, scientists have debated the exact nature of the worm like structures inside a human tooth. The structures are not worms, but what they are is still in question.

Micro-images in a dissected molar suggest they caused tooth decay.

Studies by University of Maryland (U-M) Dental School researchers' revealed cylindrical objects extending or 'growing' out of the natural pores or tubules of teeth.

Inside a human tooth, more than 50,000 such tubules per square mm act as channels running from the nerve up through the tooth. They are associated with transporting hot or cold sensitivity to the tooth. More Here
image here

Now get a Digital Camera with Built in Projector

The Nikon Coolpix S1000pj will let you project images after you take them, priced at $430, will be available this September
It will come with a 12-megapixel sensor, a 5X optical Nikkor zoom lens (28mm to 240mm), a 2.7-inch-diagonal LCD, and ISO levels of up to 3200 at full resolution (as well as ISO 6400 at a 3-megapixel resolution).The miniature projector (on the front and center of the camera) has a 10-inch to 6.5-foot throw range, standard-definition VGA resolution, and a brightness rating of 10 lumens.
More here

Promote Optimal Oral Health With Probiotics

Based on extensive research, Life Extension introduces Advanced Oral Hygiene, an oral health lozenge that contains the probiotics S. salivarius and B. coagulans, two strains of beneficial bacteria to help maintain healthy teeth and gums. Similar to the mechanisms involved with probiotics which target the gut, these probiotics populate the mouth cavity with beneficial bacteria which provide protection against harmful bacteria that are implicated in the accumulation of dental film. More Here

Alveolar bone regeneration by transplantation of periodontal ligament stem cells and bone marrow stem cells in canine peri-implant defects model: A pilot study
Journal of Periodontology, online on July 22, 2009

The test groups were more effective than control group on alveolar bone regeneration in surgically created peri-implant saddle-like defects. The BMSCs group had the highest new bone formation (34.99% and 40.17% at each healing time) followed by the PDLSCs group (31.90% and 36.51%) and control group (23.13% and 28.36%), respectively. The test groups exhibited a significantly higher new bone formation than the control group at 8 weeks, but the same was true only for the BMSCs group at 16 weeks (P <0.05).More Here

Kids on Junk food will have small mandibles ?
EJO July 2009

The aim of the present study was to investigate the influences of changes in mastication on mandibular growth and morphology. Twenty-five 3-week-old (at the time of weaning) imprinting control region mice were randomly divided into three groups: mice fed a hard diet (HD), mice fed a soft diet (SD), and mice alternately fed hard and soft diets (HSDs) every week for 4 weeks. The morphometry of the mandible was analysed using 3D microcomputed tomography (µCT). Statistical analysis was undertaken using a t-test.

µCT analysis showed that the condylar width was significantly greater in the HD group than in the SD group after 1 week. After 4 weeks, mandibular length was significantly longer and ramus height was greater in the HSD group than in the other two groups. Bone volume was significantly less in the SD group than in the other two groups after 4 weeks. These findings suggest that changes in mastication markedly affect mandibular condylar cartilage growth and mandibular morphology. It is considered that dietary education at an early age is important in order to prevent disruption of the development of the mandible.